TM.cpp@ 104557

Last change on this file since 104557 was 104131, checked in by vboxsync, 7 months ago
VMM/TM: Allow linear scaling of the guest TSC; primarily required for scaling up a 24MHz tickrate on ARM64 hosts.
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1	/* $Id: TM.cpp 104131 2024-04-03 08:02:36Z vboxsync $ */
2	/** @file
3	* TM - Time Manager.
4	*/
5
6	/*
7	* Copyright (C) 2006-2023 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28	/** @page pg_tm TM - The Time Manager
29	*
30	* The Time Manager abstracts the CPU clocks and manages timers used by the VMM,
31	* device and drivers.
32	*
33	* @see grp_tm
34	*
35	*
36	* @section sec_tm_clocks Clocks
37	*
38	* There are currently 4 clocks:
39	* - Virtual (guest).
40	* - Synchronous virtual (guest).
41	* - CPU Tick (TSC) (guest). Only current use is rdtsc emulation. Usually a
42	* function of the virtual clock.
43	* - Real (host). This is only used for display updates atm.
44	*
45	* The most important clocks are the three first ones and of these the second is
46	* the most interesting.
47	*
48	*
49	* The synchronous virtual clock is tied to the virtual clock except that it
50	* will take into account timer delivery lag caused by host scheduling. It will
51	* normally never advance beyond the head timer, and when lagging too far behind
52	* it will gradually speed up to catch up with the virtual clock. All devices
53	* implementing time sources accessible to and used by the guest is using this
54	* clock (for timers and other things). This ensures consistency between the
55	* time sources.
56	*
57	* The virtual clock is implemented as an offset to a monotonic, high
58	* resolution, wall clock. The current time source is using the RTTimeNanoTS()
59	* machinery based upon the Global Info Pages (GIP), that is, we're using TSC
60	* deltas (usually 10 ms) to fill the gaps between GIP updates. The result is
61	* a fairly high res clock that works in all contexts and on all hosts. The
62	* virtual clock is paused when the VM isn't in the running state.
63	*
64	* The CPU tick (TSC) is normally virtualized as a function of the synchronous
65	* virtual clock, where the frequency defaults to the host cpu frequency (as we
66	* measure it). In this mode it is possible to configure the frequency. Another
67	* (non-default) option is to use the raw unmodified host TSC values. And yet
68	* another, to tie it to time spent executing guest code. All these things are
69	* configurable should non-default behavior be desirable.
70	*
71	* The real clock is a monotonic clock (when available) with relatively low
72	* resolution, though this a bit host specific. Note that we're currently not
73	* servicing timers using the real clock when the VM is not running, this is
74	* simply because it has not been needed yet therefore not implemented.
75	*
76	*
77	* @subsection subsec_tm_timesync Guest Time Sync / UTC time
78	*
79	* Guest time syncing is primarily taken care of by the VMM device. The
80	* principle is very simple, the guest additions periodically asks the VMM
81	* device what the current UTC time is and makes adjustments accordingly.
82	*
83	* A complicating factor is that the synchronous virtual clock might be doing
84	* catchups and the guest perception is currently a little bit behind the world
85	* but it will (hopefully) be catching up soon as we're feeding timer interrupts
86	* at a slightly higher rate. Adjusting the guest clock to the current wall
87	* time in the real world would be a bad idea then because the guest will be
88	* advancing too fast and run ahead of world time (if the catchup works out).
89	* To solve this problem TM provides the VMM device with an UTC time source that
90	* gets adjusted with the current lag, so that when the guest eventually catches
91	* up the lag it will be showing correct real world time.
92	*
93	*
94	* @section sec_tm_timers Timers
95	*
96	* The timers can use any of the TM clocks described in the previous section.
97	* Each clock has its own scheduling facility, or timer queue if you like.
98	* There are a few factors which makes it a bit complex. First, there is the
99	* usual R0 vs R3 vs. RC thing. Then there are multiple threads, and then there
100	* is the timer thread that periodically checks whether any timers has expired
101	* without EMT noticing. On the API level, all but the create and save APIs
102	* must be multithreaded. EMT will always run the timers.
103	*
104	* The design is using a doubly linked list of active timers which is ordered
105	* by expire date. This list is only modified by the EMT thread. Updates to
106	* the list are batched in a singly linked list, which is then processed by the
107	* EMT thread at the first opportunity (immediately, next time EMT modifies a
108	* timer on that clock, or next timer timeout). Both lists are offset based and
109	* all the elements are therefore allocated from the hyper heap.
110	*
111	* For figuring out when there is need to schedule and run timers TM will:
112	* - Poll whenever somebody queries the virtual clock.
113	* - Poll the virtual clocks from the EM and REM loops.
114	* - Poll the virtual clocks from trap exit path.
115	* - Poll the virtual clocks and calculate first timeout from the halt loop.
116	* - Employ a thread which periodically (100Hz) polls all the timer queues.
117	*
118	*
119	* @image html TMTIMER-Statechart-Diagram.gif
120	*
121	* @section sec_tm_timer Logging
122	*
123	* Level 2: Logs a most of the timer state transitions and queue servicing.
124	* Level 3: Logs a few oddments.
125	* Level 4: Logs TMCLOCK_VIRTUAL_SYNC catch-up events.
126	*
127	*/
128
129
130	/*********************************************************************************************************************************
131	* Header Files *
132	*********************************************************************************************************************************/
133	#define LOG_GROUP LOG_GROUP_TM
134	#ifdef DEBUG_bird
135	# define DBGFTRACE_DISABLED /* annoying */
136	#endif
137	#include <VBox/vmm/tm.h>
138	#include <VBox/vmm/vmm.h>
139	#include <VBox/vmm/mm.h>
140	#include <VBox/vmm/hm.h>
141	#include <VBox/vmm/nem.h>
142	#include <VBox/vmm/gim.h>
143	#include <VBox/vmm/ssm.h>
144	#include <VBox/vmm/dbgf.h>
145	#include <VBox/vmm/dbgftrace.h>
146	#include <VBox/vmm/pdmapi.h>
147	#include <VBox/vmm/iom.h>
148	#include "TMInternal.h"
149	#include <VBox/vmm/vm.h>
150	#include <VBox/vmm/uvm.h>
151
152	#include <VBox/vmm/pdmdev.h>
153	#include <VBox/log.h>
154	#include <VBox/param.h>
155	#include <VBox/err.h>
156
157	#include <iprt/asm.h>
158	#include <iprt/asm-math.h>
159	#include <iprt/assert.h>
160	#include <iprt/env.h>
161	#include <iprt/file.h>
162	#include <iprt/getopt.h>
163	#include <iprt/mem.h>
164	#include <iprt/rand.h>
165	#include <iprt/semaphore.h>
166	#include <iprt/string.h>
167	#include <iprt/thread.h>
168	#include <iprt/time.h>
169	#include <iprt/timer.h>
170
171	#include "TMInline.h"
172
173
174	/*********************************************************************************************************************************
175	* Defined Constants And Macros *
176	*********************************************************************************************************************************/
177	/** The current saved state version.*/
178	#define TM_SAVED_STATE_VERSION 3
179
180
181	/*********************************************************************************************************************************
182	* Internal Functions *
183	*********************************************************************************************************************************/
184	static bool tmR3HasFixedTSC(PVM pVM);
185	static uint64_t tmR3CalibrateTSC(void);
186	static DECLCALLBACK(int) tmR3Save(PVM pVM, PSSMHANDLE pSSM);
187	static DECLCALLBACK(int) tmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass);
188	#ifdef VBOX_WITH_STATISTICS
189	static void tmR3TimerQueueRegisterStats(PVM pVM, PTMTIMERQUEUE pQueue, uint32_t cTimers);
190	#endif
191	static DECLCALLBACK(void) tmR3TimerCallback(PRTTIMER pTimer, void *pvUser, uint64_t iTick);
192	static DECLCALLBACK(int) tmR3SetWarpDrive(PUVM pUVM, uint32_t u32Percent);
193	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
194	static DECLCALLBACK(void) tmR3CpuLoadTimer(PVM pVM, TMTIMERHANDLE hTimer, void *pvUser);
195	#endif
196	static DECLCALLBACK(void) tmR3TimerInfo(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
197	static DECLCALLBACK(void) tmR3TimerInfoActive(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
198	static DECLCALLBACK(void) tmR3InfoClocks(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
199	static DECLCALLBACK(void) tmR3InfoCpuLoad(PVM pVM, PCDBGFINFOHLP pHlp, int cArgs, char **papszArgs);
200	static DECLCALLBACK(VBOXSTRICTRC) tmR3CpuTickParavirtDisable(PVM pVM, PVMCPU pVCpu, void *pvData);
201	static const char *tmR3GetTSCModeName(PVM pVM);
202	static const char *tmR3GetTSCModeNameEx(TMTSCMODE enmMode);
203	static int tmR3TimerQueueGrow(PVM pVM, PTMTIMERQUEUE pQueue, uint32_t cNewTimers);
204
205
206	/**
207	* Initializes the TM.
208	*
209	* @returns VBox status code.
210	* @param pVM The cross context VM structure.
211	*/
212	VMM_INT_DECL(int) TMR3Init(PVM pVM)
213	{
214	LogFlow(("TMR3Init:\n"));
215
216	/*
217	* Assert alignment and sizes.
218	*/
219	AssertCompileMemberAlignment(VM, tm.s, 32);
220	AssertCompile(sizeof(pVM->tm.s) <= sizeof(pVM->tm.padding));
221	AssertCompileMemberAlignment(TM, VirtualSyncLock, 8);
222
223	/*
224	* Init the structure.
225	*/
226	pVM->tm.s.idTimerCpu = pVM->cCpus - 1; /* The last CPU. */
227
228	int rc = PDMR3CritSectInit(pVM, &pVM->tm.s.VirtualSyncLock, RT_SRC_POS, "TM VirtualSync Lock");
229	AssertLogRelRCReturn(rc, rc);
230
231	strcpy(pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL].szName, "virtual");
232	strcpy(pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC].szName, "virtual_sync"); /* Underscore is for STAM ordering issue. */
233	strcpy(pVM->tm.s.aTimerQueues[TMCLOCK_REAL].szName, "real");
234	strcpy(pVM->tm.s.aTimerQueues[TMCLOCK_TSC].szName, "tsc");
235
236	for (uint32_t i = 0; i < RT_ELEMENTS(pVM->tm.s.aTimerQueues); i++)
237	{
238	Assert(pVM->tm.s.aTimerQueues[i].szName[0] != '\0');
239	pVM->tm.s.aTimerQueues[i].enmClock = (TMCLOCK)i;
240	pVM->tm.s.aTimerQueues[i].u64Expire = INT64_MAX;
241	pVM->tm.s.aTimerQueues[i].idxActive = UINT32_MAX;
242	pVM->tm.s.aTimerQueues[i].idxSchedule = UINT32_MAX;
243	pVM->tm.s.aTimerQueues[i].idxFreeHint = 1;
244	pVM->tm.s.aTimerQueues[i].fBeingProcessed = false;
245	pVM->tm.s.aTimerQueues[i].fCannotGrow = false;
246	pVM->tm.s.aTimerQueues[i].hThread = NIL_RTTHREAD;
247	pVM->tm.s.aTimerQueues[i].hWorkerEvt = NIL_SUPSEMEVENT;
248
249	rc = PDMR3CritSectInit(pVM, &pVM->tm.s.aTimerQueues[i].TimerLock, RT_SRC_POS,
250	"TM %s queue timer lock", pVM->tm.s.aTimerQueues[i].szName);
251	AssertLogRelRCReturn(rc, rc);
252
253	rc = PDMR3CritSectRwInit(pVM, &pVM->tm.s.aTimerQueues[i].AllocLock, RT_SRC_POS,
254	"TM %s queue alloc lock", pVM->tm.s.aTimerQueues[i].szName);
255	AssertLogRelRCReturn(rc, rc);
256	}
257
258	/*
259	* We directly use the GIP to calculate the virtual time. We map the
260	* the GIP into the guest context so we can do this calculation there
261	* as well and save costly world switches.
262	*/
263	PSUPGLOBALINFOPAGE pGip = g_pSUPGlobalInfoPage;
264	if (pGip \|\| !SUPR3IsDriverless())
265	{
266	pVM->tm.s.pvGIPR3 = (void *)pGip;
267	AssertMsgReturn(pVM->tm.s.pvGIPR3, ("GIP support is now required!\n"), VERR_TM_GIP_REQUIRED);
268	AssertMsgReturn((pGip->u32Version >> 16) == (SUPGLOBALINFOPAGE_VERSION >> 16),
269	("Unsupported GIP version %#x! (expected=%#x)\n", pGip->u32Version, SUPGLOBALINFOPAGE_VERSION),
270	VERR_TM_GIP_VERSION);
271
272	/* Check assumptions made in TMAllVirtual.cpp about the GIP update interval. */
273	if ( pGip->u32Magic == SUPGLOBALINFOPAGE_MAGIC
274	&& pGip->u32UpdateIntervalNS >= 250000000 /* 0.25s */)
275	return VMSetError(pVM, VERR_TM_GIP_UPDATE_INTERVAL_TOO_BIG, RT_SRC_POS,
276	N_("The GIP update interval is too big. u32UpdateIntervalNS=%RU32 (u32UpdateHz=%RU32)"),
277	pGip->u32UpdateIntervalNS, pGip->u32UpdateHz);
278
279	/* Log GIP info that may come in handy. */
280	LogRel(("TM: GIP - u32Mode=%d (%s) u32UpdateHz=%u u32UpdateIntervalNS=%u enmUseTscDelta=%d (%s) fGetGipCpu=%#x cCpus=%d\n",
281	pGip->u32Mode, SUPGetGIPModeName(pGip), pGip->u32UpdateHz, pGip->u32UpdateIntervalNS,
282	pGip->enmUseTscDelta, SUPGetGIPTscDeltaModeName(pGip), pGip->fGetGipCpu, pGip->cCpus));
283	LogRel(("TM: GIP - u64CpuHz=%'RU64 (%#RX64) SUPGetCpuHzFromGip => %'RU64\n",
284	pGip->u64CpuHz, pGip->u64CpuHz, SUPGetCpuHzFromGip(pGip)));
285	for (uint32_t iCpuSet = 0; iCpuSet < RT_ELEMENTS(pGip->aiCpuFromCpuSetIdx); iCpuSet++)
286	{
287	uint16_t iGipCpu = pGip->aiCpuFromCpuSetIdx[iCpuSet];
288	if (iGipCpu != UINT16_MAX)
289	LogRel(("TM: GIP - CPU: iCpuSet=%#x idCpu=%#x idApic=%#x iGipCpu=%#x i64TSCDelta=%RI64 enmState=%d u64CpuHz=%RU64(*) cErrors=%u\n",
290	iCpuSet, pGip->aCPUs[iGipCpu].idCpu, pGip->aCPUs[iGipCpu].idApic, iGipCpu, pGip->aCPUs[iGipCpu].i64TSCDelta,
291	pGip->aCPUs[iGipCpu].enmState, pGip->aCPUs[iGipCpu].u64CpuHz, pGip->aCPUs[iGipCpu].cErrors));
292	}
293	}
294
295	/*
296	* Setup the VirtualGetRaw backend.
297	*/
298	pVM->tm.s.pfnVirtualGetRaw = tmVirtualNanoTSRediscover;
299	pVM->tm.s.VirtualGetRawData.pfnRediscover = tmVirtualNanoTSRediscover;
300	pVM->tm.s.VirtualGetRawData.pfnBad = tmVirtualNanoTSBad;
301	pVM->tm.s.VirtualGetRawData.pfnBadCpuIndex = tmVirtualNanoTSBadCpuIndex;
302	pVM->tm.s.VirtualGetRawData.pu64Prev = &pVM->tm.s.u64VirtualRawPrev;
303
304	/*
305	* Get our CFGM node, create it if necessary.
306	*/
307	PCFGMNODE pCfgHandle = CFGMR3GetChild(CFGMR3GetRoot(pVM), "TM");
308	if (!pCfgHandle)
309	{
310	rc = CFGMR3InsertNode(CFGMR3GetRoot(pVM), "TM", &pCfgHandle);
311	AssertRCReturn(rc, rc);
312	}
313
314	/*
315	* Specific errors about some obsolete TM settings (remove after 2015-12-03).
316	*/
317	if (CFGMR3Exists(pCfgHandle, "TSCVirtualized"))
318	return VMSetError(pVM, VERR_CFGM_CONFIG_UNKNOWN_VALUE, RT_SRC_POS,
319	N_("Configuration error: TM setting \"TSCVirtualized\" is no longer supported. Use the \"TSCMode\" setting instead."));
320	if (CFGMR3Exists(pCfgHandle, "UseRealTSC"))
321	return VMSetError(pVM, VERR_CFGM_CONFIG_UNKNOWN_VALUE, RT_SRC_POS,
322	N_("Configuration error: TM setting \"UseRealTSC\" is no longer supported. Use the \"TSCMode\" setting instead."));
323
324	if (CFGMR3Exists(pCfgHandle, "MaybeUseOffsettedHostTSC"))
325	return VMSetError(pVM, VERR_CFGM_CONFIG_UNKNOWN_VALUE, RT_SRC_POS,
326	N_("Configuration error: TM setting \"MaybeUseOffsettedHostTSC\" is no longer supported. Use the \"TSCMode\" setting instead."));
327
328	/*
329	* Validate the rest of the TM settings.
330	*/
331	rc = CFGMR3ValidateConfig(pCfgHandle, "/TM/",
332	"TSCMode\|"
333	"TSCModeSwitchAllowed\|"
334	"TSCTicksPerSecond\|"
335	"TSCTiedToExecution\|"
336	"TSCNotTiedToHalt\|"
337	"TSCMultiplier\|"
338	"ScheduleSlack\|"
339	"CatchUpStopThreshold\|"
340	"CatchUpGiveUpThreshold\|"
341	"CatchUpStartThreshold0\|CatchUpStartThreshold1\|CatchUpStartThreshold2\|CatchUpStartThreshold3\|"
342	"CatchUpStartThreshold4\|CatchUpStartThreshold5\|CatchUpStartThreshold6\|CatchUpStartThreshold7\|"
343	"CatchUpStartThreshold8\|CatchUpStartThreshold9\|"
344	"CatchUpPrecentage0\|CatchUpPrecentage1\|CatchUpPrecentage2\|CatchUpPrecentage3\|"
345	"CatchUpPrecentage4\|CatchUpPrecentage5\|CatchUpPrecentage6\|CatchUpPrecentage7\|"
346	"CatchUpPrecentage8\|CatchUpPrecentage9\|"
347	"UTCOffset\|"
348	"UTCTouchFileOnJump\|"
349	"WarpDrivePercentage\|"
350	"HostHzMax\|"
351	"HostHzFudgeFactorTimerCpu\|"
352	"HostHzFudgeFactorOtherCpu\|"
353	"HostHzFudgeFactorCatchUp100\|"
354	"HostHzFudgeFactorCatchUp200\|"
355	"HostHzFudgeFactorCatchUp400\|"
356	"TimerMillies"
357	,
358	"",
359	"TM", 0);
360	if (RT_FAILURE(rc))
361	return rc;
362
363	/*
364	* Determine the TSC configuration and frequency.
365	*/
366	/** @cfgm{/TM/TSCMode, string, Depends on the CPU and VM config}
367	* The name of the TSC mode to use: VirtTSCEmulated, RealTSCOffset or Dynamic.
368	* The default depends on the VM configuration and the capabilities of the
369	* host CPU. Other config options or runtime changes may override the TSC
370	* mode specified here.
371	*/
372	char szTSCMode[32];
373	rc = CFGMR3QueryString(pCfgHandle, "TSCMode", szTSCMode, sizeof(szTSCMode));
374	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
375	{
376	/** @todo Rainy-day/never: Dynamic mode isn't currently suitable for SMP VMs, so
377	* fall back on the more expensive emulated mode. With the current TSC handling
378	* (frequent switching between offsetted mode and taking VM exits, on all VCPUs
379	* without any kind of coordination) will lead to inconsistent TSC behavior with
380	* guest SMP, including TSC going backwards. */
381	pVM->tm.s.enmTSCMode = NEMR3NeedSpecialTscMode(pVM) ? TMTSCMODE_NATIVE_API
382	: pVM->cCpus == 1 && tmR3HasFixedTSC(pVM) ? TMTSCMODE_DYNAMIC : TMTSCMODE_VIRT_TSC_EMULATED;
383	}
384	else if (RT_FAILURE(rc))
385	return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: Failed to querying string value \"TSCMode\""));
386	else
387	{
388	if (!RTStrCmp(szTSCMode, "VirtTSCEmulated"))
389	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
390	else if (!RTStrCmp(szTSCMode, "RealTSCOffset"))
391	pVM->tm.s.enmTSCMode = TMTSCMODE_REAL_TSC_OFFSET;
392	else if (!RTStrCmp(szTSCMode, "Dynamic"))
393	pVM->tm.s.enmTSCMode = TMTSCMODE_DYNAMIC;
394	else
395	return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: Unrecognized TM TSC mode value \"%s\""), szTSCMode);
396	if (NEMR3NeedSpecialTscMode(pVM))
397	{
398	LogRel(("TM: NEM overrides the /TM/TSCMode=%s settings.\n", szTSCMode));
399	pVM->tm.s.enmTSCMode = TMTSCMODE_NATIVE_API;
400	}
401	}
402
403	/**
404	* @cfgm{/TM/TSCModeSwitchAllowed, bool, Whether TM TSC mode switch is allowed
405	* at runtime}
406	* When using paravirtualized guests, we dynamically switch TSC modes to a more
407	* optimal one for performance. This setting allows overriding this behaviour.
408	*/
409	rc = CFGMR3QueryBool(pCfgHandle, "TSCModeSwitchAllowed", &pVM->tm.s.fTSCModeSwitchAllowed);
410	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
411	{
412	/* This is finally determined in TMR3InitFinalize() as GIM isn't initialized yet. */
413	pVM->tm.s.fTSCModeSwitchAllowed = true;
414	}
415	else if (RT_FAILURE(rc))
416	return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: Failed to querying bool value \"TSCModeSwitchAllowed\""));
417	if (pVM->tm.s.fTSCModeSwitchAllowed && pVM->tm.s.enmTSCMode == TMTSCMODE_NATIVE_API)
418	{
419	LogRel(("TM: NEM overrides the /TM/TSCModeSwitchAllowed setting.\n"));
420	pVM->tm.s.fTSCModeSwitchAllowed = false;
421	}
422
423	/** @cfgm{/TM/TSCMultiplier, uint8_t}
424	* This is a multiplier to apply to the host TSC while calculating the guest
425	* TSC. It's recommended to avoid using a power-of-two value to reduce number
426	* of zeros in least-significant-bits of the scaled TSC. Defaults to 43 on
427	* ARM64 and 1 on all other hosts. */
428	#ifdef RT_ARCH_ARM64
429	pVM->tm.s.u8TSCMultiplier = 43; /* 125/3 + some fudge to get us >= 1GHz from 24MHz */
430	#else
431	pVM->tm.s.u8TSCMultiplier = 1;
432	#endif
433	rc = CFGMR3QueryU8Def(pCfgHandle, "TSCMultiplier", &pVM->tm.s.u8TSCMultiplier, pVM->tm.s.u8TSCMultiplier);
434	if (RT_FAILURE(rc))
435	return VMSetError(pVM, rc, RT_SRC_POS,
436	N_("Configuration error: Failed to query 8-bit value \"TSCMultiplier\""));
437	if (pVM->tm.s.u8TSCMultiplier == 0)
438	return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: \"TSCMultiplier\" must not be zero!"));
439
440	/** @cfgm{/TM/TSCTicksPerSecond, uint32_t, Current TSC frequency from GIP}
441	* The number of TSC ticks per second (i.e. the TSC frequency). This will
442	* override enmTSCMode.
443	*/
444	pVM->tm.s.cTSCTicksPerSecondHost = tmR3CalibrateTSC();
445	rc = CFGMR3QueryU64(pCfgHandle, "TSCTicksPerSecond", &pVM->tm.s.cTSCTicksPerSecond);
446	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
447	{
448	pVM->tm.s.cTSCTicksPerSecond = pVM->tm.s.cTSCTicksPerSecondHost * pVM->tm.s.u8TSCMultiplier;
449	if ( ( pVM->tm.s.enmTSCMode == TMTSCMODE_DYNAMIC
450	\|\| pVM->tm.s.enmTSCMode == TMTSCMODE_VIRT_TSC_EMULATED)
451	&& pVM->tm.s.cTSCTicksPerSecond >= _4G)
452	{
453	pVM->tm.s.cTSCTicksPerSecond = _4G - 1; /* (A limitation of our math code) */
454	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
455	}
456	}
457	else if (RT_FAILURE(rc))
458	return VMSetError(pVM, rc, RT_SRC_POS,
459	N_("Configuration error: Failed to querying uint64_t value \"TSCTicksPerSecond\""));
460	else if ( pVM->tm.s.cTSCTicksPerSecond < _1M
461	\|\| pVM->tm.s.cTSCTicksPerSecond >= _4G)
462	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS,
463	N_("Configuration error: \"TSCTicksPerSecond\" = %RI64 is not in the range 1MHz..4GHz-1"),
464	pVM->tm.s.cTSCTicksPerSecond);
465	else if (pVM->tm.s.enmTSCMode != TMTSCMODE_NATIVE_API)
466	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
467	else
468	{
469	LogRel(("TM: NEM overrides the /TM/TSCTicksPerSecond=%RU64 setting.\n", pVM->tm.s.cTSCTicksPerSecond));
470	pVM->tm.s.cTSCTicksPerSecond = pVM->tm.s.cTSCTicksPerSecondHost * pVM->tm.s.u8TSCMultiplier;
471	}
472
473	/** @cfgm{/TM/TSCTiedToExecution, bool, false}
474	* Whether the TSC should be tied to execution. This will exclude most of the
475	* virtualization overhead, but will by default include the time spent in the
476	* halt state (see TM/TSCNotTiedToHalt). This setting will override all other
477	* TSC settings except for TSCTicksPerSecond and TSCNotTiedToHalt, which should
478	* be used avoided or used with great care. Note that this will only work right
479	* together with VT-x or AMD-V, and with a single virtual CPU. */
480	rc = CFGMR3QueryBoolDef(pCfgHandle, "TSCTiedToExecution", &pVM->tm.s.fTSCTiedToExecution, false);
481	if (RT_FAILURE(rc))
482	return VMSetError(pVM, rc, RT_SRC_POS,
483	N_("Configuration error: Failed to querying bool value \"TSCTiedToExecution\""));
484	if (pVM->tm.s.fTSCTiedToExecution && pVM->tm.s.enmTSCMode == TMTSCMODE_NATIVE_API)
485	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, N_("/TM/TSCTiedToExecution is not supported in NEM mode!"));
486	if (pVM->tm.s.fTSCTiedToExecution)
487	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
488
489
490	/** @cfgm{/TM/TSCNotTiedToHalt, bool, false}
491	* This is used with /TM/TSCTiedToExecution to control how TSC operates
492	* accross HLT instructions. When true HLT is considered execution time and
493	* TSC continues to run, while when false (default) TSC stops during halt. */
494	rc = CFGMR3QueryBoolDef(pCfgHandle, "TSCNotTiedToHalt", &pVM->tm.s.fTSCNotTiedToHalt, false);
495	if (RT_FAILURE(rc))
496	return VMSetError(pVM, rc, RT_SRC_POS,
497	N_("Configuration error: Failed to querying bool value \"TSCNotTiedToHalt\""));
498
499	/*
500	* Configure the timer synchronous virtual time.
501	*/
502	/** @cfgm{/TM/ScheduleSlack, uint32_t, ns, 0, UINT32_MAX, 100000}
503	* Scheduling slack when processing timers. */
504	rc = CFGMR3QueryU32(pCfgHandle, "ScheduleSlack", &pVM->tm.s.u32VirtualSyncScheduleSlack);
505	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
506	pVM->tm.s.u32VirtualSyncScheduleSlack = 100000; /* 0.100ms (ASSUMES virtual time is nanoseconds) */
507	else if (RT_FAILURE(rc))
508	return VMSetError(pVM, rc, RT_SRC_POS,
509	N_("Configuration error: Failed to querying 32-bit integer value \"ScheduleSlack\""));
510
511	/** @cfgm{/TM/CatchUpStopThreshold, uint64_t, ns, 0, UINT64_MAX, 500000}
512	* When to stop a catch-up, considering it successful. */
513	rc = CFGMR3QueryU64(pCfgHandle, "CatchUpStopThreshold", &pVM->tm.s.u64VirtualSyncCatchUpStopThreshold);
514	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
515	pVM->tm.s.u64VirtualSyncCatchUpStopThreshold = 500000; /* 0.5ms */
516	else if (RT_FAILURE(rc))
517	return VMSetError(pVM, rc, RT_SRC_POS,
518	N_("Configuration error: Failed to querying 64-bit integer value \"CatchUpStopThreshold\""));
519
520	/** @cfgm{/TM/CatchUpGiveUpThreshold, uint64_t, ns, 0, UINT64_MAX, 60000000000}
521	* When to give up a catch-up attempt. */
522	rc = CFGMR3QueryU64(pCfgHandle, "CatchUpGiveUpThreshold", &pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold);
523	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
524	pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold = UINT64_C(60000000000); /* 60 sec */
525	else if (RT_FAILURE(rc))
526	return VMSetError(pVM, rc, RT_SRC_POS,
527	N_("Configuration error: Failed to querying 64-bit integer value \"CatchUpGiveUpThreshold\""));
528
529
530	/** @cfgm{/TM/CatchUpPrecentage[0..9], uint32_t, %, 1, 2000, various}
531	* The catch-up percent for a given period. */
532	/** @cfgm{/TM/CatchUpStartThreshold[0..9], uint64_t, ns, 0, UINT64_MAX}
533	* The catch-up period threshold, or if you like, when a period starts. */
534	#define TM_CFG_PERIOD(iPeriod, DefStart, DefPct) \
535	do \
536	{ \
537	uint64_t u64; \
538	rc = CFGMR3QueryU64(pCfgHandle, "CatchUpStartThreshold" #iPeriod, &u64); \
539	if (rc == VERR_CFGM_VALUE_NOT_FOUND) \
540	u64 = UINT64_C(DefStart); \
541	else if (RT_FAILURE(rc)) \
542	return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: Failed to querying 64-bit integer value \"CatchUpThreshold" #iPeriod "\"")); \
543	if ( (iPeriod > 0 && u64 <= pVM->tm.s.aVirtualSyncCatchUpPeriods[iPeriod - 1].u64Start) \
544	\|\| u64 >= pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold) \
545	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, N_("Configuration error: Invalid start of period #" #iPeriod ": %'RU64"), u64); \
546	pVM->tm.s.aVirtualSyncCatchUpPeriods[iPeriod].u64Start = u64; \
547	rc = CFGMR3QueryU32(pCfgHandle, "CatchUpPrecentage" #iPeriod, &pVM->tm.s.aVirtualSyncCatchUpPeriods[iPeriod].u32Percentage); \
548	if (rc == VERR_CFGM_VALUE_NOT_FOUND) \
549	pVM->tm.s.aVirtualSyncCatchUpPeriods[iPeriod].u32Percentage = (DefPct); \
550	else if (RT_FAILURE(rc)) \
551	return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: Failed to querying 32-bit integer value \"CatchUpPrecentage" #iPeriod "\"")); \
552	} while (0)
553	/* This needs more tuning. Not sure if we really need so many period and be so gentle. */
554	TM_CFG_PERIOD(0, 750000, 5); /* 0.75ms at 1.05x */
555	TM_CFG_PERIOD(1, 1500000, 10); /* 1.50ms at 1.10x */
556	TM_CFG_PERIOD(2, 8000000, 25); /* 8ms at 1.25x */
557	TM_CFG_PERIOD(3, 30000000, 50); /* 30ms at 1.50x */
558	TM_CFG_PERIOD(4, 75000000, 75); /* 75ms at 1.75x */
559	TM_CFG_PERIOD(5, 175000000, 100); /* 175ms at 2x */
560	TM_CFG_PERIOD(6, 500000000, 200); /* 500ms at 3x */
561	TM_CFG_PERIOD(7, 3000000000, 300); /* 3s at 4x */
562	TM_CFG_PERIOD(8,30000000000, 400); /* 30s at 5x */
563	TM_CFG_PERIOD(9,55000000000, 500); /* 55s at 6x */
564	AssertCompile(RT_ELEMENTS(pVM->tm.s.aVirtualSyncCatchUpPeriods) == 10);
565	#undef TM_CFG_PERIOD
566
567	/*
568	* Configure real world time (UTC).
569	*/
570	/** @cfgm{/TM/UTCOffset, int64_t, ns, INT64_MIN, INT64_MAX, 0}
571	* The UTC offset. This is used to put the guest back or forwards in time. */
572	rc = CFGMR3QueryS64(pCfgHandle, "UTCOffset", &pVM->tm.s.offUTC);
573	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
574	pVM->tm.s.offUTC = 0; /* ns */
575	else if (RT_FAILURE(rc))
576	return VMSetError(pVM, rc, RT_SRC_POS,
577	N_("Configuration error: Failed to querying 64-bit integer value \"UTCOffset\""));
578
579	/** @cfgm{/TM/UTCTouchFileOnJump, string, none}
580	* File to be written to everytime the host time jumps. */
581	rc = CFGMR3QueryStringAlloc(pCfgHandle, "UTCTouchFileOnJump", &pVM->tm.s.pszUtcTouchFileOnJump);
582	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
583	pVM->tm.s.pszUtcTouchFileOnJump = NULL;
584	else if (RT_FAILURE(rc))
585	return VMSetError(pVM, rc, RT_SRC_POS,
586	N_("Configuration error: Failed to querying string value \"UTCTouchFileOnJump\""));
587
588	/*
589	* Setup the warp drive.
590	*/
591	/** @cfgm{/TM/WarpDrivePercentage, uint32_t, %, 0, 20000, 100}
592	* The warp drive percentage, 100% is normal speed. This is used to speed up
593	* or slow down the virtual clock, which can be useful for fast forwarding
594	* borring periods during tests. */
595	rc = CFGMR3QueryU32(pCfgHandle, "WarpDrivePercentage", &pVM->tm.s.u32VirtualWarpDrivePercentage);
596	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
597	rc = CFGMR3QueryU32(CFGMR3GetRoot(pVM), "WarpDrivePercentage", &pVM->tm.s.u32VirtualWarpDrivePercentage); /* legacy */
598	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
599	pVM->tm.s.u32VirtualWarpDrivePercentage = 100;
600	else if (RT_FAILURE(rc))
601	return VMSetError(pVM, rc, RT_SRC_POS,
602	N_("Configuration error: Failed to querying uint32_t value \"WarpDrivePercent\""));
603	else if ( pVM->tm.s.u32VirtualWarpDrivePercentage < 2
604	\|\| pVM->tm.s.u32VirtualWarpDrivePercentage > 20000)
605	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS,
606	N_("Configuration error: \"WarpDrivePercent\" = %RI32 is not in the range 2..20000"),
607	pVM->tm.s.u32VirtualWarpDrivePercentage);
608	pVM->tm.s.fVirtualWarpDrive = pVM->tm.s.u32VirtualWarpDrivePercentage != 100;
609	if (pVM->tm.s.fVirtualWarpDrive)
610	{
611	if (pVM->tm.s.enmTSCMode == TMTSCMODE_NATIVE_API)
612	LogRel(("TM: Warp-drive active, escept for TSC which is in NEM mode. u32VirtualWarpDrivePercentage=%RI32\n",
613	pVM->tm.s.u32VirtualWarpDrivePercentage));
614	else
615	{
616	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
617	LogRel(("TM: Warp-drive active. u32VirtualWarpDrivePercentage=%RI32\n", pVM->tm.s.u32VirtualWarpDrivePercentage));
618	}
619	}
620
621	/*
622	* Gather the Host Hz configuration values.
623	*/
624	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzMax", &pVM->tm.s.cHostHzMax, 20000);
625	if (RT_FAILURE(rc))
626	return VMSetError(pVM, rc, RT_SRC_POS,
627	N_("Configuration error: Failed to querying uint32_t value \"HostHzMax\""));
628
629	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzFudgeFactorTimerCpu", &pVM->tm.s.cPctHostHzFudgeFactorTimerCpu, 111);
630	if (RT_FAILURE(rc))
631	return VMSetError(pVM, rc, RT_SRC_POS,
632	N_("Configuration error: Failed to querying uint32_t value \"HostHzFudgeFactorTimerCpu\""));
633
634	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzFudgeFactorOtherCpu", &pVM->tm.s.cPctHostHzFudgeFactorOtherCpu, 110);
635	if (RT_FAILURE(rc))
636	return VMSetError(pVM, rc, RT_SRC_POS,
637	N_("Configuration error: Failed to querying uint32_t value \"HostHzFudgeFactorOtherCpu\""));
638
639	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzFudgeFactorCatchUp100", &pVM->tm.s.cPctHostHzFudgeFactorCatchUp100, 300);
640	if (RT_FAILURE(rc))
641	return VMSetError(pVM, rc, RT_SRC_POS,
642	N_("Configuration error: Failed to querying uint32_t value \"HostHzFudgeFactorCatchUp100\""));
643
644	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzFudgeFactorCatchUp200", &pVM->tm.s.cPctHostHzFudgeFactorCatchUp200, 250);
645	if (RT_FAILURE(rc))
646	return VMSetError(pVM, rc, RT_SRC_POS,
647	N_("Configuration error: Failed to querying uint32_t value \"HostHzFudgeFactorCatchUp200\""));
648
649	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzFudgeFactorCatchUp400", &pVM->tm.s.cPctHostHzFudgeFactorCatchUp400, 200);
650	if (RT_FAILURE(rc))
651	return VMSetError(pVM, rc, RT_SRC_POS,
652	N_("Configuration error: Failed to querying uint32_t value \"HostHzFudgeFactorCatchUp400\""));
653
654	/*
655	* Finally, setup and report.
656	*/
657	pVM->tm.s.enmOriginalTSCMode = pVM->tm.s.enmTSCMode;
658	#if !defined(VBOX_VMM_TARGET_ARMV8)
659	CPUMR3SetCR4Feature(pVM, X86_CR4_TSD, ~X86_CR4_TSD);
660	#endif
661	LogRel(("TM: cTSCTicksPerSecond=%'RU64 (%#RX64) enmTSCMode=%d (%s) TSCMultiplier=%u\n"
662	"TM: cTSCTicksPerSecondHost=%'RU64 (%#RX64)\n"
663	"TM: TSCTiedToExecution=%RTbool TSCNotTiedToHalt=%RTbool\n",
664	pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.enmTSCMode, tmR3GetTSCModeName(pVM), pVM->tm.s.u8TSCMultiplier,
665	pVM->tm.s.cTSCTicksPerSecondHost, pVM->tm.s.cTSCTicksPerSecondHost,
666	pVM->tm.s.fTSCTiedToExecution, pVM->tm.s.fTSCNotTiedToHalt));
667
668	/*
669	* Start the timer (guard against REM not yielding).
670	*/
671	/** @cfgm{/TM/TimerMillies, uint32_t, ms, 1, 1000, 10}
672	* The watchdog timer interval. */
673	uint32_t u32Millies;
674	rc = CFGMR3QueryU32(pCfgHandle, "TimerMillies", &u32Millies);
675	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
676	u32Millies = VM_IS_HM_ENABLED(pVM) ? 1000 : 10;
677	else if (RT_FAILURE(rc))
678	return VMSetError(pVM, rc, RT_SRC_POS,
679	N_("Configuration error: Failed to query uint32_t value \"TimerMillies\""));
680	rc = RTTimerCreate(&pVM->tm.s.pTimer, u32Millies, tmR3TimerCallback, pVM);
681	if (RT_FAILURE(rc))
682	{
683	AssertMsgFailed(("Failed to create timer, u32Millies=%d rc=%Rrc.\n", u32Millies, rc));
684	return rc;
685	}
686	Log(("TM: Created timer %p firing every %d milliseconds\n", pVM->tm.s.pTimer, u32Millies));
687	pVM->tm.s.u32TimerMillies = u32Millies;
688
689	/*
690	* Register saved state.
691	*/
692	rc = SSMR3RegisterInternal(pVM, "tm", 1, TM_SAVED_STATE_VERSION, sizeof(uint64_t) * 8,
693	NULL, NULL, NULL,
694	NULL, tmR3Save, NULL,
695	NULL, tmR3Load, NULL);
696	if (RT_FAILURE(rc))
697	return rc;
698
699	/*
700	* Register statistics.
701	*/
702	STAM_REL_REG_USED(pVM,(void*)&pVM->tm.s.VirtualGetRawData.c1nsSteps,STAMTYPE_U32, "/TM/R3/1nsSteps", STAMUNIT_OCCURENCES, "Virtual time 1ns steps (due to TSC / GIP variations).");
703	STAM_REL_REG_USED(pVM,(void*)&pVM->tm.s.VirtualGetRawData.cBadPrev, STAMTYPE_U32, "/TM/R3/cBadPrev", STAMUNIT_OCCURENCES, "Times the previous virtual time was considered erratic (shouldn't ever happen).");
704	#if 0 /** @todo retreive from ring-0 */
705	STAM_REL_REG_USED(pVM,(void*)&pVM->tm.s.VirtualGetRawDataR0.c1nsSteps,STAMTYPE_U32, "/TM/R0/1nsSteps", STAMUNIT_OCCURENCES, "Virtual time 1ns steps (due to TSC / GIP variations).");
706	STAM_REL_REG_USED(pVM,(void*)&pVM->tm.s.VirtualGetRawDataR0.cBadPrev, STAMTYPE_U32, "/TM/R0/cBadPrev", STAMUNIT_OCCURENCES, "Times the previous virtual time was considered erratic (shouldn't ever happen).");
707	#endif
708	STAM_REL_REG( pVM,(void*)&pVM->tm.s.offVirtualSync, STAMTYPE_U64, "/TM/VirtualSync/CurrentOffset", STAMUNIT_NS, "The current offset. (subtract GivenUp to get the lag)");
709	STAM_REL_REG_USED(pVM,(void*)&pVM->tm.s.offVirtualSyncGivenUp, STAMTYPE_U64, "/TM/VirtualSync/GivenUp", STAMUNIT_NS, "Nanoseconds of the 'CurrentOffset' that's been given up and won't ever be attempted caught up with.");
710	STAM_REL_REG( pVM,(void*)&pVM->tm.s.HzHint.s.uMax, STAMTYPE_U32, "/TM/MaxHzHint", STAMUNIT_HZ, "Max guest timer frequency hint.");
711	for (uint32_t i = 0; i < RT_ELEMENTS(pVM->tm.s.aTimerQueues); i++)
712	{
713	rc = STAMR3RegisterF(pVM, (void *)&pVM->tm.s.aTimerQueues[i].uMaxHzHint, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, STAMUNIT_HZ,
714	"", "/TM/MaxHzHint/%s", pVM->tm.s.aTimerQueues[i].szName);
715	AssertRC(rc);
716	}
717
718	#ifdef VBOX_WITH_STATISTICS
719	STAM_REG_USED(pVM,(void *)&pVM->tm.s.VirtualGetRawData.cExpired, STAMTYPE_U32, "/TM/R3/cExpired", STAMUNIT_OCCURENCES, "Times the TSC interval expired (overlaps 1ns steps).");
720	STAM_REG_USED(pVM,(void *)&pVM->tm.s.VirtualGetRawData.cUpdateRaces,STAMTYPE_U32, "/TM/R3/cUpdateRaces", STAMUNIT_OCCURENCES, "Thread races when updating the previous timestamp.");
721	# if 0 /** @todo retreive from ring-0 */
722	STAM_REG_USED(pVM,(void *)&pVM->tm.s.VirtualGetRawDataR0.cExpired, STAMTYPE_U32, "/TM/R0/cExpired", STAMUNIT_OCCURENCES, "Times the TSC interval expired (overlaps 1ns steps).");
723	STAM_REG_USED(pVM,(void *)&pVM->tm.s.VirtualGetRawDataR0.cUpdateRaces,STAMTYPE_U32, "/TM/R0/cUpdateRaces", STAMUNIT_OCCURENCES, "Thread races when updating the previous timestamp.");
724	# endif
725	STAM_REG(pVM, &pVM->tm.s.StatDoQueues, STAMTYPE_PROFILE, "/TM/DoQueues", STAMUNIT_TICKS_PER_CALL, "Profiling timer TMR3TimerQueuesDo.");
726	STAM_REG(pVM, &pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL].StatDo, STAMTYPE_PROFILE, "/TM/DoQueues/Virtual", STAMUNIT_TICKS_PER_CALL, "Time spent on the virtual clock queue.");
727	STAM_REG(pVM, &pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC].StatDo,STAMTYPE_PROFILE,"/TM/DoQueues/VirtualSync", STAMUNIT_TICKS_PER_CALL, "Time spent on the virtual sync clock queue.");
728	STAM_REG(pVM, &pVM->tm.s.aTimerQueues[TMCLOCK_REAL].StatDo, STAMTYPE_PROFILE, "/TM/DoQueues/Real", STAMUNIT_TICKS_PER_CALL, "Time spent on the real clock queue.");
729
730	STAM_REG(pVM, &pVM->tm.s.StatPoll, STAMTYPE_COUNTER, "/TM/Poll", STAMUNIT_OCCURENCES, "TMTimerPoll calls.");
731	STAM_REG(pVM, &pVM->tm.s.StatPollAlreadySet, STAMTYPE_COUNTER, "/TM/Poll/AlreadySet", STAMUNIT_OCCURENCES, "TMTimerPoll calls where the FF was already set.");
732	STAM_REG(pVM, &pVM->tm.s.StatPollELoop, STAMTYPE_COUNTER, "/TM/Poll/ELoop", STAMUNIT_OCCURENCES, "Times TMTimerPoll has given up getting a consistent virtual sync data set.");
733	STAM_REG(pVM, &pVM->tm.s.StatPollMiss, STAMTYPE_COUNTER, "/TM/Poll/Miss", STAMUNIT_OCCURENCES, "TMTimerPoll calls where nothing had expired.");
734	STAM_REG(pVM, &pVM->tm.s.StatPollRunning, STAMTYPE_COUNTER, "/TM/Poll/Running", STAMUNIT_OCCURENCES, "TMTimerPoll calls where the queues were being run.");
735	STAM_REG(pVM, &pVM->tm.s.StatPollSimple, STAMTYPE_COUNTER, "/TM/Poll/Simple", STAMUNIT_OCCURENCES, "TMTimerPoll calls where we could take the simple path.");
736	STAM_REG(pVM, &pVM->tm.s.StatPollVirtual, STAMTYPE_COUNTER, "/TM/Poll/HitsVirtual", STAMUNIT_OCCURENCES, "The number of times TMTimerPoll found an expired TMCLOCK_VIRTUAL queue.");
737	STAM_REG(pVM, &pVM->tm.s.StatPollVirtualSync, STAMTYPE_COUNTER, "/TM/Poll/HitsVirtualSync", STAMUNIT_OCCURENCES, "The number of times TMTimerPoll found an expired TMCLOCK_VIRTUAL_SYNC queue.");
738
739	STAM_REG(pVM, &pVM->tm.s.StatPostponedR3, STAMTYPE_COUNTER, "/TM/PostponedR3", STAMUNIT_OCCURENCES, "Postponed due to unschedulable state, in ring-3.");
740	STAM_REG(pVM, &pVM->tm.s.StatPostponedRZ, STAMTYPE_COUNTER, "/TM/PostponedRZ", STAMUNIT_OCCURENCES, "Postponed due to unschedulable state, in ring-0 / RC.");
741
742	STAM_REG(pVM, &pVM->tm.s.StatScheduleOneR3, STAMTYPE_PROFILE, "/TM/ScheduleOneR3", STAMUNIT_TICKS_PER_CALL, "Profiling the scheduling of one queue during a TMTimer* call in EMT.");
743	STAM_REG(pVM, &pVM->tm.s.StatScheduleOneRZ, STAMTYPE_PROFILE, "/TM/ScheduleOneRZ", STAMUNIT_TICKS_PER_CALL, "Profiling the scheduling of one queue during a TMTimer* call in EMT.");
744	STAM_REG(pVM, &pVM->tm.s.StatScheduleSetFF, STAMTYPE_COUNTER, "/TM/ScheduleSetFF", STAMUNIT_OCCURENCES, "The number of times the timer FF was set instead of doing scheduling.");
745
746	STAM_REG(pVM, &pVM->tm.s.StatTimerSet, STAMTYPE_COUNTER, "/TM/TimerSet", STAMUNIT_OCCURENCES, "Calls, except virtual sync timers");
747	STAM_REG(pVM, &pVM->tm.s.StatTimerSetOpt, STAMTYPE_COUNTER, "/TM/TimerSet/Opt", STAMUNIT_OCCURENCES, "Optimized path taken.");
748	STAM_REG(pVM, &pVM->tm.s.StatTimerSetR3, STAMTYPE_PROFILE, "/TM/TimerSet/R3", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerSet calls made in ring-3.");
749	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRZ, STAMTYPE_PROFILE, "/TM/TimerSet/RZ", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerSet calls made in ring-0 / RC.");
750	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStActive, STAMTYPE_COUNTER, "/TM/TimerSet/StActive", STAMUNIT_OCCURENCES, "ACTIVE");
751	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStExpDeliver, STAMTYPE_COUNTER, "/TM/TimerSet/StExpDeliver", STAMUNIT_OCCURENCES, "EXPIRED_DELIVER");
752	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStOther, STAMTYPE_COUNTER, "/TM/TimerSet/StOther", STAMUNIT_OCCURENCES, "Other states");
753	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStPendStop, STAMTYPE_COUNTER, "/TM/TimerSet/StPendStop", STAMUNIT_OCCURENCES, "PENDING_STOP");
754	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStPendStopSched, STAMTYPE_COUNTER, "/TM/TimerSet/StPendStopSched", STAMUNIT_OCCURENCES, "PENDING_STOP_SCHEDULE");
755	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStPendSched, STAMTYPE_COUNTER, "/TM/TimerSet/StPendSched", STAMUNIT_OCCURENCES, "PENDING_SCHEDULE");
756	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStPendResched, STAMTYPE_COUNTER, "/TM/TimerSet/StPendResched", STAMUNIT_OCCURENCES, "PENDING_RESCHEDULE");
757	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStStopped, STAMTYPE_COUNTER, "/TM/TimerSet/StStopped", STAMUNIT_OCCURENCES, "STOPPED");
758
759	STAM_REG(pVM, &pVM->tm.s.StatTimerSetVs, STAMTYPE_COUNTER, "/TM/TimerSetVs", STAMUNIT_OCCURENCES, "TMTimerSet calls on virtual sync timers");
760	STAM_REG(pVM, &pVM->tm.s.StatTimerSetVsR3, STAMTYPE_PROFILE, "/TM/TimerSetVs/R3", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerSet calls made in ring-3 on virtual sync timers.");
761	STAM_REG(pVM, &pVM->tm.s.StatTimerSetVsRZ, STAMTYPE_PROFILE, "/TM/TimerSetVs/RZ", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerSet calls made in ring-0 / RC on virtual sync timers.");
762	STAM_REG(pVM, &pVM->tm.s.StatTimerSetVsStActive, STAMTYPE_COUNTER, "/TM/TimerSetVs/StActive", STAMUNIT_OCCURENCES, "ACTIVE");
763	STAM_REG(pVM, &pVM->tm.s.StatTimerSetVsStExpDeliver, STAMTYPE_COUNTER, "/TM/TimerSetVs/StExpDeliver", STAMUNIT_OCCURENCES, "EXPIRED_DELIVER");
764	STAM_REG(pVM, &pVM->tm.s.StatTimerSetVsStStopped, STAMTYPE_COUNTER, "/TM/TimerSetVs/StStopped", STAMUNIT_OCCURENCES, "STOPPED");
765
766	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelative, STAMTYPE_COUNTER, "/TM/TimerSetRelative", STAMUNIT_OCCURENCES, "Calls, except virtual sync timers");
767	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeOpt, STAMTYPE_COUNTER, "/TM/TimerSetRelative/Opt", STAMUNIT_OCCURENCES, "Optimized path taken.");
768	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeR3, STAMTYPE_PROFILE, "/TM/TimerSetRelative/R3", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerSetRelative calls made in ring-3 (sans virtual sync).");
769	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeRZ, STAMTYPE_PROFILE, "/TM/TimerSetRelative/RZ", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerSetReltaive calls made in ring-0 / RC (sans virtual sync).");
770	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStActive, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StActive", STAMUNIT_OCCURENCES, "ACTIVE");
771	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStExpDeliver, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StExpDeliver", STAMUNIT_OCCURENCES, "EXPIRED_DELIVER");
772	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStOther, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StOther", STAMUNIT_OCCURENCES, "Other states");
773	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStPendStop, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StPendStop", STAMUNIT_OCCURENCES, "PENDING_STOP");
774	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStPendStopSched, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StPendStopSched",STAMUNIT_OCCURENCES, "PENDING_STOP_SCHEDULE");
775	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStPendSched, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StPendSched", STAMUNIT_OCCURENCES, "PENDING_SCHEDULE");
776	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStPendResched, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StPendResched", STAMUNIT_OCCURENCES, "PENDING_RESCHEDULE");
777	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStStopped, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StStopped", STAMUNIT_OCCURENCES, "STOPPED");
778
779	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeVs, STAMTYPE_COUNTER, "/TM/TimerSetRelativeVs", STAMUNIT_OCCURENCES, "TMTimerSetRelative calls on virtual sync timers");
780	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeVsR3, STAMTYPE_PROFILE, "/TM/TimerSetRelativeVs/R3", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerSetRelative calls made in ring-3 on virtual sync timers.");
781	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeVsRZ, STAMTYPE_PROFILE, "/TM/TimerSetRelativeVs/RZ", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerSetReltaive calls made in ring-0 / RC on virtual sync timers.");
782	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeVsStActive, STAMTYPE_COUNTER, "/TM/TimerSetRelativeVs/StActive", STAMUNIT_OCCURENCES, "ACTIVE");
783	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeVsStExpDeliver, STAMTYPE_COUNTER, "/TM/TimerSetRelativeVs/StExpDeliver", STAMUNIT_OCCURENCES, "EXPIRED_DELIVER");
784	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeVsStStopped, STAMTYPE_COUNTER, "/TM/TimerSetRelativeVs/StStopped", STAMUNIT_OCCURENCES, "STOPPED");
785
786	STAM_REG(pVM, &pVM->tm.s.StatTimerStopR3, STAMTYPE_PROFILE, "/TM/TimerStopR3", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerStop calls made in ring-3.");
787	STAM_REG(pVM, &pVM->tm.s.StatTimerStopRZ, STAMTYPE_PROFILE, "/TM/TimerStopRZ", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerStop calls made in ring-0 / RC.");
788
789	STAM_REG(pVM, &pVM->tm.s.StatVirtualGet, STAMTYPE_COUNTER, "/TM/VirtualGet", STAMUNIT_OCCURENCES, "The number of times TMTimerGet was called when the clock was running.");
790	STAM_REG(pVM, &pVM->tm.s.StatVirtualGetSetFF, STAMTYPE_COUNTER, "/TM/VirtualGetSetFF", STAMUNIT_OCCURENCES, "Times we set the FF when calling TMTimerGet.");
791	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGet, STAMTYPE_COUNTER, "/TM/VirtualSyncGet", STAMUNIT_OCCURENCES, "The number of times tmVirtualSyncGetEx was called.");
792	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGetAdjLast, STAMTYPE_COUNTER, "/TM/VirtualSyncGet/AdjLast", STAMUNIT_OCCURENCES, "Times we've adjusted against the last returned time stamp .");
793	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGetELoop, STAMTYPE_COUNTER, "/TM/VirtualSyncGet/ELoop", STAMUNIT_OCCURENCES, "Times tmVirtualSyncGetEx has given up getting a consistent virtual sync data set.");
794	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGetExpired, STAMTYPE_COUNTER, "/TM/VirtualSyncGet/Expired", STAMUNIT_OCCURENCES, "Times tmVirtualSyncGetEx encountered an expired timer stopping the clock.");
795	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGetLocked, STAMTYPE_COUNTER, "/TM/VirtualSyncGet/Locked", STAMUNIT_OCCURENCES, "Times we successfully acquired the lock in tmVirtualSyncGetEx.");
796	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGetLockless, STAMTYPE_COUNTER, "/TM/VirtualSyncGet/Lockless", STAMUNIT_OCCURENCES, "Times tmVirtualSyncGetEx returned without needing to take the lock.");
797	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGetSetFF, STAMTYPE_COUNTER, "/TM/VirtualSyncGet/SetFF", STAMUNIT_OCCURENCES, "Times we set the FF when calling tmVirtualSyncGetEx.");
798	STAM_REG(pVM, &pVM->tm.s.StatVirtualPause, STAMTYPE_COUNTER, "/TM/VirtualPause", STAMUNIT_OCCURENCES, "The number of times TMR3TimerPause was called.");
799	STAM_REG(pVM, &pVM->tm.s.StatVirtualResume, STAMTYPE_COUNTER, "/TM/VirtualResume", STAMUNIT_OCCURENCES, "The number of times TMR3TimerResume was called.");
800
801	STAM_REG(pVM, &pVM->tm.s.StatTimerCallbackSetFF, STAMTYPE_COUNTER, "/TM/CallbackSetFF", STAMUNIT_OCCURENCES, "The number of times the timer callback set FF.");
802	STAM_REG(pVM, &pVM->tm.s.StatTimerCallback, STAMTYPE_COUNTER, "/TM/Callback", STAMUNIT_OCCURENCES, "The number of times the timer callback is invoked.");
803
804	STAM_REG(pVM, &pVM->tm.s.StatTSCCatchupLE010, STAMTYPE_COUNTER, "/TM/TSC/Intercept/CatchupLE010", STAMUNIT_OCCURENCES, "In catch-up mode, 10% or lower.");
805	STAM_REG(pVM, &pVM->tm.s.StatTSCCatchupLE025, STAMTYPE_COUNTER, "/TM/TSC/Intercept/CatchupLE025", STAMUNIT_OCCURENCES, "In catch-up mode, 25%-11%.");
806	STAM_REG(pVM, &pVM->tm.s.StatTSCCatchupLE100, STAMTYPE_COUNTER, "/TM/TSC/Intercept/CatchupLE100", STAMUNIT_OCCURENCES, "In catch-up mode, 100%-26%.");
807	STAM_REG(pVM, &pVM->tm.s.StatTSCCatchupOther, STAMTYPE_COUNTER, "/TM/TSC/Intercept/CatchupOther", STAMUNIT_OCCURENCES, "In catch-up mode, > 100%.");
808	STAM_REG(pVM, &pVM->tm.s.StatTSCNotFixed, STAMTYPE_COUNTER, "/TM/TSC/Intercept/NotFixed", STAMUNIT_OCCURENCES, "TSC is not fixed, it may run at variable speed.");
809	STAM_REG(pVM, &pVM->tm.s.StatTSCNotTicking, STAMTYPE_COUNTER, "/TM/TSC/Intercept/NotTicking", STAMUNIT_OCCURENCES, "TSC is not ticking.");
810	STAM_REG(pVM, &pVM->tm.s.StatTSCSyncNotTicking, STAMTYPE_COUNTER, "/TM/TSC/Intercept/SyncNotTicking", STAMUNIT_OCCURENCES, "VirtualSync isn't ticking.");
811	STAM_REG(pVM, &pVM->tm.s.StatTSCWarp, STAMTYPE_COUNTER, "/TM/TSC/Intercept/Warp", STAMUNIT_OCCURENCES, "Warpdrive is active.");
812	STAM_REG(pVM, &pVM->tm.s.StatTSCSet, STAMTYPE_COUNTER, "/TM/TSC/Sets", STAMUNIT_OCCURENCES, "Calls to TMCpuTickSet.");
813	STAM_REG(pVM, &pVM->tm.s.StatTSCUnderflow, STAMTYPE_COUNTER, "/TM/TSC/Underflow", STAMUNIT_OCCURENCES, "TSC underflow; corrected with last seen value .");
814	STAM_REG(pVM, &pVM->tm.s.StatVirtualPause, STAMTYPE_COUNTER, "/TM/TSC/Pause", STAMUNIT_OCCURENCES, "The number of times the TSC was paused.");
815	STAM_REG(pVM, &pVM->tm.s.StatVirtualResume, STAMTYPE_COUNTER, "/TM/TSC/Resume", STAMUNIT_OCCURENCES, "The number of times the TSC was resumed.");
816	#endif /* VBOX_WITH_STATISTICS */
817
818	for (VMCPUID i = 0; i < pVM->cCpus; i++)
819	{
820	PVMCPU pVCpu = pVM->apCpusR3[i];
821	STAMR3RegisterF(pVM, &pVCpu->tm.s.offTSCRawSrc, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS, "TSC offset relative the raw source", "/TM/TSC/offCPU%u", i);
822	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
823	# if defined(VBOX_WITH_STATISTICS) \|\| defined(VBOX_WITH_NS_ACCOUNTING_STATS)
824	STAMR3RegisterF(pVM, &pVCpu->tm.s.StatNsTotal, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_NS, "Resettable: Total CPU run time.", "/TM/CPU/%02u", i);
825	STAMR3RegisterF(pVM, &pVCpu->tm.s.StatNsExecuting, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_NS_PER_OCCURENCE, "Resettable: Time spent executing guest code.", "/TM/CPU/%02u/PrfExecuting", i);
826	STAMR3RegisterF(pVM, &pVCpu->tm.s.StatNsExecLong, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_NS_PER_OCCURENCE, "Resettable: Time spent executing guest code - long hauls.", "/TM/CPU/%02u/PrfExecLong", i);
827	STAMR3RegisterF(pVM, &pVCpu->tm.s.StatNsExecShort, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_NS_PER_OCCURENCE, "Resettable: Time spent executing guest code - short stretches.", "/TM/CPU/%02u/PrfExecShort", i);
828	STAMR3RegisterF(pVM, &pVCpu->tm.s.StatNsExecTiny, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_NS_PER_OCCURENCE, "Resettable: Time spent executing guest code - tiny bits.", "/TM/CPU/%02u/PrfExecTiny", i);
829	STAMR3RegisterF(pVM, &pVCpu->tm.s.StatNsHalted, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_NS_PER_OCCURENCE, "Resettable: Time spent halted.", "/TM/CPU/%02u/PrfHalted", i);
830	STAMR3RegisterF(pVM, &pVCpu->tm.s.StatNsOther, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_NS_PER_OCCURENCE, "Resettable: Time spent in the VMM or preempted.", "/TM/CPU/%02u/PrfOther", i);
831	# endif
832	STAMR3RegisterF(pVM, &pVCpu->tm.s.cNsTotalStat, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_NS, "Total CPU run time.", "/TM/CPU/%02u/cNsTotal", i);
833	STAMR3RegisterF(pVM, &pVCpu->tm.s.cNsExecuting, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_NS, "Time spent executing guest code.", "/TM/CPU/%02u/cNsExecuting", i);
834	STAMR3RegisterF(pVM, &pVCpu->tm.s.cNsHalted, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_NS, "Time spent halted.", "/TM/CPU/%02u/cNsHalted", i);
835	STAMR3RegisterF(pVM, &pVCpu->tm.s.cNsOtherStat, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_NS, "Time spent in the VMM or preempted.", "/TM/CPU/%02u/cNsOther", i);
836	STAMR3RegisterF(pVM, &pVCpu->tm.s.cPeriodsExecuting, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT, "Times executed guest code.", "/TM/CPU/%02u/cPeriodsExecuting", i);
837	STAMR3RegisterF(pVM, &pVCpu->tm.s.cPeriodsHalted, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT, "Times halted.", "/TM/CPU/%02u/cPeriodsHalted", i);
838	STAMR3RegisterF(pVM, &pVCpu->tm.s.CpuLoad.cPctExecuting, STAMTYPE_U8, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "Time spent executing guest code recently.", "/TM/CPU/%02u/pctExecuting", i);
839	STAMR3RegisterF(pVM, &pVCpu->tm.s.CpuLoad.cPctHalted, STAMTYPE_U8, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "Time spent halted recently.", "/TM/CPU/%02u/pctHalted", i);
840	STAMR3RegisterF(pVM, &pVCpu->tm.s.CpuLoad.cPctOther, STAMTYPE_U8, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "Time spent in the VMM or preempted recently.", "/TM/CPU/%02u/pctOther", i);
841	#endif
842	}
843	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
844	STAMR3RegisterF(pVM, &pVM->tm.s.CpuLoad.cPctExecuting, STAMTYPE_U8, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "Time spent executing guest code recently.", "/TM/CPU/pctExecuting");
845	STAMR3RegisterF(pVM, &pVM->tm.s.CpuLoad.cPctHalted, STAMTYPE_U8, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "Time spent halted recently.", "/TM/CPU/pctHalted");
846	STAMR3RegisterF(pVM, &pVM->tm.s.CpuLoad.cPctOther, STAMTYPE_U8, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "Time spent in the VMM or preempted recently.", "/TM/CPU/pctOther");
847	#endif
848
849	#ifdef VBOX_WITH_STATISTICS
850	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncCatchup, STAMTYPE_PROFILE_ADV, "/TM/VirtualSync/CatchUp", STAMUNIT_TICKS_PER_OCCURENCE, "Counting and measuring the times spent catching up.");
851	STAM_REG(pVM, (void *)&pVM->tm.s.fVirtualSyncCatchUp, STAMTYPE_U8, "/TM/VirtualSync/CatchUpActive", STAMUNIT_NONE, "Catch-Up active indicator.");
852	STAM_REG(pVM, (void *)&pVM->tm.s.u32VirtualSyncCatchUpPercentage, STAMTYPE_U32, "/TM/VirtualSync/CatchUpPercentage", STAMUNIT_PCT, "The catch-up percentage. (+100/100 to get clock multiplier)");
853	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncFF, STAMTYPE_PROFILE, "/TM/VirtualSync/FF", STAMUNIT_TICKS_PER_OCCURENCE, "Time spent in TMR3VirtualSyncFF by all but the dedicate timer EMT.");
854	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGiveUp, STAMTYPE_COUNTER, "/TM/VirtualSync/GiveUp", STAMUNIT_OCCURENCES, "Times the catch-up was abandoned.");
855	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGiveUpBeforeStarting, STAMTYPE_COUNTER, "/TM/VirtualSync/GiveUpBeforeStarting",STAMUNIT_OCCURENCES, "Times the catch-up was abandoned before even starting. (Typically debugging++.)");
856	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncRun, STAMTYPE_COUNTER, "/TM/VirtualSync/Run", STAMUNIT_OCCURENCES, "Times the virtual sync timer queue was considered.");
857	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncRunRestart, STAMTYPE_COUNTER, "/TM/VirtualSync/Run/Restarts", STAMUNIT_OCCURENCES, "Times the clock was restarted after a run.");
858	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncRunStop, STAMTYPE_COUNTER, "/TM/VirtualSync/Run/Stop", STAMUNIT_OCCURENCES, "Times the clock was stopped when calculating the current time before examining the timers.");
859	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncRunStoppedAlready, STAMTYPE_COUNTER, "/TM/VirtualSync/Run/StoppedAlready", STAMUNIT_OCCURENCES, "Times the clock was already stopped elsewhere (TMVirtualSyncGet).");
860	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncRunSlack, STAMTYPE_PROFILE, "/TM/VirtualSync/Run/Slack", STAMUNIT_NS_PER_OCCURENCE, "The scheduling slack. (Catch-up handed out when running timers.)");
861	for (unsigned i = 0; i < RT_ELEMENTS(pVM->tm.s.aVirtualSyncCatchUpPeriods); i++)
862	{
863	STAMR3RegisterF(pVM, &pVM->tm.s.aVirtualSyncCatchUpPeriods[i].u32Percentage, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "The catch-up percentage.", "/TM/VirtualSync/Periods/%u", i);
864	STAMR3RegisterF(pVM, &pVM->tm.s.aStatVirtualSyncCatchupAdjust[i], STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Times adjusted to this period.", "/TM/VirtualSync/Periods/%u/Adjust", i);
865	STAMR3RegisterF(pVM, &pVM->tm.s.aStatVirtualSyncCatchupInitial[i], STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Times started in this period.", "/TM/VirtualSync/Periods/%u/Initial", i);
866	STAMR3RegisterF(pVM, &pVM->tm.s.aVirtualSyncCatchUpPeriods[i].u64Start, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_NS, "Start of this period (lag).", "/TM/VirtualSync/Periods/%u/Start", i);
867	}
868	#endif /* VBOX_WITH_STATISTICS */
869
870	/*
871	* Register info handlers.
872	*/
873	DBGFR3InfoRegisterInternalEx(pVM, "timers", "Dumps all timers. No arguments.", tmR3TimerInfo, DBGFINFO_FLAGS_RUN_ON_EMT);
874	DBGFR3InfoRegisterInternalEx(pVM, "activetimers", "Dumps active all timers. No arguments.", tmR3TimerInfoActive, DBGFINFO_FLAGS_RUN_ON_EMT);
875	DBGFR3InfoRegisterInternalEx(pVM, "clocks", "Display the time of the various clocks.", tmR3InfoClocks, DBGFINFO_FLAGS_RUN_ON_EMT);
876	DBGFR3InfoRegisterInternalArgv(pVM, "cpuload", "Display the CPU load stats (--help for details).", tmR3InfoCpuLoad, 0);
877
878	return VINF_SUCCESS;
879	}
880
881
882	/**
883	* Checks if the host CPU has a fixed TSC frequency.
884	*
885	* @returns true if it has, false if it hasn't.
886	*
887	* @remarks This test doesn't bother with very old CPUs that don't do power
888	* management or any other stuff that might influence the TSC rate.
889	* This isn't currently relevant.
890	*/
891	static bool tmR3HasFixedTSC(PVM pVM)
892	{
893	/*
894	* ASSUME that if the GIP is in invariant TSC mode, it's because the CPU
895	* actually has invariant TSC.
896	*
897	* In driverless mode we just assume sync TSC for now regardless of what
898	* the case actually is.
899	*/
900	PSUPGLOBALINFOPAGE const pGip = g_pSUPGlobalInfoPage;
901	SUPGIPMODE const enmGipMode = pGip ? (SUPGIPMODE)pGip->u32Mode : SUPGIPMODE_INVARIANT_TSC;
902	if (enmGipMode == SUPGIPMODE_INVARIANT_TSC)
903	return true;
904
905	#if defined(RT_ARCH_AMD64) \|\| defined(RT_ARCH_X86)
906	/*
907	* Go by features and model info from the CPUID instruction.
908	*/
909	if (ASMHasCpuId())
910	{
911	uint32_t uEAX, uEBX, uECX, uEDX;
912
913	/*
914	* By feature. (Used to be AMD specific, intel seems to have picked it up.)
915	*/
916	ASMCpuId(0x80000000, &uEAX, &uEBX, &uECX, &uEDX);
917	if (uEAX >= 0x80000007 && RTX86IsValidExtRange(uEAX))
918	{
919	ASMCpuId(0x80000007, &uEAX, &uEBX, &uECX, &uEDX);
920	if ( (uEDX & X86_CPUID_AMD_ADVPOWER_EDX_TSCINVAR) /* TscInvariant */
921	&& enmGipMode != SUPGIPMODE_ASYNC_TSC) /* No fixed tsc if the gip timer is in async mode. */
922	return true;
923	}
924
925	/*
926	* By model.
927	*/
928	if (CPUMGetHostCpuVendor(pVM) == CPUMCPUVENDOR_AMD)
929	{
930	/*
931	* AuthenticAMD - Check for APM support and that TscInvariant is set.
932	*
933	* This test isn't correct with respect to fixed/non-fixed TSC and
934	* older models, but this isn't relevant since the result is currently
935	* only used for making a decision on AMD-V models.
936	*/
937	# if 0 /* Promoted to generic */
938	ASMCpuId(0x80000000, &uEAX, &uEBX, &uECX, &uEDX);
939	if (uEAX >= 0x80000007)
940	{
941	ASMCpuId(0x80000007, &uEAX, &uEBX, &uECX, &uEDX);
942	if ( (uEDX & X86_CPUID_AMD_ADVPOWER_EDX_TSCINVAR) /* TscInvariant */
943	&& ( enmGipMode == SUPGIPMODE_SYNC_TSC /* No fixed tsc if the gip timer is in async mode. */
944	\|\| enmGipMode == SUPGIPMODE_INVARIANT_TSC))
945	return true;
946	}
947	# endif
948	}
949	else if (CPUMGetHostCpuVendor(pVM) == CPUMCPUVENDOR_INTEL)
950	{
951	/*
952	* GenuineIntel - Check the model number.
953	*
954	* This test is lacking in the same way and for the same reasons
955	* as the AMD test above.
956	*/
957	/** @todo use RTX86GetCpuFamily() and RTX86GetCpuModel() here. */
958	ASMCpuId(1, &uEAX, &uEBX, &uECX, &uEDX);
959	unsigned uModel = (uEAX >> 4) & 0x0f;
960	unsigned uFamily = (uEAX >> 8) & 0x0f;
961	if (uFamily == 0x0f)
962	uFamily += (uEAX >> 20) & 0xff;
963	if (uFamily >= 0x06)
964	uModel += ((uEAX >> 16) & 0x0f) << 4;
965	if ( (uFamily == 0x0f /P4/ && uModel >= 0x03)
966	\|\| (uFamily == 0x06 /P2/P3/ && uModel >= 0x0e))
967	return true;
968	}
969	else if (CPUMGetHostCpuVendor(pVM) == CPUMCPUVENDOR_VIA)
970	{
971	/*
972	* CentaurHauls - Check the model, family and stepping.
973	*
974	* This only checks for VIA CPU models Nano X2, Nano X3,
975	* Eden X2 and QuadCore.
976	*/
977	/** @todo use RTX86GetCpuFamily() and RTX86GetCpuModel() here. */
978	ASMCpuId(1, &uEAX, &uEBX, &uECX, &uEDX);
979	unsigned uStepping = (uEAX & 0x0f);
980	unsigned uModel = (uEAX >> 4) & 0x0f;
981	unsigned uFamily = (uEAX >> 8) & 0x0f;
982	if ( uFamily == 0x06
983	&& uModel == 0x0f
984	&& uStepping >= 0x0c
985	&& uStepping <= 0x0f)
986	return true;
987	}
988	else if (CPUMGetHostCpuVendor(pVM) == CPUMCPUVENDOR_SHANGHAI)
989	{
990	/*
991	* Shanghai - Check the model, family and stepping.
992	*/
993	/** @todo use RTX86GetCpuFamily() and RTX86GetCpuModel() here. */
994	ASMCpuId(1, &uEAX, &uEBX, &uECX, &uEDX);
995	unsigned uFamily = (uEAX >> 8) & 0x0f;
996	if ( uFamily == 0x06
997	\|\| uFamily == 0x07)
998	{
999	return true;
1000	}
1001	}
1002	}
1003
1004	# else /* !X86 && !AMD64 */
1005	RT_NOREF_PV(pVM);
1006	# endif /* !X86 && !AMD64 */
1007	return false;
1008	}
1009
1010
1011	/**
1012	* Calibrate the CPU tick.
1013	*
1014	* @returns Number of ticks per second.
1015	*/
1016	static uint64_t tmR3CalibrateTSC(void)
1017	{
1018	uint64_t u64Hz;
1019
1020	/*
1021	* Use GIP when available. Prefere the nominal one, no need to wait for it.
1022	*/
1023	PSUPGLOBALINFOPAGE pGip = g_pSUPGlobalInfoPage;
1024	if (pGip)
1025	{
1026	u64Hz = pGip->u64CpuHz;
1027	if (u64Hz < _1T && u64Hz > _1M)
1028	return u64Hz;
1029	AssertFailed(); /* This shouldn't happen. */
1030
1031	u64Hz = SUPGetCpuHzFromGip(pGip);
1032	if (u64Hz < _1T && u64Hz > _1M)
1033	return u64Hz;
1034
1035	AssertFailed(); /* This shouldn't happen. */
1036	}
1037	else
1038	Assert(SUPR3IsDriverless());
1039
1040	/* Call this once first to make sure it's initialized. */
1041	RTTimeNanoTS();
1042
1043	/*
1044	* Yield the CPU to increase our chances of getting a correct value.
1045	*/
1046	RTThreadYield(); /* Try avoid interruptions between TSC and NanoTS samplings. */
1047	static const unsigned s_auSleep[5] = { 50, 30, 30, 40, 40 };
1048	uint64_t au64Samples[5];
1049	unsigned i;
1050	for (i = 0; i < RT_ELEMENTS(au64Samples); i++)
1051	{
1052	RTMSINTERVAL cMillies;
1053	int cTries = 5;
1054	uint64_t u64Start = ASMReadTSC();
1055	uint64_t u64End;
1056	uint64_t StartTS = RTTimeNanoTS();
1057	uint64_t EndTS;
1058	do
1059	{
1060	RTThreadSleep(s_auSleep[i]);
1061	u64End = ASMReadTSC();
1062	EndTS = RTTimeNanoTS();
1063	cMillies = (RTMSINTERVAL)((EndTS - StartTS + 500000) / 1000000);
1064	} while ( cMillies == 0 /* the sleep may be interrupted... */
1065	\|\| (cMillies < 20 && --cTries > 0));
1066	uint64_t u64Diff = u64End - u64Start;
1067
1068	au64Samples[i] = (u64Diff * 1000) / cMillies;
1069	AssertMsg(cTries > 0, ("cMillies=%d i=%d\n", cMillies, i));
1070	}
1071
1072	/*
1073	* Discard the highest and lowest results and calculate the average.
1074	*/
1075	unsigned iHigh = 0;
1076	unsigned iLow = 0;
1077	for (i = 1; i < RT_ELEMENTS(au64Samples); i++)
1078	{
1079	if (au64Samples[i] < au64Samples[iLow])
1080	iLow = i;
1081	if (au64Samples[i] > au64Samples[iHigh])
1082	iHigh = i;
1083	}
1084	au64Samples[iLow] = 0;
1085	au64Samples[iHigh] = 0;
1086
1087	u64Hz = au64Samples[0];
1088	for (i = 1; i < RT_ELEMENTS(au64Samples); i++)
1089	u64Hz += au64Samples[i];
1090	u64Hz /= RT_ELEMENTS(au64Samples) - 2;
1091
1092	return u64Hz;
1093	}
1094
1095
1096	/**
1097	* Finalizes the TM initialization.
1098	*
1099	* @returns VBox status code.
1100	* @param pVM The cross context VM structure.
1101	*/
1102	VMM_INT_DECL(int) TMR3InitFinalize(PVM pVM)
1103	{
1104	int rc;
1105
1106	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
1107	/*
1108	* Create a timer for refreshing the CPU load stats.
1109	*/
1110	TMTIMERHANDLE hTimer;
1111	rc = TMR3TimerCreate(pVM, TMCLOCK_REAL, tmR3CpuLoadTimer, NULL, TMTIMER_FLAGS_NO_RING0, "CPU Load Timer", &hTimer);
1112	if (RT_SUCCESS(rc))
1113	rc = TMTimerSetMillies(pVM, hTimer, 1000);
1114	#endif
1115
1116	/*
1117	* GIM is now initialized. Determine if TSC mode switching is allowed (respecting CFGM override).
1118	*/
1119	pVM->tm.s.fTSCModeSwitchAllowed &= tmR3HasFixedTSC(pVM) && GIMIsEnabled(pVM);
1120	LogRel(("TM: TMR3InitFinalize: fTSCModeSwitchAllowed=%RTbool\n", pVM->tm.s.fTSCModeSwitchAllowed));
1121
1122	/*
1123	* Grow the virtual & real timer tables so we've got sufficient
1124	* space for dynamically created timers. We cannot allocate more
1125	* after ring-0 init completes.
1126	*/
1127	static struct { uint32_t idxQueue, cExtra; } s_aExtra[] = { {TMCLOCK_VIRTUAL, 128}, {TMCLOCK_REAL, 32} };
1128	for (uint32_t i = 0; i < RT_ELEMENTS(s_aExtra); i++)
1129	{
1130	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[s_aExtra[i].idxQueue];
1131	PDMCritSectRwEnterExcl(pVM, &pQueue->AllocLock, VERR_IGNORED);
1132	if (s_aExtra[i].cExtra > pQueue->cTimersFree)
1133	{
1134	uint32_t cTimersAlloc = pQueue->cTimersAlloc + s_aExtra[i].cExtra - pQueue->cTimersFree;
1135	rc = tmR3TimerQueueGrow(pVM, pQueue, cTimersAlloc);
1136	AssertLogRelMsgReturn(RT_SUCCESS(rc), ("rc=%Rrc cTimersAlloc=%u %s\n", rc, cTimersAlloc, pQueue->szName), rc);
1137	}
1138	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
1139	}
1140
1141	#ifdef VBOX_WITH_STATISTICS
1142	/*
1143	* Register timer statistics now that we've fixed the timer table sizes.
1144	*/
1145	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
1146	{
1147	pVM->tm.s.aTimerQueues[idxQueue].fCannotGrow = true;
1148	tmR3TimerQueueRegisterStats(pVM, &pVM->tm.s.aTimerQueues[idxQueue], UINT32_MAX);
1149	}
1150	#endif
1151
1152	return rc;
1153	}
1154
1155
1156	/**
1157	* Applies relocations to data and code managed by this
1158	* component. This function will be called at init and
1159	* whenever the VMM need to relocate it self inside the GC.
1160	*
1161	* @param pVM The cross context VM structure.
1162	* @param offDelta Relocation delta relative to old location.
1163	*/
1164	VMM_INT_DECL(void) TMR3Relocate(PVM pVM, RTGCINTPTR offDelta)
1165	{
1166	LogFlow(("TMR3Relocate\n"));
1167	RT_NOREF(pVM, offDelta);
1168	}
1169
1170
1171	/**
1172	* Terminates the TM.
1173	*
1174	* Termination means cleaning up and freeing all resources,
1175	* the VM it self is at this point powered off or suspended.
1176	*
1177	* @returns VBox status code.
1178	* @param pVM The cross context VM structure.
1179	*/
1180	VMM_INT_DECL(int) TMR3Term(PVM pVM)
1181	{
1182	if (pVM->tm.s.pTimer)
1183	{
1184	int rc = RTTimerDestroy(pVM->tm.s.pTimer);
1185	AssertRC(rc);
1186	pVM->tm.s.pTimer = NULL;
1187	}
1188
1189	return VINF_SUCCESS;
1190	}
1191
1192
1193	/**
1194	* The VM is being reset.
1195	*
1196	* For the TM component this means that a rescheduling is preformed,
1197	* the FF is cleared and but without running the queues. We'll have to
1198	* check if this makes sense or not, but it seems like a good idea now....
1199	*
1200	* @param pVM The cross context VM structure.
1201	*/
1202	VMM_INT_DECL(void) TMR3Reset(PVM pVM)
1203	{
1204	LogFlow(("TMR3Reset:\n"));
1205	VM_ASSERT_EMT(pVM);
1206
1207	/*
1208	* Abort any pending catch up.
1209	* This isn't perfect...
1210	*/
1211	if (pVM->tm.s.fVirtualSyncCatchUp)
1212	{
1213	const uint64_t offVirtualNow = TMVirtualGetNoCheck(pVM);
1214	const uint64_t offVirtualSyncNow = TMVirtualSyncGetNoCheck(pVM);
1215	if (pVM->tm.s.fVirtualSyncCatchUp)
1216	{
1217	STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatVirtualSyncCatchup, c);
1218
1219	const uint64_t offOld = pVM->tm.s.offVirtualSyncGivenUp;
1220	const uint64_t offNew = offVirtualNow - offVirtualSyncNow;
1221	Assert(offOld <= offNew);
1222	ASMAtomicWriteU64((uint64_t volatile *)&pVM->tm.s.offVirtualSyncGivenUp, offNew);
1223	ASMAtomicWriteU64((uint64_t volatile *)&pVM->tm.s.offVirtualSync, offNew);
1224	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncCatchUp, false);
1225	LogRel(("TM: Aborting catch-up attempt on reset with a %'RU64 ns lag on reset; new total: %'RU64 ns\n", offNew - offOld, offNew));
1226	}
1227	}
1228
1229	/*
1230	* Process the queues.
1231	*/
1232	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
1233	{
1234	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[idxQueue];
1235	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
1236	tmTimerQueueSchedule(pVM, pQueue, pQueue);
1237	PDMCritSectLeave(pVM, &pQueue->TimerLock);
1238	}
1239	#ifdef VBOX_STRICT
1240	tmTimerQueuesSanityChecks(pVM, "TMR3Reset");
1241	#endif
1242
1243	PVMCPU pVCpuDst = pVM->apCpusR3[pVM->tm.s.idTimerCpu];
1244	VMCPU_FF_CLEAR(pVCpuDst, VMCPU_FF_TIMER); /** @todo FIXME: this isn't right. */
1245
1246	/*
1247	* Switch TM TSC mode back to the original mode after a reset for
1248	* paravirtualized guests that alter the TM TSC mode during operation.
1249	* We're already in an EMT rendezvous at this point.
1250	*/
1251	if ( pVM->tm.s.fTSCModeSwitchAllowed
1252	&& pVM->tm.s.enmTSCMode != pVM->tm.s.enmOriginalTSCMode)
1253	{
1254	VM_ASSERT_EMT0(pVM);
1255	tmR3CpuTickParavirtDisable(pVM, pVM->apCpusR3[0], NULL /* pvData */);
1256	}
1257	Assert(!GIMIsParavirtTscEnabled(pVM));
1258	pVM->tm.s.fParavirtTscEnabled = false;
1259
1260	/*
1261	* Reset TSC to avoid a Windows 8+ bug (see @bugref{8926}). If Windows
1262	* sees TSC value beyond 0x40000000000 at startup, it will reset the
1263	* TSC on boot-up CPU only, causing confusion and mayhem with SMP.
1264	*/
1265	VM_ASSERT_EMT0(pVM);
1266	uint64_t offTscRawSrc;
1267	switch (pVM->tm.s.enmTSCMode)
1268	{
1269	case TMTSCMODE_REAL_TSC_OFFSET:
1270	offTscRawSrc = SUPReadTsc() * pVM->tm.s.u8TSCMultiplier;
1271	break;
1272	case TMTSCMODE_DYNAMIC:
1273	case TMTSCMODE_VIRT_TSC_EMULATED:
1274	offTscRawSrc = TMVirtualSyncGetNoCheck(pVM);
1275	offTscRawSrc = ASMMultU64ByU32DivByU32(offTscRawSrc, pVM->tm.s.cTSCTicksPerSecond, TMCLOCK_FREQ_VIRTUAL);
1276	break;
1277	case TMTSCMODE_NATIVE_API:
1278	/** @todo NEM TSC reset on reset for Windows8+ bug workaround. */
1279	offTscRawSrc = 0;
1280	break;
1281	default:
1282	AssertFailedBreakStmt(offTscRawSrc = 0);
1283	}
1284	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
1285	{
1286	PVMCPU pVCpu = pVM->apCpusR3[idCpu];
1287	pVCpu->tm.s.offTSCRawSrc = offTscRawSrc;
1288	pVCpu->tm.s.u64TSC = 0;
1289	pVCpu->tm.s.u64TSCLastSeen = 0;
1290	#if defined(VBOX_VMM_TARGET_ARMV8)
1291	pVCpu->cNsVTimerActivate = UINT64_MAX;
1292	#endif
1293	}
1294	}
1295
1296
1297	/**
1298	* Execute state save operation.
1299	*
1300	* @returns VBox status code.
1301	* @param pVM The cross context VM structure.
1302	* @param pSSM SSM operation handle.
1303	*/
1304	static DECLCALLBACK(int) tmR3Save(PVM pVM, PSSMHANDLE pSSM)
1305	{
1306	LogFlow(("tmR3Save:\n"));
1307	#ifdef VBOX_STRICT
1308	for (VMCPUID i = 0; i < pVM->cCpus; i++)
1309	{
1310	PVMCPU pVCpu = pVM->apCpusR3[i];
1311	Assert(!pVCpu->tm.s.fTSCTicking);
1312	}
1313	Assert(!pVM->tm.s.cVirtualTicking);
1314	Assert(!pVM->tm.s.fVirtualSyncTicking);
1315	Assert(!pVM->tm.s.cTSCsTicking);
1316	#endif
1317
1318	/*
1319	* Save the virtual clocks.
1320	*/
1321	/* the virtual clock. */
1322	SSMR3PutU64(pSSM, TMCLOCK_FREQ_VIRTUAL);
1323	SSMR3PutU64(pSSM, pVM->tm.s.u64Virtual);
1324
1325	/* the virtual timer synchronous clock. */
1326	SSMR3PutU64(pSSM, pVM->tm.s.u64VirtualSync);
1327	SSMR3PutU64(pSSM, pVM->tm.s.offVirtualSync);
1328	SSMR3PutU64(pSSM, pVM->tm.s.offVirtualSyncGivenUp);
1329	SSMR3PutU64(pSSM, pVM->tm.s.u64VirtualSyncCatchUpPrev);
1330	SSMR3PutBool(pSSM, pVM->tm.s.fVirtualSyncCatchUp);
1331
1332	/* real time clock */
1333	SSMR3PutU64(pSSM, TMCLOCK_FREQ_REAL);
1334
1335	/* the cpu tick clock. */
1336	for (VMCPUID i = 0; i < pVM->cCpus; i++)
1337	{
1338	PVMCPU pVCpu = pVM->apCpusR3[i];
1339	SSMR3PutU64(pSSM, TMCpuTickGet(pVCpu));
1340	}
1341	return SSMR3PutU64(pSSM, pVM->tm.s.cTSCTicksPerSecond);
1342	}
1343
1344
1345	/**
1346	* Execute state load operation.
1347	*
1348	* @returns VBox status code.
1349	* @param pVM The cross context VM structure.
1350	* @param pSSM SSM operation handle.
1351	* @param uVersion Data layout version.
1352	* @param uPass The data pass.
1353	*/
1354	static DECLCALLBACK(int) tmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
1355	{
1356	LogFlow(("tmR3Load:\n"));
1357
1358	Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
1359	#ifdef VBOX_STRICT
1360	for (VMCPUID i = 0; i < pVM->cCpus; i++)
1361	{
1362	PVMCPU pVCpu = pVM->apCpusR3[i];
1363	Assert(!pVCpu->tm.s.fTSCTicking);
1364	}
1365	Assert(!pVM->tm.s.cVirtualTicking);
1366	Assert(!pVM->tm.s.fVirtualSyncTicking);
1367	Assert(!pVM->tm.s.cTSCsTicking);
1368	#endif
1369
1370	/*
1371	* Validate version.
1372	*/
1373	if (uVersion != TM_SAVED_STATE_VERSION)
1374	{
1375	AssertMsgFailed(("tmR3Load: Invalid version uVersion=%d!\n", uVersion));
1376	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
1377	}
1378
1379	/*
1380	* Load the virtual clock.
1381	*/
1382	pVM->tm.s.cVirtualTicking = 0;
1383	/* the virtual clock. */
1384	uint64_t u64Hz;
1385	int rc = SSMR3GetU64(pSSM, &u64Hz);
1386	if (RT_FAILURE(rc))
1387	return rc;
1388	if (u64Hz != TMCLOCK_FREQ_VIRTUAL)
1389	{
1390	AssertMsgFailed(("The virtual clock frequency differs! Saved: %'RU64 Binary: %'RU64\n",
1391	u64Hz, TMCLOCK_FREQ_VIRTUAL));
1392	return VERR_SSM_VIRTUAL_CLOCK_HZ;
1393	}
1394	SSMR3GetU64(pSSM, &pVM->tm.s.u64Virtual);
1395	pVM->tm.s.u64VirtualOffset = 0;
1396
1397	/* the virtual timer synchronous clock. */
1398	pVM->tm.s.fVirtualSyncTicking = false;
1399	uint64_t u64;
1400	SSMR3GetU64(pSSM, &u64);
1401	pVM->tm.s.u64VirtualSync = u64;
1402	SSMR3GetU64(pSSM, &u64);
1403	pVM->tm.s.offVirtualSync = u64;
1404	SSMR3GetU64(pSSM, &u64);
1405	pVM->tm.s.offVirtualSyncGivenUp = u64;
1406	SSMR3GetU64(pSSM, &u64);
1407	pVM->tm.s.u64VirtualSyncCatchUpPrev = u64;
1408	bool f;
1409	SSMR3GetBool(pSSM, &f);
1410	pVM->tm.s.fVirtualSyncCatchUp = f;
1411
1412	/* the real clock */
1413	rc = SSMR3GetU64(pSSM, &u64Hz);
1414	if (RT_FAILURE(rc))
1415	return rc;
1416	if (u64Hz != TMCLOCK_FREQ_REAL)
1417	{
1418	AssertMsgFailed(("The real clock frequency differs! Saved: %'RU64 Binary: %'RU64\n",
1419	u64Hz, TMCLOCK_FREQ_REAL));
1420	return VERR_SSM_VIRTUAL_CLOCK_HZ; /* misleading... */
1421	}
1422
1423	/* the cpu tick clock. */
1424	pVM->tm.s.cTSCsTicking = 0;
1425	pVM->tm.s.offTSCPause = 0;
1426	pVM->tm.s.u64LastPausedTSC = 0;
1427	for (VMCPUID i = 0; i < pVM->cCpus; i++)
1428	{
1429	PVMCPU pVCpu = pVM->apCpusR3[i];
1430
1431	pVCpu->tm.s.fTSCTicking = false;
1432	SSMR3GetU64(pSSM, &pVCpu->tm.s.u64TSC);
1433	if (pVM->tm.s.u64LastPausedTSC < pVCpu->tm.s.u64TSC)
1434	pVM->tm.s.u64LastPausedTSC = pVCpu->tm.s.u64TSC;
1435
1436	if (pVM->tm.s.enmTSCMode == TMTSCMODE_REAL_TSC_OFFSET)
1437	pVCpu->tm.s.offTSCRawSrc = 0; /** @todo TSC restore stuff and HWACC. */
1438	}
1439
1440	rc = SSMR3GetU64(pSSM, &u64Hz);
1441	if (RT_FAILURE(rc))
1442	return rc;
1443	if (pVM->tm.s.enmTSCMode != TMTSCMODE_REAL_TSC_OFFSET)
1444	pVM->tm.s.cTSCTicksPerSecond = u64Hz;
1445
1446	LogRel(("TM: cTSCTicksPerSecond=%#RX64 (%'RU64) enmTSCMode=%d (%s) (state load)\n",
1447	pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.enmTSCMode, tmR3GetTSCModeName(pVM)));
1448
1449	/* Disabled as this isn't tested, also should this apply only if GIM is enabled etc. */
1450	#if 0
1451	/*
1452	* If the current host TSC frequency is incompatible with what is in the
1453	* saved state of the VM, fall back to emulating TSC and disallow TSC mode
1454	* switches during VM runtime (e.g. by GIM).
1455	*/
1456	if ( GIMIsEnabled(pVM)
1457	\|\| pVM->tm.s.enmTSCMode == TMTSCMODE_REAL_TSC_OFFSET)
1458	{
1459	uint64_t uGipCpuHz;
1460	bool fRelax = RTSystemIsInsideVM();
1461	bool fCompat = SUPIsTscFreqCompatible(pVM->tm.s.cTSCTicksPerSecond, &uGipCpuHz, fRelax);
1462	if (!fCompat)
1463	{
1464	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
1465	pVM->tm.s.fTSCModeSwitchAllowed = false;
1466	if (g_pSUPGlobalInfoPage->u32Mode != SUPGIPMODE_ASYNC_TSC)
1467	{
1468	LogRel(("TM: TSC frequency incompatible! uGipCpuHz=%#RX64 (%'RU64) enmTSCMode=%d (%s) fTSCModeSwitchAllowed=%RTbool (state load)\n",
1469	uGipCpuHz, uGipCpuHz, pVM->tm.s.enmTSCMode, tmR3GetTSCModeName(pVM), pVM->tm.s.fTSCModeSwitchAllowed));
1470	}
1471	else
1472	{
1473	LogRel(("TM: GIP is async, enmTSCMode=%d (%s) fTSCModeSwitchAllowed=%RTbool (state load)\n",
1474	uGipCpuHz, uGipCpuHz, pVM->tm.s.enmTSCMode, tmR3GetTSCModeName(pVM), pVM->tm.s.fTSCModeSwitchAllowed));
1475	}
1476	}
1477	}
1478	#endif
1479
1480	/*
1481	* Make sure timers get rescheduled immediately.
1482	*/
1483	PVMCPU pVCpuDst = pVM->apCpusR3[pVM->tm.s.idTimerCpu];
1484	VMCPU_FF_SET(pVCpuDst, VMCPU_FF_TIMER);
1485
1486	return VINF_SUCCESS;
1487	}
1488
1489	#ifdef VBOX_WITH_STATISTICS
1490
1491	/**
1492	* Register statistics for a timer.
1493	*
1494	* @param pVM The cross context VM structure.
1495	* @param pQueue The queue the timer belongs to.
1496	* @param pTimer The timer to register statistics for.
1497	*/
1498	static void tmR3TimerRegisterStats(PVM pVM, PTMTIMERQUEUE pQueue, PTMTIMER pTimer)
1499	{
1500	STAMR3RegisterF(pVM, &pTimer->StatTimer, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS_PER_CALL,
1501	pQueue->szName, "/TM/Timers/%s", pTimer->szName);
1502	STAMR3RegisterF(pVM, &pTimer->StatCritSectEnter, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS_PER_CALL,
1503	"", "/TM/Timers/%s/CritSectEnter", pTimer->szName);
1504	STAMR3RegisterF(pVM, &pTimer->StatGet, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS,
1505	"", "/TM/Timers/%s/Get", pTimer->szName);
1506	STAMR3RegisterF(pVM, &pTimer->StatSetAbsolute, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS,
1507	"", "/TM/Timers/%s/SetAbsolute", pTimer->szName);
1508	STAMR3RegisterF(pVM, &pTimer->StatSetRelative, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS,
1509	"", "/TM/Timers/%s/SetRelative", pTimer->szName);
1510	STAMR3RegisterF(pVM, &pTimer->StatStop, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS,
1511	"", "/TM/Timers/%s/Stop", pTimer->szName);
1512	}
1513
1514
1515	/**
1516	* Deregister the statistics for a timer.
1517	*/
1518	static void tmR3TimerDeregisterStats(PVM pVM, PTMTIMER pTimer)
1519	{
1520	char szPrefix[128];
1521	size_t cchPrefix = RTStrPrintf(szPrefix, sizeof(szPrefix), "/TM/Timers/%s/", pTimer->szName);
1522	STAMR3DeregisterByPrefix(pVM->pUVM, szPrefix);
1523	szPrefix[cchPrefix - 1] = '\0';
1524	STAMR3Deregister(pVM->pUVM, szPrefix);
1525	}
1526
1527
1528	/**
1529	* Register statistics for all allocated timers in a queue.
1530	*
1531	* @param pVM The cross context VM structure.
1532	* @param pQueue The queue to register statistics for.
1533	* @param cTimers Number of timers to consider (in growth scenario).
1534	*/
1535	static void tmR3TimerQueueRegisterStats(PVM pVM, PTMTIMERQUEUE pQueue, uint32_t cTimers)
1536	{
1537	uint32_t idxTimer = RT_MIN(cTimers, pQueue->cTimersAlloc);
1538	while (idxTimer-- > 0)
1539	{
1540	PTMTIMER pTimer = &pQueue->paTimers[idxTimer];
1541	TMTIMERSTATE enmState = pTimer->enmState;
1542	if (enmState > TMTIMERSTATE_INVALID && enmState < TMTIMERSTATE_DESTROY)
1543	tmR3TimerRegisterStats(pVM, pQueue, pTimer);
1544	}
1545	}
1546
1547	#endif /* VBOX_WITH_STATISTICS */
1548
1549
1550	/**
1551	* Grows a timer queue.
1552	*
1553	* @returns VBox status code (errors are LogRel'ed already).
1554	* @param pVM The cross context VM structure.
1555	* @param pQueue The timer queue to grow.
1556	* @param cNewTimers The minimum number of timers after growing.
1557	* @note Caller owns the queue's allocation lock.
1558	*/
1559	static int tmR3TimerQueueGrow(PVM pVM, PTMTIMERQUEUE pQueue, uint32_t cNewTimers)
1560	{
1561	/*
1562	* Validate input and state.
1563	*/
1564	VM_ASSERT_EMT0_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
1565	VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_VM_INVALID_VM_STATE); /** @todo must do better than this! */
1566	AssertReturn(!pQueue->fCannotGrow, VERR_TM_TIMER_QUEUE_CANNOT_GROW);
1567
1568	uint32_t const cOldEntries = pQueue->cTimersAlloc;
1569	AssertReturn(cNewTimers > cOldEntries, VERR_TM_IPE_1);
1570	AssertReturn(cNewTimers < _32K, VERR_TM_IPE_1);
1571
1572	/*
1573	* Do the growing.
1574	*/
1575	int rc;
1576	if (!SUPR3IsDriverless())
1577	{
1578	rc = VMMR3CallR0Emt(pVM, VMMGetCpu(pVM), VMMR0_DO_TM_GROW_TIMER_QUEUE,
1579	RT_MAKE_U64(cNewTimers, (uint64_t)(pQueue - &pVM->tm.s.aTimerQueues[0])), NULL);
1580	AssertLogRelRCReturn(rc, rc);
1581	AssertReturn(pQueue->cTimersAlloc >= cNewTimers, VERR_TM_IPE_3);
1582	}
1583	else
1584	{
1585	AssertReturn(cNewTimers <= _32K && cOldEntries <= _32K, VERR_TM_TOO_MANY_TIMERS);
1586	ASMCompilerBarrier();
1587
1588	/*
1589	* Round up the request to the nearest page and do the allocation.
1590	*/
1591	size_t cbNew = sizeof(TMTIMER) * cNewTimers;
1592	cbNew = RT_ALIGN_Z(cbNew, HOST_PAGE_SIZE);
1593	cNewTimers = (uint32_t)(cbNew / sizeof(TMTIMER));
1594
1595	PTMTIMER paTimers = (PTMTIMER)RTMemPageAllocZ(cbNew);
1596	if (paTimers)
1597	{
1598	/*
1599	* Copy over the old timer, init the new free ones, then switch over
1600	* and free the old ones.
1601	*/
1602	PTMTIMER const paOldTimers = pQueue->paTimers;
1603	tmHCTimerQueueGrowInit(paTimers, paOldTimers, cNewTimers, cOldEntries);
1604
1605	pQueue->paTimers = paTimers;
1606	pQueue->cTimersAlloc = cNewTimers;
1607	pQueue->cTimersFree += cNewTimers - (cOldEntries ? cOldEntries : 1);
1608
1609	RTMemPageFree(paOldTimers, RT_ALIGN_Z(sizeof(TMTIMER) * cOldEntries, HOST_PAGE_SIZE));
1610	rc = VINF_SUCCESS;
1611	}
1612	else
1613	rc = VERR_NO_PAGE_MEMORY;
1614	}
1615	return rc;
1616	}
1617
1618
1619	/**
1620	* Internal TMR3TimerCreate worker.
1621	*
1622	* @returns VBox status code.
1623	* @param pVM The cross context VM structure.
1624	* @param enmClock The timer clock.
1625	* @param fFlags TMTIMER_FLAGS_XXX.
1626	* @param pszName The timer name.
1627	* @param ppTimer Where to store the timer pointer on success.
1628	*/
1629	static int tmr3TimerCreate(PVM pVM, TMCLOCK enmClock, uint32_t fFlags, const char *pszName, PPTMTIMERR3 ppTimer)
1630	{
1631	PTMTIMER pTimer;
1632
1633	/*
1634	* Validate input.
1635	*/
1636	VM_ASSERT_EMT(pVM);
1637
1638	AssertReturn((fFlags & (TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0)) != (TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0),
1639	VERR_INVALID_FLAGS);
1640
1641	AssertPtrReturn(pszName, VERR_INVALID_POINTER);
1642	size_t const cchName = strlen(pszName);
1643	AssertMsgReturn(cchName < sizeof(pTimer->szName), ("timer name too long: %s\n", pszName), VERR_INVALID_NAME);
1644	AssertMsgReturn(cchName > 2, ("Too short timer name: %s\n", pszName), VERR_INVALID_NAME);
1645
1646	AssertMsgReturn(enmClock >= TMCLOCK_REAL && enmClock < TMCLOCK_MAX,
1647	("%d\n", enmClock), VERR_INVALID_PARAMETER);
1648	AssertReturn(enmClock != TMCLOCK_TSC, VERR_NOT_SUPPORTED);
1649	if (enmClock == TMCLOCK_VIRTUAL_SYNC)
1650	VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_WRONG_ORDER);
1651
1652	/*
1653	* Exclusively lock the queue.
1654	*
1655	* Note! This means that it is not possible to allocate timers from a timer callback.
1656	*/
1657	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[enmClock];
1658	int rc = PDMCritSectRwEnterExcl(pVM, &pQueue->AllocLock, VERR_IGNORED);
1659	AssertRCReturn(rc, rc);
1660
1661	/*
1662	* Allocate the timer.
1663	*/
1664	if (!pQueue->cTimersFree)
1665	{
1666	rc = tmR3TimerQueueGrow(pVM, pQueue, pQueue->cTimersAlloc + 64);
1667	AssertRCReturnStmt(rc, PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock), rc);
1668	}
1669
1670	/* Scan the array for free timers. */
1671	pTimer = NULL;
1672	PTMTIMER const paTimers = pQueue->paTimers;
1673	uint32_t const cTimersAlloc = pQueue->cTimersAlloc;
1674	uint32_t idxTimer = pQueue->idxFreeHint;
1675	for (uint32_t iScan = 0; iScan < 2; iScan++)
1676	{
1677	while (idxTimer < cTimersAlloc)
1678	{
1679	if (paTimers[idxTimer].enmState == TMTIMERSTATE_FREE)
1680	{
1681	pTimer = &paTimers[idxTimer];
1682	pQueue->idxFreeHint = idxTimer + 1;
1683	break;
1684	}
1685	idxTimer++;
1686	}
1687	if (pTimer != NULL)
1688	break;
1689	idxTimer = 1;
1690	}
1691	AssertLogRelMsgReturnStmt(pTimer != NULL, ("cTimersFree=%u cTimersAlloc=%u enmClock=%s\n", pQueue->cTimersFree,
1692	pQueue->cTimersAlloc, pQueue->szName),
1693	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock), VERR_INTERNAL_ERROR_3);
1694	pQueue->cTimersFree -= 1;
1695
1696	/*
1697	* Initialize it.
1698	*/
1699	Assert(idxTimer != 0);
1700	Assert(idxTimer <= TMTIMERHANDLE_TIMER_IDX_MASK);
1701	pTimer->hSelf = idxTimer
1702	\| ((uintptr_t)(pQueue - &pVM->tm.s.aTimerQueues[0]) << TMTIMERHANDLE_QUEUE_IDX_SHIFT);
1703	Assert(!(pTimer->hSelf & TMTIMERHANDLE_RANDOM_MASK));
1704	pTimer->hSelf \|= (RTRandU64() & TMTIMERHANDLE_RANDOM_MASK);
1705
1706	pTimer->u64Expire = 0;
1707	pTimer->enmState = TMTIMERSTATE_STOPPED;
1708	pTimer->idxScheduleNext = UINT32_MAX;
1709	pTimer->idxNext = UINT32_MAX;
1710	pTimer->idxPrev = UINT32_MAX;
1711	pTimer->fFlags = fFlags;
1712	pTimer->uHzHint = 0;
1713	pTimer->pvUser = NULL;
1714	pTimer->pCritSect = NULL;
1715	memcpy(pTimer->szName, pszName, cchName);
1716	pTimer->szName[cchName] = '\0';
1717
1718	#ifdef VBOX_STRICT
1719	tmTimerQueuesSanityChecks(pVM, "tmR3TimerCreate");
1720	#endif
1721
1722	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
1723
1724	#ifdef VBOX_WITH_STATISTICS
1725	/*
1726	* Only register statistics if we're passed the no-realloc point.
1727	*/
1728	if (pQueue->fCannotGrow)
1729	tmR3TimerRegisterStats(pVM, pQueue, pTimer);
1730	#endif
1731
1732	*ppTimer = pTimer;
1733	return VINF_SUCCESS;
1734	}
1735
1736
1737	/**
1738	* Creates a device timer.
1739	*
1740	* @returns VBox status code.
1741	* @param pVM The cross context VM structure.
1742	* @param pDevIns Device instance.
1743	* @param enmClock The clock to use on this timer.
1744	* @param pfnCallback Callback function.
1745	* @param pvUser The user argument to the callback.
1746	* @param fFlags Timer creation flags, see grp_tm_timer_flags.
1747	* @param pszName Timer name (will be copied). Max 31 chars.
1748	* @param phTimer Where to store the timer handle on success.
1749	*/
1750	VMM_INT_DECL(int) TMR3TimerCreateDevice(PVM pVM, PPDMDEVINS pDevIns, TMCLOCK enmClock,
1751	PFNTMTIMERDEV pfnCallback, void *pvUser,
1752	uint32_t fFlags, const char *pszName, PTMTIMERHANDLE phTimer)
1753	{
1754	AssertReturn(!(fFlags & ~(TMTIMER_FLAGS_NO_CRIT_SECT \| TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0)),
1755	VERR_INVALID_FLAGS);
1756
1757	/*
1758	* Allocate and init stuff.
1759	*/
1760	PTMTIMER pTimer;
1761	int rc = tmr3TimerCreate(pVM, enmClock, fFlags, pszName, &pTimer);
1762	if (RT_SUCCESS(rc))
1763	{
1764	pTimer->enmType = TMTIMERTYPE_DEV;
1765	pTimer->u.Dev.pfnTimer = pfnCallback;
1766	pTimer->u.Dev.pDevIns = pDevIns;
1767	pTimer->pvUser = pvUser;
1768	if (!(fFlags & TMTIMER_FLAGS_NO_CRIT_SECT))
1769	pTimer->pCritSect = PDMR3DevGetCritSect(pVM, pDevIns);
1770	*phTimer = pTimer->hSelf;
1771	Log(("TM: Created device timer %p clock %d callback %p '%s'\n", phTimer, enmClock, pfnCallback, pszName));
1772	}
1773
1774	return rc;
1775	}
1776
1777
1778
1779
1780	/**
1781	* Creates a USB device timer.
1782	*
1783	* @returns VBox status code.
1784	* @param pVM The cross context VM structure.
1785	* @param pUsbIns The USB device instance.
1786	* @param enmClock The clock to use on this timer.
1787	* @param pfnCallback Callback function.
1788	* @param pvUser The user argument to the callback.
1789	* @param fFlags Timer creation flags, see grp_tm_timer_flags.
1790	* @param pszName Timer name (will be copied). Max 31 chars.
1791	* @param phTimer Where to store the timer handle on success.
1792	*/
1793	VMM_INT_DECL(int) TMR3TimerCreateUsb(PVM pVM, PPDMUSBINS pUsbIns, TMCLOCK enmClock,
1794	PFNTMTIMERUSB pfnCallback, void *pvUser,
1795	uint32_t fFlags, const char *pszName, PTMTIMERHANDLE phTimer)
1796	{
1797	AssertReturn(!(fFlags & ~(TMTIMER_FLAGS_NO_CRIT_SECT \| TMTIMER_FLAGS_NO_RING0)), VERR_INVALID_PARAMETER);
1798
1799	/*
1800	* Allocate and init stuff.
1801	*/
1802	PTMTIMER pTimer;
1803	int rc = tmr3TimerCreate(pVM, enmClock, fFlags, pszName, &pTimer);
1804	if (RT_SUCCESS(rc))
1805	{
1806	pTimer->enmType = TMTIMERTYPE_USB;
1807	pTimer->u.Usb.pfnTimer = pfnCallback;
1808	pTimer->u.Usb.pUsbIns = pUsbIns;
1809	pTimer->pvUser = pvUser;
1810	//if (!(fFlags & TMTIMER_FLAGS_NO_CRIT_SECT))
1811	//{
1812	// if (pDevIns->pCritSectR3)
1813	// pTimer->pCritSect = pUsbIns->pCritSectR3;
1814	// else
1815	// pTimer->pCritSect = IOMR3GetCritSect(pVM);
1816	//}
1817	*phTimer = pTimer->hSelf;
1818	Log(("TM: Created USB device timer %p clock %d callback %p '%s'\n", *phTimer, enmClock, pfnCallback, pszName));
1819	}
1820
1821	return rc;
1822	}
1823
1824
1825	/**
1826	* Creates a driver timer.
1827	*
1828	* @returns VBox status code.
1829	* @param pVM The cross context VM structure.
1830	* @param pDrvIns Driver instance.
1831	* @param enmClock The clock to use on this timer.
1832	* @param pfnCallback Callback function.
1833	* @param pvUser The user argument to the callback.
1834	* @param fFlags Timer creation flags, see grp_tm_timer_flags.
1835	* @param pszName Timer name (will be copied). Max 31 chars.
1836	* @param phTimer Where to store the timer handle on success.
1837	*/
1838	VMM_INT_DECL(int) TMR3TimerCreateDriver(PVM pVM, PPDMDRVINS pDrvIns, TMCLOCK enmClock, PFNTMTIMERDRV pfnCallback, void *pvUser,
1839	uint32_t fFlags, const char *pszName, PTMTIMERHANDLE phTimer)
1840	{
1841	AssertReturn(!(fFlags & ~(TMTIMER_FLAGS_NO_CRIT_SECT \| TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0)),
1842	VERR_INVALID_FLAGS);
1843
1844	/*
1845	* Allocate and init stuff.
1846	*/
1847	PTMTIMER pTimer;
1848	int rc = tmr3TimerCreate(pVM, enmClock, fFlags, pszName, &pTimer);
1849	if (RT_SUCCESS(rc))
1850	{
1851	pTimer->enmType = TMTIMERTYPE_DRV;
1852	pTimer->u.Drv.pfnTimer = pfnCallback;
1853	pTimer->u.Drv.pDrvIns = pDrvIns;
1854	pTimer->pvUser = pvUser;
1855	*phTimer = pTimer->hSelf;
1856	Log(("TM: Created device timer %p clock %d callback %p '%s'\n", *phTimer, enmClock, pfnCallback, pszName));
1857	}
1858
1859	return rc;
1860	}
1861
1862
1863	/**
1864	* Creates an internal timer.
1865	*
1866	* @returns VBox status code.
1867	* @param pVM The cross context VM structure.
1868	* @param enmClock The clock to use on this timer.
1869	* @param pfnCallback Callback function.
1870	* @param pvUser User argument to be passed to the callback.
1871	* @param fFlags Timer creation flags, see grp_tm_timer_flags.
1872	* @param pszName Timer name (will be copied). Max 31 chars.
1873	* @param phTimer Where to store the timer handle on success.
1874	*/
1875	VMMR3DECL(int) TMR3TimerCreate(PVM pVM, TMCLOCK enmClock, PFNTMTIMERINT pfnCallback, void *pvUser,
1876	uint32_t fFlags, const char *pszName, PTMTIMERHANDLE phTimer)
1877	{
1878	AssertReturn(fFlags & (TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0), VERR_INVALID_FLAGS);
1879	AssertReturn((fFlags & (TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0)) != (TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0),
1880	VERR_INVALID_FLAGS);
1881
1882	/*
1883	* Allocate and init stuff.
1884	*/
1885	PTMTIMER pTimer;
1886	int rc = tmr3TimerCreate(pVM, enmClock, fFlags, pszName, &pTimer);
1887	if (RT_SUCCESS(rc))
1888	{
1889	pTimer->enmType = TMTIMERTYPE_INTERNAL;
1890	pTimer->u.Internal.pfnTimer = pfnCallback;
1891	pTimer->pvUser = pvUser;
1892	*phTimer = pTimer->hSelf;
1893	Log(("TM: Created internal timer %p clock %d callback %p '%s'\n", pTimer, enmClock, pfnCallback, pszName));
1894	}
1895
1896	return rc;
1897	}
1898
1899
1900	/**
1901	* Destroy a timer
1902	*
1903	* @returns VBox status code.
1904	* @param pVM The cross context VM structure.
1905	* @param pQueue The queue the timer is on.
1906	* @param pTimer Timer handle as returned by one of the create functions.
1907	*/
1908	static int tmR3TimerDestroy(PVMCC pVM, PTMTIMERQUEUE pQueue, PTMTIMER pTimer)
1909	{
1910	bool fActive = false;
1911	bool fPending = false;
1912
1913	AssertMsg( !pTimer->pCritSect
1914	\|\| VMR3GetState(pVM) != VMSTATE_RUNNING
1915	\|\| PDMCritSectIsOwner(pVM, pTimer->pCritSect), ("%s\n", pTimer->szName));
1916
1917	/*
1918	* The rest of the game happens behind the lock, just
1919	* like create does. All the work is done here.
1920	*/
1921	PDMCritSectRwEnterExcl(pVM, &pQueue->AllocLock, VERR_IGNORED);
1922	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
1923
1924	for (int cRetries = 1000;; cRetries--)
1925	{
1926	/*
1927	* Change to the DESTROY state.
1928	*/
1929	TMTIMERSTATE const enmState = pTimer->enmState;
1930	Log2(("TMTimerDestroy: %p:{.enmState=%s, .szName='%s'} cRetries=%d\n",
1931	pTimer, tmTimerState(enmState), pTimer->szName, cRetries));
1932	switch (enmState)
1933	{
1934	case TMTIMERSTATE_STOPPED:
1935	case TMTIMERSTATE_EXPIRED_DELIVER:
1936	break;
1937
1938	case TMTIMERSTATE_ACTIVE:
1939	fActive = true;
1940	break;
1941
1942	case TMTIMERSTATE_PENDING_STOP:
1943	case TMTIMERSTATE_PENDING_STOP_SCHEDULE:
1944	case TMTIMERSTATE_PENDING_RESCHEDULE:
1945	fActive = true;
1946	fPending = true;
1947	break;
1948
1949	case TMTIMERSTATE_PENDING_SCHEDULE:
1950	fPending = true;
1951	break;
1952
1953	/*
1954	* This shouldn't happen as the caller should make sure there are no races.
1955	*/
1956	case TMTIMERSTATE_EXPIRED_GET_UNLINK:
1957	case TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE:
1958	case TMTIMERSTATE_PENDING_RESCHEDULE_SET_EXPIRE:
1959	AssertMsgFailed(("%p:.enmState=%s %s\n", pTimer, tmTimerState(enmState), pTimer->szName));
1960	PDMCritSectLeave(pVM, &pQueue->TimerLock);
1961	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
1962
1963	AssertMsgReturn(cRetries > 0, ("Failed waiting for stable state. state=%d (%s)\n", pTimer->enmState, pTimer->szName),
1964	VERR_TM_UNSTABLE_STATE);
1965	if (!RTThreadYield())
1966	RTThreadSleep(1);
1967
1968	PDMCritSectRwEnterExcl(pVM, &pQueue->AllocLock, VERR_IGNORED);
1969	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
1970	continue;
1971
1972	/*
1973	* Invalid states.
1974	*/
1975	case TMTIMERSTATE_FREE:
1976	case TMTIMERSTATE_DESTROY:
1977	PDMCritSectLeave(pVM, &pQueue->TimerLock);
1978	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
1979	AssertLogRelMsgFailedReturn(("pTimer=%p %s\n", pTimer, tmTimerState(enmState)), VERR_TM_INVALID_STATE);
1980
1981	default:
1982	AssertMsgFailed(("Unknown timer state %d (%s)\n", enmState, pTimer->szName));
1983	PDMCritSectLeave(pVM, &pQueue->TimerLock);
1984	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
1985	return VERR_TM_UNKNOWN_STATE;
1986	}
1987
1988	/*
1989	* Try switch to the destroy state.
1990	* This should always succeed as the caller should make sure there are no race.
1991	*/
1992	bool fRc;
1993	TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_DESTROY, enmState, fRc);
1994	if (fRc)
1995	break;
1996	AssertMsgFailed(("%p:.enmState=%s %s\n", pTimer, tmTimerState(enmState), pTimer->szName));
1997	PDMCritSectLeave(pVM, &pQueue->TimerLock);
1998	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
1999
2000	AssertMsgReturn(cRetries > 0, ("Failed waiting for stable state. state=%d (%s)\n", pTimer->enmState, pTimer->szName),
2001	VERR_TM_UNSTABLE_STATE);
2002
2003	PDMCritSectRwEnterExcl(pVM, &pQueue->AllocLock, VERR_IGNORED);
2004	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
2005	}
2006
2007	/*
2008	* Unlink from the active list.
2009	*/
2010	if (fActive)
2011	{
2012	const PTMTIMER pPrev = tmTimerGetPrev(pQueue, pTimer);
2013	const PTMTIMER pNext = tmTimerGetNext(pQueue, pTimer);
2014	if (pPrev)
2015	tmTimerSetNext(pQueue, pPrev, pNext);
2016	else
2017	{
2018	tmTimerQueueSetHead(pQueue, pQueue, pNext);
2019	pQueue->u64Expire = pNext ? pNext->u64Expire : INT64_MAX;
2020	}
2021	if (pNext)
2022	tmTimerSetPrev(pQueue, pNext, pPrev);
2023	pTimer->idxNext = UINT32_MAX;
2024	pTimer->idxPrev = UINT32_MAX;
2025	}
2026
2027	/*
2028	* Unlink from the schedule list by running it.
2029	*/
2030	if (fPending)
2031	{
2032	Log3(("TMR3TimerDestroy: tmTimerQueueSchedule\n"));
2033	STAM_PROFILE_START(&pVM->tm.s.CTX_SUFF_Z(StatScheduleOne), a);
2034	Assert(pQueue->idxSchedule < pQueue->cTimersAlloc);
2035	tmTimerQueueSchedule(pVM, pQueue, pQueue);
2036	STAM_PROFILE_STOP(&pVM->tm.s.CTX_SUFF_Z(StatScheduleOne), a);
2037	}
2038
2039	#ifdef VBOX_WITH_STATISTICS
2040	/*
2041	* Deregister statistics.
2042	*/
2043	tmR3TimerDeregisterStats(pVM, pTimer);
2044	#endif
2045
2046	/*
2047	* Change it to free state and update the queue accordingly.
2048	*/
2049	Assert(pTimer->idxNext == UINT32_MAX); Assert(pTimer->idxPrev == UINT32_MAX); Assert(pTimer->idxScheduleNext == UINT32_MAX);
2050
2051	TM_SET_STATE(pTimer, TMTIMERSTATE_FREE);
2052
2053	pQueue->cTimersFree += 1;
2054	uint32_t idxTimer = (uint32_t)(pTimer - pQueue->paTimers);
2055	if (idxTimer < pQueue->idxFreeHint)
2056	pQueue->idxFreeHint = idxTimer;
2057
2058	#ifdef VBOX_STRICT
2059	tmTimerQueuesSanityChecks(pVM, "TMR3TimerDestroy");
2060	#endif
2061	PDMCritSectLeave(pVM, &pQueue->TimerLock);
2062	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
2063	return VINF_SUCCESS;
2064	}
2065
2066
2067	/**
2068	* Destroy a timer
2069	*
2070	* @returns VBox status code.
2071	* @param pVM The cross context VM structure.
2072	* @param hTimer Timer handle as returned by one of the create functions.
2073	*/
2074	VMMR3DECL(int) TMR3TimerDestroy(PVM pVM, TMTIMERHANDLE hTimer)
2075	{
2076	/* We ignore NILs here. */
2077	if (hTimer == NIL_TMTIMERHANDLE)
2078	return VINF_SUCCESS;
2079	TMTIMER_HANDLE_TO_VARS_RETURN(pVM, hTimer); /* => pTimer, pQueueCC, pQueue, idxTimer, idxQueue */
2080	return tmR3TimerDestroy(pVM, pQueue, pTimer);
2081	}
2082
2083
2084	/**
2085	* Destroy all timers owned by a device.
2086	*
2087	* @returns VBox status code.
2088	* @param pVM The cross context VM structure.
2089	* @param pDevIns Device which timers should be destroyed.
2090	*/
2091	VMM_INT_DECL(int) TMR3TimerDestroyDevice(PVM pVM, PPDMDEVINS pDevIns)
2092	{
2093	LogFlow(("TMR3TimerDestroyDevice: pDevIns=%p\n", pDevIns));
2094	if (!pDevIns)
2095	return VERR_INVALID_PARAMETER;
2096
2097	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
2098	{
2099	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[idxQueue];
2100	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2101	uint32_t idxTimer = pQueue->cTimersAlloc;
2102	while (idxTimer-- > 0)
2103	{
2104	PTMTIMER pTimer = &pQueue->paTimers[idxTimer];
2105	if ( pTimer->enmType == TMTIMERTYPE_DEV
2106	&& pTimer->u.Dev.pDevIns == pDevIns
2107	&& pTimer->enmState < TMTIMERSTATE_DESTROY)
2108	{
2109	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2110
2111	int rc = tmR3TimerDestroy(pVM, pQueue, pTimer);
2112	AssertRC(rc);
2113
2114	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2115	}
2116	}
2117	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2118	}
2119
2120	LogFlow(("TMR3TimerDestroyDevice: returns VINF_SUCCESS\n"));
2121	return VINF_SUCCESS;
2122	}
2123
2124
2125	/**
2126	* Destroy all timers owned by a USB device.
2127	*
2128	* @returns VBox status code.
2129	* @param pVM The cross context VM structure.
2130	* @param pUsbIns USB device which timers should be destroyed.
2131	*/
2132	VMM_INT_DECL(int) TMR3TimerDestroyUsb(PVM pVM, PPDMUSBINS pUsbIns)
2133	{
2134	LogFlow(("TMR3TimerDestroyUsb: pUsbIns=%p\n", pUsbIns));
2135	if (!pUsbIns)
2136	return VERR_INVALID_PARAMETER;
2137
2138	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
2139	{
2140	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[idxQueue];
2141	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2142	uint32_t idxTimer = pQueue->cTimersAlloc;
2143	while (idxTimer-- > 0)
2144	{
2145	PTMTIMER pTimer = &pQueue->paTimers[idxTimer];
2146	if ( pTimer->enmType == TMTIMERTYPE_USB
2147	&& pTimer->u.Usb.pUsbIns == pUsbIns
2148	&& pTimer->enmState < TMTIMERSTATE_DESTROY)
2149	{
2150	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2151
2152	int rc = tmR3TimerDestroy(pVM, pQueue, pTimer);
2153	AssertRC(rc);
2154
2155	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2156	}
2157	}
2158	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2159	}
2160
2161	LogFlow(("TMR3TimerDestroyUsb: returns VINF_SUCCESS\n"));
2162	return VINF_SUCCESS;
2163	}
2164
2165
2166	/**
2167	* Destroy all timers owned by a driver.
2168	*
2169	* @returns VBox status code.
2170	* @param pVM The cross context VM structure.
2171	* @param pDrvIns Driver which timers should be destroyed.
2172	*/
2173	VMM_INT_DECL(int) TMR3TimerDestroyDriver(PVM pVM, PPDMDRVINS pDrvIns)
2174	{
2175	LogFlow(("TMR3TimerDestroyDriver: pDrvIns=%p\n", pDrvIns));
2176	if (!pDrvIns)
2177	return VERR_INVALID_PARAMETER;
2178
2179	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
2180	{
2181	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[idxQueue];
2182	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2183	uint32_t idxTimer = pQueue->cTimersAlloc;
2184	while (idxTimer-- > 0)
2185	{
2186	PTMTIMER pTimer = &pQueue->paTimers[idxTimer];
2187	if ( pTimer->enmType == TMTIMERTYPE_DRV
2188	&& pTimer->u.Drv.pDrvIns == pDrvIns
2189	&& pTimer->enmState < TMTIMERSTATE_DESTROY)
2190	{
2191	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2192
2193	int rc = tmR3TimerDestroy(pVM, pQueue, pTimer);
2194	AssertRC(rc);
2195
2196	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2197	}
2198	}
2199	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2200	}
2201
2202	LogFlow(("TMR3TimerDestroyDriver: returns VINF_SUCCESS\n"));
2203	return VINF_SUCCESS;
2204	}
2205
2206
2207	/**
2208	* Internal function for getting the clock time.
2209	*
2210	* @returns clock time.
2211	* @param pVM The cross context VM structure.
2212	* @param enmClock The clock.
2213	*/
2214	DECLINLINE(uint64_t) tmClock(PVM pVM, TMCLOCK enmClock)
2215	{
2216	switch (enmClock)
2217	{
2218	case TMCLOCK_VIRTUAL: return TMVirtualGet(pVM);
2219	case TMCLOCK_VIRTUAL_SYNC: return TMVirtualSyncGet(pVM);
2220	case TMCLOCK_REAL: return TMRealGet(pVM);
2221	case TMCLOCK_TSC: return TMCpuTickGet(pVM->apCpusR3[0] /* just take VCPU 0 */);
2222	default:
2223	AssertMsgFailed(("enmClock=%d\n", enmClock));
2224	return ~(uint64_t)0;
2225	}
2226	}
2227
2228
2229	/**
2230	* Checks if the sync queue has one or more expired timers.
2231	*
2232	* @returns true / false.
2233	*
2234	* @param pVM The cross context VM structure.
2235	* @param enmClock The queue.
2236	*/
2237	DECLINLINE(bool) tmR3HasExpiredTimer(PVM pVM, TMCLOCK enmClock)
2238	{
2239	const uint64_t u64Expire = pVM->tm.s.aTimerQueues[enmClock].u64Expire;
2240	return u64Expire != INT64_MAX && u64Expire <= tmClock(pVM, enmClock);
2241	}
2242
2243
2244	/**
2245	* Checks for expired timers in all the queues.
2246	*
2247	* @returns true / false.
2248	* @param pVM The cross context VM structure.
2249	*/
2250	DECLINLINE(bool) tmR3AnyExpiredTimers(PVM pVM)
2251	{
2252	/*
2253	* Combine the time calculation for the first two since we're not on EMT
2254	* TMVirtualSyncGet only permits EMT.
2255	*/
2256	uint64_t u64Now = TMVirtualGetNoCheck(pVM);
2257	if (pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL].u64Expire <= u64Now)
2258	return true;
2259	u64Now = pVM->tm.s.fVirtualSyncTicking
2260	? u64Now - pVM->tm.s.offVirtualSync
2261	: pVM->tm.s.u64VirtualSync;
2262	if (pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC].u64Expire <= u64Now)
2263	return true;
2264
2265	/*
2266	* The remaining timers.
2267	*/
2268	if (tmR3HasExpiredTimer(pVM, TMCLOCK_REAL))
2269	return true;
2270	if (tmR3HasExpiredTimer(pVM, TMCLOCK_TSC))
2271	return true;
2272	return false;
2273	}
2274
2275
2276	/**
2277	* Schedule timer callback.
2278	*
2279	* @param pTimer Timer handle.
2280	* @param pvUser Pointer to the VM.
2281	* @thread Timer thread.
2282	*
2283	* @remark We cannot do the scheduling and queues running from a timer handler
2284	* since it's not executing in EMT, and even if it was it would be async
2285	* and we wouldn't know the state of the affairs.
2286	* So, we'll just raise the timer FF and force any REM execution to exit.
2287	*/
2288	static DECLCALLBACK(void) tmR3TimerCallback(PRTTIMER pTimer, void pvUser, uint64_t /iTick*/)
2289	{
2290	PVM pVM = (PVM)pvUser;
2291	PVMCPU pVCpuDst = pVM->apCpusR3[pVM->tm.s.idTimerCpu];
2292	NOREF(pTimer);
2293
2294	AssertCompile(TMCLOCK_MAX == 4);
2295	STAM_COUNTER_INC(&pVM->tm.s.StatTimerCallback);
2296
2297	#ifdef DEBUG_Sander /* very annoying, keep it private. */
2298	if (VMCPU_FF_IS_SET(pVCpuDst, VMCPU_FF_TIMER))
2299	Log(("tmR3TimerCallback: timer event still pending!!\n"));
2300	#endif
2301	if ( !VMCPU_FF_IS_SET(pVCpuDst, VMCPU_FF_TIMER)
2302	&& ( pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC].idxSchedule != UINT32_MAX /** @todo FIXME - reconsider offSchedule as a reason for running the timer queues. */
2303	\|\| pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL].idxSchedule != UINT32_MAX
2304	\|\| pVM->tm.s.aTimerQueues[TMCLOCK_REAL].idxSchedule != UINT32_MAX
2305	\|\| pVM->tm.s.aTimerQueues[TMCLOCK_TSC].idxSchedule != UINT32_MAX
2306	\|\| tmR3AnyExpiredTimers(pVM)
2307	)
2308	&& !VMCPU_FF_IS_SET(pVCpuDst, VMCPU_FF_TIMER)
2309	&& !pVM->tm.s.fRunningQueues
2310	)
2311	{
2312	Log5(("TM(%u): FF: 0 -> 1\n", __LINE__));
2313	VMCPU_FF_SET(pVCpuDst, VMCPU_FF_TIMER);
2314	VMR3NotifyCpuFFU(pVCpuDst->pUVCpu, VMNOTIFYFF_FLAGS_DONE_REM \| VMNOTIFYFF_FLAGS_POKE);
2315	STAM_COUNTER_INC(&pVM->tm.s.StatTimerCallbackSetFF);
2316	}
2317	}
2318
2319
2320	/**
2321	* Worker for tmR3TimerQueueDoOne that runs pending timers on the specified
2322	* non-empty timer queue.
2323	*
2324	* @param pVM The cross context VM structure.
2325	* @param pQueue The queue to run.
2326	* @param pTimer The head timer. Caller already check that this is
2327	* not NULL.
2328	*/
2329	static void tmR3TimerQueueRun(PVM pVM, PTMTIMERQUEUE pQueue, PTMTIMER pTimer)
2330	{
2331	VM_ASSERT_EMT(pVM); /** @todo relax this */
2332
2333	/*
2334	* Run timers.
2335	*
2336	* We check the clock once and run all timers which are ACTIVE
2337	* and have an expire time less or equal to the time we read.
2338	*
2339	* N.B. A generic unlink must be applied since other threads
2340	* are allowed to mess with any active timer at any time.
2341	*
2342	* However, we only allow EMT to handle EXPIRED_PENDING
2343	* timers, thus enabling the timer handler function to
2344	* arm the timer again.
2345	*/
2346	/** @todo the above 'however' is outdated. */
2347	const uint64_t u64Now = tmClock(pVM, pQueue->enmClock);
2348	while (pTimer->u64Expire <= u64Now)
2349	{
2350	PTMTIMER const pNext = tmTimerGetNext(pQueue, pTimer);
2351	PPDMCRITSECT pCritSect = pTimer->pCritSect;
2352	if (pCritSect)
2353	{
2354	STAM_PROFILE_START(&pTimer->StatCritSectEnter, Locking);
2355	PDMCritSectEnter(pVM, pCritSect, VERR_IGNORED);
2356	STAM_PROFILE_STOP(&pTimer->StatCritSectEnter, Locking);
2357	}
2358	Log2(("tmR3TimerQueueRun: %p:{.enmState=%s, .enmClock=%d, .enmType=%d, u64Expire=%llx (now=%llx) .szName='%s'}\n",
2359	pTimer, tmTimerState(pTimer->enmState), pQueue->enmClock, pTimer->enmType, pTimer->u64Expire, u64Now, pTimer->szName));
2360	bool fRc;
2361	TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_EXPIRED_GET_UNLINK, TMTIMERSTATE_ACTIVE, fRc);
2362	if (fRc)
2363	{
2364	Assert(pTimer->idxScheduleNext == UINT32_MAX); /* this can trigger falsely */
2365
2366	/* unlink */
2367	const PTMTIMER pPrev = tmTimerGetPrev(pQueue, pTimer);
2368	if (pPrev)
2369	tmTimerSetNext(pQueue, pPrev, pNext);
2370	else
2371	{
2372	tmTimerQueueSetHead(pQueue, pQueue, pNext);
2373	pQueue->u64Expire = pNext ? pNext->u64Expire : INT64_MAX;
2374	}
2375	if (pNext)
2376	tmTimerSetPrev(pQueue, pNext, pPrev);
2377	pTimer->idxNext = UINT32_MAX;
2378	pTimer->idxPrev = UINT32_MAX;
2379
2380	/* fire */
2381	TM_SET_STATE(pTimer, TMTIMERSTATE_EXPIRED_DELIVER);
2382	STAM_PROFILE_START(&pTimer->StatTimer, PrfTimer);
2383	switch (pTimer->enmType)
2384	{
2385	case TMTIMERTYPE_DEV: pTimer->u.Dev.pfnTimer(pTimer->u.Dev.pDevIns, pTimer->hSelf, pTimer->pvUser); break;
2386	case TMTIMERTYPE_USB: pTimer->u.Usb.pfnTimer(pTimer->u.Usb.pUsbIns, pTimer->hSelf, pTimer->pvUser); break;
2387	case TMTIMERTYPE_DRV: pTimer->u.Drv.pfnTimer(pTimer->u.Drv.pDrvIns, pTimer->hSelf, pTimer->pvUser); break;
2388	case TMTIMERTYPE_INTERNAL: pTimer->u.Internal.pfnTimer(pVM, pTimer->hSelf, pTimer->pvUser); break;
2389	default:
2390	AssertMsgFailed(("Invalid timer type %d (%s)\n", pTimer->enmType, pTimer->szName));
2391	break;
2392	}
2393	STAM_PROFILE_STOP(&pTimer->StatTimer, PrfTimer);
2394
2395	/* change the state if it wasn't changed already in the handler. */
2396	TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_STOPPED, TMTIMERSTATE_EXPIRED_DELIVER, fRc);
2397	Log2(("tmR3TimerQueueRun: new state %s\n", tmTimerState(pTimer->enmState)));
2398	}
2399	if (pCritSect)
2400	PDMCritSectLeave(pVM, pCritSect);
2401
2402	/* Advance? */
2403	pTimer = pNext;
2404	if (!pTimer)
2405	break;
2406	} /* run loop */
2407	}
2408
2409
2410	/**
2411	* Service one regular timer queue.
2412	*
2413	* @param pVM The cross context VM structure.
2414	* @param pQueue The queue.
2415	*/
2416	static void tmR3TimerQueueDoOne(PVM pVM, PTMTIMERQUEUE pQueue)
2417	{
2418	Assert(pQueue->enmClock != TMCLOCK_VIRTUAL_SYNC);
2419
2420	/*
2421	* Only one thread should be "doing" the queue.
2422	*/
2423	if (ASMAtomicCmpXchgBool(&pQueue->fBeingProcessed, true, false))
2424	{
2425	STAM_PROFILE_START(&pQueue->StatDo, s);
2426	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
2427
2428	if (pQueue->idxSchedule != UINT32_MAX)
2429	tmTimerQueueSchedule(pVM, pQueue, pQueue);
2430
2431	PTMTIMER pHead = tmTimerQueueGetHead(pQueue, pQueue);
2432	if (pHead)
2433	tmR3TimerQueueRun(pVM, pQueue, pHead);
2434
2435	PDMCritSectLeave(pVM, &pQueue->TimerLock);
2436	STAM_PROFILE_STOP(&pQueue->StatDo, s);
2437	ASMAtomicWriteBool(&pQueue->fBeingProcessed, false);
2438	}
2439	}
2440
2441
2442	/**
2443	* Schedules and runs any pending times in the timer queue for the
2444	* synchronous virtual clock.
2445	*
2446	* This scheduling is a bit different from the other queues as it need
2447	* to implement the special requirements of the timer synchronous virtual
2448	* clock, thus this 2nd queue run function.
2449	*
2450	* @param pVM The cross context VM structure.
2451	*
2452	* @remarks The caller must the Virtual Sync lock. Owning the TM lock is no
2453	* longer important.
2454	*/
2455	static void tmR3TimerQueueRunVirtualSync(PVM pVM)
2456	{
2457	PTMTIMERQUEUE const pQueue = &pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC];
2458	VM_ASSERT_EMT(pVM);
2459	Assert(PDMCritSectIsOwner(pVM, &pVM->tm.s.VirtualSyncLock));
2460
2461	/*
2462	* Any timers?
2463	*/
2464	PTMTIMER pNext = tmTimerQueueGetHead(pQueue, pQueue);
2465	if (RT_UNLIKELY(!pNext))
2466	{
2467	Assert(pVM->tm.s.fVirtualSyncTicking \|\| !pVM->tm.s.cVirtualTicking);
2468	return;
2469	}
2470	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncRun);
2471
2472	/*
2473	* Calculate the time frame for which we will dispatch timers.
2474	*
2475	* We use a time frame ranging from the current sync time (which is most likely the
2476	* same as the head timer) and some configurable period (100000ns) up towards the
2477	* current virtual time. This period might also need to be restricted by the catch-up
2478	* rate so frequent calls to this function won't accelerate the time too much, however
2479	* this will be implemented at a later point if necessary.
2480	*
2481	* Without this frame we would 1) having to run timers much more frequently
2482	* and 2) lag behind at a steady rate.
2483	*/
2484	const uint64_t u64VirtualNow = TMVirtualGetNoCheck(pVM);
2485	uint64_t const offSyncGivenUp = pVM->tm.s.offVirtualSyncGivenUp;
2486	uint64_t u64Now;
2487	if (!pVM->tm.s.fVirtualSyncTicking)
2488	{
2489	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncRunStoppedAlready);
2490	u64Now = pVM->tm.s.u64VirtualSync;
2491	Assert(u64Now <= pNext->u64Expire);
2492	}
2493	else
2494	{
2495	/* Calc 'now'. */
2496	bool fStopCatchup = false;
2497	bool fUpdateStuff = false;
2498	uint64_t off = pVM->tm.s.offVirtualSync;
2499	if (pVM->tm.s.fVirtualSyncCatchUp)
2500	{
2501	uint64_t u64Delta = u64VirtualNow - pVM->tm.s.u64VirtualSyncCatchUpPrev;
2502	if (RT_LIKELY(!(u64Delta >> 32)))
2503	{
2504	uint64_t u64Sub = ASMMultU64ByU32DivByU32(u64Delta, pVM->tm.s.u32VirtualSyncCatchUpPercentage, 100);
2505	if (off > u64Sub + offSyncGivenUp)
2506	{
2507	off -= u64Sub;
2508	Log4(("TM: %'RU64/-%'8RU64: sub %'RU64 [tmR3TimerQueueRunVirtualSync]\n", u64VirtualNow - off, off - offSyncGivenUp, u64Sub));
2509	}
2510	else
2511	{
2512	STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatVirtualSyncCatchup, c);
2513	fStopCatchup = true;
2514	off = offSyncGivenUp;
2515	}
2516	fUpdateStuff = true;
2517	}
2518	}
2519	u64Now = u64VirtualNow - off;
2520
2521	/* Adjust against last returned time. */
2522	uint64_t u64Last = ASMAtomicUoReadU64(&pVM->tm.s.u64VirtualSync);
2523	if (u64Last > u64Now)
2524	{
2525	u64Now = u64Last + 1;
2526	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncGetAdjLast);
2527	}
2528
2529	/* Check if stopped by expired timer. */
2530	uint64_t const u64Expire = pNext->u64Expire;
2531	if (u64Now >= u64Expire)
2532	{
2533	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncRunStop);
2534	u64Now = u64Expire;
2535	ASMAtomicWriteU64(&pVM->tm.s.u64VirtualSync, u64Now);
2536	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncTicking, false);
2537	Log4(("TM: %'RU64/-%'8RU64: exp tmr [tmR3TimerQueueRunVirtualSync]\n", u64Now, u64VirtualNow - u64Now - offSyncGivenUp));
2538	}
2539	else
2540	{
2541	ASMAtomicWriteU64(&pVM->tm.s.u64VirtualSync, u64Now);
2542	if (fUpdateStuff)
2543	{
2544	ASMAtomicWriteU64(&pVM->tm.s.offVirtualSync, off);
2545	ASMAtomicWriteU64(&pVM->tm.s.u64VirtualSyncCatchUpPrev, u64VirtualNow);
2546	ASMAtomicWriteU64(&pVM->tm.s.u64VirtualSync, u64Now);
2547	if (fStopCatchup)
2548	{
2549	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncCatchUp, false);
2550	Log4(("TM: %'RU64/0: caught up [tmR3TimerQueueRunVirtualSync]\n", u64VirtualNow));
2551	}
2552	}
2553	}
2554	}
2555
2556	/* calc end of frame. */
2557	uint64_t u64Max = u64Now + pVM->tm.s.u32VirtualSyncScheduleSlack;
2558	if (u64Max > u64VirtualNow - offSyncGivenUp)
2559	u64Max = u64VirtualNow - offSyncGivenUp;
2560
2561	/* assert sanity */
2562	Assert(u64Now <= u64VirtualNow - offSyncGivenUp);
2563	Assert(u64Max <= u64VirtualNow - offSyncGivenUp);
2564	Assert(u64Now <= u64Max);
2565	Assert(offSyncGivenUp == pVM->tm.s.offVirtualSyncGivenUp);
2566
2567	/*
2568	* Process the expired timers moving the clock along as we progress.
2569	*/
2570	#ifdef VBOX_STRICT
2571	uint64_t u64Prev = u64Now; NOREF(u64Prev);
2572	#endif
2573	while (pNext && pNext->u64Expire <= u64Max)
2574	{
2575	/* Advance */
2576	PTMTIMER pTimer = pNext;
2577	pNext = tmTimerGetNext(pQueue, pTimer);
2578
2579	/* Take the associated lock. */
2580	PPDMCRITSECT pCritSect = pTimer->pCritSect;
2581	if (pCritSect)
2582	{
2583	STAM_PROFILE_START(&pTimer->StatCritSectEnter, Locking);
2584	PDMCritSectEnter(pVM, pCritSect, VERR_IGNORED);
2585	STAM_PROFILE_STOP(&pTimer->StatCritSectEnter, Locking);
2586	}
2587
2588	Log2(("tmR3TimerQueueRunVirtualSync: %p:{.enmState=%s, .enmClock=%d, .enmType=%d, u64Expire=%llx (now=%llx) .szName='%s'}\n",
2589	pTimer, tmTimerState(pTimer->enmState), pQueue->enmClock, pTimer->enmType, pTimer->u64Expire, u64Now, pTimer->szName));
2590
2591	/* Advance the clock - don't permit timers to be out of order or armed
2592	in the 'past'. */
2593	#ifdef VBOX_STRICT
2594	AssertMsg(pTimer->u64Expire >= u64Prev, ("%'RU64 < %'RU64 %s\n", pTimer->u64Expire, u64Prev, pTimer->szName));
2595	u64Prev = pTimer->u64Expire;
2596	#endif
2597	ASMAtomicWriteU64(&pVM->tm.s.u64VirtualSync, pTimer->u64Expire);
2598	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncTicking, false);
2599
2600	/* Unlink it, change the state and do the callout. */
2601	tmTimerQueueUnlinkActive(pVM, pQueue, pQueue, pTimer);
2602	TM_SET_STATE(pTimer, TMTIMERSTATE_EXPIRED_DELIVER);
2603	STAM_PROFILE_START(&pTimer->StatTimer, PrfTimer);
2604	switch (pTimer->enmType)
2605	{
2606	case TMTIMERTYPE_DEV: pTimer->u.Dev.pfnTimer(pTimer->u.Dev.pDevIns, pTimer->hSelf, pTimer->pvUser); break;
2607	case TMTIMERTYPE_USB: pTimer->u.Usb.pfnTimer(pTimer->u.Usb.pUsbIns, pTimer->hSelf, pTimer->pvUser); break;
2608	case TMTIMERTYPE_DRV: pTimer->u.Drv.pfnTimer(pTimer->u.Drv.pDrvIns, pTimer->hSelf, pTimer->pvUser); break;
2609	case TMTIMERTYPE_INTERNAL: pTimer->u.Internal.pfnTimer(pVM, pTimer->hSelf, pTimer->pvUser); break;
2610	default:
2611	AssertMsgFailed(("Invalid timer type %d (%s)\n", pTimer->enmType, pTimer->szName));
2612	break;
2613	}
2614	STAM_PROFILE_STOP(&pTimer->StatTimer, PrfTimer);
2615
2616	/* Change the state if it wasn't changed already in the handler.
2617	Reset the Hz hint too since this is the same as TMTimerStop. */
2618	bool fRc;
2619	TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_STOPPED, TMTIMERSTATE_EXPIRED_DELIVER, fRc);
2620	if (fRc && pTimer->uHzHint)
2621	{
2622	if (pTimer->uHzHint >= pQueue->uMaxHzHint)
2623	ASMAtomicOrU64(&pVM->tm.s.HzHint.u64Combined, RT_BIT_32(TMCLOCK_VIRTUAL_SYNC) \| RT_BIT_32(TMCLOCK_VIRTUAL_SYNC + 16));
2624	pTimer->uHzHint = 0;
2625	}
2626	Log2(("tmR3TimerQueueRunVirtualSync: new state %s\n", tmTimerState(pTimer->enmState)));
2627
2628	/* Leave the associated lock. */
2629	if (pCritSect)
2630	PDMCritSectLeave(pVM, pCritSect);
2631	} /* run loop */
2632
2633
2634	/*
2635	* Restart the clock if it was stopped to serve any timers,
2636	* and start/adjust catch-up if necessary.
2637	*/
2638	if ( !pVM->tm.s.fVirtualSyncTicking
2639	&& pVM->tm.s.cVirtualTicking)
2640	{
2641	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncRunRestart);
2642
2643	/* calc the slack we've handed out. */
2644	const uint64_t u64VirtualNow2 = TMVirtualGetNoCheck(pVM);
2645	Assert(u64VirtualNow2 >= u64VirtualNow);
2646	AssertMsg(pVM->tm.s.u64VirtualSync >= u64Now, ("%'RU64 < %'RU64\n", pVM->tm.s.u64VirtualSync, u64Now));
2647	const uint64_t offSlack = pVM->tm.s.u64VirtualSync - u64Now;
2648	STAM_STATS({
2649	if (offSlack)
2650	{
2651	PSTAMPROFILE p = &pVM->tm.s.StatVirtualSyncRunSlack;
2652	p->cPeriods++;
2653	p->cTicks += offSlack;
2654	if (p->cTicksMax < offSlack) p->cTicksMax = offSlack;
2655	if (p->cTicksMin > offSlack) p->cTicksMin = offSlack;
2656	}
2657	});
2658
2659	/* Let the time run a little bit while we were busy running timers(?). */
2660	uint64_t u64Elapsed;
2661	#define MAX_ELAPSED 30000U /* ns */
2662	if (offSlack > MAX_ELAPSED)
2663	u64Elapsed = 0;
2664	else
2665	{
2666	u64Elapsed = u64VirtualNow2 - u64VirtualNow;
2667	if (u64Elapsed > MAX_ELAPSED)
2668	u64Elapsed = MAX_ELAPSED;
2669	u64Elapsed = u64Elapsed > offSlack ? u64Elapsed - offSlack : 0;
2670	}
2671	#undef MAX_ELAPSED
2672
2673	/* Calc the current offset. */
2674	uint64_t offNew = u64VirtualNow2 - pVM->tm.s.u64VirtualSync - u64Elapsed;
2675	Assert(!(offNew & RT_BIT_64(63)));
2676	uint64_t offLag = offNew - pVM->tm.s.offVirtualSyncGivenUp;
2677	Assert(!(offLag & RT_BIT_64(63)));
2678
2679	/*
2680	* Deal with starting, adjusting and stopping catchup.
2681	*/
2682	if (pVM->tm.s.fVirtualSyncCatchUp)
2683	{
2684	if (offLag <= pVM->tm.s.u64VirtualSyncCatchUpStopThreshold)
2685	{
2686	/* stop */
2687	STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatVirtualSyncCatchup, c);
2688	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncCatchUp, false);
2689	Log4(("TM: %'RU64/-%'8RU64: caught up [pt]\n", u64VirtualNow2 - offNew, offLag));
2690	}
2691	else if (offLag <= pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold)
2692	{
2693	/* adjust */
2694	unsigned i = 0;
2695	while ( i + 1 < RT_ELEMENTS(pVM->tm.s.aVirtualSyncCatchUpPeriods)
2696	&& offLag >= pVM->tm.s.aVirtualSyncCatchUpPeriods[i + 1].u64Start)
2697	i++;
2698	if (pVM->tm.s.u32VirtualSyncCatchUpPercentage < pVM->tm.s.aVirtualSyncCatchUpPeriods[i].u32Percentage)
2699	{
2700	STAM_COUNTER_INC(&pVM->tm.s.aStatVirtualSyncCatchupAdjust[i]);
2701	ASMAtomicWriteU32(&pVM->tm.s.u32VirtualSyncCatchUpPercentage, pVM->tm.s.aVirtualSyncCatchUpPeriods[i].u32Percentage);
2702	Log4(("TM: %'RU64/%'8RU64: adj %u%%\n", u64VirtualNow2 - offNew, offLag, pVM->tm.s.u32VirtualSyncCatchUpPercentage));
2703	}
2704	pVM->tm.s.u64VirtualSyncCatchUpPrev = u64VirtualNow2;
2705	}
2706	else
2707	{
2708	/* give up */
2709	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncGiveUp);
2710	STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatVirtualSyncCatchup, c);
2711	ASMAtomicWriteU64((uint64_t volatile *)&pVM->tm.s.offVirtualSyncGivenUp, offNew);
2712	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncCatchUp, false);
2713	Log4(("TM: %'RU64/%'8RU64: give up %u%%\n", u64VirtualNow2 - offNew, offLag, pVM->tm.s.u32VirtualSyncCatchUpPercentage));
2714	LogRel(("TM: Giving up catch-up attempt at a %'RU64 ns lag; new total: %'RU64 ns\n", offLag, offNew));
2715	}
2716	}
2717	else if (offLag >= pVM->tm.s.aVirtualSyncCatchUpPeriods[0].u64Start)
2718	{
2719	if (offLag <= pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold)
2720	{
2721	/* start */
2722	STAM_PROFILE_ADV_START(&pVM->tm.s.StatVirtualSyncCatchup, c);
2723	unsigned i = 0;
2724	while ( i + 1 < RT_ELEMENTS(pVM->tm.s.aVirtualSyncCatchUpPeriods)
2725	&& offLag >= pVM->tm.s.aVirtualSyncCatchUpPeriods[i + 1].u64Start)
2726	i++;
2727	STAM_COUNTER_INC(&pVM->tm.s.aStatVirtualSyncCatchupInitial[i]);
2728	ASMAtomicWriteU32(&pVM->tm.s.u32VirtualSyncCatchUpPercentage, pVM->tm.s.aVirtualSyncCatchUpPeriods[i].u32Percentage);
2729	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncCatchUp, true);
2730	Log4(("TM: %'RU64/%'8RU64: catch-up %u%%\n", u64VirtualNow2 - offNew, offLag, pVM->tm.s.u32VirtualSyncCatchUpPercentage));
2731	}
2732	else
2733	{
2734	/* don't bother */
2735	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncGiveUpBeforeStarting);
2736	ASMAtomicWriteU64((uint64_t volatile *)&pVM->tm.s.offVirtualSyncGivenUp, offNew);
2737	Log4(("TM: %'RU64/%'8RU64: give up\n", u64VirtualNow2 - offNew, offLag));
2738	LogRel(("TM: Not bothering to attempt catching up a %'RU64 ns lag; new total: %'RU64\n", offLag, offNew));
2739	}
2740	}
2741
2742	/*
2743	* Update the offset and restart the clock.
2744	*/
2745	Assert(!(offNew & RT_BIT_64(63)));
2746	ASMAtomicWriteU64(&pVM->tm.s.offVirtualSync, offNew);
2747	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncTicking, true);
2748	}
2749	}
2750
2751
2752	/**
2753	* Deals with stopped Virtual Sync clock.
2754	*
2755	* This is called by the forced action flag handling code in EM when it
2756	* encounters the VM_FF_TM_VIRTUAL_SYNC flag. It is called by all VCPUs and they
2757	* will block on the VirtualSyncLock until the pending timers has been executed
2758	* and the clock restarted.
2759	*
2760	* @param pVM The cross context VM structure.
2761	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
2762	*
2763	* @thread EMTs
2764	*/
2765	VMMR3_INT_DECL(void) TMR3VirtualSyncFF(PVM pVM, PVMCPU pVCpu)
2766	{
2767	Log2(("TMR3VirtualSyncFF:\n"));
2768
2769	/*
2770	* The EMT doing the timers is diverted to them.
2771	*/
2772	if (pVCpu->idCpu == pVM->tm.s.idTimerCpu)
2773	TMR3TimerQueuesDo(pVM);
2774	/*
2775	* The other EMTs will block on the virtual sync lock and the first owner
2776	* will run the queue and thus restarting the clock.
2777	*
2778	* Note! This is very suboptimal code wrt to resuming execution when there
2779	* are more than two Virtual CPUs, since they will all have to enter
2780	* the critical section one by one. But it's a very simple solution
2781	* which will have to do the job for now.
2782	*/
2783	else
2784	{
2785	/** @todo Optimize for SMP */
2786	STAM_PROFILE_START(&pVM->tm.s.StatVirtualSyncFF, a);
2787	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED);
2788	if (pVM->tm.s.fVirtualSyncTicking)
2789	{
2790	STAM_PROFILE_STOP(&pVM->tm.s.StatVirtualSyncFF, a); /* before the unlock! */
2791	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
2792	Log2(("TMR3VirtualSyncFF: ticking\n"));
2793	}
2794	else
2795	{
2796	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
2797
2798	/* try run it. */
2799	PDMCritSectEnter(pVM, &pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL].TimerLock, VERR_IGNORED);
2800	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED);
2801	if (pVM->tm.s.fVirtualSyncTicking)
2802	Log2(("TMR3VirtualSyncFF: ticking (2)\n"));
2803	else
2804	{
2805	ASMAtomicWriteBool(&pVM->tm.s.fRunningVirtualSyncQueue, true);
2806	Log2(("TMR3VirtualSyncFF: running queue\n"));
2807
2808	Assert(pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC].idxSchedule == UINT32_MAX);
2809	tmR3TimerQueueRunVirtualSync(pVM);
2810	if (pVM->tm.s.fVirtualSyncTicking) /** @todo move into tmR3TimerQueueRunVirtualSync - FIXME */
2811	VM_FF_CLEAR(pVM, VM_FF_TM_VIRTUAL_SYNC);
2812
2813	ASMAtomicWriteBool(&pVM->tm.s.fRunningVirtualSyncQueue, false);
2814	}
2815	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
2816	STAM_PROFILE_STOP(&pVM->tm.s.StatVirtualSyncFF, a); /* before the unlock! */
2817	PDMCritSectLeave(pVM, &pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL].TimerLock);
2818	}
2819	}
2820	}
2821
2822
2823	/**
2824	* Service the special virtual sync timer queue.
2825	*
2826	* @param pVM The cross context VM structure.
2827	* @param pVCpuDst The destination VCpu.
2828	*/
2829	static void tmR3TimerQueueDoVirtualSync(PVM pVM, PVMCPU pVCpuDst)
2830	{
2831	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC];
2832	if (ASMAtomicCmpXchgBool(&pQueue->fBeingProcessed, true, false))
2833	{
2834	STAM_PROFILE_START(&pQueue->StatDo, s1);
2835	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
2836	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED);
2837	ASMAtomicWriteBool(&pVM->tm.s.fRunningVirtualSyncQueue, true);
2838	VMCPU_FF_CLEAR(pVCpuDst, VMCPU_FF_TIMER); /* Clear the FF once we started working for real. */
2839
2840	Assert(pQueue->idxSchedule == UINT32_MAX);
2841	tmR3TimerQueueRunVirtualSync(pVM);
2842	if (pVM->tm.s.fVirtualSyncTicking) /** @todo move into tmR3TimerQueueRunVirtualSync - FIXME */
2843	VM_FF_CLEAR(pVM, VM_FF_TM_VIRTUAL_SYNC);
2844
2845	ASMAtomicWriteBool(&pVM->tm.s.fRunningVirtualSyncQueue, false);
2846	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
2847	PDMCritSectLeave(pVM, &pQueue->TimerLock);
2848	STAM_PROFILE_STOP(&pQueue->StatDo, s1);
2849	ASMAtomicWriteBool(&pQueue->fBeingProcessed, false);
2850	}
2851	}
2852
2853
2854	/**
2855	* Schedules and runs any pending timers.
2856	*
2857	* This is normally called from a forced action handler in EMT.
2858	*
2859	* @param pVM The cross context VM structure.
2860	*
2861	* @thread EMT (actually EMT0, but we fend off the others)
2862	*/
2863	VMMR3DECL(void) TMR3TimerQueuesDo(PVM pVM)
2864	{
2865	/*
2866	* Only the dedicated timer EMT should do stuff here.
2867	* (fRunningQueues is only used as an indicator.)
2868	*/
2869	Assert(pVM->tm.s.idTimerCpu < pVM->cCpus);
2870	PVMCPU pVCpuDst = pVM->apCpusR3[pVM->tm.s.idTimerCpu];
2871	if (VMMGetCpu(pVM) != pVCpuDst)
2872	{
2873	Assert(pVM->cCpus > 1);
2874	return;
2875	}
2876	STAM_PROFILE_START(&pVM->tm.s.StatDoQueues, a);
2877	Log2(("TMR3TimerQueuesDo:\n"));
2878	Assert(!pVM->tm.s.fRunningQueues);
2879	ASMAtomicWriteBool(&pVM->tm.s.fRunningQueues, true);
2880
2881	/*
2882	* Process the queues.
2883	*/
2884	AssertCompile(TMCLOCK_MAX == 4);
2885
2886	/*
2887	* TMCLOCK_VIRTUAL_SYNC (see also TMR3VirtualSyncFF)
2888	*/
2889	tmR3TimerQueueDoVirtualSync(pVM, pVCpuDst);
2890
2891	/*
2892	* TMCLOCK_VIRTUAL
2893	*/
2894	tmR3TimerQueueDoOne(pVM, &pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL]);
2895
2896	/*
2897	* TMCLOCK_TSC
2898	*/
2899	Assert(pVM->tm.s.aTimerQueues[TMCLOCK_TSC].idxActive == UINT32_MAX); /* not used */
2900
2901	/*
2902	* TMCLOCK_REAL
2903	*/
2904	tmR3TimerQueueDoOne(pVM, &pVM->tm.s.aTimerQueues[TMCLOCK_REAL]);
2905
2906	#ifdef VBOX_STRICT
2907	/* check that we didn't screw up. */
2908	tmTimerQueuesSanityChecks(pVM, "TMR3TimerQueuesDo");
2909	#endif
2910
2911	/* done */
2912	Log2(("TMR3TimerQueuesDo: returns void\n"));
2913	ASMAtomicWriteBool(&pVM->tm.s.fRunningQueues, false);
2914	STAM_PROFILE_STOP(&pVM->tm.s.StatDoQueues, a);
2915	}
2916
2917
2918
2919	/** @name Saved state values
2920	* @{ */
2921	#define TMTIMERSTATE_SAVED_PENDING_STOP 4
2922	#define TMTIMERSTATE_SAVED_PENDING_SCHEDULE 7
2923	/** @} */
2924
2925
2926	/**
2927	* Saves the state of a timer to a saved state.
2928	*
2929	* @returns VBox status code.
2930	* @param pVM The cross context VM structure.
2931	* @param hTimer Timer to save.
2932	* @param pSSM Save State Manager handle.
2933	*/
2934	VMMR3DECL(int) TMR3TimerSave(PVM pVM, TMTIMERHANDLE hTimer, PSSMHANDLE pSSM)
2935	{
2936	VM_ASSERT_EMT(pVM);
2937	TMTIMER_HANDLE_TO_VARS_RETURN(pVM, hTimer); /* => pTimer, pQueueCC, pQueue, idxTimer, idxQueue */
2938	LogFlow(("TMR3TimerSave: %p:{enmState=%s, .szName='%s'} pSSM=%p\n", pTimer, tmTimerState(pTimer->enmState), pTimer->szName, pSSM));
2939
2940	switch (pTimer->enmState)
2941	{
2942	case TMTIMERSTATE_STOPPED:
2943	case TMTIMERSTATE_PENDING_STOP:
2944	case TMTIMERSTATE_PENDING_STOP_SCHEDULE:
2945	return SSMR3PutU8(pSSM, TMTIMERSTATE_SAVED_PENDING_STOP);
2946
2947	case TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE:
2948	case TMTIMERSTATE_PENDING_RESCHEDULE_SET_EXPIRE:
2949	AssertMsgFailed(("u64Expire is being updated! (%s)\n", pTimer->szName));
2950	if (!RTThreadYield())
2951	RTThreadSleep(1);
2952	RT_FALL_THRU();
2953	case TMTIMERSTATE_ACTIVE:
2954	case TMTIMERSTATE_PENDING_SCHEDULE:
2955	case TMTIMERSTATE_PENDING_RESCHEDULE:
2956	SSMR3PutU8(pSSM, TMTIMERSTATE_SAVED_PENDING_SCHEDULE);
2957	return SSMR3PutU64(pSSM, pTimer->u64Expire);
2958
2959	case TMTIMERSTATE_EXPIRED_GET_UNLINK:
2960	case TMTIMERSTATE_EXPIRED_DELIVER:
2961	case TMTIMERSTATE_DESTROY:
2962	case TMTIMERSTATE_FREE:
2963	case TMTIMERSTATE_INVALID:
2964	AssertMsgFailed(("Invalid timer state %d %s (%s)\n", pTimer->enmState, tmTimerState(pTimer->enmState), pTimer->szName));
2965	return SSMR3HandleSetStatus(pSSM, VERR_TM_INVALID_STATE);
2966	}
2967
2968	AssertMsgFailed(("Unknown timer state %d (%s)\n", pTimer->enmState, pTimer->szName));
2969	return SSMR3HandleSetStatus(pSSM, VERR_TM_UNKNOWN_STATE);
2970	}
2971
2972
2973	/**
2974	* Loads the state of a timer from a saved state.
2975	*
2976	* @returns VBox status code.
2977	* @param pVM The cross context VM structure.
2978	* @param hTimer Handle of Timer to restore.
2979	* @param pSSM Save State Manager handle.
2980	*/
2981	VMMR3DECL(int) TMR3TimerLoad(PVM pVM, TMTIMERHANDLE hTimer, PSSMHANDLE pSSM)
2982	{
2983	VM_ASSERT_EMT(pVM);
2984	TMTIMER_HANDLE_TO_VARS_RETURN(pVM, hTimer); /* => pTimer, pQueueCC, pQueue, idxTimer, idxQueue */
2985	Assert(pSSM);
2986	LogFlow(("TMR3TimerLoad: %p:{enmState=%s, .szName='%s'} pSSM=%p\n", pTimer, tmTimerState(pTimer->enmState), pTimer->szName, pSSM));
2987
2988	/*
2989	* Load the state and validate it.
2990	*/
2991	uint8_t u8State;
2992	int rc = SSMR3GetU8(pSSM, &u8State);
2993	if (RT_FAILURE(rc))
2994	return rc;
2995
2996	/* TMTIMERSTATE_SAVED_XXX: Workaround for accidental state shift in r47786 (2009-05-26 19:12:12). */
2997	if ( u8State == TMTIMERSTATE_SAVED_PENDING_STOP + 1
2998	\|\| u8State == TMTIMERSTATE_SAVED_PENDING_SCHEDULE + 1)
2999	u8State--;
3000
3001	if ( u8State != TMTIMERSTATE_SAVED_PENDING_STOP
3002	&& u8State != TMTIMERSTATE_SAVED_PENDING_SCHEDULE)
3003	{
3004	AssertLogRelMsgFailed(("u8State=%d\n", u8State));
3005	return SSMR3HandleSetStatus(pSSM, VERR_TM_LOAD_STATE);
3006	}
3007
3008	/* Enter the critical sections to make TMTimerSet/Stop happy. */
3009	if (pQueue->enmClock == TMCLOCK_VIRTUAL_SYNC)
3010	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED);
3011	PPDMCRITSECT pCritSect = pTimer->pCritSect;
3012	if (pCritSect)
3013	PDMCritSectEnter(pVM, pCritSect, VERR_IGNORED);
3014
3015	if (u8State == TMTIMERSTATE_SAVED_PENDING_SCHEDULE)
3016	{
3017	/*
3018	* Load the expire time.
3019	*/
3020	uint64_t u64Expire;
3021	rc = SSMR3GetU64(pSSM, &u64Expire);
3022	if (RT_FAILURE(rc))
3023	return rc;
3024
3025	/*
3026	* Set it.
3027	*/
3028	Log(("u8State=%d u64Expire=%llu\n", u8State, u64Expire));
3029	rc = TMTimerSet(pVM, hTimer, u64Expire);
3030	}
3031	else
3032	{
3033	/*
3034	* Stop it.
3035	*/
3036	Log(("u8State=%d\n", u8State));
3037	rc = TMTimerStop(pVM, hTimer);
3038	}
3039
3040	if (pCritSect)
3041	PDMCritSectLeave(pVM, pCritSect);
3042	if (pQueue->enmClock == TMCLOCK_VIRTUAL_SYNC)
3043	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
3044
3045	/*
3046	* On failure set SSM status.
3047	*/
3048	if (RT_FAILURE(rc))
3049	rc = SSMR3HandleSetStatus(pSSM, rc);
3050	return rc;
3051	}
3052
3053
3054	/**
3055	* Skips the state of a timer in a given saved state.
3056	*
3057	* @returns VBox status.
3058	* @param pSSM Save State Manager handle.
3059	* @param pfActive Where to store whether the timer was active
3060	* when the state was saved.
3061	*/
3062	VMMR3DECL(int) TMR3TimerSkip(PSSMHANDLE pSSM, bool *pfActive)
3063	{
3064	Assert(pSSM); AssertPtr(pfActive);
3065	LogFlow(("TMR3TimerSkip: pSSM=%p pfActive=%p\n", pSSM, pfActive));
3066
3067	/*
3068	* Load the state and validate it.
3069	*/
3070	uint8_t u8State;
3071	int rc = SSMR3GetU8(pSSM, &u8State);
3072	if (RT_FAILURE(rc))
3073	return rc;
3074
3075	/* TMTIMERSTATE_SAVED_XXX: Workaround for accidental state shift in r47786 (2009-05-26 19:12:12). */
3076	if ( u8State == TMTIMERSTATE_SAVED_PENDING_STOP + 1
3077	\|\| u8State == TMTIMERSTATE_SAVED_PENDING_SCHEDULE + 1)
3078	u8State--;
3079
3080	if ( u8State != TMTIMERSTATE_SAVED_PENDING_STOP
3081	&& u8State != TMTIMERSTATE_SAVED_PENDING_SCHEDULE)
3082	{
3083	AssertLogRelMsgFailed(("u8State=%d\n", u8State));
3084	return SSMR3HandleSetStatus(pSSM, VERR_TM_LOAD_STATE);
3085	}
3086
3087	*pfActive = (u8State == TMTIMERSTATE_SAVED_PENDING_SCHEDULE);
3088	if (*pfActive)
3089	{
3090	/*
3091	* Load the expire time.
3092	*/
3093	uint64_t u64Expire;
3094	rc = SSMR3GetU64(pSSM, &u64Expire);
3095	}
3096
3097	return rc;
3098	}
3099
3100
3101	/**
3102	* Associates a critical section with a timer.
3103	*
3104	* The critical section will be entered prior to doing the timer call back, thus
3105	* avoiding potential races between the timer thread and other threads trying to
3106	* stop or adjust the timer expiration while it's being delivered. The timer
3107	* thread will leave the critical section when the timer callback returns.
3108	*
3109	* In strict builds, ownership of the critical section will be asserted by
3110	* TMTimerSet, TMTimerStop, TMTimerGetExpire and TMTimerDestroy (when called at
3111	* runtime).
3112	*
3113	* @retval VINF_SUCCESS on success.
3114	* @retval VERR_INVALID_HANDLE if the timer handle is NULL or invalid
3115	* (asserted).
3116	* @retval VERR_INVALID_PARAMETER if pCritSect is NULL or has an invalid magic
3117	* (asserted).
3118	* @retval VERR_ALREADY_EXISTS if a critical section was already associated
3119	* with the timer (asserted).
3120	* @retval VERR_INVALID_STATE if the timer isn't stopped.
3121	*
3122	* @param pVM The cross context VM structure.
3123	* @param hTimer The timer handle.
3124	* @param pCritSect The critical section. The caller must make sure this
3125	* is around for the life time of the timer.
3126	*
3127	* @thread Any, but the caller is responsible for making sure the timer is not
3128	* active.
3129	*/
3130	VMMR3DECL(int) TMR3TimerSetCritSect(PVM pVM, TMTIMERHANDLE hTimer, PPDMCRITSECT pCritSect)
3131	{
3132	TMTIMER_HANDLE_TO_VARS_RETURN(pVM, hTimer); /* => pTimer, pQueueCC, pQueue, idxTimer, idxQueue */
3133	AssertPtrReturn(pCritSect, VERR_INVALID_PARAMETER);
3134	const char pszName = PDMR3CritSectName(pCritSect); / exploited for validation */
3135	AssertReturn(pszName, VERR_INVALID_PARAMETER);
3136	AssertReturn(!pTimer->pCritSect, VERR_ALREADY_EXISTS);
3137	AssertReturn(pTimer->enmState == TMTIMERSTATE_STOPPED, VERR_INVALID_STATE);
3138	AssertReturn( pTimer->enmType == TMTIMERTYPE_DEV
3139	\|\| pTimer->enmType == TMTIMERTYPE_DRV
3140	\|\| pTimer->enmType == TMTIMERTYPE_USB,
3141	VERR_NOT_SUPPORTED); /* Not supported on internal timers, see tmRZTimerGetCritSect. */
3142	LogFlow(("pTimer=%p (%s) pCritSect=%p (%s)\n", pTimer, pTimer->szName, pCritSect, pszName));
3143
3144	pTimer->pCritSect = pCritSect;
3145	return VINF_SUCCESS;
3146	}
3147
3148
3149	/**
3150	* Get the real world UTC time adjusted for VM lag.
3151	*
3152	* @returns pTime.
3153	* @param pVM The cross context VM structure.
3154	* @param pTime Where to store the time.
3155	*/
3156	VMMR3_INT_DECL(PRTTIMESPEC) TMR3UtcNow(PVM pVM, PRTTIMESPEC pTime)
3157	{
3158	/*
3159	* Get a stable set of VirtualSync parameters and calc the lag.
3160	*/
3161	uint64_t offVirtualSync;
3162	uint64_t offVirtualSyncGivenUp;
3163	do
3164	{
3165	offVirtualSync = ASMAtomicReadU64(&pVM->tm.s.offVirtualSync);
3166	offVirtualSyncGivenUp = ASMAtomicReadU64((uint64_t volatile *)&pVM->tm.s.offVirtualSyncGivenUp);
3167	} while (ASMAtomicReadU64(&pVM->tm.s.offVirtualSync) != offVirtualSync);
3168
3169	Assert(offVirtualSync >= offVirtualSyncGivenUp);
3170	uint64_t const offLag = offVirtualSync - offVirtualSyncGivenUp;
3171
3172	/*
3173	* Get current time and adjust for virtual sync lag and do time displacement.
3174	*/
3175	RTTimeNow(pTime);
3176	RTTimeSpecSubNano(pTime, offLag);
3177	RTTimeSpecAddNano(pTime, pVM->tm.s.offUTC);
3178
3179	/*
3180	* Log details if the time changed radically (also triggers on first call).
3181	*/
3182	int64_t nsPrev = ASMAtomicXchgS64(&pVM->tm.s.nsLastUtcNow, RTTimeSpecGetNano(pTime));
3183	int64_t cNsDelta = RTTimeSpecGetNano(pTime) - nsPrev;
3184	if ((uint64_t)RT_ABS(cNsDelta) > RT_NS_1HOUR / 2)
3185	{
3186	RTTIMESPEC NowAgain;
3187	RTTimeNow(&NowAgain);
3188	LogRel(("TMR3UtcNow: nsNow=%'RI64 nsPrev=%'RI64 -> cNsDelta=%'RI64 (offLag=%'RI64 offVirtualSync=%'RU64 offVirtualSyncGivenUp=%'RU64, NowAgain=%'RI64)\n",
3189	RTTimeSpecGetNano(pTime), nsPrev, cNsDelta, offLag, offVirtualSync, offVirtualSyncGivenUp, RTTimeSpecGetNano(&NowAgain)));
3190	if (pVM->tm.s.pszUtcTouchFileOnJump && nsPrev != 0)
3191	{
3192	RTFILE hFile;
3193	int rc = RTFileOpen(&hFile, pVM->tm.s.pszUtcTouchFileOnJump,
3194	RTFILE_O_WRITE \| RTFILE_O_APPEND \| RTFILE_O_OPEN_CREATE \| RTFILE_O_DENY_NONE);
3195	if (RT_SUCCESS(rc))
3196	{
3197	char szMsg[256];
3198	size_t cch;
3199	cch = RTStrPrintf(szMsg, sizeof(szMsg),
3200	"TMR3UtcNow: nsNow=%'RI64 nsPrev=%'RI64 -> cNsDelta=%'RI64 (offLag=%'RI64 offVirtualSync=%'RU64 offVirtualSyncGivenUp=%'RU64, NowAgain=%'RI64)\n",
3201	RTTimeSpecGetNano(pTime), nsPrev, cNsDelta, offLag, offVirtualSync, offVirtualSyncGivenUp, RTTimeSpecGetNano(&NowAgain));
3202	RTFileWrite(hFile, szMsg, cch, NULL);
3203	RTFileClose(hFile);
3204	}
3205	}
3206	}
3207
3208	return pTime;
3209	}
3210
3211
3212	/**
3213	* Pauses all clocks except TMCLOCK_REAL.
3214	*
3215	* @returns VBox status code, all errors are asserted.
3216	* @param pVM The cross context VM structure.
3217	* @param pVCpu The cross context virtual CPU structure.
3218	* @thread EMT corresponding to Pointer to the VMCPU.
3219	*/
3220	VMMR3DECL(int) TMR3NotifySuspend(PVM pVM, PVMCPU pVCpu)
3221	{
3222	VMCPU_ASSERT_EMT(pVCpu);
3223	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED); /* Paranoia: Exploiting the virtual sync lock here. */
3224
3225	/*
3226	* The shared virtual clock (includes virtual sync which is tied to it).
3227	*/
3228	int rc = tmVirtualPauseLocked(pVM);
3229	AssertRCReturnStmt(rc, PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock), rc);
3230
3231	/*
3232	* Pause the TSC last since it is normally linked to the virtual
3233	* sync clock, so the above code may actually stop both clocks.
3234	*/
3235	if (!pVM->tm.s.fTSCTiedToExecution)
3236	{
3237	rc = tmCpuTickPauseLocked(pVM, pVCpu);
3238	AssertRCReturnStmt(rc, PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock), rc);
3239	}
3240
3241	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
3242	/*
3243	* Update cNsTotal and stats.
3244	*/
3245	Assert(!pVCpu->tm.s.fSuspended);
3246	uint64_t const cNsTotalNew = RTTimeNanoTS() - pVCpu->tm.s.nsStartTotal;
3247	uint64_t const cNsOtherNew = cNsTotalNew - pVCpu->tm.s.cNsExecuting - pVCpu->tm.s.cNsHalted;
3248
3249	# if defined(VBOX_WITH_STATISTICS) \|\| defined(VBOX_WITH_NS_ACCOUNTING_STATS)
3250	STAM_REL_COUNTER_ADD(&pVCpu->tm.s.StatNsTotal, cNsTotalNew - pVCpu->tm.s.cNsTotalStat);
3251	int64_t const cNsOtherNewDelta = cNsOtherNew - pVCpu->tm.s.cNsOtherStat;
3252	if (cNsOtherNewDelta > 0)
3253	STAM_REL_COUNTER_ADD(&pVCpu->tm.s.StatNsOther, (uint64_t)cNsOtherNewDelta);
3254	# endif
3255
3256	uint32_t uGen = ASMAtomicIncU32(&pVCpu->tm.s.uTimesGen); Assert(uGen & 1);
3257	pVCpu->tm.s.nsStartTotal = cNsTotalNew;
3258	pVCpu->tm.s.fSuspended = true;
3259	pVCpu->tm.s.cNsTotalStat = cNsTotalNew;
3260	pVCpu->tm.s.cNsOtherStat = cNsOtherNew;
3261	ASMAtomicWriteU32(&pVCpu->tm.s.uTimesGen, (uGen \| 1) + 1);
3262	#endif
3263
3264	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
3265	return VINF_SUCCESS;
3266	}
3267
3268
3269	/**
3270	* Resumes all clocks except TMCLOCK_REAL.
3271	*
3272	* @returns VBox status code, all errors are asserted.
3273	* @param pVM The cross context VM structure.
3274	* @param pVCpu The cross context virtual CPU structure.
3275	* @thread EMT corresponding to Pointer to the VMCPU.
3276	*/
3277	VMMR3DECL(int) TMR3NotifyResume(PVM pVM, PVMCPU pVCpu)
3278	{
3279	VMCPU_ASSERT_EMT(pVCpu);
3280	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED); /* Paranoia: Exploiting the virtual sync lock here. */
3281
3282	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
3283	/*
3284	* Set u64NsTsStartTotal. There is no need to back this out if either of
3285	* the two calls below fail.
3286	*/
3287	uint32_t uGen = ASMAtomicIncU32(&pVCpu->tm.s.uTimesGen); Assert(uGen & 1);
3288	pVCpu->tm.s.nsStartTotal = RTTimeNanoTS() - pVCpu->tm.s.nsStartTotal;
3289	pVCpu->tm.s.fSuspended = false;
3290	ASMAtomicWriteU32(&pVCpu->tm.s.uTimesGen, (uGen \| 1) + 1);
3291	#endif
3292
3293	/*
3294	* Resume the TSC first since it is normally linked to the virtual sync
3295	* clock, so it may actually not be resumed until we've executed the code
3296	* below.
3297	*/
3298	if (!pVM->tm.s.fTSCTiedToExecution)
3299	{
3300	int rc = tmCpuTickResumeLocked(pVM, pVCpu);
3301	AssertRCReturnStmt(rc, PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock), rc);
3302	}
3303
3304	/*
3305	* The shared virtual clock (includes virtual sync which is tied to it).
3306	*/
3307	int rc = tmVirtualResumeLocked(pVM);
3308
3309	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
3310	return rc;
3311	}
3312
3313
3314	/**
3315	* Sets the warp drive percent of the virtual time.
3316	*
3317	* @returns VBox status code.
3318	* @param pUVM The user mode VM structure.
3319	* @param u32Percent The new percentage. 100 means normal operation.
3320	*/
3321	VMMDECL(int) TMR3SetWarpDrive(PUVM pUVM, uint32_t u32Percent)
3322	{
3323	return VMR3ReqPriorityCallWaitU(pUVM, VMCPUID_ANY, (PFNRT)tmR3SetWarpDrive, 2, pUVM, u32Percent);
3324	}
3325
3326
3327	/**
3328	* EMT worker for TMR3SetWarpDrive.
3329	*
3330	* @returns VBox status code.
3331	* @param pUVM The user mode VM handle.
3332	* @param u32Percent See TMR3SetWarpDrive().
3333	* @internal
3334	*/
3335	static DECLCALLBACK(int) tmR3SetWarpDrive(PUVM pUVM, uint32_t u32Percent)
3336	{
3337	PVM pVM = pUVM->pVM;
3338	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
3339	PVMCPU pVCpu = VMMGetCpu(pVM);
3340
3341	/*
3342	* Validate it.
3343	*/
3344	AssertMsgReturn(u32Percent >= 2 && u32Percent <= 20000,
3345	("%RX32 is not between 2 and 20000 (inclusive).\n", u32Percent),
3346	VERR_INVALID_PARAMETER);
3347
3348	/** @todo This isn't a feature specific to virtual time, move the variables to
3349	* TM level and make it affect TMR3UTCNow as well! */
3350
3351	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED); /* Paranoia: Exploiting the virtual sync lock here. */
3352
3353	/*
3354	* If the time is running we'll have to pause it before we can change
3355	* the warp drive settings.
3356	*/
3357	bool fPaused = !!pVM->tm.s.cVirtualTicking;
3358	if (fPaused) /** @todo this isn't really working, but wtf. */
3359	TMR3NotifySuspend(pVM, pVCpu);
3360
3361	/** @todo Should switch TM mode to virt-tsc-emulated if it isn't already! */
3362	pVM->tm.s.u32VirtualWarpDrivePercentage = u32Percent;
3363	pVM->tm.s.fVirtualWarpDrive = u32Percent != 100;
3364	LogRel(("TM: u32VirtualWarpDrivePercentage=%RI32 fVirtualWarpDrive=%RTbool\n",
3365	pVM->tm.s.u32VirtualWarpDrivePercentage, pVM->tm.s.fVirtualWarpDrive));
3366
3367	if (fPaused)
3368	TMR3NotifyResume(pVM, pVCpu);
3369
3370	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
3371	return VINF_SUCCESS;
3372	}
3373
3374
3375	/**
3376	* Gets the current TMCLOCK_VIRTUAL time without checking
3377	* timers or anything.
3378	*
3379	* @returns The timestamp.
3380	* @param pUVM The user mode VM structure.
3381	*
3382	* @remarks See TMVirtualGetNoCheck.
3383	*/
3384	VMMR3DECL(uint64_t) TMR3TimeVirtGet(PUVM pUVM)
3385	{
3386	UVM_ASSERT_VALID_EXT_RETURN(pUVM, UINT64_MAX);
3387	PVM pVM = pUVM->pVM;
3388	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT64_MAX);
3389	return TMVirtualGetNoCheck(pVM);
3390	}
3391
3392
3393	/**
3394	* Gets the current TMCLOCK_VIRTUAL time in milliseconds without checking
3395	* timers or anything.
3396	*
3397	* @returns The timestamp in milliseconds.
3398	* @param pUVM The user mode VM structure.
3399	*
3400	* @remarks See TMVirtualGetNoCheck.
3401	*/
3402	VMMR3DECL(uint64_t) TMR3TimeVirtGetMilli(PUVM pUVM)
3403	{
3404	UVM_ASSERT_VALID_EXT_RETURN(pUVM, UINT64_MAX);
3405	PVM pVM = pUVM->pVM;
3406	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT64_MAX);
3407	return TMVirtualToMilli(pVM, TMVirtualGetNoCheck(pVM));
3408	}
3409
3410
3411	/**
3412	* Gets the current TMCLOCK_VIRTUAL time in microseconds without checking
3413	* timers or anything.
3414	*
3415	* @returns The timestamp in microseconds.
3416	* @param pUVM The user mode VM structure.
3417	*
3418	* @remarks See TMVirtualGetNoCheck.
3419	*/
3420	VMMR3DECL(uint64_t) TMR3TimeVirtGetMicro(PUVM pUVM)
3421	{
3422	UVM_ASSERT_VALID_EXT_RETURN(pUVM, UINT64_MAX);
3423	PVM pVM = pUVM->pVM;
3424	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT64_MAX);
3425	return TMVirtualToMicro(pVM, TMVirtualGetNoCheck(pVM));
3426	}
3427
3428
3429	/**
3430	* Gets the current TMCLOCK_VIRTUAL time in nanoseconds without checking
3431	* timers or anything.
3432	*
3433	* @returns The timestamp in nanoseconds.
3434	* @param pUVM The user mode VM structure.
3435	*
3436	* @remarks See TMVirtualGetNoCheck.
3437	*/
3438	VMMR3DECL(uint64_t) TMR3TimeVirtGetNano(PUVM pUVM)
3439	{
3440	UVM_ASSERT_VALID_EXT_RETURN(pUVM, UINT64_MAX);
3441	PVM pVM = pUVM->pVM;
3442	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT64_MAX);
3443	return TMVirtualToNano(pVM, TMVirtualGetNoCheck(pVM));
3444	}
3445
3446
3447	/**
3448	* Gets the current warp drive percent.
3449	*
3450	* @returns The warp drive percent.
3451	* @param pUVM The user mode VM structure.
3452	*/
3453	VMMR3DECL(uint32_t) TMR3GetWarpDrive(PUVM pUVM)
3454	{
3455	UVM_ASSERT_VALID_EXT_RETURN(pUVM, UINT32_MAX);
3456	PVM pVM = pUVM->pVM;
3457	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT32_MAX);
3458	return pVM->tm.s.u32VirtualWarpDrivePercentage;
3459	}
3460
3461
3462	#if 0 /* unused - needs a little updating after @bugref{9941}*/
3463	/**
3464	* Gets the performance information for one virtual CPU as seen by the VMM.
3465	*
3466	* The returned times covers the period where the VM is running and will be
3467	* reset when restoring a previous VM state (at least for the time being).
3468	*
3469	* @retval VINF_SUCCESS on success.
3470	* @retval VERR_NOT_IMPLEMENTED if not compiled in.
3471	* @retval VERR_INVALID_STATE if the VM handle is bad.
3472	* @retval VERR_INVALID_CPU_ID if idCpu is out of range.
3473	*
3474	* @param pVM The cross context VM structure.
3475	* @param idCpu The ID of the virtual CPU which times to get.
3476	* @param pcNsTotal Where to store the total run time (nano seconds) of
3477	* the CPU, i.e. the sum of the three other returns.
3478	* Optional.
3479	* @param pcNsExecuting Where to store the time (nano seconds) spent
3480	* executing guest code. Optional.
3481	* @param pcNsHalted Where to store the time (nano seconds) spent
3482	* halted. Optional
3483	* @param pcNsOther Where to store the time (nano seconds) spent
3484	* preempted by the host scheduler, on virtualization
3485	* overhead and on other tasks.
3486	*/
3487	VMMR3DECL(int) TMR3GetCpuLoadTimes(PVM pVM, VMCPUID idCpu, uint64_t pcNsTotal, uint64_t pcNsExecuting,
3488	uint64_t pcNsHalted, uint64_t pcNsOther)
3489	{
3490	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_STATE);
3491	AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_CPU_ID);
3492
3493	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
3494	/*
3495	* Get a stable result set.
3496	* This should be way quicker than an EMT request.
3497	*/
3498	PVMCPU pVCpu = pVM->apCpusR3[idCpu];
3499	uint32_t uTimesGen = ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen);
3500	uint64_t cNsTotal = pVCpu->tm.s.cNsTotal;
3501	uint64_t cNsExecuting = pVCpu->tm.s.cNsExecuting;
3502	uint64_t cNsHalted = pVCpu->tm.s.cNsHalted;
3503	uint64_t cNsOther = pVCpu->tm.s.cNsOther;
3504	while ( (uTimesGen & 1) /* update in progress */
3505	\|\| uTimesGen != ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen))
3506	{
3507	RTThreadYield();
3508	uTimesGen = ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen);
3509	cNsTotal = pVCpu->tm.s.cNsTotal;
3510	cNsExecuting = pVCpu->tm.s.cNsExecuting;
3511	cNsHalted = pVCpu->tm.s.cNsHalted;
3512	cNsOther = pVCpu->tm.s.cNsOther;
3513	}
3514
3515	/*
3516	* Fill in the return values.
3517	*/
3518	if (pcNsTotal)
3519	*pcNsTotal = cNsTotal;
3520	if (pcNsExecuting)
3521	*pcNsExecuting = cNsExecuting;
3522	if (pcNsHalted)
3523	*pcNsHalted = cNsHalted;
3524	if (pcNsOther)
3525	*pcNsOther = cNsOther;
3526
3527	return VINF_SUCCESS;
3528
3529	#else
3530	return VERR_NOT_IMPLEMENTED;
3531	#endif
3532	}
3533	#endif /* unused */
3534
3535
3536	/**
3537	* Gets the performance information for one virtual CPU as seen by the VMM in
3538	* percents.
3539	*
3540	* The returned times covers the period where the VM is running and will be
3541	* reset when restoring a previous VM state (at least for the time being).
3542	*
3543	* @retval VINF_SUCCESS on success.
3544	* @retval VERR_NOT_IMPLEMENTED if not compiled in.
3545	* @retval VERR_INVALID_VM_HANDLE if the VM handle is bad.
3546	* @retval VERR_INVALID_CPU_ID if idCpu is out of range.
3547	*
3548	* @param pUVM The usermode VM structure.
3549	* @param idCpu The ID of the virtual CPU which times to get.
3550	* @param pcMsInterval Where to store the interval of the percentages in
3551	* milliseconds. Optional.
3552	* @param pcPctExecuting Where to return the percentage of time spent
3553	* executing guest code. Optional.
3554	* @param pcPctHalted Where to return the percentage of time spent halted.
3555	* Optional
3556	* @param pcPctOther Where to return the percentage of time spent
3557	* preempted by the host scheduler, on virtualization
3558	* overhead and on other tasks.
3559	*/
3560	VMMR3DECL(int) TMR3GetCpuLoadPercents(PUVM pUVM, VMCPUID idCpu, uint64_t pcMsInterval, uint8_t pcPctExecuting,
3561	uint8_t pcPctHalted, uint8_t pcPctOther)
3562	{
3563	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
3564	PVM pVM = pUVM->pVM;
3565	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
3566	AssertReturn(idCpu == VMCPUID_ALL \|\| idCpu < pVM->cCpus, VERR_INVALID_CPU_ID);
3567
3568	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
3569	TMCPULOADSTATE volatile *pState;
3570	if (idCpu == VMCPUID_ALL)
3571	pState = &pVM->tm.s.CpuLoad;
3572	else
3573	pState = &pVM->apCpusR3[idCpu]->tm.s.CpuLoad;
3574
3575	if (pcMsInterval)
3576	*pcMsInterval = RT_MS_1SEC;
3577	if (pcPctExecuting)
3578	*pcPctExecuting = pState->cPctExecuting;
3579	if (pcPctHalted)
3580	*pcPctHalted = pState->cPctHalted;
3581	if (pcPctOther)
3582	*pcPctOther = pState->cPctOther;
3583
3584	return VINF_SUCCESS;
3585
3586	#else
3587	RT_NOREF(pcMsInterval, pcPctExecuting, pcPctHalted, pcPctOther);
3588	return VERR_NOT_IMPLEMENTED;
3589	#endif
3590	}
3591
3592	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
3593
3594	/**
3595	* Helper for tmR3CpuLoadTimer.
3596	*
3597	* @param pState The state to update.
3598	* @param cNsTotal Total time.
3599	* @param cNsExecuting Time executing.
3600	* @param cNsHalted Time halted.
3601	*/
3602	DECLINLINE(void) tmR3CpuLoadTimerMakeUpdate(PTMCPULOADSTATE pState, uint64_t cNsTotal, uint64_t cNsExecuting, uint64_t cNsHalted)
3603	{
3604	/* Calc & update deltas */
3605	uint64_t cNsTotalDelta = cNsTotal - pState->cNsPrevTotal;
3606	uint64_t cNsExecutingDelta = cNsExecuting - pState->cNsPrevExecuting;
3607	uint64_t cNsHaltedDelta = cNsHalted - pState->cNsPrevHalted;
3608
3609	if (cNsExecutingDelta + cNsHaltedDelta <= cNsTotalDelta)
3610	{ /* likely */ }
3611	else
3612	{
3613	/* Just adjust the executing and halted values down to match the total delta. */
3614	uint64_t const cNsExecAndHalted = cNsExecutingDelta + cNsHaltedDelta;
3615	uint64_t const cNsAdjust = cNsExecAndHalted - cNsTotalDelta + cNsTotalDelta / 64;
3616	cNsExecutingDelta -= (cNsAdjust * cNsExecutingDelta + cNsExecAndHalted - 1) / cNsExecAndHalted;
3617	cNsHaltedDelta -= (cNsAdjust * cNsHaltedDelta + cNsExecAndHalted - 1) / cNsExecAndHalted;
3618	/Assert(cNsExecutingDelta + cNsHaltedDelta <= cNsTotalDelta); - annoying when debugging /
3619	}
3620
3621	pState->cNsPrevExecuting = cNsExecuting;
3622	pState->cNsPrevHalted = cNsHalted;
3623	pState->cNsPrevTotal = cNsTotal;
3624
3625	/* Calc pcts. */
3626	uint8_t cPctExecuting, cPctHalted, cPctOther;
3627	if (!cNsTotalDelta)
3628	{
3629	cPctExecuting = 0;
3630	cPctHalted = 100;
3631	cPctOther = 0;
3632	}
3633	else if (cNsTotalDelta < UINT64_MAX / 4)
3634	{
3635	cPctExecuting = (uint8_t)(cNsExecutingDelta * 100 / cNsTotalDelta);
3636	cPctHalted = (uint8_t)(cNsHaltedDelta * 100 / cNsTotalDelta);
3637	cPctOther = (uint8_t)((cNsTotalDelta - cNsExecutingDelta - cNsHaltedDelta) * 100 / cNsTotalDelta);
3638	}
3639	else
3640	{
3641	cPctExecuting = 0;
3642	cPctHalted = 100;
3643	cPctOther = 0;
3644	}
3645
3646	/* Update percentages: */
3647	size_t idxHistory = pState->idxHistory + 1;
3648	if (idxHistory >= RT_ELEMENTS(pState->aHistory))
3649	idxHistory = 0;
3650
3651	pState->cPctExecuting = cPctExecuting;
3652	pState->cPctHalted = cPctHalted;
3653	pState->cPctOther = cPctOther;
3654
3655	pState->aHistory[idxHistory].cPctExecuting = cPctExecuting;
3656	pState->aHistory[idxHistory].cPctHalted = cPctHalted;
3657	pState->aHistory[idxHistory].cPctOther = cPctOther;
3658
3659	pState->idxHistory = (uint16_t)idxHistory;
3660	if (pState->cHistoryEntries < RT_ELEMENTS(pState->aHistory))
3661	pState->cHistoryEntries++;
3662	}
3663
3664
3665	/**
3666	* @callback_method_impl{FNTMTIMERINT,
3667	* Timer callback that calculates the CPU load since the last
3668	* time it was called.}
3669	*/
3670	static DECLCALLBACK(void) tmR3CpuLoadTimer(PVM pVM, TMTIMERHANDLE hTimer, void *pvUser)
3671	{
3672	/*
3673	* Re-arm the timer first.
3674	*/
3675	int rc = TMTimerSetMillies(pVM, hTimer, 1000);
3676	AssertLogRelRC(rc);
3677	NOREF(pvUser);
3678
3679	/*
3680	* Update the values for each CPU.
3681	*/
3682	uint64_t cNsTotalAll = 0;
3683	uint64_t cNsExecutingAll = 0;
3684	uint64_t cNsHaltedAll = 0;
3685	for (VMCPUID iCpu = 0; iCpu < pVM->cCpus; iCpu++)
3686	{
3687	PVMCPU pVCpu = pVM->apCpusR3[iCpu];
3688
3689	/* Try get a stable data set. */
3690	uint32_t cTries = 3;
3691	uint64_t nsNow = RTTimeNanoTS();
3692	uint32_t uTimesGen = ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen);
3693	bool fSuspended = pVCpu->tm.s.fSuspended;
3694	uint64_t nsStartTotal = pVCpu->tm.s.nsStartTotal;
3695	uint64_t cNsExecuting = pVCpu->tm.s.cNsExecuting;
3696	uint64_t cNsHalted = pVCpu->tm.s.cNsHalted;
3697	while (RT_UNLIKELY( (uTimesGen & 1) /* update in progress */
3698	\|\| uTimesGen != ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen)))
3699	{
3700	if (!--cTries)
3701	break;
3702	ASMNopPause();
3703	nsNow = RTTimeNanoTS();
3704	uTimesGen = ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen);
3705	fSuspended = pVCpu->tm.s.fSuspended;
3706	nsStartTotal = pVCpu->tm.s.nsStartTotal;
3707	cNsExecuting = pVCpu->tm.s.cNsExecuting;
3708	cNsHalted = pVCpu->tm.s.cNsHalted;
3709	}
3710
3711	/* Totals */
3712	uint64_t cNsTotal = fSuspended ? nsStartTotal : nsNow - nsStartTotal;
3713	cNsTotalAll += cNsTotal;
3714	cNsExecutingAll += cNsExecuting;
3715	cNsHaltedAll += cNsHalted;
3716
3717	/* Calc the PCTs and update the state. */
3718	tmR3CpuLoadTimerMakeUpdate(&pVCpu->tm.s.CpuLoad, cNsTotal, cNsExecuting, cNsHalted);
3719
3720	/* Tell the VCpu to update the other and total stat members. */
3721	ASMAtomicWriteBool(&pVCpu->tm.s.fUpdateStats, true);
3722	}
3723
3724	/*
3725	* Update the value for all the CPUs.
3726	*/
3727	tmR3CpuLoadTimerMakeUpdate(&pVM->tm.s.CpuLoad, cNsTotalAll, cNsExecutingAll, cNsHaltedAll);
3728
3729	}
3730
3731	#endif /* !VBOX_WITHOUT_NS_ACCOUNTING */
3732
3733
3734	/**
3735	* @callback_method_impl{PFNVMMEMTRENDEZVOUS,
3736	* Worker for TMR3CpuTickParavirtEnable}
3737	*/
3738	static DECLCALLBACK(VBOXSTRICTRC) tmR3CpuTickParavirtEnable(PVM pVM, PVMCPU pVCpuEmt, void *pvData)
3739	{
3740	AssertPtr(pVM); Assert(pVM->tm.s.fTSCModeSwitchAllowed); NOREF(pVCpuEmt); NOREF(pvData);
3741	Assert(pVM->tm.s.enmTSCMode != TMTSCMODE_NATIVE_API); /** @todo figure out NEM/win and paravirt */
3742	Assert(tmR3HasFixedTSC(pVM));
3743
3744	if (pVM->tm.s.enmTSCMode != TMTSCMODE_REAL_TSC_OFFSET)
3745	{
3746	/*
3747	* The return value of TMCpuTickGet() and the guest's TSC value for each
3748	* CPU must remain constant across the TM TSC mode-switch. Thus we have
3749	* the following equation (new/old signifies the new/old tsc modes):
3750	* uNewTsc = uOldTsc
3751	*
3752	* Where (see tmCpuTickGetInternal):
3753	* uOldTsc = uRawOldTsc - offTscRawSrcOld
3754	* uNewTsc = uRawNewTsc - offTscRawSrcNew
3755	*
3756	* Solve it for offTscRawSrcNew without replacing uOldTsc:
3757	* uRawNewTsc - offTscRawSrcNew = uOldTsc
3758	* => -offTscRawSrcNew = uOldTsc - uRawNewTsc
3759	* => offTscRawSrcNew = uRawNewTsc - uOldTsc
3760	*/
3761	uint64_t uRawOldTsc = tmR3CpuTickGetRawVirtualNoCheck(pVM);
3762	uint64_t uRawNewTsc = SUPReadTsc() * pVM->tm.s.u8TSCMultiplier;
3763	uint32_t cCpus = pVM->cCpus;
3764	for (uint32_t i = 0; i < cCpus; i++)
3765	{
3766	PVMCPU pVCpu = pVM->apCpusR3[i];
3767	uint64_t uOldTsc = uRawOldTsc - pVCpu->tm.s.offTSCRawSrc;
3768	pVCpu->tm.s.offTSCRawSrc = uRawNewTsc - uOldTsc;
3769	Assert(uRawNewTsc - pVCpu->tm.s.offTSCRawSrc >= uOldTsc); /* paranoia^256 */
3770	}
3771
3772	LogRel(("TM: Switching TSC mode from '%s' to '%s'\n", tmR3GetTSCModeNameEx(pVM->tm.s.enmTSCMode),
3773	tmR3GetTSCModeNameEx(TMTSCMODE_REAL_TSC_OFFSET)));
3774	pVM->tm.s.enmTSCMode = TMTSCMODE_REAL_TSC_OFFSET;
3775	}
3776	return VINF_SUCCESS;
3777	}
3778
3779
3780	/**
3781	* Notify TM that the guest has enabled usage of a paravirtualized TSC.
3782	*
3783	* This may perform a EMT rendezvous and change the TSC virtualization mode.
3784	*
3785	* @returns VBox status code.
3786	* @param pVM The cross context VM structure.
3787	*/
3788	VMMR3_INT_DECL(int) TMR3CpuTickParavirtEnable(PVM pVM)
3789	{
3790	int rc = VINF_SUCCESS;
3791	if (pVM->tm.s.fTSCModeSwitchAllowed)
3792	rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, tmR3CpuTickParavirtEnable, NULL);
3793	else
3794	LogRel(("TM: Host/VM is not suitable for using TSC mode '%s', request to change TSC mode ignored\n",
3795	tmR3GetTSCModeNameEx(TMTSCMODE_REAL_TSC_OFFSET)));
3796	pVM->tm.s.fParavirtTscEnabled = true;
3797	return rc;
3798	}
3799
3800
3801	/**
3802	* @callback_method_impl{PFNVMMEMTRENDEZVOUS,
3803	* Worker for TMR3CpuTickParavirtDisable}
3804	*/
3805	static DECLCALLBACK(VBOXSTRICTRC) tmR3CpuTickParavirtDisable(PVM pVM, PVMCPU pVCpuEmt, void *pvData)
3806	{
3807	AssertPtr(pVM); Assert(pVM->tm.s.fTSCModeSwitchAllowed); NOREF(pVCpuEmt);
3808	RT_NOREF1(pvData);
3809
3810	if ( pVM->tm.s.enmTSCMode == TMTSCMODE_REAL_TSC_OFFSET
3811	&& pVM->tm.s.enmTSCMode != pVM->tm.s.enmOriginalTSCMode)
3812	{
3813	/*
3814	* See tmR3CpuTickParavirtEnable for an explanation of the conversion math.
3815	*/
3816	uint64_t uRawOldTsc = SUPReadTsc() * pVM->tm.s.u8TSCMultiplier;
3817	uint64_t uRawNewTsc = tmR3CpuTickGetRawVirtualNoCheck(pVM);
3818	uint32_t cCpus = pVM->cCpus;
3819	for (uint32_t i = 0; i < cCpus; i++)
3820	{
3821	PVMCPU pVCpu = pVM->apCpusR3[i];
3822	uint64_t uOldTsc = uRawOldTsc - pVCpu->tm.s.offTSCRawSrc;
3823	pVCpu->tm.s.offTSCRawSrc = uRawNewTsc - uOldTsc;
3824	Assert(uRawNewTsc - pVCpu->tm.s.offTSCRawSrc >= uOldTsc); /* paranoia^256 */
3825
3826	/* Update the last-seen tick here as we havent't been updating it (as we don't
3827	need it) while in pure TSC-offsetting mode. */
3828	pVCpu->tm.s.u64TSCLastSeen = uOldTsc;
3829	}
3830
3831	LogRel(("TM: Switching TSC mode from '%s' to '%s'\n", tmR3GetTSCModeNameEx(pVM->tm.s.enmTSCMode),
3832	tmR3GetTSCModeNameEx(pVM->tm.s.enmOriginalTSCMode)));
3833	pVM->tm.s.enmTSCMode = pVM->tm.s.enmOriginalTSCMode;
3834	}
3835	return VINF_SUCCESS;
3836	}
3837
3838
3839	/**
3840	* Notify TM that the guest has disabled usage of a paravirtualized TSC.
3841	*
3842	* If TMR3CpuTickParavirtEnable() changed the TSC virtualization mode, this will
3843	* perform an EMT rendezvous to revert those changes.
3844	*
3845	* @returns VBox status code.
3846	* @param pVM The cross context VM structure.
3847	*/
3848	VMMR3_INT_DECL(int) TMR3CpuTickParavirtDisable(PVM pVM)
3849	{
3850	int rc = VINF_SUCCESS;
3851	if (pVM->tm.s.fTSCModeSwitchAllowed)
3852	rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, tmR3CpuTickParavirtDisable, NULL);
3853	pVM->tm.s.fParavirtTscEnabled = false;
3854	return rc;
3855	}
3856
3857
3858	/**
3859	* Check whether the guest can be presented a fixed rate & monotonic TSC.
3860	*
3861	* @returns true if TSC is stable, false otherwise.
3862	* @param pVM The cross context VM structure.
3863	* @param fWithParavirtEnabled Whether it's fixed & monotonic when
3864	* paravirt. TSC is enabled or not.
3865	*
3866	* @remarks Must be called only after TMR3InitFinalize().
3867	*/
3868	VMMR3_INT_DECL(bool) TMR3CpuTickIsFixedRateMonotonic(PVM pVM, bool fWithParavirtEnabled)
3869	{
3870	/** @todo figure out what exactly we want here later. */
3871	NOREF(fWithParavirtEnabled);
3872	PSUPGLOBALINFOPAGE pGip;
3873	return tmR3HasFixedTSC(pVM) /* Host has fixed-rate TSC. */
3874	&& ( (pGip = g_pSUPGlobalInfoPage) == NULL /* Can be NULL in driverless mode. */
3875	\|\| (pGip->u32Mode != SUPGIPMODE_ASYNC_TSC)); /* GIP thinks it's monotonic. */
3876	}
3877
3878
3879	/**
3880	* Gets the 5 char clock name for the info tables.
3881	*
3882	* @returns The name.
3883	* @param enmClock The clock.
3884	*/
3885	DECLINLINE(const char *) tmR3Get5CharClockName(TMCLOCK enmClock)
3886	{
3887	switch (enmClock)
3888	{
3889	case TMCLOCK_REAL: return "Real ";
3890	case TMCLOCK_VIRTUAL: return "Virt ";
3891	case TMCLOCK_VIRTUAL_SYNC: return "VrSy ";
3892	case TMCLOCK_TSC: return "TSC ";
3893	default: return "Bad ";
3894	}
3895	}
3896
3897
3898	/**
3899	* Display all timers.
3900	*
3901	* @param pVM The cross context VM structure.
3902	* @param pHlp The info helpers.
3903	* @param pszArgs Arguments, ignored.
3904	*/
3905	static DECLCALLBACK(void) tmR3TimerInfo(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
3906	{
3907	NOREF(pszArgs);
3908	pHlp->pfnPrintf(pHlp,
3909	"Timers (pVM=%p)\n"
3910	"%.s %.s %.s %.s Clock %18s %18s %6s %-25s Description\n",
3911	pVM,
3912	sizeof(RTR3PTR) * 2, "pTimerR3 ",
3913	sizeof(int32_t) * 2, "offNext ",
3914	sizeof(int32_t) * 2, "offPrev ",
3915	sizeof(int32_t) * 2, "offSched ",
3916	"Time",
3917	"Expire",
3918	"HzHint",
3919	"State");
3920	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
3921	{
3922	PTMTIMERQUEUE const pQueue = &pVM->tm.s.aTimerQueues[idxQueue];
3923	const char * const pszClock = tmR3Get5CharClockName(pQueue->enmClock);
3924	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
3925	for (uint32_t idxTimer = 0; idxTimer < pQueue->cTimersAlloc; idxTimer++)
3926	{
3927	PTMTIMER pTimer = &pQueue->paTimers[idxTimer];
3928	TMTIMERSTATE enmState = pTimer->enmState;
3929	if (enmState < TMTIMERSTATE_DESTROY && enmState > TMTIMERSTATE_INVALID)
3930	pHlp->pfnPrintf(pHlp,
3931	"%p %08RX32 %08RX32 %08RX32 %s %18RU64 %18RU64 %6RU32 %-25s %s\n",
3932	pTimer,
3933	pTimer->idxNext,
3934	pTimer->idxPrev,
3935	pTimer->idxScheduleNext,
3936	pszClock,
3937	TMTimerGet(pVM, pTimer->hSelf),
3938	pTimer->u64Expire,
3939	pTimer->uHzHint,
3940	tmTimerState(enmState),
3941	pTimer->szName);
3942	}
3943	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
3944	}
3945	}
3946
3947
3948	/**
3949	* Display all active timers.
3950	*
3951	* @param pVM The cross context VM structure.
3952	* @param pHlp The info helpers.
3953	* @param pszArgs Arguments, ignored.
3954	*/
3955	static DECLCALLBACK(void) tmR3TimerInfoActive(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
3956	{
3957	NOREF(pszArgs);
3958	pHlp->pfnPrintf(pHlp,
3959	"Active Timers (pVM=%p)\n"
3960	"%.s %.s %.s %.s Clock %18s %18s %6s %-25s Description\n",
3961	pVM,
3962	sizeof(RTR3PTR) * 2, "pTimerR3 ",
3963	sizeof(int32_t) * 2, "offNext ",
3964	sizeof(int32_t) * 2, "offPrev ",
3965	sizeof(int32_t) * 2, "offSched ",
3966	"Time",
3967	"Expire",
3968	"HzHint",
3969	"State");
3970	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
3971	{
3972	PTMTIMERQUEUE const pQueue = &pVM->tm.s.aTimerQueues[idxQueue];
3973	const char * const pszClock = tmR3Get5CharClockName(pQueue->enmClock);
3974	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
3975	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
3976
3977	for (PTMTIMERR3 pTimer = tmTimerQueueGetHead(pQueue, pQueue);
3978	pTimer;
3979	pTimer = tmTimerGetNext(pQueue, pTimer))
3980	{
3981	pHlp->pfnPrintf(pHlp,
3982	"%p %08RX32 %08RX32 %08RX32 %s %18RU64 %18RU64 %6RU32 %-25s %s\n",
3983	pTimer,
3984	pTimer->idxNext,
3985	pTimer->idxPrev,
3986	pTimer->idxScheduleNext,
3987	pszClock,
3988	TMTimerGet(pVM, pTimer->hSelf),
3989	pTimer->u64Expire,
3990	pTimer->uHzHint,
3991	tmTimerState(pTimer->enmState),
3992	pTimer->szName);
3993	}
3994
3995	PDMCritSectLeave(pVM, &pQueue->TimerLock);
3996	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
3997	}
3998	}
3999
4000
4001	/**
4002	* Display all clocks.
4003	*
4004	* @param pVM The cross context VM structure.
4005	* @param pHlp The info helpers.
4006	* @param pszArgs Arguments, ignored.
4007	*/
4008	static DECLCALLBACK(void) tmR3InfoClocks(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
4009	{
4010	NOREF(pszArgs);
4011
4012	/*
4013	* Read the times first to avoid more than necessary time variation.
4014	*/
4015	const uint64_t u64Virtual = TMVirtualGet(pVM);
4016	const uint64_t u64VirtualSync = TMVirtualSyncGet(pVM);
4017	const uint64_t u64Real = TMRealGet(pVM);
4018
4019	for (VMCPUID i = 0; i < pVM->cCpus; i++)
4020	{
4021	PVMCPU pVCpu = pVM->apCpusR3[i];
4022	uint64_t u64TSC = TMCpuTickGet(pVCpu);
4023
4024	/*
4025	* TSC
4026	*/
4027	pHlp->pfnPrintf(pHlp,
4028	"Cpu Tick: %18RU64 (%#016RX64) %RU64Hz %s - virtualized",
4029	u64TSC, u64TSC, TMCpuTicksPerSecond(pVM),
4030	pVCpu->tm.s.fTSCTicking ? "ticking" : "paused");
4031	if (pVM->tm.s.enmTSCMode == TMTSCMODE_REAL_TSC_OFFSET)
4032	{
4033	pHlp->pfnPrintf(pHlp, " - real tsc offset");
4034	if (pVCpu->tm.s.offTSCRawSrc)
4035	pHlp->pfnPrintf(pHlp, "\n offset %RU64", pVCpu->tm.s.offTSCRawSrc);
4036	}
4037	else if (pVM->tm.s.enmTSCMode == TMTSCMODE_NATIVE_API)
4038	pHlp->pfnPrintf(pHlp, " - native api");
4039	else
4040	pHlp->pfnPrintf(pHlp, " - virtual clock");
4041	pHlp->pfnPrintf(pHlp, "\n");
4042	}
4043
4044	/*
4045	* virtual
4046	*/
4047	pHlp->pfnPrintf(pHlp,
4048	" Virtual: %18RU64 (%#016RX64) %RU64Hz %s",
4049	u64Virtual, u64Virtual, TMVirtualGetFreq(pVM),
4050	pVM->tm.s.cVirtualTicking ? "ticking" : "paused");
4051	if (pVM->tm.s.fVirtualWarpDrive)
4052	pHlp->pfnPrintf(pHlp, " WarpDrive %RU32 %%", pVM->tm.s.u32VirtualWarpDrivePercentage);
4053	pHlp->pfnPrintf(pHlp, "\n");
4054
4055	/*
4056	* virtual sync
4057	*/
4058	pHlp->pfnPrintf(pHlp,
4059	"VirtSync: %18RU64 (%#016RX64) %s%s",
4060	u64VirtualSync, u64VirtualSync,
4061	pVM->tm.s.fVirtualSyncTicking ? "ticking" : "paused",
4062	pVM->tm.s.fVirtualSyncCatchUp ? " - catchup" : "");
4063	if (pVM->tm.s.offVirtualSync)
4064	{
4065	pHlp->pfnPrintf(pHlp, "\n offset %RU64", pVM->tm.s.offVirtualSync);
4066	if (pVM->tm.s.u32VirtualSyncCatchUpPercentage)
4067	pHlp->pfnPrintf(pHlp, " catch-up rate %u %%", pVM->tm.s.u32VirtualSyncCatchUpPercentage);
4068	}
4069	pHlp->pfnPrintf(pHlp, "\n");
4070
4071	/*
4072	* real
4073	*/
4074	pHlp->pfnPrintf(pHlp,
4075	" Real: %18RU64 (%#016RX64) %RU64Hz\n",
4076	u64Real, u64Real, TMRealGetFreq(pVM));
4077	}
4078
4079
4080	/**
4081	* Helper for tmR3InfoCpuLoad that adjust @a uPct to the given graph width.
4082	*/
4083	DECLINLINE(size_t) tmR3InfoCpuLoadAdjustWidth(size_t uPct, size_t cchWidth)
4084	{
4085	if (cchWidth != 100)
4086	uPct = (size_t)(((double)uPct + 0.5) * ((double)cchWidth / 100.0));
4087	return uPct;
4088	}
4089
4090
4091	/**
4092	* @callback_method_impl{FNDBGFINFOARGVINT}
4093	*/
4094	static DECLCALLBACK(void) tmR3InfoCpuLoad(PVM pVM, PCDBGFINFOHLP pHlp, int cArgs, char **papszArgs)
4095	{
4096	char szTmp[1024];
4097
4098	/*
4099	* Parse arguments.
4100	*/
4101	PTMCPULOADSTATE pState = &pVM->tm.s.CpuLoad;
4102	VMCPUID idCpu = 0;
4103	bool fAllCpus = true;
4104	bool fExpGraph = true;
4105	uint32_t cchWidth = 80;
4106	uint32_t cPeriods = RT_ELEMENTS(pState->aHistory);
4107	uint32_t cRows = 60;
4108
4109	static const RTGETOPTDEF s_aOptions[] =
4110	{
4111	{ "all", 'a', RTGETOPT_REQ_NOTHING },
4112	{ "cpu", 'c', RTGETOPT_REQ_UINT32 },
4113	{ "periods", 'p', RTGETOPT_REQ_UINT32 },
4114	{ "rows", 'r', RTGETOPT_REQ_UINT32 },
4115	{ "uni", 'u', RTGETOPT_REQ_NOTHING },
4116	{ "uniform", 'u', RTGETOPT_REQ_NOTHING },
4117	{ "width", 'w', RTGETOPT_REQ_UINT32 },
4118	{ "exp", 'x', RTGETOPT_REQ_NOTHING },
4119	{ "exponential", 'x', RTGETOPT_REQ_NOTHING },
4120	};
4121
4122	RTGETOPTSTATE State;
4123	int rc = RTGetOptInit(&State, cArgs, papszArgs, s_aOptions, RT_ELEMENTS(s_aOptions), 0, 0 /fFlags/);
4124	AssertRC(rc);
4125
4126	RTGETOPTUNION ValueUnion;
4127	while ((rc = RTGetOpt(&State, &ValueUnion)) != 0)
4128	{
4129	switch (rc)
4130	{
4131	case 'a':
4132	pState = &pVM->apCpusR3[0]->tm.s.CpuLoad;
4133	idCpu = 0;
4134	fAllCpus = true;
4135	break;
4136	case 'c':
4137	if (ValueUnion.u32 < pVM->cCpus)
4138	{
4139	pState = &pVM->apCpusR3[ValueUnion.u32]->tm.s.CpuLoad;
4140	idCpu = ValueUnion.u32;
4141	}
4142	else
4143	{
4144	pState = &pVM->tm.s.CpuLoad;
4145	idCpu = VMCPUID_ALL;
4146	}
4147	fAllCpus = false;
4148	break;
4149	case 'p':
4150	cPeriods = RT_MIN(RT_MAX(ValueUnion.u32, 1), RT_ELEMENTS(pState->aHistory));
4151	break;
4152	case 'r':
4153	cRows = RT_MIN(RT_MAX(ValueUnion.u32, 5), RT_ELEMENTS(pState->aHistory));
4154	break;
4155	case 'w':
4156	cchWidth = RT_MIN(RT_MAX(ValueUnion.u32, 10), sizeof(szTmp) - 32);
4157	break;
4158	case 'x':
4159	fExpGraph = true;
4160	break;
4161	case 'u':
4162	fExpGraph = false;
4163	break;
4164	case 'h':
4165	pHlp->pfnPrintf(pHlp,
4166	"Usage: cpuload [parameters]\n"
4167	" all, -a\n"
4168	" Show statistics for all CPUs. (default)\n"
4169	" cpu=id, -c id\n"
4170	" Show statistics for the specified CPU ID. Show combined stats if out of range.\n"
4171	" periods=count, -p count\n"
4172	" Number of periods to show. Default: all\n"
4173	" rows=count, -r count\n"
4174	" Number of rows in the graphs. Default: 60\n"
4175	" width=count, -w count\n"
4176	" Core graph width in characters. Default: 80\n"
4177	" exp, exponential, -e\n"
4178	" Do 1:1 for more recent half / 30 seconds of the graph, combine the\n"
4179	" rest into increasinly larger chunks. Default.\n"
4180	" uniform, uni, -u\n"
4181	" Combine periods into rows in a uniform manner for the whole graph.\n");
4182	return;
4183	default:
4184	pHlp->pfnGetOptError(pHlp, rc, &ValueUnion, &State);
4185	return;
4186	}
4187	}
4188
4189	/*
4190	* Do the job.
4191	*/
4192	for (;;)
4193	{
4194	uint32_t const cMaxPeriods = pState->cHistoryEntries;
4195	if (cPeriods > cMaxPeriods)
4196	cPeriods = cMaxPeriods;
4197	if (cPeriods > 0)
4198	{
4199	if (fAllCpus)
4200	{
4201	if (idCpu > 0)
4202	pHlp->pfnPrintf(pHlp, "\n");
4203	pHlp->pfnPrintf(pHlp, " CPU load for virtual CPU %#04x\n"
4204	" -------------------------------\n", idCpu);
4205	}
4206
4207	/*
4208	* Figure number of periods per chunk. We can either do this in a linear
4209	* fashion or a exponential fashion that compresses old history more.
4210	*/
4211	size_t cPerRowDecrement = 0;
4212	size_t cPeriodsPerRow = 1;
4213	if (cRows < cPeriods)
4214	{
4215	if (!fExpGraph)
4216	cPeriodsPerRow = (cPeriods + cRows / 2) / cRows;
4217	else
4218	{
4219	/* The last 30 seconds or half of the rows are 1:1, the other part
4220	is in increasing period counts. Code is a little simple but seems
4221	to do the job most of the time, which is all I have time now. */
4222	size_t cPeriodsOneToOne = RT_MIN(30, cRows / 2);
4223	size_t cRestRows = cRows - cPeriodsOneToOne;
4224	size_t cRestPeriods = cPeriods - cPeriodsOneToOne;
4225
4226	size_t cPeriodsInWindow = 0;
4227	for (cPeriodsPerRow = 0; cPeriodsPerRow <= cRestRows && cPeriodsInWindow < cRestPeriods; cPeriodsPerRow++)
4228	cPeriodsInWindow += cPeriodsPerRow + 1;
4229
4230	size_t iLower = 1;
4231	while (cPeriodsInWindow < cRestPeriods)
4232	{
4233	cPeriodsPerRow++;
4234	cPeriodsInWindow += cPeriodsPerRow;
4235	cPeriodsInWindow -= iLower;
4236	iLower++;
4237	}
4238
4239	cPerRowDecrement = 1;
4240	}
4241	}
4242
4243	/*
4244	* Do the work.
4245	*/
4246	size_t cPctExecuting = 0;
4247	size_t cPctOther = 0;
4248	size_t cPeriodsAccumulated = 0;
4249
4250	size_t cRowsLeft = cRows;
4251	size_t iHistory = (pState->idxHistory - cPeriods) % RT_ELEMENTS(pState->aHistory);
4252	while (cPeriods-- > 0)
4253	{
4254	iHistory++;
4255	if (iHistory >= RT_ELEMENTS(pState->aHistory))
4256	iHistory = 0;
4257
4258	cPctExecuting += pState->aHistory[iHistory].cPctExecuting;
4259	cPctOther += pState->aHistory[iHistory].cPctOther;
4260	cPeriodsAccumulated += 1;
4261	if ( cPeriodsAccumulated >= cPeriodsPerRow
4262	\|\| cPeriods < cRowsLeft)
4263	{
4264	/*
4265	* Format and output the line.
4266	*/
4267	size_t offTmp = 0;
4268	size_t i = tmR3InfoCpuLoadAdjustWidth(cPctExecuting / cPeriodsAccumulated, cchWidth);
4269	while (i-- > 0)
4270	szTmp[offTmp++] = '#';
4271	i = tmR3InfoCpuLoadAdjustWidth(cPctOther / cPeriodsAccumulated, cchWidth);
4272	while (i-- > 0)
4273	szTmp[offTmp++] = 'O';
4274	szTmp[offTmp] = '\0';
4275
4276	cRowsLeft--;
4277	pHlp->pfnPrintf(pHlp, "%3zus: %s\n", cPeriods + cPeriodsAccumulated / 2, szTmp);
4278
4279	/* Reset the state: */
4280	cPctExecuting = 0;
4281	cPctOther = 0;
4282	cPeriodsAccumulated = 0;
4283	if (cPeriodsPerRow > cPerRowDecrement)
4284	cPeriodsPerRow -= cPerRowDecrement;
4285	}
4286	}
4287	pHlp->pfnPrintf(pHlp, " (#=guest, O=VMM overhead) idCpu=%#x\n", idCpu);
4288
4289	}
4290	else
4291	pHlp->pfnPrintf(pHlp, "No load data.\n");
4292
4293	/*
4294	* Next CPU if we're display all.
4295	*/
4296	if (!fAllCpus)
4297	break;
4298	idCpu++;
4299	if (idCpu >= pVM->cCpus)
4300	break;
4301	pState = &pVM->apCpusR3[idCpu]->tm.s.CpuLoad;
4302	}
4303
4304	}
4305
4306
4307	/**
4308	* Gets the descriptive TM TSC mode name given the enum value.
4309	*
4310	* @returns The name.
4311	* @param enmMode The mode to name.
4312	*/
4313	static const char *tmR3GetTSCModeNameEx(TMTSCMODE enmMode)
4314	{
4315	switch (enmMode)
4316	{
4317	case TMTSCMODE_REAL_TSC_OFFSET: return "RealTSCOffset";
4318	case TMTSCMODE_VIRT_TSC_EMULATED: return "VirtTSCEmulated";
4319	case TMTSCMODE_DYNAMIC: return "Dynamic";
4320	case TMTSCMODE_NATIVE_API: return "NativeApi";
4321	default: return "???";
4322	}
4323	}
4324
4325
4326	/**
4327	* Gets the descriptive TM TSC mode name.
4328	*
4329	* @returns The name.
4330	* @param pVM The cross context VM structure.
4331	*/
4332	static const char *tmR3GetTSCModeName(PVM pVM)
4333	{
4334	Assert(pVM);
4335	return tmR3GetTSCModeNameEx(pVM->tm.s.enmTSCMode);
4336	}
4337

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source: vbox/trunk/src/VBox/VMM/VMMR3/TM.cpp@ 104557

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