TM.cpp@ 102828

Last change on this file since 102828 was 100000, checked in by vboxsync, 19 months ago
VMM: Take the vTimer expiration into account when halting due to a WFI/WFE instruction so the guest gets woken up if no other event is pending, bugref:10389
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1	/* $Id: TM.cpp 100000 2023-05-30 06:09:42Z 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	"ScheduleSlack\|"
338	"CatchUpStopThreshold\|"
339	"CatchUpGiveUpThreshold\|"
340	"CatchUpStartThreshold0\|CatchUpStartThreshold1\|CatchUpStartThreshold2\|CatchUpStartThreshold3\|"
341	"CatchUpStartThreshold4\|CatchUpStartThreshold5\|CatchUpStartThreshold6\|CatchUpStartThreshold7\|"
342	"CatchUpStartThreshold8\|CatchUpStartThreshold9\|"
343	"CatchUpPrecentage0\|CatchUpPrecentage1\|CatchUpPrecentage2\|CatchUpPrecentage3\|"
344	"CatchUpPrecentage4\|CatchUpPrecentage5\|CatchUpPrecentage6\|CatchUpPrecentage7\|"
345	"CatchUpPrecentage8\|CatchUpPrecentage9\|"
346	"UTCOffset\|"
347	"UTCTouchFileOnJump\|"
348	"WarpDrivePercentage\|"
349	"HostHzMax\|"
350	"HostHzFudgeFactorTimerCpu\|"
351	"HostHzFudgeFactorOtherCpu\|"
352	"HostHzFudgeFactorCatchUp100\|"
353	"HostHzFudgeFactorCatchUp200\|"
354	"HostHzFudgeFactorCatchUp400\|"
355	"TimerMillies"
356	,
357	"",
358	"TM", 0);
359	if (RT_FAILURE(rc))
360	return rc;
361
362	/*
363	* Determine the TSC configuration and frequency.
364	*/
365	/** @cfgm{/TM/TSCMode, string, Depends on the CPU and VM config}
366	* The name of the TSC mode to use: VirtTSCEmulated, RealTSCOffset or Dynamic.
367	* The default depends on the VM configuration and the capabilities of the
368	* host CPU. Other config options or runtime changes may override the TSC
369	* mode specified here.
370	*/
371	char szTSCMode[32];
372	rc = CFGMR3QueryString(pCfgHandle, "TSCMode", szTSCMode, sizeof(szTSCMode));
373	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
374	{
375	/** @todo Rainy-day/never: Dynamic mode isn't currently suitable for SMP VMs, so
376	* fall back on the more expensive emulated mode. With the current TSC handling
377	* (frequent switching between offsetted mode and taking VM exits, on all VCPUs
378	* without any kind of coordination) will lead to inconsistent TSC behavior with
379	* guest SMP, including TSC going backwards. */
380	pVM->tm.s.enmTSCMode = NEMR3NeedSpecialTscMode(pVM) ? TMTSCMODE_NATIVE_API
381	: pVM->cCpus == 1 && tmR3HasFixedTSC(pVM) ? TMTSCMODE_DYNAMIC : TMTSCMODE_VIRT_TSC_EMULATED;
382	}
383	else if (RT_FAILURE(rc))
384	return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: Failed to querying string value \"TSCMode\""));
385	else
386	{
387	if (!RTStrCmp(szTSCMode, "VirtTSCEmulated"))
388	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
389	else if (!RTStrCmp(szTSCMode, "RealTSCOffset"))
390	pVM->tm.s.enmTSCMode = TMTSCMODE_REAL_TSC_OFFSET;
391	else if (!RTStrCmp(szTSCMode, "Dynamic"))
392	pVM->tm.s.enmTSCMode = TMTSCMODE_DYNAMIC;
393	else
394	return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: Unrecognized TM TSC mode value \"%s\""), szTSCMode);
395	if (NEMR3NeedSpecialTscMode(pVM))
396	{
397	LogRel(("TM: NEM overrides the /TM/TSCMode=%s settings.\n", szTSCMode));
398	pVM->tm.s.enmTSCMode = TMTSCMODE_NATIVE_API;
399	}
400	}
401
402	/**
403	* @cfgm{/TM/TSCModeSwitchAllowed, bool, Whether TM TSC mode switch is allowed
404	* at runtime}
405	* When using paravirtualized guests, we dynamically switch TSC modes to a more
406	* optimal one for performance. This setting allows overriding this behaviour.
407	*/
408	rc = CFGMR3QueryBool(pCfgHandle, "TSCModeSwitchAllowed", &pVM->tm.s.fTSCModeSwitchAllowed);
409	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
410	{
411	/* This is finally determined in TMR3InitFinalize() as GIM isn't initialized yet. */
412	pVM->tm.s.fTSCModeSwitchAllowed = true;
413	}
414	else if (RT_FAILURE(rc))
415	return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: Failed to querying bool value \"TSCModeSwitchAllowed\""));
416	if (pVM->tm.s.fTSCModeSwitchAllowed && pVM->tm.s.enmTSCMode == TMTSCMODE_NATIVE_API)
417	{
418	LogRel(("TM: NEM overrides the /TM/TSCModeSwitchAllowed setting.\n"));
419	pVM->tm.s.fTSCModeSwitchAllowed = false;
420	}
421
422	/** @cfgm{/TM/TSCTicksPerSecond, uint32_t, Current TSC frequency from GIP}
423	* The number of TSC ticks per second (i.e. the TSC frequency). This will
424	* override enmTSCMode.
425	*/
426	pVM->tm.s.cTSCTicksPerSecondHost = tmR3CalibrateTSC();
427	rc = CFGMR3QueryU64(pCfgHandle, "TSCTicksPerSecond", &pVM->tm.s.cTSCTicksPerSecond);
428	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
429	{
430	pVM->tm.s.cTSCTicksPerSecond = pVM->tm.s.cTSCTicksPerSecondHost;
431	if ( ( pVM->tm.s.enmTSCMode == TMTSCMODE_DYNAMIC
432	\|\| pVM->tm.s.enmTSCMode == TMTSCMODE_VIRT_TSC_EMULATED)
433	&& pVM->tm.s.cTSCTicksPerSecond >= _4G)
434	{
435	pVM->tm.s.cTSCTicksPerSecond = _4G - 1; /* (A limitation of our math code) */
436	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
437	}
438	}
439	else if (RT_FAILURE(rc))
440	return VMSetError(pVM, rc, RT_SRC_POS,
441	N_("Configuration error: Failed to querying uint64_t value \"TSCTicksPerSecond\""));
442	else if ( pVM->tm.s.cTSCTicksPerSecond < _1M
443	\|\| pVM->tm.s.cTSCTicksPerSecond >= _4G)
444	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS,
445	N_("Configuration error: \"TSCTicksPerSecond\" = %RI64 is not in the range 1MHz..4GHz-1"),
446	pVM->tm.s.cTSCTicksPerSecond);
447	else if (pVM->tm.s.enmTSCMode != TMTSCMODE_NATIVE_API)
448	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
449	else
450	{
451	LogRel(("TM: NEM overrides the /TM/TSCTicksPerSecond=%RU64 setting.\n", pVM->tm.s.cTSCTicksPerSecond));
452	pVM->tm.s.cTSCTicksPerSecond = pVM->tm.s.cTSCTicksPerSecondHost;
453	}
454
455	/** @cfgm{/TM/TSCTiedToExecution, bool, false}
456	* Whether the TSC should be tied to execution. This will exclude most of the
457	* virtualization overhead, but will by default include the time spent in the
458	* halt state (see TM/TSCNotTiedToHalt). This setting will override all other
459	* TSC settings except for TSCTicksPerSecond and TSCNotTiedToHalt, which should
460	* be used avoided or used with great care. Note that this will only work right
461	* together with VT-x or AMD-V, and with a single virtual CPU. */
462	rc = CFGMR3QueryBoolDef(pCfgHandle, "TSCTiedToExecution", &pVM->tm.s.fTSCTiedToExecution, false);
463	if (RT_FAILURE(rc))
464	return VMSetError(pVM, rc, RT_SRC_POS,
465	N_("Configuration error: Failed to querying bool value \"TSCTiedToExecution\""));
466	if (pVM->tm.s.fTSCTiedToExecution && pVM->tm.s.enmTSCMode == TMTSCMODE_NATIVE_API)
467	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, N_("/TM/TSCTiedToExecution is not supported in NEM mode!"));
468	if (pVM->tm.s.fTSCTiedToExecution)
469	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
470
471
472	/** @cfgm{/TM/TSCNotTiedToHalt, bool, false}
473	* This is used with /TM/TSCTiedToExecution to control how TSC operates
474	* accross HLT instructions. When true HLT is considered execution time and
475	* TSC continues to run, while when false (default) TSC stops during halt. */
476	rc = CFGMR3QueryBoolDef(pCfgHandle, "TSCNotTiedToHalt", &pVM->tm.s.fTSCNotTiedToHalt, false);
477	if (RT_FAILURE(rc))
478	return VMSetError(pVM, rc, RT_SRC_POS,
479	N_("Configuration error: Failed to querying bool value \"TSCNotTiedToHalt\""));
480
481	/*
482	* Configure the timer synchronous virtual time.
483	*/
484	/** @cfgm{/TM/ScheduleSlack, uint32_t, ns, 0, UINT32_MAX, 100000}
485	* Scheduling slack when processing timers. */
486	rc = CFGMR3QueryU32(pCfgHandle, "ScheduleSlack", &pVM->tm.s.u32VirtualSyncScheduleSlack);
487	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
488	pVM->tm.s.u32VirtualSyncScheduleSlack = 100000; /* 0.100ms (ASSUMES virtual time is nanoseconds) */
489	else if (RT_FAILURE(rc))
490	return VMSetError(pVM, rc, RT_SRC_POS,
491	N_("Configuration error: Failed to querying 32-bit integer value \"ScheduleSlack\""));
492
493	/** @cfgm{/TM/CatchUpStopThreshold, uint64_t, ns, 0, UINT64_MAX, 500000}
494	* When to stop a catch-up, considering it successful. */
495	rc = CFGMR3QueryU64(pCfgHandle, "CatchUpStopThreshold", &pVM->tm.s.u64VirtualSyncCatchUpStopThreshold);
496	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
497	pVM->tm.s.u64VirtualSyncCatchUpStopThreshold = 500000; /* 0.5ms */
498	else if (RT_FAILURE(rc))
499	return VMSetError(pVM, rc, RT_SRC_POS,
500	N_("Configuration error: Failed to querying 64-bit integer value \"CatchUpStopThreshold\""));
501
502	/** @cfgm{/TM/CatchUpGiveUpThreshold, uint64_t, ns, 0, UINT64_MAX, 60000000000}
503	* When to give up a catch-up attempt. */
504	rc = CFGMR3QueryU64(pCfgHandle, "CatchUpGiveUpThreshold", &pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold);
505	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
506	pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold = UINT64_C(60000000000); /* 60 sec */
507	else if (RT_FAILURE(rc))
508	return VMSetError(pVM, rc, RT_SRC_POS,
509	N_("Configuration error: Failed to querying 64-bit integer value \"CatchUpGiveUpThreshold\""));
510
511
512	/** @cfgm{/TM/CatchUpPrecentage[0..9], uint32_t, %, 1, 2000, various}
513	* The catch-up percent for a given period. */
514	/** @cfgm{/TM/CatchUpStartThreshold[0..9], uint64_t, ns, 0, UINT64_MAX}
515	* The catch-up period threshold, or if you like, when a period starts. */
516	#define TM_CFG_PERIOD(iPeriod, DefStart, DefPct) \
517	do \
518	{ \
519	uint64_t u64; \
520	rc = CFGMR3QueryU64(pCfgHandle, "CatchUpStartThreshold" #iPeriod, &u64); \
521	if (rc == VERR_CFGM_VALUE_NOT_FOUND) \
522	u64 = UINT64_C(DefStart); \
523	else if (RT_FAILURE(rc)) \
524	return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: Failed to querying 64-bit integer value \"CatchUpThreshold" #iPeriod "\"")); \
525	if ( (iPeriod > 0 && u64 <= pVM->tm.s.aVirtualSyncCatchUpPeriods[iPeriod - 1].u64Start) \
526	\|\| u64 >= pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold) \
527	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, N_("Configuration error: Invalid start of period #" #iPeriod ": %'RU64"), u64); \
528	pVM->tm.s.aVirtualSyncCatchUpPeriods[iPeriod].u64Start = u64; \
529	rc = CFGMR3QueryU32(pCfgHandle, "CatchUpPrecentage" #iPeriod, &pVM->tm.s.aVirtualSyncCatchUpPeriods[iPeriod].u32Percentage); \
530	if (rc == VERR_CFGM_VALUE_NOT_FOUND) \
531	pVM->tm.s.aVirtualSyncCatchUpPeriods[iPeriod].u32Percentage = (DefPct); \
532	else if (RT_FAILURE(rc)) \
533	return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: Failed to querying 32-bit integer value \"CatchUpPrecentage" #iPeriod "\"")); \
534	} while (0)
535	/* This needs more tuning. Not sure if we really need so many period and be so gentle. */
536	TM_CFG_PERIOD(0, 750000, 5); /* 0.75ms at 1.05x */
537	TM_CFG_PERIOD(1, 1500000, 10); /* 1.50ms at 1.10x */
538	TM_CFG_PERIOD(2, 8000000, 25); /* 8ms at 1.25x */
539	TM_CFG_PERIOD(3, 30000000, 50); /* 30ms at 1.50x */
540	TM_CFG_PERIOD(4, 75000000, 75); /* 75ms at 1.75x */
541	TM_CFG_PERIOD(5, 175000000, 100); /* 175ms at 2x */
542	TM_CFG_PERIOD(6, 500000000, 200); /* 500ms at 3x */
543	TM_CFG_PERIOD(7, 3000000000, 300); /* 3s at 4x */
544	TM_CFG_PERIOD(8,30000000000, 400); /* 30s at 5x */
545	TM_CFG_PERIOD(9,55000000000, 500); /* 55s at 6x */
546	AssertCompile(RT_ELEMENTS(pVM->tm.s.aVirtualSyncCatchUpPeriods) == 10);
547	#undef TM_CFG_PERIOD
548
549	/*
550	* Configure real world time (UTC).
551	*/
552	/** @cfgm{/TM/UTCOffset, int64_t, ns, INT64_MIN, INT64_MAX, 0}
553	* The UTC offset. This is used to put the guest back or forwards in time. */
554	rc = CFGMR3QueryS64(pCfgHandle, "UTCOffset", &pVM->tm.s.offUTC);
555	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
556	pVM->tm.s.offUTC = 0; /* ns */
557	else if (RT_FAILURE(rc))
558	return VMSetError(pVM, rc, RT_SRC_POS,
559	N_("Configuration error: Failed to querying 64-bit integer value \"UTCOffset\""));
560
561	/** @cfgm{/TM/UTCTouchFileOnJump, string, none}
562	* File to be written to everytime the host time jumps. */
563	rc = CFGMR3QueryStringAlloc(pCfgHandle, "UTCTouchFileOnJump", &pVM->tm.s.pszUtcTouchFileOnJump);
564	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
565	pVM->tm.s.pszUtcTouchFileOnJump = NULL;
566	else if (RT_FAILURE(rc))
567	return VMSetError(pVM, rc, RT_SRC_POS,
568	N_("Configuration error: Failed to querying string value \"UTCTouchFileOnJump\""));
569
570	/*
571	* Setup the warp drive.
572	*/
573	/** @cfgm{/TM/WarpDrivePercentage, uint32_t, %, 0, 20000, 100}
574	* The warp drive percentage, 100% is normal speed. This is used to speed up
575	* or slow down the virtual clock, which can be useful for fast forwarding
576	* borring periods during tests. */
577	rc = CFGMR3QueryU32(pCfgHandle, "WarpDrivePercentage", &pVM->tm.s.u32VirtualWarpDrivePercentage);
578	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
579	rc = CFGMR3QueryU32(CFGMR3GetRoot(pVM), "WarpDrivePercentage", &pVM->tm.s.u32VirtualWarpDrivePercentage); /* legacy */
580	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
581	pVM->tm.s.u32VirtualWarpDrivePercentage = 100;
582	else if (RT_FAILURE(rc))
583	return VMSetError(pVM, rc, RT_SRC_POS,
584	N_("Configuration error: Failed to querying uint32_t value \"WarpDrivePercent\""));
585	else if ( pVM->tm.s.u32VirtualWarpDrivePercentage < 2
586	\|\| pVM->tm.s.u32VirtualWarpDrivePercentage > 20000)
587	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS,
588	N_("Configuration error: \"WarpDrivePercent\" = %RI32 is not in the range 2..20000"),
589	pVM->tm.s.u32VirtualWarpDrivePercentage);
590	pVM->tm.s.fVirtualWarpDrive = pVM->tm.s.u32VirtualWarpDrivePercentage != 100;
591	if (pVM->tm.s.fVirtualWarpDrive)
592	{
593	if (pVM->tm.s.enmTSCMode == TMTSCMODE_NATIVE_API)
594	LogRel(("TM: Warp-drive active, escept for TSC which is in NEM mode. u32VirtualWarpDrivePercentage=%RI32\n",
595	pVM->tm.s.u32VirtualWarpDrivePercentage));
596	else
597	{
598	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
599	LogRel(("TM: Warp-drive active. u32VirtualWarpDrivePercentage=%RI32\n", pVM->tm.s.u32VirtualWarpDrivePercentage));
600	}
601	}
602
603	/*
604	* Gather the Host Hz configuration values.
605	*/
606	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzMax", &pVM->tm.s.cHostHzMax, 20000);
607	if (RT_FAILURE(rc))
608	return VMSetError(pVM, rc, RT_SRC_POS,
609	N_("Configuration error: Failed to querying uint32_t value \"HostHzMax\""));
610
611	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzFudgeFactorTimerCpu", &pVM->tm.s.cPctHostHzFudgeFactorTimerCpu, 111);
612	if (RT_FAILURE(rc))
613	return VMSetError(pVM, rc, RT_SRC_POS,
614	N_("Configuration error: Failed to querying uint32_t value \"HostHzFudgeFactorTimerCpu\""));
615
616	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzFudgeFactorOtherCpu", &pVM->tm.s.cPctHostHzFudgeFactorOtherCpu, 110);
617	if (RT_FAILURE(rc))
618	return VMSetError(pVM, rc, RT_SRC_POS,
619	N_("Configuration error: Failed to querying uint32_t value \"HostHzFudgeFactorOtherCpu\""));
620
621	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzFudgeFactorCatchUp100", &pVM->tm.s.cPctHostHzFudgeFactorCatchUp100, 300);
622	if (RT_FAILURE(rc))
623	return VMSetError(pVM, rc, RT_SRC_POS,
624	N_("Configuration error: Failed to querying uint32_t value \"HostHzFudgeFactorCatchUp100\""));
625
626	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzFudgeFactorCatchUp200", &pVM->tm.s.cPctHostHzFudgeFactorCatchUp200, 250);
627	if (RT_FAILURE(rc))
628	return VMSetError(pVM, rc, RT_SRC_POS,
629	N_("Configuration error: Failed to querying uint32_t value \"HostHzFudgeFactorCatchUp200\""));
630
631	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzFudgeFactorCatchUp400", &pVM->tm.s.cPctHostHzFudgeFactorCatchUp400, 200);
632	if (RT_FAILURE(rc))
633	return VMSetError(pVM, rc, RT_SRC_POS,
634	N_("Configuration error: Failed to querying uint32_t value \"HostHzFudgeFactorCatchUp400\""));
635
636	/*
637	* Finally, setup and report.
638	*/
639	pVM->tm.s.enmOriginalTSCMode = pVM->tm.s.enmTSCMode;
640	#if !defined(VBOX_VMM_TARGET_ARMV8)
641	CPUMR3SetCR4Feature(pVM, X86_CR4_TSD, ~X86_CR4_TSD);
642	#endif
643	LogRel(("TM: cTSCTicksPerSecond=%'RU64 (%#RX64) enmTSCMode=%d (%s)\n"
644	"TM: cTSCTicksPerSecondHost=%'RU64 (%#RX64)\n"
645	"TM: TSCTiedToExecution=%RTbool TSCNotTiedToHalt=%RTbool\n",
646	pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.enmTSCMode, tmR3GetTSCModeName(pVM),
647	pVM->tm.s.cTSCTicksPerSecondHost, pVM->tm.s.cTSCTicksPerSecondHost,
648	pVM->tm.s.fTSCTiedToExecution, pVM->tm.s.fTSCNotTiedToHalt));
649
650	/*
651	* Start the timer (guard against REM not yielding).
652	*/
653	/** @cfgm{/TM/TimerMillies, uint32_t, ms, 1, 1000, 10}
654	* The watchdog timer interval. */
655	uint32_t u32Millies;
656	rc = CFGMR3QueryU32(pCfgHandle, "TimerMillies", &u32Millies);
657	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
658	u32Millies = VM_IS_HM_ENABLED(pVM) ? 1000 : 10;
659	else if (RT_FAILURE(rc))
660	return VMSetError(pVM, rc, RT_SRC_POS,
661	N_("Configuration error: Failed to query uint32_t value \"TimerMillies\""));
662	rc = RTTimerCreate(&pVM->tm.s.pTimer, u32Millies, tmR3TimerCallback, pVM);
663	if (RT_FAILURE(rc))
664	{
665	AssertMsgFailed(("Failed to create timer, u32Millies=%d rc=%Rrc.\n", u32Millies, rc));
666	return rc;
667	}
668	Log(("TM: Created timer %p firing every %d milliseconds\n", pVM->tm.s.pTimer, u32Millies));
669	pVM->tm.s.u32TimerMillies = u32Millies;
670
671	/*
672	* Register saved state.
673	*/
674	rc = SSMR3RegisterInternal(pVM, "tm", 1, TM_SAVED_STATE_VERSION, sizeof(uint64_t) * 8,
675	NULL, NULL, NULL,
676	NULL, tmR3Save, NULL,
677	NULL, tmR3Load, NULL);
678	if (RT_FAILURE(rc))
679	return rc;
680
681	/*
682	* Register statistics.
683	*/
684	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).");
685	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).");
686	#if 0 /** @todo retreive from ring-0 */
687	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).");
688	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).");
689	#endif
690	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)");
691	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.");
692	STAM_REL_REG( pVM,(void*)&pVM->tm.s.HzHint.s.uMax, STAMTYPE_U32, "/TM/MaxHzHint", STAMUNIT_HZ, "Max guest timer frequency hint.");
693	for (uint32_t i = 0; i < RT_ELEMENTS(pVM->tm.s.aTimerQueues); i++)
694	{
695	rc = STAMR3RegisterF(pVM, (void *)&pVM->tm.s.aTimerQueues[i].uMaxHzHint, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, STAMUNIT_HZ,
696	"", "/TM/MaxHzHint/%s", pVM->tm.s.aTimerQueues[i].szName);
697	AssertRC(rc);
698	}
699
700	#ifdef VBOX_WITH_STATISTICS
701	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).");
702	STAM_REG_USED(pVM,(void *)&pVM->tm.s.VirtualGetRawData.cUpdateRaces,STAMTYPE_U32, "/TM/R3/cUpdateRaces", STAMUNIT_OCCURENCES, "Thread races when updating the previous timestamp.");
703	# if 0 /** @todo retreive from ring-0 */
704	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).");
705	STAM_REG_USED(pVM,(void *)&pVM->tm.s.VirtualGetRawDataR0.cUpdateRaces,STAMTYPE_U32, "/TM/R0/cUpdateRaces", STAMUNIT_OCCURENCES, "Thread races when updating the previous timestamp.");
706	# endif
707	STAM_REG(pVM, &pVM->tm.s.StatDoQueues, STAMTYPE_PROFILE, "/TM/DoQueues", STAMUNIT_TICKS_PER_CALL, "Profiling timer TMR3TimerQueuesDo.");
708	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.");
709	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.");
710	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.");
711
712	STAM_REG(pVM, &pVM->tm.s.StatPoll, STAMTYPE_COUNTER, "/TM/Poll", STAMUNIT_OCCURENCES, "TMTimerPoll calls.");
713	STAM_REG(pVM, &pVM->tm.s.StatPollAlreadySet, STAMTYPE_COUNTER, "/TM/Poll/AlreadySet", STAMUNIT_OCCURENCES, "TMTimerPoll calls where the FF was already set.");
714	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.");
715	STAM_REG(pVM, &pVM->tm.s.StatPollMiss, STAMTYPE_COUNTER, "/TM/Poll/Miss", STAMUNIT_OCCURENCES, "TMTimerPoll calls where nothing had expired.");
716	STAM_REG(pVM, &pVM->tm.s.StatPollRunning, STAMTYPE_COUNTER, "/TM/Poll/Running", STAMUNIT_OCCURENCES, "TMTimerPoll calls where the queues were being run.");
717	STAM_REG(pVM, &pVM->tm.s.StatPollSimple, STAMTYPE_COUNTER, "/TM/Poll/Simple", STAMUNIT_OCCURENCES, "TMTimerPoll calls where we could take the simple path.");
718	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.");
719	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.");
720
721	STAM_REG(pVM, &pVM->tm.s.StatPostponedR3, STAMTYPE_COUNTER, "/TM/PostponedR3", STAMUNIT_OCCURENCES, "Postponed due to unschedulable state, in ring-3.");
722	STAM_REG(pVM, &pVM->tm.s.StatPostponedRZ, STAMTYPE_COUNTER, "/TM/PostponedRZ", STAMUNIT_OCCURENCES, "Postponed due to unschedulable state, in ring-0 / RC.");
723
724	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.");
725	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.");
726	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.");
727
728	STAM_REG(pVM, &pVM->tm.s.StatTimerSet, STAMTYPE_COUNTER, "/TM/TimerSet", STAMUNIT_OCCURENCES, "Calls, except virtual sync timers");
729	STAM_REG(pVM, &pVM->tm.s.StatTimerSetOpt, STAMTYPE_COUNTER, "/TM/TimerSet/Opt", STAMUNIT_OCCURENCES, "Optimized path taken.");
730	STAM_REG(pVM, &pVM->tm.s.StatTimerSetR3, STAMTYPE_PROFILE, "/TM/TimerSet/R3", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerSet calls made in ring-3.");
731	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRZ, STAMTYPE_PROFILE, "/TM/TimerSet/RZ", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerSet calls made in ring-0 / RC.");
732	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStActive, STAMTYPE_COUNTER, "/TM/TimerSet/StActive", STAMUNIT_OCCURENCES, "ACTIVE");
733	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStExpDeliver, STAMTYPE_COUNTER, "/TM/TimerSet/StExpDeliver", STAMUNIT_OCCURENCES, "EXPIRED_DELIVER");
734	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStOther, STAMTYPE_COUNTER, "/TM/TimerSet/StOther", STAMUNIT_OCCURENCES, "Other states");
735	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStPendStop, STAMTYPE_COUNTER, "/TM/TimerSet/StPendStop", STAMUNIT_OCCURENCES, "PENDING_STOP");
736	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStPendStopSched, STAMTYPE_COUNTER, "/TM/TimerSet/StPendStopSched", STAMUNIT_OCCURENCES, "PENDING_STOP_SCHEDULE");
737	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStPendSched, STAMTYPE_COUNTER, "/TM/TimerSet/StPendSched", STAMUNIT_OCCURENCES, "PENDING_SCHEDULE");
738	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStPendResched, STAMTYPE_COUNTER, "/TM/TimerSet/StPendResched", STAMUNIT_OCCURENCES, "PENDING_RESCHEDULE");
739	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStStopped, STAMTYPE_COUNTER, "/TM/TimerSet/StStopped", STAMUNIT_OCCURENCES, "STOPPED");
740
741	STAM_REG(pVM, &pVM->tm.s.StatTimerSetVs, STAMTYPE_COUNTER, "/TM/TimerSetVs", STAMUNIT_OCCURENCES, "TMTimerSet calls on virtual sync timers");
742	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.");
743	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.");
744	STAM_REG(pVM, &pVM->tm.s.StatTimerSetVsStActive, STAMTYPE_COUNTER, "/TM/TimerSetVs/StActive", STAMUNIT_OCCURENCES, "ACTIVE");
745	STAM_REG(pVM, &pVM->tm.s.StatTimerSetVsStExpDeliver, STAMTYPE_COUNTER, "/TM/TimerSetVs/StExpDeliver", STAMUNIT_OCCURENCES, "EXPIRED_DELIVER");
746	STAM_REG(pVM, &pVM->tm.s.StatTimerSetVsStStopped, STAMTYPE_COUNTER, "/TM/TimerSetVs/StStopped", STAMUNIT_OCCURENCES, "STOPPED");
747
748	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelative, STAMTYPE_COUNTER, "/TM/TimerSetRelative", STAMUNIT_OCCURENCES, "Calls, except virtual sync timers");
749	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeOpt, STAMTYPE_COUNTER, "/TM/TimerSetRelative/Opt", STAMUNIT_OCCURENCES, "Optimized path taken.");
750	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).");
751	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).");
752	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStActive, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StActive", STAMUNIT_OCCURENCES, "ACTIVE");
753	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStExpDeliver, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StExpDeliver", STAMUNIT_OCCURENCES, "EXPIRED_DELIVER");
754	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStOther, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StOther", STAMUNIT_OCCURENCES, "Other states");
755	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStPendStop, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StPendStop", STAMUNIT_OCCURENCES, "PENDING_STOP");
756	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStPendStopSched, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StPendStopSched",STAMUNIT_OCCURENCES, "PENDING_STOP_SCHEDULE");
757	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStPendSched, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StPendSched", STAMUNIT_OCCURENCES, "PENDING_SCHEDULE");
758	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStPendResched, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StPendResched", STAMUNIT_OCCURENCES, "PENDING_RESCHEDULE");
759	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStStopped, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StStopped", STAMUNIT_OCCURENCES, "STOPPED");
760
761	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeVs, STAMTYPE_COUNTER, "/TM/TimerSetRelativeVs", STAMUNIT_OCCURENCES, "TMTimerSetRelative calls on virtual sync timers");
762	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.");
763	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.");
764	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeVsStActive, STAMTYPE_COUNTER, "/TM/TimerSetRelativeVs/StActive", STAMUNIT_OCCURENCES, "ACTIVE");
765	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeVsStExpDeliver, STAMTYPE_COUNTER, "/TM/TimerSetRelativeVs/StExpDeliver", STAMUNIT_OCCURENCES, "EXPIRED_DELIVER");
766	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeVsStStopped, STAMTYPE_COUNTER, "/TM/TimerSetRelativeVs/StStopped", STAMUNIT_OCCURENCES, "STOPPED");
767
768	STAM_REG(pVM, &pVM->tm.s.StatTimerStopR3, STAMTYPE_PROFILE, "/TM/TimerStopR3", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerStop calls made in ring-3.");
769	STAM_REG(pVM, &pVM->tm.s.StatTimerStopRZ, STAMTYPE_PROFILE, "/TM/TimerStopRZ", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerStop calls made in ring-0 / RC.");
770
771	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.");
772	STAM_REG(pVM, &pVM->tm.s.StatVirtualGetSetFF, STAMTYPE_COUNTER, "/TM/VirtualGetSetFF", STAMUNIT_OCCURENCES, "Times we set the FF when calling TMTimerGet.");
773	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGet, STAMTYPE_COUNTER, "/TM/VirtualSyncGet", STAMUNIT_OCCURENCES, "The number of times tmVirtualSyncGetEx was called.");
774	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGetAdjLast, STAMTYPE_COUNTER, "/TM/VirtualSyncGet/AdjLast", STAMUNIT_OCCURENCES, "Times we've adjusted against the last returned time stamp .");
775	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.");
776	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGetExpired, STAMTYPE_COUNTER, "/TM/VirtualSyncGet/Expired", STAMUNIT_OCCURENCES, "Times tmVirtualSyncGetEx encountered an expired timer stopping the clock.");
777	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGetLocked, STAMTYPE_COUNTER, "/TM/VirtualSyncGet/Locked", STAMUNIT_OCCURENCES, "Times we successfully acquired the lock in tmVirtualSyncGetEx.");
778	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGetLockless, STAMTYPE_COUNTER, "/TM/VirtualSyncGet/Lockless", STAMUNIT_OCCURENCES, "Times tmVirtualSyncGetEx returned without needing to take the lock.");
779	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGetSetFF, STAMTYPE_COUNTER, "/TM/VirtualSyncGet/SetFF", STAMUNIT_OCCURENCES, "Times we set the FF when calling tmVirtualSyncGetEx.");
780	STAM_REG(pVM, &pVM->tm.s.StatVirtualPause, STAMTYPE_COUNTER, "/TM/VirtualPause", STAMUNIT_OCCURENCES, "The number of times TMR3TimerPause was called.");
781	STAM_REG(pVM, &pVM->tm.s.StatVirtualResume, STAMTYPE_COUNTER, "/TM/VirtualResume", STAMUNIT_OCCURENCES, "The number of times TMR3TimerResume was called.");
782
783	STAM_REG(pVM, &pVM->tm.s.StatTimerCallbackSetFF, STAMTYPE_COUNTER, "/TM/CallbackSetFF", STAMUNIT_OCCURENCES, "The number of times the timer callback set FF.");
784	STAM_REG(pVM, &pVM->tm.s.StatTimerCallback, STAMTYPE_COUNTER, "/TM/Callback", STAMUNIT_OCCURENCES, "The number of times the timer callback is invoked.");
785
786	STAM_REG(pVM, &pVM->tm.s.StatTSCCatchupLE010, STAMTYPE_COUNTER, "/TM/TSC/Intercept/CatchupLE010", STAMUNIT_OCCURENCES, "In catch-up mode, 10% or lower.");
787	STAM_REG(pVM, &pVM->tm.s.StatTSCCatchupLE025, STAMTYPE_COUNTER, "/TM/TSC/Intercept/CatchupLE025", STAMUNIT_OCCURENCES, "In catch-up mode, 25%-11%.");
788	STAM_REG(pVM, &pVM->tm.s.StatTSCCatchupLE100, STAMTYPE_COUNTER, "/TM/TSC/Intercept/CatchupLE100", STAMUNIT_OCCURENCES, "In catch-up mode, 100%-26%.");
789	STAM_REG(pVM, &pVM->tm.s.StatTSCCatchupOther, STAMTYPE_COUNTER, "/TM/TSC/Intercept/CatchupOther", STAMUNIT_OCCURENCES, "In catch-up mode, > 100%.");
790	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.");
791	STAM_REG(pVM, &pVM->tm.s.StatTSCNotTicking, STAMTYPE_COUNTER, "/TM/TSC/Intercept/NotTicking", STAMUNIT_OCCURENCES, "TSC is not ticking.");
792	STAM_REG(pVM, &pVM->tm.s.StatTSCSyncNotTicking, STAMTYPE_COUNTER, "/TM/TSC/Intercept/SyncNotTicking", STAMUNIT_OCCURENCES, "VirtualSync isn't ticking.");
793	STAM_REG(pVM, &pVM->tm.s.StatTSCWarp, STAMTYPE_COUNTER, "/TM/TSC/Intercept/Warp", STAMUNIT_OCCURENCES, "Warpdrive is active.");
794	STAM_REG(pVM, &pVM->tm.s.StatTSCSet, STAMTYPE_COUNTER, "/TM/TSC/Sets", STAMUNIT_OCCURENCES, "Calls to TMCpuTickSet.");
795	STAM_REG(pVM, &pVM->tm.s.StatTSCUnderflow, STAMTYPE_COUNTER, "/TM/TSC/Underflow", STAMUNIT_OCCURENCES, "TSC underflow; corrected with last seen value .");
796	STAM_REG(pVM, &pVM->tm.s.StatVirtualPause, STAMTYPE_COUNTER, "/TM/TSC/Pause", STAMUNIT_OCCURENCES, "The number of times the TSC was paused.");
797	STAM_REG(pVM, &pVM->tm.s.StatVirtualResume, STAMTYPE_COUNTER, "/TM/TSC/Resume", STAMUNIT_OCCURENCES, "The number of times the TSC was resumed.");
798	#endif /* VBOX_WITH_STATISTICS */
799
800	for (VMCPUID i = 0; i < pVM->cCpus; i++)
801	{
802	PVMCPU pVCpu = pVM->apCpusR3[i];
803	STAMR3RegisterF(pVM, &pVCpu->tm.s.offTSCRawSrc, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS, "TSC offset relative the raw source", "/TM/TSC/offCPU%u", i);
804	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
805	# if defined(VBOX_WITH_STATISTICS) \|\| defined(VBOX_WITH_NS_ACCOUNTING_STATS)
806	STAMR3RegisterF(pVM, &pVCpu->tm.s.StatNsTotal, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_NS, "Resettable: Total CPU run time.", "/TM/CPU/%02u", i);
807	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);
808	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);
809	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);
810	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);
811	STAMR3RegisterF(pVM, &pVCpu->tm.s.StatNsHalted, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_NS_PER_OCCURENCE, "Resettable: Time spent halted.", "/TM/CPU/%02u/PrfHalted", i);
812	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);
813	# endif
814	STAMR3RegisterF(pVM, &pVCpu->tm.s.cNsTotalStat, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_NS, "Total CPU run time.", "/TM/CPU/%02u/cNsTotal", i);
815	STAMR3RegisterF(pVM, &pVCpu->tm.s.cNsExecuting, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_NS, "Time spent executing guest code.", "/TM/CPU/%02u/cNsExecuting", i);
816	STAMR3RegisterF(pVM, &pVCpu->tm.s.cNsHalted, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_NS, "Time spent halted.", "/TM/CPU/%02u/cNsHalted", i);
817	STAMR3RegisterF(pVM, &pVCpu->tm.s.cNsOtherStat, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_NS, "Time spent in the VMM or preempted.", "/TM/CPU/%02u/cNsOther", i);
818	STAMR3RegisterF(pVM, &pVCpu->tm.s.cPeriodsExecuting, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT, "Times executed guest code.", "/TM/CPU/%02u/cPeriodsExecuting", i);
819	STAMR3RegisterF(pVM, &pVCpu->tm.s.cPeriodsHalted, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT, "Times halted.", "/TM/CPU/%02u/cPeriodsHalted", i);
820	STAMR3RegisterF(pVM, &pVCpu->tm.s.CpuLoad.cPctExecuting, STAMTYPE_U8, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "Time spent executing guest code recently.", "/TM/CPU/%02u/pctExecuting", i);
821	STAMR3RegisterF(pVM, &pVCpu->tm.s.CpuLoad.cPctHalted, STAMTYPE_U8, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "Time spent halted recently.", "/TM/CPU/%02u/pctHalted", i);
822	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);
823	#endif
824	}
825	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
826	STAMR3RegisterF(pVM, &pVM->tm.s.CpuLoad.cPctExecuting, STAMTYPE_U8, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "Time spent executing guest code recently.", "/TM/CPU/pctExecuting");
827	STAMR3RegisterF(pVM, &pVM->tm.s.CpuLoad.cPctHalted, STAMTYPE_U8, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "Time spent halted recently.", "/TM/CPU/pctHalted");
828	STAMR3RegisterF(pVM, &pVM->tm.s.CpuLoad.cPctOther, STAMTYPE_U8, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "Time spent in the VMM or preempted recently.", "/TM/CPU/pctOther");
829	#endif
830
831	#ifdef VBOX_WITH_STATISTICS
832	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.");
833	STAM_REG(pVM, (void *)&pVM->tm.s.fVirtualSyncCatchUp, STAMTYPE_U8, "/TM/VirtualSync/CatchUpActive", STAMUNIT_NONE, "Catch-Up active indicator.");
834	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)");
835	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.");
836	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGiveUp, STAMTYPE_COUNTER, "/TM/VirtualSync/GiveUp", STAMUNIT_OCCURENCES, "Times the catch-up was abandoned.");
837	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++.)");
838	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncRun, STAMTYPE_COUNTER, "/TM/VirtualSync/Run", STAMUNIT_OCCURENCES, "Times the virtual sync timer queue was considered.");
839	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncRunRestart, STAMTYPE_COUNTER, "/TM/VirtualSync/Run/Restarts", STAMUNIT_OCCURENCES, "Times the clock was restarted after a run.");
840	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.");
841	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncRunStoppedAlready, STAMTYPE_COUNTER, "/TM/VirtualSync/Run/StoppedAlready", STAMUNIT_OCCURENCES, "Times the clock was already stopped elsewhere (TMVirtualSyncGet).");
842	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.)");
843	for (unsigned i = 0; i < RT_ELEMENTS(pVM->tm.s.aVirtualSyncCatchUpPeriods); i++)
844	{
845	STAMR3RegisterF(pVM, &pVM->tm.s.aVirtualSyncCatchUpPeriods[i].u32Percentage, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "The catch-up percentage.", "/TM/VirtualSync/Periods/%u", i);
846	STAMR3RegisterF(pVM, &pVM->tm.s.aStatVirtualSyncCatchupAdjust[i], STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Times adjusted to this period.", "/TM/VirtualSync/Periods/%u/Adjust", i);
847	STAMR3RegisterF(pVM, &pVM->tm.s.aStatVirtualSyncCatchupInitial[i], STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Times started in this period.", "/TM/VirtualSync/Periods/%u/Initial", i);
848	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);
849	}
850	#endif /* VBOX_WITH_STATISTICS */
851
852	/*
853	* Register info handlers.
854	*/
855	DBGFR3InfoRegisterInternalEx(pVM, "timers", "Dumps all timers. No arguments.", tmR3TimerInfo, DBGFINFO_FLAGS_RUN_ON_EMT);
856	DBGFR3InfoRegisterInternalEx(pVM, "activetimers", "Dumps active all timers. No arguments.", tmR3TimerInfoActive, DBGFINFO_FLAGS_RUN_ON_EMT);
857	DBGFR3InfoRegisterInternalEx(pVM, "clocks", "Display the time of the various clocks.", tmR3InfoClocks, DBGFINFO_FLAGS_RUN_ON_EMT);
858	DBGFR3InfoRegisterInternalArgv(pVM, "cpuload", "Display the CPU load stats (--help for details).", tmR3InfoCpuLoad, 0);
859
860	return VINF_SUCCESS;
861	}
862
863
864	/**
865	* Checks if the host CPU has a fixed TSC frequency.
866	*
867	* @returns true if it has, false if it hasn't.
868	*
869	* @remarks This test doesn't bother with very old CPUs that don't do power
870	* management or any other stuff that might influence the TSC rate.
871	* This isn't currently relevant.
872	*/
873	static bool tmR3HasFixedTSC(PVM pVM)
874	{
875	/*
876	* ASSUME that if the GIP is in invariant TSC mode, it's because the CPU
877	* actually has invariant TSC.
878	*
879	* In driverless mode we just assume sync TSC for now regardless of what
880	* the case actually is.
881	*/
882	PSUPGLOBALINFOPAGE const pGip = g_pSUPGlobalInfoPage;
883	SUPGIPMODE const enmGipMode = pGip ? (SUPGIPMODE)pGip->u32Mode : SUPGIPMODE_INVARIANT_TSC;
884	if (enmGipMode == SUPGIPMODE_INVARIANT_TSC)
885	return true;
886
887	#if defined(RT_ARCH_AMD64) \|\| defined(RT_ARCH_X86)
888	/*
889	* Go by features and model info from the CPUID instruction.
890	*/
891	if (ASMHasCpuId())
892	{
893	uint32_t uEAX, uEBX, uECX, uEDX;
894
895	/*
896	* By feature. (Used to be AMD specific, intel seems to have picked it up.)
897	*/
898	ASMCpuId(0x80000000, &uEAX, &uEBX, &uECX, &uEDX);
899	if (uEAX >= 0x80000007 && RTX86IsValidExtRange(uEAX))
900	{
901	ASMCpuId(0x80000007, &uEAX, &uEBX, &uECX, &uEDX);
902	if ( (uEDX & X86_CPUID_AMD_ADVPOWER_EDX_TSCINVAR) /* TscInvariant */
903	&& enmGipMode != SUPGIPMODE_ASYNC_TSC) /* No fixed tsc if the gip timer is in async mode. */
904	return true;
905	}
906
907	/*
908	* By model.
909	*/
910	if (CPUMGetHostCpuVendor(pVM) == CPUMCPUVENDOR_AMD)
911	{
912	/*
913	* AuthenticAMD - Check for APM support and that TscInvariant is set.
914	*
915	* This test isn't correct with respect to fixed/non-fixed TSC and
916	* older models, but this isn't relevant since the result is currently
917	* only used for making a decision on AMD-V models.
918	*/
919	# if 0 /* Promoted to generic */
920	ASMCpuId(0x80000000, &uEAX, &uEBX, &uECX, &uEDX);
921	if (uEAX >= 0x80000007)
922	{
923	ASMCpuId(0x80000007, &uEAX, &uEBX, &uECX, &uEDX);
924	if ( (uEDX & X86_CPUID_AMD_ADVPOWER_EDX_TSCINVAR) /* TscInvariant */
925	&& ( enmGipMode == SUPGIPMODE_SYNC_TSC /* No fixed tsc if the gip timer is in async mode. */
926	\|\| enmGipMode == SUPGIPMODE_INVARIANT_TSC))
927	return true;
928	}
929	# endif
930	}
931	else if (CPUMGetHostCpuVendor(pVM) == CPUMCPUVENDOR_INTEL)
932	{
933	/*
934	* GenuineIntel - Check the model number.
935	*
936	* This test is lacking in the same way and for the same reasons
937	* as the AMD test above.
938	*/
939	/** @todo use RTX86GetCpuFamily() and RTX86GetCpuModel() here. */
940	ASMCpuId(1, &uEAX, &uEBX, &uECX, &uEDX);
941	unsigned uModel = (uEAX >> 4) & 0x0f;
942	unsigned uFamily = (uEAX >> 8) & 0x0f;
943	if (uFamily == 0x0f)
944	uFamily += (uEAX >> 20) & 0xff;
945	if (uFamily >= 0x06)
946	uModel += ((uEAX >> 16) & 0x0f) << 4;
947	if ( (uFamily == 0x0f /P4/ && uModel >= 0x03)
948	\|\| (uFamily == 0x06 /P2/P3/ && uModel >= 0x0e))
949	return true;
950	}
951	else if (CPUMGetHostCpuVendor(pVM) == CPUMCPUVENDOR_VIA)
952	{
953	/*
954	* CentaurHauls - Check the model, family and stepping.
955	*
956	* This only checks for VIA CPU models Nano X2, Nano X3,
957	* Eden X2 and QuadCore.
958	*/
959	/** @todo use RTX86GetCpuFamily() and RTX86GetCpuModel() here. */
960	ASMCpuId(1, &uEAX, &uEBX, &uECX, &uEDX);
961	unsigned uStepping = (uEAX & 0x0f);
962	unsigned uModel = (uEAX >> 4) & 0x0f;
963	unsigned uFamily = (uEAX >> 8) & 0x0f;
964	if ( uFamily == 0x06
965	&& uModel == 0x0f
966	&& uStepping >= 0x0c
967	&& uStepping <= 0x0f)
968	return true;
969	}
970	else if (CPUMGetHostCpuVendor(pVM) == CPUMCPUVENDOR_SHANGHAI)
971	{
972	/*
973	* Shanghai - Check the model, family and stepping.
974	*/
975	/** @todo use RTX86GetCpuFamily() and RTX86GetCpuModel() here. */
976	ASMCpuId(1, &uEAX, &uEBX, &uECX, &uEDX);
977	unsigned uFamily = (uEAX >> 8) & 0x0f;
978	if ( uFamily == 0x06
979	\|\| uFamily == 0x07)
980	{
981	return true;
982	}
983	}
984	}
985
986	# else /* !X86 && !AMD64 */
987	RT_NOREF_PV(pVM);
988	# endif /* !X86 && !AMD64 */
989	return false;
990	}
991
992
993	/**
994	* Calibrate the CPU tick.
995	*
996	* @returns Number of ticks per second.
997	*/
998	static uint64_t tmR3CalibrateTSC(void)
999	{
1000	uint64_t u64Hz;
1001
1002	/*
1003	* Use GIP when available. Prefere the nominal one, no need to wait for it.
1004	*/
1005	PSUPGLOBALINFOPAGE pGip = g_pSUPGlobalInfoPage;
1006	if (pGip)
1007	{
1008	u64Hz = pGip->u64CpuHz;
1009	if (u64Hz < _1T && u64Hz > _1M)
1010	return u64Hz;
1011	AssertFailed(); /* This shouldn't happen. */
1012
1013	u64Hz = SUPGetCpuHzFromGip(pGip);
1014	if (u64Hz < _1T && u64Hz > _1M)
1015	return u64Hz;
1016
1017	AssertFailed(); /* This shouldn't happen. */
1018	}
1019	else
1020	Assert(SUPR3IsDriverless());
1021
1022	/* Call this once first to make sure it's initialized. */
1023	RTTimeNanoTS();
1024
1025	/*
1026	* Yield the CPU to increase our chances of getting a correct value.
1027	*/
1028	RTThreadYield(); /* Try avoid interruptions between TSC and NanoTS samplings. */
1029	static const unsigned s_auSleep[5] = { 50, 30, 30, 40, 40 };
1030	uint64_t au64Samples[5];
1031	unsigned i;
1032	for (i = 0; i < RT_ELEMENTS(au64Samples); i++)
1033	{
1034	RTMSINTERVAL cMillies;
1035	int cTries = 5;
1036	uint64_t u64Start = ASMReadTSC();
1037	uint64_t u64End;
1038	uint64_t StartTS = RTTimeNanoTS();
1039	uint64_t EndTS;
1040	do
1041	{
1042	RTThreadSleep(s_auSleep[i]);
1043	u64End = ASMReadTSC();
1044	EndTS = RTTimeNanoTS();
1045	cMillies = (RTMSINTERVAL)((EndTS - StartTS + 500000) / 1000000);
1046	} while ( cMillies == 0 /* the sleep may be interrupted... */
1047	\|\| (cMillies < 20 && --cTries > 0));
1048	uint64_t u64Diff = u64End - u64Start;
1049
1050	au64Samples[i] = (u64Diff * 1000) / cMillies;
1051	AssertMsg(cTries > 0, ("cMillies=%d i=%d\n", cMillies, i));
1052	}
1053
1054	/*
1055	* Discard the highest and lowest results and calculate the average.
1056	*/
1057	unsigned iHigh = 0;
1058	unsigned iLow = 0;
1059	for (i = 1; i < RT_ELEMENTS(au64Samples); i++)
1060	{
1061	if (au64Samples[i] < au64Samples[iLow])
1062	iLow = i;
1063	if (au64Samples[i] > au64Samples[iHigh])
1064	iHigh = i;
1065	}
1066	au64Samples[iLow] = 0;
1067	au64Samples[iHigh] = 0;
1068
1069	u64Hz = au64Samples[0];
1070	for (i = 1; i < RT_ELEMENTS(au64Samples); i++)
1071	u64Hz += au64Samples[i];
1072	u64Hz /= RT_ELEMENTS(au64Samples) - 2;
1073
1074	return u64Hz;
1075	}
1076
1077
1078	/**
1079	* Finalizes the TM initialization.
1080	*
1081	* @returns VBox status code.
1082	* @param pVM The cross context VM structure.
1083	*/
1084	VMM_INT_DECL(int) TMR3InitFinalize(PVM pVM)
1085	{
1086	int rc;
1087
1088	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
1089	/*
1090	* Create a timer for refreshing the CPU load stats.
1091	*/
1092	TMTIMERHANDLE hTimer;
1093	rc = TMR3TimerCreate(pVM, TMCLOCK_REAL, tmR3CpuLoadTimer, NULL, TMTIMER_FLAGS_NO_RING0, "CPU Load Timer", &hTimer);
1094	if (RT_SUCCESS(rc))
1095	rc = TMTimerSetMillies(pVM, hTimer, 1000);
1096	#endif
1097
1098	/*
1099	* GIM is now initialized. Determine if TSC mode switching is allowed (respecting CFGM override).
1100	*/
1101	pVM->tm.s.fTSCModeSwitchAllowed &= tmR3HasFixedTSC(pVM) && GIMIsEnabled(pVM);
1102	LogRel(("TM: TMR3InitFinalize: fTSCModeSwitchAllowed=%RTbool\n", pVM->tm.s.fTSCModeSwitchAllowed));
1103
1104	/*
1105	* Grow the virtual & real timer tables so we've got sufficient
1106	* space for dynamically created timers. We cannot allocate more
1107	* after ring-0 init completes.
1108	*/
1109	static struct { uint32_t idxQueue, cExtra; } s_aExtra[] = { {TMCLOCK_VIRTUAL, 128}, {TMCLOCK_REAL, 32} };
1110	for (uint32_t i = 0; i < RT_ELEMENTS(s_aExtra); i++)
1111	{
1112	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[s_aExtra[i].idxQueue];
1113	PDMCritSectRwEnterExcl(pVM, &pQueue->AllocLock, VERR_IGNORED);
1114	if (s_aExtra[i].cExtra > pQueue->cTimersFree)
1115	{
1116	uint32_t cTimersAlloc = pQueue->cTimersAlloc + s_aExtra[i].cExtra - pQueue->cTimersFree;
1117	rc = tmR3TimerQueueGrow(pVM, pQueue, cTimersAlloc);
1118	AssertLogRelMsgReturn(RT_SUCCESS(rc), ("rc=%Rrc cTimersAlloc=%u %s\n", rc, cTimersAlloc, pQueue->szName), rc);
1119	}
1120	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
1121	}
1122
1123	#ifdef VBOX_WITH_STATISTICS
1124	/*
1125	* Register timer statistics now that we've fixed the timer table sizes.
1126	*/
1127	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
1128	{
1129	pVM->tm.s.aTimerQueues[idxQueue].fCannotGrow = true;
1130	tmR3TimerQueueRegisterStats(pVM, &pVM->tm.s.aTimerQueues[idxQueue], UINT32_MAX);
1131	}
1132	#endif
1133
1134	return rc;
1135	}
1136
1137
1138	/**
1139	* Applies relocations to data and code managed by this
1140	* component. This function will be called at init and
1141	* whenever the VMM need to relocate it self inside the GC.
1142	*
1143	* @param pVM The cross context VM structure.
1144	* @param offDelta Relocation delta relative to old location.
1145	*/
1146	VMM_INT_DECL(void) TMR3Relocate(PVM pVM, RTGCINTPTR offDelta)
1147	{
1148	LogFlow(("TMR3Relocate\n"));
1149	RT_NOREF(pVM, offDelta);
1150	}
1151
1152
1153	/**
1154	* Terminates the TM.
1155	*
1156	* Termination means cleaning up and freeing all resources,
1157	* the VM it self is at this point powered off or suspended.
1158	*
1159	* @returns VBox status code.
1160	* @param pVM The cross context VM structure.
1161	*/
1162	VMM_INT_DECL(int) TMR3Term(PVM pVM)
1163	{
1164	if (pVM->tm.s.pTimer)
1165	{
1166	int rc = RTTimerDestroy(pVM->tm.s.pTimer);
1167	AssertRC(rc);
1168	pVM->tm.s.pTimer = NULL;
1169	}
1170
1171	return VINF_SUCCESS;
1172	}
1173
1174
1175	/**
1176	* The VM is being reset.
1177	*
1178	* For the TM component this means that a rescheduling is preformed,
1179	* the FF is cleared and but without running the queues. We'll have to
1180	* check if this makes sense or not, but it seems like a good idea now....
1181	*
1182	* @param pVM The cross context VM structure.
1183	*/
1184	VMM_INT_DECL(void) TMR3Reset(PVM pVM)
1185	{
1186	LogFlow(("TMR3Reset:\n"));
1187	VM_ASSERT_EMT(pVM);
1188
1189	/*
1190	* Abort any pending catch up.
1191	* This isn't perfect...
1192	*/
1193	if (pVM->tm.s.fVirtualSyncCatchUp)
1194	{
1195	const uint64_t offVirtualNow = TMVirtualGetNoCheck(pVM);
1196	const uint64_t offVirtualSyncNow = TMVirtualSyncGetNoCheck(pVM);
1197	if (pVM->tm.s.fVirtualSyncCatchUp)
1198	{
1199	STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatVirtualSyncCatchup, c);
1200
1201	const uint64_t offOld = pVM->tm.s.offVirtualSyncGivenUp;
1202	const uint64_t offNew = offVirtualNow - offVirtualSyncNow;
1203	Assert(offOld <= offNew);
1204	ASMAtomicWriteU64((uint64_t volatile *)&pVM->tm.s.offVirtualSyncGivenUp, offNew);
1205	ASMAtomicWriteU64((uint64_t volatile *)&pVM->tm.s.offVirtualSync, offNew);
1206	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncCatchUp, false);
1207	LogRel(("TM: Aborting catch-up attempt on reset with a %'RU64 ns lag on reset; new total: %'RU64 ns\n", offNew - offOld, offNew));
1208	}
1209	}
1210
1211	/*
1212	* Process the queues.
1213	*/
1214	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
1215	{
1216	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[idxQueue];
1217	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
1218	tmTimerQueueSchedule(pVM, pQueue, pQueue);
1219	PDMCritSectLeave(pVM, &pQueue->TimerLock);
1220	}
1221	#ifdef VBOX_STRICT
1222	tmTimerQueuesSanityChecks(pVM, "TMR3Reset");
1223	#endif
1224
1225	PVMCPU pVCpuDst = pVM->apCpusR3[pVM->tm.s.idTimerCpu];
1226	VMCPU_FF_CLEAR(pVCpuDst, VMCPU_FF_TIMER); /** @todo FIXME: this isn't right. */
1227
1228	/*
1229	* Switch TM TSC mode back to the original mode after a reset for
1230	* paravirtualized guests that alter the TM TSC mode during operation.
1231	* We're already in an EMT rendezvous at this point.
1232	*/
1233	if ( pVM->tm.s.fTSCModeSwitchAllowed
1234	&& pVM->tm.s.enmTSCMode != pVM->tm.s.enmOriginalTSCMode)
1235	{
1236	VM_ASSERT_EMT0(pVM);
1237	tmR3CpuTickParavirtDisable(pVM, pVM->apCpusR3[0], NULL /* pvData */);
1238	}
1239	Assert(!GIMIsParavirtTscEnabled(pVM));
1240	pVM->tm.s.fParavirtTscEnabled = false;
1241
1242	/*
1243	* Reset TSC to avoid a Windows 8+ bug (see @bugref{8926}). If Windows
1244	* sees TSC value beyond 0x40000000000 at startup, it will reset the
1245	* TSC on boot-up CPU only, causing confusion and mayhem with SMP.
1246	*/
1247	VM_ASSERT_EMT0(pVM);
1248	uint64_t offTscRawSrc;
1249	switch (pVM->tm.s.enmTSCMode)
1250	{
1251	case TMTSCMODE_REAL_TSC_OFFSET:
1252	offTscRawSrc = SUPReadTsc();
1253	break;
1254	case TMTSCMODE_DYNAMIC:
1255	case TMTSCMODE_VIRT_TSC_EMULATED:
1256	offTscRawSrc = TMVirtualSyncGetNoCheck(pVM);
1257	offTscRawSrc = ASMMultU64ByU32DivByU32(offTscRawSrc, pVM->tm.s.cTSCTicksPerSecond, TMCLOCK_FREQ_VIRTUAL);
1258	break;
1259	case TMTSCMODE_NATIVE_API:
1260	/** @todo NEM TSC reset on reset for Windows8+ bug workaround. */
1261	offTscRawSrc = 0;
1262	break;
1263	default:
1264	AssertFailedBreakStmt(offTscRawSrc = 0);
1265	}
1266	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
1267	{
1268	PVMCPU pVCpu = pVM->apCpusR3[idCpu];
1269	pVCpu->tm.s.offTSCRawSrc = offTscRawSrc;
1270	pVCpu->tm.s.u64TSC = 0;
1271	pVCpu->tm.s.u64TSCLastSeen = 0;
1272	#if defined(VBOX_VMM_TARGET_ARMV8)
1273	pVCpu->cNsVTimerActivate = UINT64_MAX;
1274	#endif
1275	}
1276	}
1277
1278
1279	/**
1280	* Execute state save operation.
1281	*
1282	* @returns VBox status code.
1283	* @param pVM The cross context VM structure.
1284	* @param pSSM SSM operation handle.
1285	*/
1286	static DECLCALLBACK(int) tmR3Save(PVM pVM, PSSMHANDLE pSSM)
1287	{
1288	LogFlow(("tmR3Save:\n"));
1289	#ifdef VBOX_STRICT
1290	for (VMCPUID i = 0; i < pVM->cCpus; i++)
1291	{
1292	PVMCPU pVCpu = pVM->apCpusR3[i];
1293	Assert(!pVCpu->tm.s.fTSCTicking);
1294	}
1295	Assert(!pVM->tm.s.cVirtualTicking);
1296	Assert(!pVM->tm.s.fVirtualSyncTicking);
1297	Assert(!pVM->tm.s.cTSCsTicking);
1298	#endif
1299
1300	/*
1301	* Save the virtual clocks.
1302	*/
1303	/* the virtual clock. */
1304	SSMR3PutU64(pSSM, TMCLOCK_FREQ_VIRTUAL);
1305	SSMR3PutU64(pSSM, pVM->tm.s.u64Virtual);
1306
1307	/* the virtual timer synchronous clock. */
1308	SSMR3PutU64(pSSM, pVM->tm.s.u64VirtualSync);
1309	SSMR3PutU64(pSSM, pVM->tm.s.offVirtualSync);
1310	SSMR3PutU64(pSSM, pVM->tm.s.offVirtualSyncGivenUp);
1311	SSMR3PutU64(pSSM, pVM->tm.s.u64VirtualSyncCatchUpPrev);
1312	SSMR3PutBool(pSSM, pVM->tm.s.fVirtualSyncCatchUp);
1313
1314	/* real time clock */
1315	SSMR3PutU64(pSSM, TMCLOCK_FREQ_REAL);
1316
1317	/* the cpu tick clock. */
1318	for (VMCPUID i = 0; i < pVM->cCpus; i++)
1319	{
1320	PVMCPU pVCpu = pVM->apCpusR3[i];
1321	SSMR3PutU64(pSSM, TMCpuTickGet(pVCpu));
1322	}
1323	return SSMR3PutU64(pSSM, pVM->tm.s.cTSCTicksPerSecond);
1324	}
1325
1326
1327	/**
1328	* Execute state load operation.
1329	*
1330	* @returns VBox status code.
1331	* @param pVM The cross context VM structure.
1332	* @param pSSM SSM operation handle.
1333	* @param uVersion Data layout version.
1334	* @param uPass The data pass.
1335	*/
1336	static DECLCALLBACK(int) tmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
1337	{
1338	LogFlow(("tmR3Load:\n"));
1339
1340	Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
1341	#ifdef VBOX_STRICT
1342	for (VMCPUID i = 0; i < pVM->cCpus; i++)
1343	{
1344	PVMCPU pVCpu = pVM->apCpusR3[i];
1345	Assert(!pVCpu->tm.s.fTSCTicking);
1346	}
1347	Assert(!pVM->tm.s.cVirtualTicking);
1348	Assert(!pVM->tm.s.fVirtualSyncTicking);
1349	Assert(!pVM->tm.s.cTSCsTicking);
1350	#endif
1351
1352	/*
1353	* Validate version.
1354	*/
1355	if (uVersion != TM_SAVED_STATE_VERSION)
1356	{
1357	AssertMsgFailed(("tmR3Load: Invalid version uVersion=%d!\n", uVersion));
1358	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
1359	}
1360
1361	/*
1362	* Load the virtual clock.
1363	*/
1364	pVM->tm.s.cVirtualTicking = 0;
1365	/* the virtual clock. */
1366	uint64_t u64Hz;
1367	int rc = SSMR3GetU64(pSSM, &u64Hz);
1368	if (RT_FAILURE(rc))
1369	return rc;
1370	if (u64Hz != TMCLOCK_FREQ_VIRTUAL)
1371	{
1372	AssertMsgFailed(("The virtual clock frequency differs! Saved: %'RU64 Binary: %'RU64\n",
1373	u64Hz, TMCLOCK_FREQ_VIRTUAL));
1374	return VERR_SSM_VIRTUAL_CLOCK_HZ;
1375	}
1376	SSMR3GetU64(pSSM, &pVM->tm.s.u64Virtual);
1377	pVM->tm.s.u64VirtualOffset = 0;
1378
1379	/* the virtual timer synchronous clock. */
1380	pVM->tm.s.fVirtualSyncTicking = false;
1381	uint64_t u64;
1382	SSMR3GetU64(pSSM, &u64);
1383	pVM->tm.s.u64VirtualSync = u64;
1384	SSMR3GetU64(pSSM, &u64);
1385	pVM->tm.s.offVirtualSync = u64;
1386	SSMR3GetU64(pSSM, &u64);
1387	pVM->tm.s.offVirtualSyncGivenUp = u64;
1388	SSMR3GetU64(pSSM, &u64);
1389	pVM->tm.s.u64VirtualSyncCatchUpPrev = u64;
1390	bool f;
1391	SSMR3GetBool(pSSM, &f);
1392	pVM->tm.s.fVirtualSyncCatchUp = f;
1393
1394	/* the real clock */
1395	rc = SSMR3GetU64(pSSM, &u64Hz);
1396	if (RT_FAILURE(rc))
1397	return rc;
1398	if (u64Hz != TMCLOCK_FREQ_REAL)
1399	{
1400	AssertMsgFailed(("The real clock frequency differs! Saved: %'RU64 Binary: %'RU64\n",
1401	u64Hz, TMCLOCK_FREQ_REAL));
1402	return VERR_SSM_VIRTUAL_CLOCK_HZ; /* misleading... */
1403	}
1404
1405	/* the cpu tick clock. */
1406	pVM->tm.s.cTSCsTicking = 0;
1407	pVM->tm.s.offTSCPause = 0;
1408	pVM->tm.s.u64LastPausedTSC = 0;
1409	for (VMCPUID i = 0; i < pVM->cCpus; i++)
1410	{
1411	PVMCPU pVCpu = pVM->apCpusR3[i];
1412
1413	pVCpu->tm.s.fTSCTicking = false;
1414	SSMR3GetU64(pSSM, &pVCpu->tm.s.u64TSC);
1415	if (pVM->tm.s.u64LastPausedTSC < pVCpu->tm.s.u64TSC)
1416	pVM->tm.s.u64LastPausedTSC = pVCpu->tm.s.u64TSC;
1417
1418	if (pVM->tm.s.enmTSCMode == TMTSCMODE_REAL_TSC_OFFSET)
1419	pVCpu->tm.s.offTSCRawSrc = 0; /** @todo TSC restore stuff and HWACC. */
1420	}
1421
1422	rc = SSMR3GetU64(pSSM, &u64Hz);
1423	if (RT_FAILURE(rc))
1424	return rc;
1425	if (pVM->tm.s.enmTSCMode != TMTSCMODE_REAL_TSC_OFFSET)
1426	pVM->tm.s.cTSCTicksPerSecond = u64Hz;
1427
1428	LogRel(("TM: cTSCTicksPerSecond=%#RX64 (%'RU64) enmTSCMode=%d (%s) (state load)\n",
1429	pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.enmTSCMode, tmR3GetTSCModeName(pVM)));
1430
1431	/* Disabled as this isn't tested, also should this apply only if GIM is enabled etc. */
1432	#if 0
1433	/*
1434	* If the current host TSC frequency is incompatible with what is in the
1435	* saved state of the VM, fall back to emulating TSC and disallow TSC mode
1436	* switches during VM runtime (e.g. by GIM).
1437	*/
1438	if ( GIMIsEnabled(pVM)
1439	\|\| pVM->tm.s.enmTSCMode == TMTSCMODE_REAL_TSC_OFFSET)
1440	{
1441	uint64_t uGipCpuHz;
1442	bool fRelax = RTSystemIsInsideVM();
1443	bool fCompat = SUPIsTscFreqCompatible(pVM->tm.s.cTSCTicksPerSecond, &uGipCpuHz, fRelax);
1444	if (!fCompat)
1445	{
1446	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
1447	pVM->tm.s.fTSCModeSwitchAllowed = false;
1448	if (g_pSUPGlobalInfoPage->u32Mode != SUPGIPMODE_ASYNC_TSC)
1449	{
1450	LogRel(("TM: TSC frequency incompatible! uGipCpuHz=%#RX64 (%'RU64) enmTSCMode=%d (%s) fTSCModeSwitchAllowed=%RTbool (state load)\n",
1451	uGipCpuHz, uGipCpuHz, pVM->tm.s.enmTSCMode, tmR3GetTSCModeName(pVM), pVM->tm.s.fTSCModeSwitchAllowed));
1452	}
1453	else
1454	{
1455	LogRel(("TM: GIP is async, enmTSCMode=%d (%s) fTSCModeSwitchAllowed=%RTbool (state load)\n",
1456	uGipCpuHz, uGipCpuHz, pVM->tm.s.enmTSCMode, tmR3GetTSCModeName(pVM), pVM->tm.s.fTSCModeSwitchAllowed));
1457	}
1458	}
1459	}
1460	#endif
1461
1462	/*
1463	* Make sure timers get rescheduled immediately.
1464	*/
1465	PVMCPU pVCpuDst = pVM->apCpusR3[pVM->tm.s.idTimerCpu];
1466	VMCPU_FF_SET(pVCpuDst, VMCPU_FF_TIMER);
1467
1468	return VINF_SUCCESS;
1469	}
1470
1471	#ifdef VBOX_WITH_STATISTICS
1472
1473	/**
1474	* Register statistics for a timer.
1475	*
1476	* @param pVM The cross context VM structure.
1477	* @param pQueue The queue the timer belongs to.
1478	* @param pTimer The timer to register statistics for.
1479	*/
1480	static void tmR3TimerRegisterStats(PVM pVM, PTMTIMERQUEUE pQueue, PTMTIMER pTimer)
1481	{
1482	STAMR3RegisterF(pVM, &pTimer->StatTimer, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS_PER_CALL,
1483	pQueue->szName, "/TM/Timers/%s", pTimer->szName);
1484	STAMR3RegisterF(pVM, &pTimer->StatCritSectEnter, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS_PER_CALL,
1485	"", "/TM/Timers/%s/CritSectEnter", pTimer->szName);
1486	STAMR3RegisterF(pVM, &pTimer->StatGet, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS,
1487	"", "/TM/Timers/%s/Get", pTimer->szName);
1488	STAMR3RegisterF(pVM, &pTimer->StatSetAbsolute, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS,
1489	"", "/TM/Timers/%s/SetAbsolute", pTimer->szName);
1490	STAMR3RegisterF(pVM, &pTimer->StatSetRelative, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS,
1491	"", "/TM/Timers/%s/SetRelative", pTimer->szName);
1492	STAMR3RegisterF(pVM, &pTimer->StatStop, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS,
1493	"", "/TM/Timers/%s/Stop", pTimer->szName);
1494	}
1495
1496
1497	/**
1498	* Deregister the statistics for a timer.
1499	*/
1500	static void tmR3TimerDeregisterStats(PVM pVM, PTMTIMER pTimer)
1501	{
1502	char szPrefix[128];
1503	size_t cchPrefix = RTStrPrintf(szPrefix, sizeof(szPrefix), "/TM/Timers/%s/", pTimer->szName);
1504	STAMR3DeregisterByPrefix(pVM->pUVM, szPrefix);
1505	szPrefix[cchPrefix - 1] = '\0';
1506	STAMR3Deregister(pVM->pUVM, szPrefix);
1507	}
1508
1509
1510	/**
1511	* Register statistics for all allocated timers in a queue.
1512	*
1513	* @param pVM The cross context VM structure.
1514	* @param pQueue The queue to register statistics for.
1515	* @param cTimers Number of timers to consider (in growth scenario).
1516	*/
1517	static void tmR3TimerQueueRegisterStats(PVM pVM, PTMTIMERQUEUE pQueue, uint32_t cTimers)
1518	{
1519	uint32_t idxTimer = RT_MIN(cTimers, pQueue->cTimersAlloc);
1520	while (idxTimer-- > 0)
1521	{
1522	PTMTIMER pTimer = &pQueue->paTimers[idxTimer];
1523	TMTIMERSTATE enmState = pTimer->enmState;
1524	if (enmState > TMTIMERSTATE_INVALID && enmState < TMTIMERSTATE_DESTROY)
1525	tmR3TimerRegisterStats(pVM, pQueue, pTimer);
1526	}
1527	}
1528
1529	#endif /* VBOX_WITH_STATISTICS */
1530
1531
1532	/**
1533	* Grows a timer queue.
1534	*
1535	* @returns VBox status code (errors are LogRel'ed already).
1536	* @param pVM The cross context VM structure.
1537	* @param pQueue The timer queue to grow.
1538	* @param cNewTimers The minimum number of timers after growing.
1539	* @note Caller owns the queue's allocation lock.
1540	*/
1541	static int tmR3TimerQueueGrow(PVM pVM, PTMTIMERQUEUE pQueue, uint32_t cNewTimers)
1542	{
1543	/*
1544	* Validate input and state.
1545	*/
1546	VM_ASSERT_EMT0_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
1547	VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_VM_INVALID_VM_STATE); /** @todo must do better than this! */
1548	AssertReturn(!pQueue->fCannotGrow, VERR_TM_TIMER_QUEUE_CANNOT_GROW);
1549
1550	uint32_t const cOldEntries = pQueue->cTimersAlloc;
1551	AssertReturn(cNewTimers > cOldEntries, VERR_TM_IPE_1);
1552	AssertReturn(cNewTimers < _32K, VERR_TM_IPE_1);
1553
1554	/*
1555	* Do the growing.
1556	*/
1557	int rc;
1558	if (!SUPR3IsDriverless())
1559	{
1560	rc = VMMR3CallR0Emt(pVM, VMMGetCpu(pVM), VMMR0_DO_TM_GROW_TIMER_QUEUE,
1561	RT_MAKE_U64(cNewTimers, (uint64_t)(pQueue - &pVM->tm.s.aTimerQueues[0])), NULL);
1562	AssertLogRelRCReturn(rc, rc);
1563	AssertReturn(pQueue->cTimersAlloc >= cNewTimers, VERR_TM_IPE_3);
1564	}
1565	else
1566	{
1567	AssertReturn(cNewTimers <= _32K && cOldEntries <= _32K, VERR_TM_TOO_MANY_TIMERS);
1568	ASMCompilerBarrier();
1569
1570	/*
1571	* Round up the request to the nearest page and do the allocation.
1572	*/
1573	size_t cbNew = sizeof(TMTIMER) * cNewTimers;
1574	cbNew = RT_ALIGN_Z(cbNew, HOST_PAGE_SIZE);
1575	cNewTimers = (uint32_t)(cbNew / sizeof(TMTIMER));
1576
1577	PTMTIMER paTimers = (PTMTIMER)RTMemPageAllocZ(cbNew);
1578	if (paTimers)
1579	{
1580	/*
1581	* Copy over the old timer, init the new free ones, then switch over
1582	* and free the old ones.
1583	*/
1584	PTMTIMER const paOldTimers = pQueue->paTimers;
1585	tmHCTimerQueueGrowInit(paTimers, paOldTimers, cNewTimers, cOldEntries);
1586
1587	pQueue->paTimers = paTimers;
1588	pQueue->cTimersAlloc = cNewTimers;
1589	pQueue->cTimersFree += cNewTimers - (cOldEntries ? cOldEntries : 1);
1590
1591	RTMemPageFree(paOldTimers, RT_ALIGN_Z(sizeof(TMTIMER) * cOldEntries, HOST_PAGE_SIZE));
1592	rc = VINF_SUCCESS;
1593	}
1594	else
1595	rc = VERR_NO_PAGE_MEMORY;
1596	}
1597	return rc;
1598	}
1599
1600
1601	/**
1602	* Internal TMR3TimerCreate worker.
1603	*
1604	* @returns VBox status code.
1605	* @param pVM The cross context VM structure.
1606	* @param enmClock The timer clock.
1607	* @param fFlags TMTIMER_FLAGS_XXX.
1608	* @param pszName The timer name.
1609	* @param ppTimer Where to store the timer pointer on success.
1610	*/
1611	static int tmr3TimerCreate(PVM pVM, TMCLOCK enmClock, uint32_t fFlags, const char *pszName, PPTMTIMERR3 ppTimer)
1612	{
1613	PTMTIMER pTimer;
1614
1615	/*
1616	* Validate input.
1617	*/
1618	VM_ASSERT_EMT(pVM);
1619
1620	AssertReturn((fFlags & (TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0)) != (TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0),
1621	VERR_INVALID_FLAGS);
1622
1623	AssertPtrReturn(pszName, VERR_INVALID_POINTER);
1624	size_t const cchName = strlen(pszName);
1625	AssertMsgReturn(cchName < sizeof(pTimer->szName), ("timer name too long: %s\n", pszName), VERR_INVALID_NAME);
1626	AssertMsgReturn(cchName > 2, ("Too short timer name: %s\n", pszName), VERR_INVALID_NAME);
1627
1628	AssertMsgReturn(enmClock >= TMCLOCK_REAL && enmClock < TMCLOCK_MAX,
1629	("%d\n", enmClock), VERR_INVALID_PARAMETER);
1630	AssertReturn(enmClock != TMCLOCK_TSC, VERR_NOT_SUPPORTED);
1631	if (enmClock == TMCLOCK_VIRTUAL_SYNC)
1632	VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_WRONG_ORDER);
1633
1634	/*
1635	* Exclusively lock the queue.
1636	*
1637	* Note! This means that it is not possible to allocate timers from a timer callback.
1638	*/
1639	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[enmClock];
1640	int rc = PDMCritSectRwEnterExcl(pVM, &pQueue->AllocLock, VERR_IGNORED);
1641	AssertRCReturn(rc, rc);
1642
1643	/*
1644	* Allocate the timer.
1645	*/
1646	if (!pQueue->cTimersFree)
1647	{
1648	rc = tmR3TimerQueueGrow(pVM, pQueue, pQueue->cTimersAlloc + 64);
1649	AssertRCReturnStmt(rc, PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock), rc);
1650	}
1651
1652	/* Scan the array for free timers. */
1653	pTimer = NULL;
1654	PTMTIMER const paTimers = pQueue->paTimers;
1655	uint32_t const cTimersAlloc = pQueue->cTimersAlloc;
1656	uint32_t idxTimer = pQueue->idxFreeHint;
1657	for (uint32_t iScan = 0; iScan < 2; iScan++)
1658	{
1659	while (idxTimer < cTimersAlloc)
1660	{
1661	if (paTimers[idxTimer].enmState == TMTIMERSTATE_FREE)
1662	{
1663	pTimer = &paTimers[idxTimer];
1664	pQueue->idxFreeHint = idxTimer + 1;
1665	break;
1666	}
1667	idxTimer++;
1668	}
1669	if (pTimer != NULL)
1670	break;
1671	idxTimer = 1;
1672	}
1673	AssertLogRelMsgReturnStmt(pTimer != NULL, ("cTimersFree=%u cTimersAlloc=%u enmClock=%s\n", pQueue->cTimersFree,
1674	pQueue->cTimersAlloc, pQueue->szName),
1675	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock), VERR_INTERNAL_ERROR_3);
1676	pQueue->cTimersFree -= 1;
1677
1678	/*
1679	* Initialize it.
1680	*/
1681	Assert(idxTimer != 0);
1682	Assert(idxTimer <= TMTIMERHANDLE_TIMER_IDX_MASK);
1683	pTimer->hSelf = idxTimer
1684	\| ((uintptr_t)(pQueue - &pVM->tm.s.aTimerQueues[0]) << TMTIMERHANDLE_QUEUE_IDX_SHIFT);
1685	Assert(!(pTimer->hSelf & TMTIMERHANDLE_RANDOM_MASK));
1686	pTimer->hSelf \|= (RTRandU64() & TMTIMERHANDLE_RANDOM_MASK);
1687
1688	pTimer->u64Expire = 0;
1689	pTimer->enmState = TMTIMERSTATE_STOPPED;
1690	pTimer->idxScheduleNext = UINT32_MAX;
1691	pTimer->idxNext = UINT32_MAX;
1692	pTimer->idxPrev = UINT32_MAX;
1693	pTimer->fFlags = fFlags;
1694	pTimer->uHzHint = 0;
1695	pTimer->pvUser = NULL;
1696	pTimer->pCritSect = NULL;
1697	memcpy(pTimer->szName, pszName, cchName);
1698	pTimer->szName[cchName] = '\0';
1699
1700	#ifdef VBOX_STRICT
1701	tmTimerQueuesSanityChecks(pVM, "tmR3TimerCreate");
1702	#endif
1703
1704	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
1705
1706	#ifdef VBOX_WITH_STATISTICS
1707	/*
1708	* Only register statistics if we're passed the no-realloc point.
1709	*/
1710	if (pQueue->fCannotGrow)
1711	tmR3TimerRegisterStats(pVM, pQueue, pTimer);
1712	#endif
1713
1714	*ppTimer = pTimer;
1715	return VINF_SUCCESS;
1716	}
1717
1718
1719	/**
1720	* Creates a device timer.
1721	*
1722	* @returns VBox status code.
1723	* @param pVM The cross context VM structure.
1724	* @param pDevIns Device instance.
1725	* @param enmClock The clock to use on this timer.
1726	* @param pfnCallback Callback function.
1727	* @param pvUser The user argument to the callback.
1728	* @param fFlags Timer creation flags, see grp_tm_timer_flags.
1729	* @param pszName Timer name (will be copied). Max 31 chars.
1730	* @param phTimer Where to store the timer handle on success.
1731	*/
1732	VMM_INT_DECL(int) TMR3TimerCreateDevice(PVM pVM, PPDMDEVINS pDevIns, TMCLOCK enmClock,
1733	PFNTMTIMERDEV pfnCallback, void *pvUser,
1734	uint32_t fFlags, const char *pszName, PTMTIMERHANDLE phTimer)
1735	{
1736	AssertReturn(!(fFlags & ~(TMTIMER_FLAGS_NO_CRIT_SECT \| TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0)),
1737	VERR_INVALID_FLAGS);
1738
1739	/*
1740	* Allocate and init stuff.
1741	*/
1742	PTMTIMER pTimer;
1743	int rc = tmr3TimerCreate(pVM, enmClock, fFlags, pszName, &pTimer);
1744	if (RT_SUCCESS(rc))
1745	{
1746	pTimer->enmType = TMTIMERTYPE_DEV;
1747	pTimer->u.Dev.pfnTimer = pfnCallback;
1748	pTimer->u.Dev.pDevIns = pDevIns;
1749	pTimer->pvUser = pvUser;
1750	if (!(fFlags & TMTIMER_FLAGS_NO_CRIT_SECT))
1751	pTimer->pCritSect = PDMR3DevGetCritSect(pVM, pDevIns);
1752	*phTimer = pTimer->hSelf;
1753	Log(("TM: Created device timer %p clock %d callback %p '%s'\n", phTimer, enmClock, pfnCallback, pszName));
1754	}
1755
1756	return rc;
1757	}
1758
1759
1760
1761
1762	/**
1763	* Creates a USB device timer.
1764	*
1765	* @returns VBox status code.
1766	* @param pVM The cross context VM structure.
1767	* @param pUsbIns The USB device instance.
1768	* @param enmClock The clock to use on this timer.
1769	* @param pfnCallback Callback function.
1770	* @param pvUser The user argument to the callback.
1771	* @param fFlags Timer creation flags, see grp_tm_timer_flags.
1772	* @param pszName Timer name (will be copied). Max 31 chars.
1773	* @param phTimer Where to store the timer handle on success.
1774	*/
1775	VMM_INT_DECL(int) TMR3TimerCreateUsb(PVM pVM, PPDMUSBINS pUsbIns, TMCLOCK enmClock,
1776	PFNTMTIMERUSB pfnCallback, void *pvUser,
1777	uint32_t fFlags, const char *pszName, PTMTIMERHANDLE phTimer)
1778	{
1779	AssertReturn(!(fFlags & ~(TMTIMER_FLAGS_NO_CRIT_SECT \| TMTIMER_FLAGS_NO_RING0)), VERR_INVALID_PARAMETER);
1780
1781	/*
1782	* Allocate and init stuff.
1783	*/
1784	PTMTIMER pTimer;
1785	int rc = tmr3TimerCreate(pVM, enmClock, fFlags, pszName, &pTimer);
1786	if (RT_SUCCESS(rc))
1787	{
1788	pTimer->enmType = TMTIMERTYPE_USB;
1789	pTimer->u.Usb.pfnTimer = pfnCallback;
1790	pTimer->u.Usb.pUsbIns = pUsbIns;
1791	pTimer->pvUser = pvUser;
1792	//if (!(fFlags & TMTIMER_FLAGS_NO_CRIT_SECT))
1793	//{
1794	// if (pDevIns->pCritSectR3)
1795	// pTimer->pCritSect = pUsbIns->pCritSectR3;
1796	// else
1797	// pTimer->pCritSect = IOMR3GetCritSect(pVM);
1798	//}
1799	*phTimer = pTimer->hSelf;
1800	Log(("TM: Created USB device timer %p clock %d callback %p '%s'\n", *phTimer, enmClock, pfnCallback, pszName));
1801	}
1802
1803	return rc;
1804	}
1805
1806
1807	/**
1808	* Creates a driver timer.
1809	*
1810	* @returns VBox status code.
1811	* @param pVM The cross context VM structure.
1812	* @param pDrvIns Driver instance.
1813	* @param enmClock The clock to use on this timer.
1814	* @param pfnCallback Callback function.
1815	* @param pvUser The user argument to the callback.
1816	* @param fFlags Timer creation flags, see grp_tm_timer_flags.
1817	* @param pszName Timer name (will be copied). Max 31 chars.
1818	* @param phTimer Where to store the timer handle on success.
1819	*/
1820	VMM_INT_DECL(int) TMR3TimerCreateDriver(PVM pVM, PPDMDRVINS pDrvIns, TMCLOCK enmClock, PFNTMTIMERDRV pfnCallback, void *pvUser,
1821	uint32_t fFlags, const char *pszName, PTMTIMERHANDLE phTimer)
1822	{
1823	AssertReturn(!(fFlags & ~(TMTIMER_FLAGS_NO_CRIT_SECT \| TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0)),
1824	VERR_INVALID_FLAGS);
1825
1826	/*
1827	* Allocate and init stuff.
1828	*/
1829	PTMTIMER pTimer;
1830	int rc = tmr3TimerCreate(pVM, enmClock, fFlags, pszName, &pTimer);
1831	if (RT_SUCCESS(rc))
1832	{
1833	pTimer->enmType = TMTIMERTYPE_DRV;
1834	pTimer->u.Drv.pfnTimer = pfnCallback;
1835	pTimer->u.Drv.pDrvIns = pDrvIns;
1836	pTimer->pvUser = pvUser;
1837	*phTimer = pTimer->hSelf;
1838	Log(("TM: Created device timer %p clock %d callback %p '%s'\n", *phTimer, enmClock, pfnCallback, pszName));
1839	}
1840
1841	return rc;
1842	}
1843
1844
1845	/**
1846	* Creates an internal timer.
1847	*
1848	* @returns VBox status code.
1849	* @param pVM The cross context VM structure.
1850	* @param enmClock The clock to use on this timer.
1851	* @param pfnCallback Callback function.
1852	* @param pvUser User argument to be passed to the callback.
1853	* @param fFlags Timer creation flags, see grp_tm_timer_flags.
1854	* @param pszName Timer name (will be copied). Max 31 chars.
1855	* @param phTimer Where to store the timer handle on success.
1856	*/
1857	VMMR3DECL(int) TMR3TimerCreate(PVM pVM, TMCLOCK enmClock, PFNTMTIMERINT pfnCallback, void *pvUser,
1858	uint32_t fFlags, const char *pszName, PTMTIMERHANDLE phTimer)
1859	{
1860	AssertReturn(fFlags & (TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0), VERR_INVALID_FLAGS);
1861	AssertReturn((fFlags & (TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0)) != (TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0),
1862	VERR_INVALID_FLAGS);
1863
1864	/*
1865	* Allocate and init stuff.
1866	*/
1867	PTMTIMER pTimer;
1868	int rc = tmr3TimerCreate(pVM, enmClock, fFlags, pszName, &pTimer);
1869	if (RT_SUCCESS(rc))
1870	{
1871	pTimer->enmType = TMTIMERTYPE_INTERNAL;
1872	pTimer->u.Internal.pfnTimer = pfnCallback;
1873	pTimer->pvUser = pvUser;
1874	*phTimer = pTimer->hSelf;
1875	Log(("TM: Created internal timer %p clock %d callback %p '%s'\n", pTimer, enmClock, pfnCallback, pszName));
1876	}
1877
1878	return rc;
1879	}
1880
1881
1882	/**
1883	* Destroy a timer
1884	*
1885	* @returns VBox status code.
1886	* @param pVM The cross context VM structure.
1887	* @param pQueue The queue the timer is on.
1888	* @param pTimer Timer handle as returned by one of the create functions.
1889	*/
1890	static int tmR3TimerDestroy(PVMCC pVM, PTMTIMERQUEUE pQueue, PTMTIMER pTimer)
1891	{
1892	bool fActive = false;
1893	bool fPending = false;
1894
1895	AssertMsg( !pTimer->pCritSect
1896	\|\| VMR3GetState(pVM) != VMSTATE_RUNNING
1897	\|\| PDMCritSectIsOwner(pVM, pTimer->pCritSect), ("%s\n", pTimer->szName));
1898
1899	/*
1900	* The rest of the game happens behind the lock, just
1901	* like create does. All the work is done here.
1902	*/
1903	PDMCritSectRwEnterExcl(pVM, &pQueue->AllocLock, VERR_IGNORED);
1904	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
1905
1906	for (int cRetries = 1000;; cRetries--)
1907	{
1908	/*
1909	* Change to the DESTROY state.
1910	*/
1911	TMTIMERSTATE const enmState = pTimer->enmState;
1912	Log2(("TMTimerDestroy: %p:{.enmState=%s, .szName='%s'} cRetries=%d\n",
1913	pTimer, tmTimerState(enmState), pTimer->szName, cRetries));
1914	switch (enmState)
1915	{
1916	case TMTIMERSTATE_STOPPED:
1917	case TMTIMERSTATE_EXPIRED_DELIVER:
1918	break;
1919
1920	case TMTIMERSTATE_ACTIVE:
1921	fActive = true;
1922	break;
1923
1924	case TMTIMERSTATE_PENDING_STOP:
1925	case TMTIMERSTATE_PENDING_STOP_SCHEDULE:
1926	case TMTIMERSTATE_PENDING_RESCHEDULE:
1927	fActive = true;
1928	fPending = true;
1929	break;
1930
1931	case TMTIMERSTATE_PENDING_SCHEDULE:
1932	fPending = true;
1933	break;
1934
1935	/*
1936	* This shouldn't happen as the caller should make sure there are no races.
1937	*/
1938	case TMTIMERSTATE_EXPIRED_GET_UNLINK:
1939	case TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE:
1940	case TMTIMERSTATE_PENDING_RESCHEDULE_SET_EXPIRE:
1941	AssertMsgFailed(("%p:.enmState=%s %s\n", pTimer, tmTimerState(enmState), pTimer->szName));
1942	PDMCritSectLeave(pVM, &pQueue->TimerLock);
1943	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
1944
1945	AssertMsgReturn(cRetries > 0, ("Failed waiting for stable state. state=%d (%s)\n", pTimer->enmState, pTimer->szName),
1946	VERR_TM_UNSTABLE_STATE);
1947	if (!RTThreadYield())
1948	RTThreadSleep(1);
1949
1950	PDMCritSectRwEnterExcl(pVM, &pQueue->AllocLock, VERR_IGNORED);
1951	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
1952	continue;
1953
1954	/*
1955	* Invalid states.
1956	*/
1957	case TMTIMERSTATE_FREE:
1958	case TMTIMERSTATE_DESTROY:
1959	PDMCritSectLeave(pVM, &pQueue->TimerLock);
1960	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
1961	AssertLogRelMsgFailedReturn(("pTimer=%p %s\n", pTimer, tmTimerState(enmState)), VERR_TM_INVALID_STATE);
1962
1963	default:
1964	AssertMsgFailed(("Unknown timer state %d (%s)\n", enmState, pTimer->szName));
1965	PDMCritSectLeave(pVM, &pQueue->TimerLock);
1966	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
1967	return VERR_TM_UNKNOWN_STATE;
1968	}
1969
1970	/*
1971	* Try switch to the destroy state.
1972	* This should always succeed as the caller should make sure there are no race.
1973	*/
1974	bool fRc;
1975	TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_DESTROY, enmState, fRc);
1976	if (fRc)
1977	break;
1978	AssertMsgFailed(("%p:.enmState=%s %s\n", pTimer, tmTimerState(enmState), pTimer->szName));
1979	PDMCritSectLeave(pVM, &pQueue->TimerLock);
1980	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
1981
1982	AssertMsgReturn(cRetries > 0, ("Failed waiting for stable state. state=%d (%s)\n", pTimer->enmState, pTimer->szName),
1983	VERR_TM_UNSTABLE_STATE);
1984
1985	PDMCritSectRwEnterExcl(pVM, &pQueue->AllocLock, VERR_IGNORED);
1986	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
1987	}
1988
1989	/*
1990	* Unlink from the active list.
1991	*/
1992	if (fActive)
1993	{
1994	const PTMTIMER pPrev = tmTimerGetPrev(pQueue, pTimer);
1995	const PTMTIMER pNext = tmTimerGetNext(pQueue, pTimer);
1996	if (pPrev)
1997	tmTimerSetNext(pQueue, pPrev, pNext);
1998	else
1999	{
2000	tmTimerQueueSetHead(pQueue, pQueue, pNext);
2001	pQueue->u64Expire = pNext ? pNext->u64Expire : INT64_MAX;
2002	}
2003	if (pNext)
2004	tmTimerSetPrev(pQueue, pNext, pPrev);
2005	pTimer->idxNext = UINT32_MAX;
2006	pTimer->idxPrev = UINT32_MAX;
2007	}
2008
2009	/*
2010	* Unlink from the schedule list by running it.
2011	*/
2012	if (fPending)
2013	{
2014	Log3(("TMR3TimerDestroy: tmTimerQueueSchedule\n"));
2015	STAM_PROFILE_START(&pVM->tm.s.CTX_SUFF_Z(StatScheduleOne), a);
2016	Assert(pQueue->idxSchedule < pQueue->cTimersAlloc);
2017	tmTimerQueueSchedule(pVM, pQueue, pQueue);
2018	STAM_PROFILE_STOP(&pVM->tm.s.CTX_SUFF_Z(StatScheduleOne), a);
2019	}
2020
2021	#ifdef VBOX_WITH_STATISTICS
2022	/*
2023	* Deregister statistics.
2024	*/
2025	tmR3TimerDeregisterStats(pVM, pTimer);
2026	#endif
2027
2028	/*
2029	* Change it to free state and update the queue accordingly.
2030	*/
2031	Assert(pTimer->idxNext == UINT32_MAX); Assert(pTimer->idxPrev == UINT32_MAX); Assert(pTimer->idxScheduleNext == UINT32_MAX);
2032
2033	TM_SET_STATE(pTimer, TMTIMERSTATE_FREE);
2034
2035	pQueue->cTimersFree += 1;
2036	uint32_t idxTimer = (uint32_t)(pTimer - pQueue->paTimers);
2037	if (idxTimer < pQueue->idxFreeHint)
2038	pQueue->idxFreeHint = idxTimer;
2039
2040	#ifdef VBOX_STRICT
2041	tmTimerQueuesSanityChecks(pVM, "TMR3TimerDestroy");
2042	#endif
2043	PDMCritSectLeave(pVM, &pQueue->TimerLock);
2044	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
2045	return VINF_SUCCESS;
2046	}
2047
2048
2049	/**
2050	* Destroy a timer
2051	*
2052	* @returns VBox status code.
2053	* @param pVM The cross context VM structure.
2054	* @param hTimer Timer handle as returned by one of the create functions.
2055	*/
2056	VMMR3DECL(int) TMR3TimerDestroy(PVM pVM, TMTIMERHANDLE hTimer)
2057	{
2058	/* We ignore NILs here. */
2059	if (hTimer == NIL_TMTIMERHANDLE)
2060	return VINF_SUCCESS;
2061	TMTIMER_HANDLE_TO_VARS_RETURN(pVM, hTimer); /* => pTimer, pQueueCC, pQueue, idxTimer, idxQueue */
2062	return tmR3TimerDestroy(pVM, pQueue, pTimer);
2063	}
2064
2065
2066	/**
2067	* Destroy all timers owned by a device.
2068	*
2069	* @returns VBox status code.
2070	* @param pVM The cross context VM structure.
2071	* @param pDevIns Device which timers should be destroyed.
2072	*/
2073	VMM_INT_DECL(int) TMR3TimerDestroyDevice(PVM pVM, PPDMDEVINS pDevIns)
2074	{
2075	LogFlow(("TMR3TimerDestroyDevice: pDevIns=%p\n", pDevIns));
2076	if (!pDevIns)
2077	return VERR_INVALID_PARAMETER;
2078
2079	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
2080	{
2081	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[idxQueue];
2082	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2083	uint32_t idxTimer = pQueue->cTimersAlloc;
2084	while (idxTimer-- > 0)
2085	{
2086	PTMTIMER pTimer = &pQueue->paTimers[idxTimer];
2087	if ( pTimer->enmType == TMTIMERTYPE_DEV
2088	&& pTimer->u.Dev.pDevIns == pDevIns
2089	&& pTimer->enmState < TMTIMERSTATE_DESTROY)
2090	{
2091	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2092
2093	int rc = tmR3TimerDestroy(pVM, pQueue, pTimer);
2094	AssertRC(rc);
2095
2096	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2097	}
2098	}
2099	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2100	}
2101
2102	LogFlow(("TMR3TimerDestroyDevice: returns VINF_SUCCESS\n"));
2103	return VINF_SUCCESS;
2104	}
2105
2106
2107	/**
2108	* Destroy all timers owned by a USB device.
2109	*
2110	* @returns VBox status code.
2111	* @param pVM The cross context VM structure.
2112	* @param pUsbIns USB device which timers should be destroyed.
2113	*/
2114	VMM_INT_DECL(int) TMR3TimerDestroyUsb(PVM pVM, PPDMUSBINS pUsbIns)
2115	{
2116	LogFlow(("TMR3TimerDestroyUsb: pUsbIns=%p\n", pUsbIns));
2117	if (!pUsbIns)
2118	return VERR_INVALID_PARAMETER;
2119
2120	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
2121	{
2122	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[idxQueue];
2123	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2124	uint32_t idxTimer = pQueue->cTimersAlloc;
2125	while (idxTimer-- > 0)
2126	{
2127	PTMTIMER pTimer = &pQueue->paTimers[idxTimer];
2128	if ( pTimer->enmType == TMTIMERTYPE_USB
2129	&& pTimer->u.Usb.pUsbIns == pUsbIns
2130	&& pTimer->enmState < TMTIMERSTATE_DESTROY)
2131	{
2132	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2133
2134	int rc = tmR3TimerDestroy(pVM, pQueue, pTimer);
2135	AssertRC(rc);
2136
2137	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2138	}
2139	}
2140	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2141	}
2142
2143	LogFlow(("TMR3TimerDestroyUsb: returns VINF_SUCCESS\n"));
2144	return VINF_SUCCESS;
2145	}
2146
2147
2148	/**
2149	* Destroy all timers owned by a driver.
2150	*
2151	* @returns VBox status code.
2152	* @param pVM The cross context VM structure.
2153	* @param pDrvIns Driver which timers should be destroyed.
2154	*/
2155	VMM_INT_DECL(int) TMR3TimerDestroyDriver(PVM pVM, PPDMDRVINS pDrvIns)
2156	{
2157	LogFlow(("TMR3TimerDestroyDriver: pDrvIns=%p\n", pDrvIns));
2158	if (!pDrvIns)
2159	return VERR_INVALID_PARAMETER;
2160
2161	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
2162	{
2163	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[idxQueue];
2164	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2165	uint32_t idxTimer = pQueue->cTimersAlloc;
2166	while (idxTimer-- > 0)
2167	{
2168	PTMTIMER pTimer = &pQueue->paTimers[idxTimer];
2169	if ( pTimer->enmType == TMTIMERTYPE_DRV
2170	&& pTimer->u.Drv.pDrvIns == pDrvIns
2171	&& pTimer->enmState < TMTIMERSTATE_DESTROY)
2172	{
2173	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2174
2175	int rc = tmR3TimerDestroy(pVM, pQueue, pTimer);
2176	AssertRC(rc);
2177
2178	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2179	}
2180	}
2181	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2182	}
2183
2184	LogFlow(("TMR3TimerDestroyDriver: returns VINF_SUCCESS\n"));
2185	return VINF_SUCCESS;
2186	}
2187
2188
2189	/**
2190	* Internal function for getting the clock time.
2191	*
2192	* @returns clock time.
2193	* @param pVM The cross context VM structure.
2194	* @param enmClock The clock.
2195	*/
2196	DECLINLINE(uint64_t) tmClock(PVM pVM, TMCLOCK enmClock)
2197	{
2198	switch (enmClock)
2199	{
2200	case TMCLOCK_VIRTUAL: return TMVirtualGet(pVM);
2201	case TMCLOCK_VIRTUAL_SYNC: return TMVirtualSyncGet(pVM);
2202	case TMCLOCK_REAL: return TMRealGet(pVM);
2203	case TMCLOCK_TSC: return TMCpuTickGet(pVM->apCpusR3[0] /* just take VCPU 0 */);
2204	default:
2205	AssertMsgFailed(("enmClock=%d\n", enmClock));
2206	return ~(uint64_t)0;
2207	}
2208	}
2209
2210
2211	/**
2212	* Checks if the sync queue has one or more expired timers.
2213	*
2214	* @returns true / false.
2215	*
2216	* @param pVM The cross context VM structure.
2217	* @param enmClock The queue.
2218	*/
2219	DECLINLINE(bool) tmR3HasExpiredTimer(PVM pVM, TMCLOCK enmClock)
2220	{
2221	const uint64_t u64Expire = pVM->tm.s.aTimerQueues[enmClock].u64Expire;
2222	return u64Expire != INT64_MAX && u64Expire <= tmClock(pVM, enmClock);
2223	}
2224
2225
2226	/**
2227	* Checks for expired timers in all the queues.
2228	*
2229	* @returns true / false.
2230	* @param pVM The cross context VM structure.
2231	*/
2232	DECLINLINE(bool) tmR3AnyExpiredTimers(PVM pVM)
2233	{
2234	/*
2235	* Combine the time calculation for the first two since we're not on EMT
2236	* TMVirtualSyncGet only permits EMT.
2237	*/
2238	uint64_t u64Now = TMVirtualGetNoCheck(pVM);
2239	if (pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL].u64Expire <= u64Now)
2240	return true;
2241	u64Now = pVM->tm.s.fVirtualSyncTicking
2242	? u64Now - pVM->tm.s.offVirtualSync
2243	: pVM->tm.s.u64VirtualSync;
2244	if (pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC].u64Expire <= u64Now)
2245	return true;
2246
2247	/*
2248	* The remaining timers.
2249	*/
2250	if (tmR3HasExpiredTimer(pVM, TMCLOCK_REAL))
2251	return true;
2252	if (tmR3HasExpiredTimer(pVM, TMCLOCK_TSC))
2253	return true;
2254	return false;
2255	}
2256
2257
2258	/**
2259	* Schedule timer callback.
2260	*
2261	* @param pTimer Timer handle.
2262	* @param pvUser Pointer to the VM.
2263	* @thread Timer thread.
2264	*
2265	* @remark We cannot do the scheduling and queues running from a timer handler
2266	* since it's not executing in EMT, and even if it was it would be async
2267	* and we wouldn't know the state of the affairs.
2268	* So, we'll just raise the timer FF and force any REM execution to exit.
2269	*/
2270	static DECLCALLBACK(void) tmR3TimerCallback(PRTTIMER pTimer, void pvUser, uint64_t /iTick*/)
2271	{
2272	PVM pVM = (PVM)pvUser;
2273	PVMCPU pVCpuDst = pVM->apCpusR3[pVM->tm.s.idTimerCpu];
2274	NOREF(pTimer);
2275
2276	AssertCompile(TMCLOCK_MAX == 4);
2277	STAM_COUNTER_INC(&pVM->tm.s.StatTimerCallback);
2278
2279	#ifdef DEBUG_Sander /* very annoying, keep it private. */
2280	if (VMCPU_FF_IS_SET(pVCpuDst, VMCPU_FF_TIMER))
2281	Log(("tmR3TimerCallback: timer event still pending!!\n"));
2282	#endif
2283	if ( !VMCPU_FF_IS_SET(pVCpuDst, VMCPU_FF_TIMER)
2284	&& ( pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC].idxSchedule != UINT32_MAX /** @todo FIXME - reconsider offSchedule as a reason for running the timer queues. */
2285	\|\| pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL].idxSchedule != UINT32_MAX
2286	\|\| pVM->tm.s.aTimerQueues[TMCLOCK_REAL].idxSchedule != UINT32_MAX
2287	\|\| pVM->tm.s.aTimerQueues[TMCLOCK_TSC].idxSchedule != UINT32_MAX
2288	\|\| tmR3AnyExpiredTimers(pVM)
2289	)
2290	&& !VMCPU_FF_IS_SET(pVCpuDst, VMCPU_FF_TIMER)
2291	&& !pVM->tm.s.fRunningQueues
2292	)
2293	{
2294	Log5(("TM(%u): FF: 0 -> 1\n", __LINE__));
2295	VMCPU_FF_SET(pVCpuDst, VMCPU_FF_TIMER);
2296	VMR3NotifyCpuFFU(pVCpuDst->pUVCpu, VMNOTIFYFF_FLAGS_DONE_REM \| VMNOTIFYFF_FLAGS_POKE);
2297	STAM_COUNTER_INC(&pVM->tm.s.StatTimerCallbackSetFF);
2298	}
2299	}
2300
2301
2302	/**
2303	* Worker for tmR3TimerQueueDoOne that runs pending timers on the specified
2304	* non-empty timer queue.
2305	*
2306	* @param pVM The cross context VM structure.
2307	* @param pQueue The queue to run.
2308	* @param pTimer The head timer. Caller already check that this is
2309	* not NULL.
2310	*/
2311	static void tmR3TimerQueueRun(PVM pVM, PTMTIMERQUEUE pQueue, PTMTIMER pTimer)
2312	{
2313	VM_ASSERT_EMT(pVM); /** @todo relax this */
2314
2315	/*
2316	* Run timers.
2317	*
2318	* We check the clock once and run all timers which are ACTIVE
2319	* and have an expire time less or equal to the time we read.
2320	*
2321	* N.B. A generic unlink must be applied since other threads
2322	* are allowed to mess with any active timer at any time.
2323	*
2324	* However, we only allow EMT to handle EXPIRED_PENDING
2325	* timers, thus enabling the timer handler function to
2326	* arm the timer again.
2327	*/
2328	/** @todo the above 'however' is outdated. */
2329	const uint64_t u64Now = tmClock(pVM, pQueue->enmClock);
2330	while (pTimer->u64Expire <= u64Now)
2331	{
2332	PTMTIMER const pNext = tmTimerGetNext(pQueue, pTimer);
2333	PPDMCRITSECT pCritSect = pTimer->pCritSect;
2334	if (pCritSect)
2335	{
2336	STAM_PROFILE_START(&pTimer->StatCritSectEnter, Locking);
2337	PDMCritSectEnter(pVM, pCritSect, VERR_IGNORED);
2338	STAM_PROFILE_STOP(&pTimer->StatCritSectEnter, Locking);
2339	}
2340	Log2(("tmR3TimerQueueRun: %p:{.enmState=%s, .enmClock=%d, .enmType=%d, u64Expire=%llx (now=%llx) .szName='%s'}\n",
2341	pTimer, tmTimerState(pTimer->enmState), pQueue->enmClock, pTimer->enmType, pTimer->u64Expire, u64Now, pTimer->szName));
2342	bool fRc;
2343	TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_EXPIRED_GET_UNLINK, TMTIMERSTATE_ACTIVE, fRc);
2344	if (fRc)
2345	{
2346	Assert(pTimer->idxScheduleNext == UINT32_MAX); /* this can trigger falsely */
2347
2348	/* unlink */
2349	const PTMTIMER pPrev = tmTimerGetPrev(pQueue, pTimer);
2350	if (pPrev)
2351	tmTimerSetNext(pQueue, pPrev, pNext);
2352	else
2353	{
2354	tmTimerQueueSetHead(pQueue, pQueue, pNext);
2355	pQueue->u64Expire = pNext ? pNext->u64Expire : INT64_MAX;
2356	}
2357	if (pNext)
2358	tmTimerSetPrev(pQueue, pNext, pPrev);
2359	pTimer->idxNext = UINT32_MAX;
2360	pTimer->idxPrev = UINT32_MAX;
2361
2362	/* fire */
2363	TM_SET_STATE(pTimer, TMTIMERSTATE_EXPIRED_DELIVER);
2364	STAM_PROFILE_START(&pTimer->StatTimer, PrfTimer);
2365	switch (pTimer->enmType)
2366	{
2367	case TMTIMERTYPE_DEV: pTimer->u.Dev.pfnTimer(pTimer->u.Dev.pDevIns, pTimer->hSelf, pTimer->pvUser); break;
2368	case TMTIMERTYPE_USB: pTimer->u.Usb.pfnTimer(pTimer->u.Usb.pUsbIns, pTimer->hSelf, pTimer->pvUser); break;
2369	case TMTIMERTYPE_DRV: pTimer->u.Drv.pfnTimer(pTimer->u.Drv.pDrvIns, pTimer->hSelf, pTimer->pvUser); break;
2370	case TMTIMERTYPE_INTERNAL: pTimer->u.Internal.pfnTimer(pVM, pTimer->hSelf, pTimer->pvUser); break;
2371	default:
2372	AssertMsgFailed(("Invalid timer type %d (%s)\n", pTimer->enmType, pTimer->szName));
2373	break;
2374	}
2375	STAM_PROFILE_STOP(&pTimer->StatTimer, PrfTimer);
2376
2377	/* change the state if it wasn't changed already in the handler. */
2378	TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_STOPPED, TMTIMERSTATE_EXPIRED_DELIVER, fRc);
2379	Log2(("tmR3TimerQueueRun: new state %s\n", tmTimerState(pTimer->enmState)));
2380	}
2381	if (pCritSect)
2382	PDMCritSectLeave(pVM, pCritSect);
2383
2384	/* Advance? */
2385	pTimer = pNext;
2386	if (!pTimer)
2387	break;
2388	} /* run loop */
2389	}
2390
2391
2392	/**
2393	* Service one regular timer queue.
2394	*
2395	* @param pVM The cross context VM structure.
2396	* @param pQueue The queue.
2397	*/
2398	static void tmR3TimerQueueDoOne(PVM pVM, PTMTIMERQUEUE pQueue)
2399	{
2400	Assert(pQueue->enmClock != TMCLOCK_VIRTUAL_SYNC);
2401
2402	/*
2403	* Only one thread should be "doing" the queue.
2404	*/
2405	if (ASMAtomicCmpXchgBool(&pQueue->fBeingProcessed, true, false))
2406	{
2407	STAM_PROFILE_START(&pQueue->StatDo, s);
2408	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
2409
2410	if (pQueue->idxSchedule != UINT32_MAX)
2411	tmTimerQueueSchedule(pVM, pQueue, pQueue);
2412
2413	PTMTIMER pHead = tmTimerQueueGetHead(pQueue, pQueue);
2414	if (pHead)
2415	tmR3TimerQueueRun(pVM, pQueue, pHead);
2416
2417	PDMCritSectLeave(pVM, &pQueue->TimerLock);
2418	STAM_PROFILE_STOP(&pQueue->StatDo, s);
2419	ASMAtomicWriteBool(&pQueue->fBeingProcessed, false);
2420	}
2421	}
2422
2423
2424	/**
2425	* Schedules and runs any pending times in the timer queue for the
2426	* synchronous virtual clock.
2427	*
2428	* This scheduling is a bit different from the other queues as it need
2429	* to implement the special requirements of the timer synchronous virtual
2430	* clock, thus this 2nd queue run function.
2431	*
2432	* @param pVM The cross context VM structure.
2433	*
2434	* @remarks The caller must the Virtual Sync lock. Owning the TM lock is no
2435	* longer important.
2436	*/
2437	static void tmR3TimerQueueRunVirtualSync(PVM pVM)
2438	{
2439	PTMTIMERQUEUE const pQueue = &pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC];
2440	VM_ASSERT_EMT(pVM);
2441	Assert(PDMCritSectIsOwner(pVM, &pVM->tm.s.VirtualSyncLock));
2442
2443	/*
2444	* Any timers?
2445	*/
2446	PTMTIMER pNext = tmTimerQueueGetHead(pQueue, pQueue);
2447	if (RT_UNLIKELY(!pNext))
2448	{
2449	Assert(pVM->tm.s.fVirtualSyncTicking \|\| !pVM->tm.s.cVirtualTicking);
2450	return;
2451	}
2452	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncRun);
2453
2454	/*
2455	* Calculate the time frame for which we will dispatch timers.
2456	*
2457	* We use a time frame ranging from the current sync time (which is most likely the
2458	* same as the head timer) and some configurable period (100000ns) up towards the
2459	* current virtual time. This period might also need to be restricted by the catch-up
2460	* rate so frequent calls to this function won't accelerate the time too much, however
2461	* this will be implemented at a later point if necessary.
2462	*
2463	* Without this frame we would 1) having to run timers much more frequently
2464	* and 2) lag behind at a steady rate.
2465	*/
2466	const uint64_t u64VirtualNow = TMVirtualGetNoCheck(pVM);
2467	uint64_t const offSyncGivenUp = pVM->tm.s.offVirtualSyncGivenUp;
2468	uint64_t u64Now;
2469	if (!pVM->tm.s.fVirtualSyncTicking)
2470	{
2471	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncRunStoppedAlready);
2472	u64Now = pVM->tm.s.u64VirtualSync;
2473	Assert(u64Now <= pNext->u64Expire);
2474	}
2475	else
2476	{
2477	/* Calc 'now'. */
2478	bool fStopCatchup = false;
2479	bool fUpdateStuff = false;
2480	uint64_t off = pVM->tm.s.offVirtualSync;
2481	if (pVM->tm.s.fVirtualSyncCatchUp)
2482	{
2483	uint64_t u64Delta = u64VirtualNow - pVM->tm.s.u64VirtualSyncCatchUpPrev;
2484	if (RT_LIKELY(!(u64Delta >> 32)))
2485	{
2486	uint64_t u64Sub = ASMMultU64ByU32DivByU32(u64Delta, pVM->tm.s.u32VirtualSyncCatchUpPercentage, 100);
2487	if (off > u64Sub + offSyncGivenUp)
2488	{
2489	off -= u64Sub;
2490	Log4(("TM: %'RU64/-%'8RU64: sub %'RU64 [tmR3TimerQueueRunVirtualSync]\n", u64VirtualNow - off, off - offSyncGivenUp, u64Sub));
2491	}
2492	else
2493	{
2494	STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatVirtualSyncCatchup, c);
2495	fStopCatchup = true;
2496	off = offSyncGivenUp;
2497	}
2498	fUpdateStuff = true;
2499	}
2500	}
2501	u64Now = u64VirtualNow - off;
2502
2503	/* Adjust against last returned time. */
2504	uint64_t u64Last = ASMAtomicUoReadU64(&pVM->tm.s.u64VirtualSync);
2505	if (u64Last > u64Now)
2506	{
2507	u64Now = u64Last + 1;
2508	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncGetAdjLast);
2509	}
2510
2511	/* Check if stopped by expired timer. */
2512	uint64_t const u64Expire = pNext->u64Expire;
2513	if (u64Now >= u64Expire)
2514	{
2515	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncRunStop);
2516	u64Now = u64Expire;
2517	ASMAtomicWriteU64(&pVM->tm.s.u64VirtualSync, u64Now);
2518	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncTicking, false);
2519	Log4(("TM: %'RU64/-%'8RU64: exp tmr [tmR3TimerQueueRunVirtualSync]\n", u64Now, u64VirtualNow - u64Now - offSyncGivenUp));
2520	}
2521	else
2522	{
2523	ASMAtomicWriteU64(&pVM->tm.s.u64VirtualSync, u64Now);
2524	if (fUpdateStuff)
2525	{
2526	ASMAtomicWriteU64(&pVM->tm.s.offVirtualSync, off);
2527	ASMAtomicWriteU64(&pVM->tm.s.u64VirtualSyncCatchUpPrev, u64VirtualNow);
2528	ASMAtomicWriteU64(&pVM->tm.s.u64VirtualSync, u64Now);
2529	if (fStopCatchup)
2530	{
2531	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncCatchUp, false);
2532	Log4(("TM: %'RU64/0: caught up [tmR3TimerQueueRunVirtualSync]\n", u64VirtualNow));
2533	}
2534	}
2535	}
2536	}
2537
2538	/* calc end of frame. */
2539	uint64_t u64Max = u64Now + pVM->tm.s.u32VirtualSyncScheduleSlack;
2540	if (u64Max > u64VirtualNow - offSyncGivenUp)
2541	u64Max = u64VirtualNow - offSyncGivenUp;
2542
2543	/* assert sanity */
2544	Assert(u64Now <= u64VirtualNow - offSyncGivenUp);
2545	Assert(u64Max <= u64VirtualNow - offSyncGivenUp);
2546	Assert(u64Now <= u64Max);
2547	Assert(offSyncGivenUp == pVM->tm.s.offVirtualSyncGivenUp);
2548
2549	/*
2550	* Process the expired timers moving the clock along as we progress.
2551	*/
2552	#ifdef VBOX_STRICT
2553	uint64_t u64Prev = u64Now; NOREF(u64Prev);
2554	#endif
2555	while (pNext && pNext->u64Expire <= u64Max)
2556	{
2557	/* Advance */
2558	PTMTIMER pTimer = pNext;
2559	pNext = tmTimerGetNext(pQueue, pTimer);
2560
2561	/* Take the associated lock. */
2562	PPDMCRITSECT pCritSect = pTimer->pCritSect;
2563	if (pCritSect)
2564	{
2565	STAM_PROFILE_START(&pTimer->StatCritSectEnter, Locking);
2566	PDMCritSectEnter(pVM, pCritSect, VERR_IGNORED);
2567	STAM_PROFILE_STOP(&pTimer->StatCritSectEnter, Locking);
2568	}
2569
2570	Log2(("tmR3TimerQueueRunVirtualSync: %p:{.enmState=%s, .enmClock=%d, .enmType=%d, u64Expire=%llx (now=%llx) .szName='%s'}\n",
2571	pTimer, tmTimerState(pTimer->enmState), pQueue->enmClock, pTimer->enmType, pTimer->u64Expire, u64Now, pTimer->szName));
2572
2573	/* Advance the clock - don't permit timers to be out of order or armed
2574	in the 'past'. */
2575	#ifdef VBOX_STRICT
2576	AssertMsg(pTimer->u64Expire >= u64Prev, ("%'RU64 < %'RU64 %s\n", pTimer->u64Expire, u64Prev, pTimer->szName));
2577	u64Prev = pTimer->u64Expire;
2578	#endif
2579	ASMAtomicWriteU64(&pVM->tm.s.u64VirtualSync, pTimer->u64Expire);
2580	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncTicking, false);
2581
2582	/* Unlink it, change the state and do the callout. */
2583	tmTimerQueueUnlinkActive(pVM, pQueue, pQueue, pTimer);
2584	TM_SET_STATE(pTimer, TMTIMERSTATE_EXPIRED_DELIVER);
2585	STAM_PROFILE_START(&pTimer->StatTimer, PrfTimer);
2586	switch (pTimer->enmType)
2587	{
2588	case TMTIMERTYPE_DEV: pTimer->u.Dev.pfnTimer(pTimer->u.Dev.pDevIns, pTimer->hSelf, pTimer->pvUser); break;
2589	case TMTIMERTYPE_USB: pTimer->u.Usb.pfnTimer(pTimer->u.Usb.pUsbIns, pTimer->hSelf, pTimer->pvUser); break;
2590	case TMTIMERTYPE_DRV: pTimer->u.Drv.pfnTimer(pTimer->u.Drv.pDrvIns, pTimer->hSelf, pTimer->pvUser); break;
2591	case TMTIMERTYPE_INTERNAL: pTimer->u.Internal.pfnTimer(pVM, pTimer->hSelf, pTimer->pvUser); break;
2592	default:
2593	AssertMsgFailed(("Invalid timer type %d (%s)\n", pTimer->enmType, pTimer->szName));
2594	break;
2595	}
2596	STAM_PROFILE_STOP(&pTimer->StatTimer, PrfTimer);
2597
2598	/* Change the state if it wasn't changed already in the handler.
2599	Reset the Hz hint too since this is the same as TMTimerStop. */
2600	bool fRc;
2601	TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_STOPPED, TMTIMERSTATE_EXPIRED_DELIVER, fRc);
2602	if (fRc && pTimer->uHzHint)
2603	{
2604	if (pTimer->uHzHint >= pQueue->uMaxHzHint)
2605	ASMAtomicOrU64(&pVM->tm.s.HzHint.u64Combined, RT_BIT_32(TMCLOCK_VIRTUAL_SYNC) \| RT_BIT_32(TMCLOCK_VIRTUAL_SYNC + 16));
2606	pTimer->uHzHint = 0;
2607	}
2608	Log2(("tmR3TimerQueueRunVirtualSync: new state %s\n", tmTimerState(pTimer->enmState)));
2609
2610	/* Leave the associated lock. */
2611	if (pCritSect)
2612	PDMCritSectLeave(pVM, pCritSect);
2613	} /* run loop */
2614
2615
2616	/*
2617	* Restart the clock if it was stopped to serve any timers,
2618	* and start/adjust catch-up if necessary.
2619	*/
2620	if ( !pVM->tm.s.fVirtualSyncTicking
2621	&& pVM->tm.s.cVirtualTicking)
2622	{
2623	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncRunRestart);
2624
2625	/* calc the slack we've handed out. */
2626	const uint64_t u64VirtualNow2 = TMVirtualGetNoCheck(pVM);
2627	Assert(u64VirtualNow2 >= u64VirtualNow);
2628	AssertMsg(pVM->tm.s.u64VirtualSync >= u64Now, ("%'RU64 < %'RU64\n", pVM->tm.s.u64VirtualSync, u64Now));
2629	const uint64_t offSlack = pVM->tm.s.u64VirtualSync - u64Now;
2630	STAM_STATS({
2631	if (offSlack)
2632	{
2633	PSTAMPROFILE p = &pVM->tm.s.StatVirtualSyncRunSlack;
2634	p->cPeriods++;
2635	p->cTicks += offSlack;
2636	if (p->cTicksMax < offSlack) p->cTicksMax = offSlack;
2637	if (p->cTicksMin > offSlack) p->cTicksMin = offSlack;
2638	}
2639	});
2640
2641	/* Let the time run a little bit while we were busy running timers(?). */
2642	uint64_t u64Elapsed;
2643	#define MAX_ELAPSED 30000U /* ns */
2644	if (offSlack > MAX_ELAPSED)
2645	u64Elapsed = 0;
2646	else
2647	{
2648	u64Elapsed = u64VirtualNow2 - u64VirtualNow;
2649	if (u64Elapsed > MAX_ELAPSED)
2650	u64Elapsed = MAX_ELAPSED;
2651	u64Elapsed = u64Elapsed > offSlack ? u64Elapsed - offSlack : 0;
2652	}
2653	#undef MAX_ELAPSED
2654
2655	/* Calc the current offset. */
2656	uint64_t offNew = u64VirtualNow2 - pVM->tm.s.u64VirtualSync - u64Elapsed;
2657	Assert(!(offNew & RT_BIT_64(63)));
2658	uint64_t offLag = offNew - pVM->tm.s.offVirtualSyncGivenUp;
2659	Assert(!(offLag & RT_BIT_64(63)));
2660
2661	/*
2662	* Deal with starting, adjusting and stopping catchup.
2663	*/
2664	if (pVM->tm.s.fVirtualSyncCatchUp)
2665	{
2666	if (offLag <= pVM->tm.s.u64VirtualSyncCatchUpStopThreshold)
2667	{
2668	/* stop */
2669	STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatVirtualSyncCatchup, c);
2670	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncCatchUp, false);
2671	Log4(("TM: %'RU64/-%'8RU64: caught up [pt]\n", u64VirtualNow2 - offNew, offLag));
2672	}
2673	else if (offLag <= pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold)
2674	{
2675	/* adjust */
2676	unsigned i = 0;
2677	while ( i + 1 < RT_ELEMENTS(pVM->tm.s.aVirtualSyncCatchUpPeriods)
2678	&& offLag >= pVM->tm.s.aVirtualSyncCatchUpPeriods[i + 1].u64Start)
2679	i++;
2680	if (pVM->tm.s.u32VirtualSyncCatchUpPercentage < pVM->tm.s.aVirtualSyncCatchUpPeriods[i].u32Percentage)
2681	{
2682	STAM_COUNTER_INC(&pVM->tm.s.aStatVirtualSyncCatchupAdjust[i]);
2683	ASMAtomicWriteU32(&pVM->tm.s.u32VirtualSyncCatchUpPercentage, pVM->tm.s.aVirtualSyncCatchUpPeriods[i].u32Percentage);
2684	Log4(("TM: %'RU64/%'8RU64: adj %u%%\n", u64VirtualNow2 - offNew, offLag, pVM->tm.s.u32VirtualSyncCatchUpPercentage));
2685	}
2686	pVM->tm.s.u64VirtualSyncCatchUpPrev = u64VirtualNow2;
2687	}
2688	else
2689	{
2690	/* give up */
2691	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncGiveUp);
2692	STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatVirtualSyncCatchup, c);
2693	ASMAtomicWriteU64((uint64_t volatile *)&pVM->tm.s.offVirtualSyncGivenUp, offNew);
2694	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncCatchUp, false);
2695	Log4(("TM: %'RU64/%'8RU64: give up %u%%\n", u64VirtualNow2 - offNew, offLag, pVM->tm.s.u32VirtualSyncCatchUpPercentage));
2696	LogRel(("TM: Giving up catch-up attempt at a %'RU64 ns lag; new total: %'RU64 ns\n", offLag, offNew));
2697	}
2698	}
2699	else if (offLag >= pVM->tm.s.aVirtualSyncCatchUpPeriods[0].u64Start)
2700	{
2701	if (offLag <= pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold)
2702	{
2703	/* start */
2704	STAM_PROFILE_ADV_START(&pVM->tm.s.StatVirtualSyncCatchup, c);
2705	unsigned i = 0;
2706	while ( i + 1 < RT_ELEMENTS(pVM->tm.s.aVirtualSyncCatchUpPeriods)
2707	&& offLag >= pVM->tm.s.aVirtualSyncCatchUpPeriods[i + 1].u64Start)
2708	i++;
2709	STAM_COUNTER_INC(&pVM->tm.s.aStatVirtualSyncCatchupInitial[i]);
2710	ASMAtomicWriteU32(&pVM->tm.s.u32VirtualSyncCatchUpPercentage, pVM->tm.s.aVirtualSyncCatchUpPeriods[i].u32Percentage);
2711	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncCatchUp, true);
2712	Log4(("TM: %'RU64/%'8RU64: catch-up %u%%\n", u64VirtualNow2 - offNew, offLag, pVM->tm.s.u32VirtualSyncCatchUpPercentage));
2713	}
2714	else
2715	{
2716	/* don't bother */
2717	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncGiveUpBeforeStarting);
2718	ASMAtomicWriteU64((uint64_t volatile *)&pVM->tm.s.offVirtualSyncGivenUp, offNew);
2719	Log4(("TM: %'RU64/%'8RU64: give up\n", u64VirtualNow2 - offNew, offLag));
2720	LogRel(("TM: Not bothering to attempt catching up a %'RU64 ns lag; new total: %'RU64\n", offLag, offNew));
2721	}
2722	}
2723
2724	/*
2725	* Update the offset and restart the clock.
2726	*/
2727	Assert(!(offNew & RT_BIT_64(63)));
2728	ASMAtomicWriteU64(&pVM->tm.s.offVirtualSync, offNew);
2729	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncTicking, true);
2730	}
2731	}
2732
2733
2734	/**
2735	* Deals with stopped Virtual Sync clock.
2736	*
2737	* This is called by the forced action flag handling code in EM when it
2738	* encounters the VM_FF_TM_VIRTUAL_SYNC flag. It is called by all VCPUs and they
2739	* will block on the VirtualSyncLock until the pending timers has been executed
2740	* and the clock restarted.
2741	*
2742	* @param pVM The cross context VM structure.
2743	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
2744	*
2745	* @thread EMTs
2746	*/
2747	VMMR3_INT_DECL(void) TMR3VirtualSyncFF(PVM pVM, PVMCPU pVCpu)
2748	{
2749	Log2(("TMR3VirtualSyncFF:\n"));
2750
2751	/*
2752	* The EMT doing the timers is diverted to them.
2753	*/
2754	if (pVCpu->idCpu == pVM->tm.s.idTimerCpu)
2755	TMR3TimerQueuesDo(pVM);
2756	/*
2757	* The other EMTs will block on the virtual sync lock and the first owner
2758	* will run the queue and thus restarting the clock.
2759	*
2760	* Note! This is very suboptimal code wrt to resuming execution when there
2761	* are more than two Virtual CPUs, since they will all have to enter
2762	* the critical section one by one. But it's a very simple solution
2763	* which will have to do the job for now.
2764	*/
2765	else
2766	{
2767	/** @todo Optimize for SMP */
2768	STAM_PROFILE_START(&pVM->tm.s.StatVirtualSyncFF, a);
2769	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED);
2770	if (pVM->tm.s.fVirtualSyncTicking)
2771	{
2772	STAM_PROFILE_STOP(&pVM->tm.s.StatVirtualSyncFF, a); /* before the unlock! */
2773	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
2774	Log2(("TMR3VirtualSyncFF: ticking\n"));
2775	}
2776	else
2777	{
2778	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
2779
2780	/* try run it. */
2781	PDMCritSectEnter(pVM, &pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL].TimerLock, VERR_IGNORED);
2782	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED);
2783	if (pVM->tm.s.fVirtualSyncTicking)
2784	Log2(("TMR3VirtualSyncFF: ticking (2)\n"));
2785	else
2786	{
2787	ASMAtomicWriteBool(&pVM->tm.s.fRunningVirtualSyncQueue, true);
2788	Log2(("TMR3VirtualSyncFF: running queue\n"));
2789
2790	Assert(pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC].idxSchedule == UINT32_MAX);
2791	tmR3TimerQueueRunVirtualSync(pVM);
2792	if (pVM->tm.s.fVirtualSyncTicking) /** @todo move into tmR3TimerQueueRunVirtualSync - FIXME */
2793	VM_FF_CLEAR(pVM, VM_FF_TM_VIRTUAL_SYNC);
2794
2795	ASMAtomicWriteBool(&pVM->tm.s.fRunningVirtualSyncQueue, false);
2796	}
2797	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
2798	STAM_PROFILE_STOP(&pVM->tm.s.StatVirtualSyncFF, a); /* before the unlock! */
2799	PDMCritSectLeave(pVM, &pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL].TimerLock);
2800	}
2801	}
2802	}
2803
2804
2805	/**
2806	* Service the special virtual sync timer queue.
2807	*
2808	* @param pVM The cross context VM structure.
2809	* @param pVCpuDst The destination VCpu.
2810	*/
2811	static void tmR3TimerQueueDoVirtualSync(PVM pVM, PVMCPU pVCpuDst)
2812	{
2813	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC];
2814	if (ASMAtomicCmpXchgBool(&pQueue->fBeingProcessed, true, false))
2815	{
2816	STAM_PROFILE_START(&pQueue->StatDo, s1);
2817	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
2818	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED);
2819	ASMAtomicWriteBool(&pVM->tm.s.fRunningVirtualSyncQueue, true);
2820	VMCPU_FF_CLEAR(pVCpuDst, VMCPU_FF_TIMER); /* Clear the FF once we started working for real. */
2821
2822	Assert(pQueue->idxSchedule == UINT32_MAX);
2823	tmR3TimerQueueRunVirtualSync(pVM);
2824	if (pVM->tm.s.fVirtualSyncTicking) /** @todo move into tmR3TimerQueueRunVirtualSync - FIXME */
2825	VM_FF_CLEAR(pVM, VM_FF_TM_VIRTUAL_SYNC);
2826
2827	ASMAtomicWriteBool(&pVM->tm.s.fRunningVirtualSyncQueue, false);
2828	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
2829	PDMCritSectLeave(pVM, &pQueue->TimerLock);
2830	STAM_PROFILE_STOP(&pQueue->StatDo, s1);
2831	ASMAtomicWriteBool(&pQueue->fBeingProcessed, false);
2832	}
2833	}
2834
2835
2836	/**
2837	* Schedules and runs any pending timers.
2838	*
2839	* This is normally called from a forced action handler in EMT.
2840	*
2841	* @param pVM The cross context VM structure.
2842	*
2843	* @thread EMT (actually EMT0, but we fend off the others)
2844	*/
2845	VMMR3DECL(void) TMR3TimerQueuesDo(PVM pVM)
2846	{
2847	/*
2848	* Only the dedicated timer EMT should do stuff here.
2849	* (fRunningQueues is only used as an indicator.)
2850	*/
2851	Assert(pVM->tm.s.idTimerCpu < pVM->cCpus);
2852	PVMCPU pVCpuDst = pVM->apCpusR3[pVM->tm.s.idTimerCpu];
2853	if (VMMGetCpu(pVM) != pVCpuDst)
2854	{
2855	Assert(pVM->cCpus > 1);
2856	return;
2857	}
2858	STAM_PROFILE_START(&pVM->tm.s.StatDoQueues, a);
2859	Log2(("TMR3TimerQueuesDo:\n"));
2860	Assert(!pVM->tm.s.fRunningQueues);
2861	ASMAtomicWriteBool(&pVM->tm.s.fRunningQueues, true);
2862
2863	/*
2864	* Process the queues.
2865	*/
2866	AssertCompile(TMCLOCK_MAX == 4);
2867
2868	/*
2869	* TMCLOCK_VIRTUAL_SYNC (see also TMR3VirtualSyncFF)
2870	*/
2871	tmR3TimerQueueDoVirtualSync(pVM, pVCpuDst);
2872
2873	/*
2874	* TMCLOCK_VIRTUAL
2875	*/
2876	tmR3TimerQueueDoOne(pVM, &pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL]);
2877
2878	/*
2879	* TMCLOCK_TSC
2880	*/
2881	Assert(pVM->tm.s.aTimerQueues[TMCLOCK_TSC].idxActive == UINT32_MAX); /* not used */
2882
2883	/*
2884	* TMCLOCK_REAL
2885	*/
2886	tmR3TimerQueueDoOne(pVM, &pVM->tm.s.aTimerQueues[TMCLOCK_REAL]);
2887
2888	#ifdef VBOX_STRICT
2889	/* check that we didn't screw up. */
2890	tmTimerQueuesSanityChecks(pVM, "TMR3TimerQueuesDo");
2891	#endif
2892
2893	/* done */
2894	Log2(("TMR3TimerQueuesDo: returns void\n"));
2895	ASMAtomicWriteBool(&pVM->tm.s.fRunningQueues, false);
2896	STAM_PROFILE_STOP(&pVM->tm.s.StatDoQueues, a);
2897	}
2898
2899
2900
2901	/** @name Saved state values
2902	* @{ */
2903	#define TMTIMERSTATE_SAVED_PENDING_STOP 4
2904	#define TMTIMERSTATE_SAVED_PENDING_SCHEDULE 7
2905	/** @} */
2906
2907
2908	/**
2909	* Saves the state of a timer to a saved state.
2910	*
2911	* @returns VBox status code.
2912	* @param pVM The cross context VM structure.
2913	* @param hTimer Timer to save.
2914	* @param pSSM Save State Manager handle.
2915	*/
2916	VMMR3DECL(int) TMR3TimerSave(PVM pVM, TMTIMERHANDLE hTimer, PSSMHANDLE pSSM)
2917	{
2918	VM_ASSERT_EMT(pVM);
2919	TMTIMER_HANDLE_TO_VARS_RETURN(pVM, hTimer); /* => pTimer, pQueueCC, pQueue, idxTimer, idxQueue */
2920	LogFlow(("TMR3TimerSave: %p:{enmState=%s, .szName='%s'} pSSM=%p\n", pTimer, tmTimerState(pTimer->enmState), pTimer->szName, pSSM));
2921
2922	switch (pTimer->enmState)
2923	{
2924	case TMTIMERSTATE_STOPPED:
2925	case TMTIMERSTATE_PENDING_STOP:
2926	case TMTIMERSTATE_PENDING_STOP_SCHEDULE:
2927	return SSMR3PutU8(pSSM, TMTIMERSTATE_SAVED_PENDING_STOP);
2928
2929	case TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE:
2930	case TMTIMERSTATE_PENDING_RESCHEDULE_SET_EXPIRE:
2931	AssertMsgFailed(("u64Expire is being updated! (%s)\n", pTimer->szName));
2932	if (!RTThreadYield())
2933	RTThreadSleep(1);
2934	RT_FALL_THRU();
2935	case TMTIMERSTATE_ACTIVE:
2936	case TMTIMERSTATE_PENDING_SCHEDULE:
2937	case TMTIMERSTATE_PENDING_RESCHEDULE:
2938	SSMR3PutU8(pSSM, TMTIMERSTATE_SAVED_PENDING_SCHEDULE);
2939	return SSMR3PutU64(pSSM, pTimer->u64Expire);
2940
2941	case TMTIMERSTATE_EXPIRED_GET_UNLINK:
2942	case TMTIMERSTATE_EXPIRED_DELIVER:
2943	case TMTIMERSTATE_DESTROY:
2944	case TMTIMERSTATE_FREE:
2945	case TMTIMERSTATE_INVALID:
2946	AssertMsgFailed(("Invalid timer state %d %s (%s)\n", pTimer->enmState, tmTimerState(pTimer->enmState), pTimer->szName));
2947	return SSMR3HandleSetStatus(pSSM, VERR_TM_INVALID_STATE);
2948	}
2949
2950	AssertMsgFailed(("Unknown timer state %d (%s)\n", pTimer->enmState, pTimer->szName));
2951	return SSMR3HandleSetStatus(pSSM, VERR_TM_UNKNOWN_STATE);
2952	}
2953
2954
2955	/**
2956	* Loads the state of a timer from a saved state.
2957	*
2958	* @returns VBox status code.
2959	* @param pVM The cross context VM structure.
2960	* @param hTimer Handle of Timer to restore.
2961	* @param pSSM Save State Manager handle.
2962	*/
2963	VMMR3DECL(int) TMR3TimerLoad(PVM pVM, TMTIMERHANDLE hTimer, PSSMHANDLE pSSM)
2964	{
2965	VM_ASSERT_EMT(pVM);
2966	TMTIMER_HANDLE_TO_VARS_RETURN(pVM, hTimer); /* => pTimer, pQueueCC, pQueue, idxTimer, idxQueue */
2967	Assert(pSSM);
2968	LogFlow(("TMR3TimerLoad: %p:{enmState=%s, .szName='%s'} pSSM=%p\n", pTimer, tmTimerState(pTimer->enmState), pTimer->szName, pSSM));
2969
2970	/*
2971	* Load the state and validate it.
2972	*/
2973	uint8_t u8State;
2974	int rc = SSMR3GetU8(pSSM, &u8State);
2975	if (RT_FAILURE(rc))
2976	return rc;
2977
2978	/* TMTIMERSTATE_SAVED_XXX: Workaround for accidental state shift in r47786 (2009-05-26 19:12:12). */
2979	if ( u8State == TMTIMERSTATE_SAVED_PENDING_STOP + 1
2980	\|\| u8State == TMTIMERSTATE_SAVED_PENDING_SCHEDULE + 1)
2981	u8State--;
2982
2983	if ( u8State != TMTIMERSTATE_SAVED_PENDING_STOP
2984	&& u8State != TMTIMERSTATE_SAVED_PENDING_SCHEDULE)
2985	{
2986	AssertLogRelMsgFailed(("u8State=%d\n", u8State));
2987	return SSMR3HandleSetStatus(pSSM, VERR_TM_LOAD_STATE);
2988	}
2989
2990	/* Enter the critical sections to make TMTimerSet/Stop happy. */
2991	if (pQueue->enmClock == TMCLOCK_VIRTUAL_SYNC)
2992	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED);
2993	PPDMCRITSECT pCritSect = pTimer->pCritSect;
2994	if (pCritSect)
2995	PDMCritSectEnter(pVM, pCritSect, VERR_IGNORED);
2996
2997	if (u8State == TMTIMERSTATE_SAVED_PENDING_SCHEDULE)
2998	{
2999	/*
3000	* Load the expire time.
3001	*/
3002	uint64_t u64Expire;
3003	rc = SSMR3GetU64(pSSM, &u64Expire);
3004	if (RT_FAILURE(rc))
3005	return rc;
3006
3007	/*
3008	* Set it.
3009	*/
3010	Log(("u8State=%d u64Expire=%llu\n", u8State, u64Expire));
3011	rc = TMTimerSet(pVM, hTimer, u64Expire);
3012	}
3013	else
3014	{
3015	/*
3016	* Stop it.
3017	*/
3018	Log(("u8State=%d\n", u8State));
3019	rc = TMTimerStop(pVM, hTimer);
3020	}
3021
3022	if (pCritSect)
3023	PDMCritSectLeave(pVM, pCritSect);
3024	if (pQueue->enmClock == TMCLOCK_VIRTUAL_SYNC)
3025	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
3026
3027	/*
3028	* On failure set SSM status.
3029	*/
3030	if (RT_FAILURE(rc))
3031	rc = SSMR3HandleSetStatus(pSSM, rc);
3032	return rc;
3033	}
3034
3035
3036	/**
3037	* Skips the state of a timer in a given saved state.
3038	*
3039	* @returns VBox status.
3040	* @param pSSM Save State Manager handle.
3041	* @param pfActive Where to store whether the timer was active
3042	* when the state was saved.
3043	*/
3044	VMMR3DECL(int) TMR3TimerSkip(PSSMHANDLE pSSM, bool *pfActive)
3045	{
3046	Assert(pSSM); AssertPtr(pfActive);
3047	LogFlow(("TMR3TimerSkip: pSSM=%p pfActive=%p\n", pSSM, pfActive));
3048
3049	/*
3050	* Load the state and validate it.
3051	*/
3052	uint8_t u8State;
3053	int rc = SSMR3GetU8(pSSM, &u8State);
3054	if (RT_FAILURE(rc))
3055	return rc;
3056
3057	/* TMTIMERSTATE_SAVED_XXX: Workaround for accidental state shift in r47786 (2009-05-26 19:12:12). */
3058	if ( u8State == TMTIMERSTATE_SAVED_PENDING_STOP + 1
3059	\|\| u8State == TMTIMERSTATE_SAVED_PENDING_SCHEDULE + 1)
3060	u8State--;
3061
3062	if ( u8State != TMTIMERSTATE_SAVED_PENDING_STOP
3063	&& u8State != TMTIMERSTATE_SAVED_PENDING_SCHEDULE)
3064	{
3065	AssertLogRelMsgFailed(("u8State=%d\n", u8State));
3066	return SSMR3HandleSetStatus(pSSM, VERR_TM_LOAD_STATE);
3067	}
3068
3069	*pfActive = (u8State == TMTIMERSTATE_SAVED_PENDING_SCHEDULE);
3070	if (*pfActive)
3071	{
3072	/*
3073	* Load the expire time.
3074	*/
3075	uint64_t u64Expire;
3076	rc = SSMR3GetU64(pSSM, &u64Expire);
3077	}
3078
3079	return rc;
3080	}
3081
3082
3083	/**
3084	* Associates a critical section with a timer.
3085	*
3086	* The critical section will be entered prior to doing the timer call back, thus
3087	* avoiding potential races between the timer thread and other threads trying to
3088	* stop or adjust the timer expiration while it's being delivered. The timer
3089	* thread will leave the critical section when the timer callback returns.
3090	*
3091	* In strict builds, ownership of the critical section will be asserted by
3092	* TMTimerSet, TMTimerStop, TMTimerGetExpire and TMTimerDestroy (when called at
3093	* runtime).
3094	*
3095	* @retval VINF_SUCCESS on success.
3096	* @retval VERR_INVALID_HANDLE if the timer handle is NULL or invalid
3097	* (asserted).
3098	* @retval VERR_INVALID_PARAMETER if pCritSect is NULL or has an invalid magic
3099	* (asserted).
3100	* @retval VERR_ALREADY_EXISTS if a critical section was already associated
3101	* with the timer (asserted).
3102	* @retval VERR_INVALID_STATE if the timer isn't stopped.
3103	*
3104	* @param pVM The cross context VM structure.
3105	* @param hTimer The timer handle.
3106	* @param pCritSect The critical section. The caller must make sure this
3107	* is around for the life time of the timer.
3108	*
3109	* @thread Any, but the caller is responsible for making sure the timer is not
3110	* active.
3111	*/
3112	VMMR3DECL(int) TMR3TimerSetCritSect(PVM pVM, TMTIMERHANDLE hTimer, PPDMCRITSECT pCritSect)
3113	{
3114	TMTIMER_HANDLE_TO_VARS_RETURN(pVM, hTimer); /* => pTimer, pQueueCC, pQueue, idxTimer, idxQueue */
3115	AssertPtrReturn(pCritSect, VERR_INVALID_PARAMETER);
3116	const char pszName = PDMR3CritSectName(pCritSect); / exploited for validation */
3117	AssertReturn(pszName, VERR_INVALID_PARAMETER);
3118	AssertReturn(!pTimer->pCritSect, VERR_ALREADY_EXISTS);
3119	AssertReturn(pTimer->enmState == TMTIMERSTATE_STOPPED, VERR_INVALID_STATE);
3120	AssertReturn( pTimer->enmType == TMTIMERTYPE_DEV
3121	\|\| pTimer->enmType == TMTIMERTYPE_DRV
3122	\|\| pTimer->enmType == TMTIMERTYPE_USB,
3123	VERR_NOT_SUPPORTED); /* Not supported on internal timers, see tmRZTimerGetCritSect. */
3124	LogFlow(("pTimer=%p (%s) pCritSect=%p (%s)\n", pTimer, pTimer->szName, pCritSect, pszName));
3125
3126	pTimer->pCritSect = pCritSect;
3127	return VINF_SUCCESS;
3128	}
3129
3130
3131	/**
3132	* Get the real world UTC time adjusted for VM lag.
3133	*
3134	* @returns pTime.
3135	* @param pVM The cross context VM structure.
3136	* @param pTime Where to store the time.
3137	*/
3138	VMMR3_INT_DECL(PRTTIMESPEC) TMR3UtcNow(PVM pVM, PRTTIMESPEC pTime)
3139	{
3140	/*
3141	* Get a stable set of VirtualSync parameters and calc the lag.
3142	*/
3143	uint64_t offVirtualSync;
3144	uint64_t offVirtualSyncGivenUp;
3145	do
3146	{
3147	offVirtualSync = ASMAtomicReadU64(&pVM->tm.s.offVirtualSync);
3148	offVirtualSyncGivenUp = ASMAtomicReadU64((uint64_t volatile *)&pVM->tm.s.offVirtualSyncGivenUp);
3149	} while (ASMAtomicReadU64(&pVM->tm.s.offVirtualSync) != offVirtualSync);
3150
3151	Assert(offVirtualSync >= offVirtualSyncGivenUp);
3152	uint64_t const offLag = offVirtualSync - offVirtualSyncGivenUp;
3153
3154	/*
3155	* Get current time and adjust for virtual sync lag and do time displacement.
3156	*/
3157	RTTimeNow(pTime);
3158	RTTimeSpecSubNano(pTime, offLag);
3159	RTTimeSpecAddNano(pTime, pVM->tm.s.offUTC);
3160
3161	/*
3162	* Log details if the time changed radically (also triggers on first call).
3163	*/
3164	int64_t nsPrev = ASMAtomicXchgS64(&pVM->tm.s.nsLastUtcNow, RTTimeSpecGetNano(pTime));
3165	int64_t cNsDelta = RTTimeSpecGetNano(pTime) - nsPrev;
3166	if ((uint64_t)RT_ABS(cNsDelta) > RT_NS_1HOUR / 2)
3167	{
3168	RTTIMESPEC NowAgain;
3169	RTTimeNow(&NowAgain);
3170	LogRel(("TMR3UtcNow: nsNow=%'RI64 nsPrev=%'RI64 -> cNsDelta=%'RI64 (offLag=%'RI64 offVirtualSync=%'RU64 offVirtualSyncGivenUp=%'RU64, NowAgain=%'RI64)\n",
3171	RTTimeSpecGetNano(pTime), nsPrev, cNsDelta, offLag, offVirtualSync, offVirtualSyncGivenUp, RTTimeSpecGetNano(&NowAgain)));
3172	if (pVM->tm.s.pszUtcTouchFileOnJump && nsPrev != 0)
3173	{
3174	RTFILE hFile;
3175	int rc = RTFileOpen(&hFile, pVM->tm.s.pszUtcTouchFileOnJump,
3176	RTFILE_O_WRITE \| RTFILE_O_APPEND \| RTFILE_O_OPEN_CREATE \| RTFILE_O_DENY_NONE);
3177	if (RT_SUCCESS(rc))
3178	{
3179	char szMsg[256];
3180	size_t cch;
3181	cch = RTStrPrintf(szMsg, sizeof(szMsg),
3182	"TMR3UtcNow: nsNow=%'RI64 nsPrev=%'RI64 -> cNsDelta=%'RI64 (offLag=%'RI64 offVirtualSync=%'RU64 offVirtualSyncGivenUp=%'RU64, NowAgain=%'RI64)\n",
3183	RTTimeSpecGetNano(pTime), nsPrev, cNsDelta, offLag, offVirtualSync, offVirtualSyncGivenUp, RTTimeSpecGetNano(&NowAgain));
3184	RTFileWrite(hFile, szMsg, cch, NULL);
3185	RTFileClose(hFile);
3186	}
3187	}
3188	}
3189
3190	return pTime;
3191	}
3192
3193
3194	/**
3195	* Pauses all clocks except TMCLOCK_REAL.
3196	*
3197	* @returns VBox status code, all errors are asserted.
3198	* @param pVM The cross context VM structure.
3199	* @param pVCpu The cross context virtual CPU structure.
3200	* @thread EMT corresponding to Pointer to the VMCPU.
3201	*/
3202	VMMR3DECL(int) TMR3NotifySuspend(PVM pVM, PVMCPU pVCpu)
3203	{
3204	VMCPU_ASSERT_EMT(pVCpu);
3205	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED); /* Paranoia: Exploiting the virtual sync lock here. */
3206
3207	/*
3208	* The shared virtual clock (includes virtual sync which is tied to it).
3209	*/
3210	int rc = tmVirtualPauseLocked(pVM);
3211	AssertRCReturnStmt(rc, PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock), rc);
3212
3213	/*
3214	* Pause the TSC last since it is normally linked to the virtual
3215	* sync clock, so the above code may actually stop both clocks.
3216	*/
3217	if (!pVM->tm.s.fTSCTiedToExecution)
3218	{
3219	rc = tmCpuTickPauseLocked(pVM, pVCpu);
3220	AssertRCReturnStmt(rc, PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock), rc);
3221	}
3222
3223	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
3224	/*
3225	* Update cNsTotal and stats.
3226	*/
3227	Assert(!pVCpu->tm.s.fSuspended);
3228	uint64_t const cNsTotalNew = RTTimeNanoTS() - pVCpu->tm.s.nsStartTotal;
3229	uint64_t const cNsOtherNew = cNsTotalNew - pVCpu->tm.s.cNsExecuting - pVCpu->tm.s.cNsHalted;
3230
3231	# if defined(VBOX_WITH_STATISTICS) \|\| defined(VBOX_WITH_NS_ACCOUNTING_STATS)
3232	STAM_REL_COUNTER_ADD(&pVCpu->tm.s.StatNsTotal, cNsTotalNew - pVCpu->tm.s.cNsTotalStat);
3233	int64_t const cNsOtherNewDelta = cNsOtherNew - pVCpu->tm.s.cNsOtherStat;
3234	if (cNsOtherNewDelta > 0)
3235	STAM_REL_COUNTER_ADD(&pVCpu->tm.s.StatNsOther, (uint64_t)cNsOtherNewDelta);
3236	# endif
3237
3238	uint32_t uGen = ASMAtomicIncU32(&pVCpu->tm.s.uTimesGen); Assert(uGen & 1);
3239	pVCpu->tm.s.nsStartTotal = cNsTotalNew;
3240	pVCpu->tm.s.fSuspended = true;
3241	pVCpu->tm.s.cNsTotalStat = cNsTotalNew;
3242	pVCpu->tm.s.cNsOtherStat = cNsOtherNew;
3243	ASMAtomicWriteU32(&pVCpu->tm.s.uTimesGen, (uGen \| 1) + 1);
3244	#endif
3245
3246	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
3247	return VINF_SUCCESS;
3248	}
3249
3250
3251	/**
3252	* Resumes all clocks except TMCLOCK_REAL.
3253	*
3254	* @returns VBox status code, all errors are asserted.
3255	* @param pVM The cross context VM structure.
3256	* @param pVCpu The cross context virtual CPU structure.
3257	* @thread EMT corresponding to Pointer to the VMCPU.
3258	*/
3259	VMMR3DECL(int) TMR3NotifyResume(PVM pVM, PVMCPU pVCpu)
3260	{
3261	VMCPU_ASSERT_EMT(pVCpu);
3262	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED); /* Paranoia: Exploiting the virtual sync lock here. */
3263
3264	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
3265	/*
3266	* Set u64NsTsStartTotal. There is no need to back this out if either of
3267	* the two calls below fail.
3268	*/
3269	uint32_t uGen = ASMAtomicIncU32(&pVCpu->tm.s.uTimesGen); Assert(uGen & 1);
3270	pVCpu->tm.s.nsStartTotal = RTTimeNanoTS() - pVCpu->tm.s.nsStartTotal;
3271	pVCpu->tm.s.fSuspended = false;
3272	ASMAtomicWriteU32(&pVCpu->tm.s.uTimesGen, (uGen \| 1) + 1);
3273	#endif
3274
3275	/*
3276	* Resume the TSC first since it is normally linked to the virtual sync
3277	* clock, so it may actually not be resumed until we've executed the code
3278	* below.
3279	*/
3280	if (!pVM->tm.s.fTSCTiedToExecution)
3281	{
3282	int rc = tmCpuTickResumeLocked(pVM, pVCpu);
3283	AssertRCReturnStmt(rc, PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock), rc);
3284	}
3285
3286	/*
3287	* The shared virtual clock (includes virtual sync which is tied to it).
3288	*/
3289	int rc = tmVirtualResumeLocked(pVM);
3290
3291	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
3292	return rc;
3293	}
3294
3295
3296	/**
3297	* Sets the warp drive percent of the virtual time.
3298	*
3299	* @returns VBox status code.
3300	* @param pUVM The user mode VM structure.
3301	* @param u32Percent The new percentage. 100 means normal operation.
3302	*/
3303	VMMDECL(int) TMR3SetWarpDrive(PUVM pUVM, uint32_t u32Percent)
3304	{
3305	return VMR3ReqPriorityCallWaitU(pUVM, VMCPUID_ANY, (PFNRT)tmR3SetWarpDrive, 2, pUVM, u32Percent);
3306	}
3307
3308
3309	/**
3310	* EMT worker for TMR3SetWarpDrive.
3311	*
3312	* @returns VBox status code.
3313	* @param pUVM The user mode VM handle.
3314	* @param u32Percent See TMR3SetWarpDrive().
3315	* @internal
3316	*/
3317	static DECLCALLBACK(int) tmR3SetWarpDrive(PUVM pUVM, uint32_t u32Percent)
3318	{
3319	PVM pVM = pUVM->pVM;
3320	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
3321	PVMCPU pVCpu = VMMGetCpu(pVM);
3322
3323	/*
3324	* Validate it.
3325	*/
3326	AssertMsgReturn(u32Percent >= 2 && u32Percent <= 20000,
3327	("%RX32 is not between 2 and 20000 (inclusive).\n", u32Percent),
3328	VERR_INVALID_PARAMETER);
3329
3330	/** @todo This isn't a feature specific to virtual time, move the variables to
3331	* TM level and make it affect TMR3UTCNow as well! */
3332
3333	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED); /* Paranoia: Exploiting the virtual sync lock here. */
3334
3335	/*
3336	* If the time is running we'll have to pause it before we can change
3337	* the warp drive settings.
3338	*/
3339	bool fPaused = !!pVM->tm.s.cVirtualTicking;
3340	if (fPaused) /** @todo this isn't really working, but wtf. */
3341	TMR3NotifySuspend(pVM, pVCpu);
3342
3343	/** @todo Should switch TM mode to virt-tsc-emulated if it isn't already! */
3344	pVM->tm.s.u32VirtualWarpDrivePercentage = u32Percent;
3345	pVM->tm.s.fVirtualWarpDrive = u32Percent != 100;
3346	LogRel(("TM: u32VirtualWarpDrivePercentage=%RI32 fVirtualWarpDrive=%RTbool\n",
3347	pVM->tm.s.u32VirtualWarpDrivePercentage, pVM->tm.s.fVirtualWarpDrive));
3348
3349	if (fPaused)
3350	TMR3NotifyResume(pVM, pVCpu);
3351
3352	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
3353	return VINF_SUCCESS;
3354	}
3355
3356
3357	/**
3358	* Gets the current TMCLOCK_VIRTUAL time without checking
3359	* timers or anything.
3360	*
3361	* @returns The timestamp.
3362	* @param pUVM The user mode VM structure.
3363	*
3364	* @remarks See TMVirtualGetNoCheck.
3365	*/
3366	VMMR3DECL(uint64_t) TMR3TimeVirtGet(PUVM pUVM)
3367	{
3368	UVM_ASSERT_VALID_EXT_RETURN(pUVM, UINT64_MAX);
3369	PVM pVM = pUVM->pVM;
3370	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT64_MAX);
3371	return TMVirtualGetNoCheck(pVM);
3372	}
3373
3374
3375	/**
3376	* Gets the current TMCLOCK_VIRTUAL time in milliseconds without checking
3377	* timers or anything.
3378	*
3379	* @returns The timestamp in milliseconds.
3380	* @param pUVM The user mode VM structure.
3381	*
3382	* @remarks See TMVirtualGetNoCheck.
3383	*/
3384	VMMR3DECL(uint64_t) TMR3TimeVirtGetMilli(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 TMVirtualToMilli(pVM, TMVirtualGetNoCheck(pVM));
3390	}
3391
3392
3393	/**
3394	* Gets the current TMCLOCK_VIRTUAL time in microseconds without checking
3395	* timers or anything.
3396	*
3397	* @returns The timestamp in microseconds.
3398	* @param pUVM The user mode VM structure.
3399	*
3400	* @remarks See TMVirtualGetNoCheck.
3401	*/
3402	VMMR3DECL(uint64_t) TMR3TimeVirtGetMicro(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 TMVirtualToMicro(pVM, TMVirtualGetNoCheck(pVM));
3408	}
3409
3410
3411	/**
3412	* Gets the current TMCLOCK_VIRTUAL time in nanoseconds without checking
3413	* timers or anything.
3414	*
3415	* @returns The timestamp in nanoseconds.
3416	* @param pUVM The user mode VM structure.
3417	*
3418	* @remarks See TMVirtualGetNoCheck.
3419	*/
3420	VMMR3DECL(uint64_t) TMR3TimeVirtGetNano(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 TMVirtualToNano(pVM, TMVirtualGetNoCheck(pVM));
3426	}
3427
3428
3429	/**
3430	* Gets the current warp drive percent.
3431	*
3432	* @returns The warp drive percent.
3433	* @param pUVM The user mode VM structure.
3434	*/
3435	VMMR3DECL(uint32_t) TMR3GetWarpDrive(PUVM pUVM)
3436	{
3437	UVM_ASSERT_VALID_EXT_RETURN(pUVM, UINT32_MAX);
3438	PVM pVM = pUVM->pVM;
3439	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT32_MAX);
3440	return pVM->tm.s.u32VirtualWarpDrivePercentage;
3441	}
3442
3443
3444	#if 0 /* unused - needs a little updating after @bugref{9941}*/
3445	/**
3446	* Gets the performance information for one virtual CPU as seen by the VMM.
3447	*
3448	* The returned times covers the period where the VM is running and will be
3449	* reset when restoring a previous VM state (at least for the time being).
3450	*
3451	* @retval VINF_SUCCESS on success.
3452	* @retval VERR_NOT_IMPLEMENTED if not compiled in.
3453	* @retval VERR_INVALID_STATE if the VM handle is bad.
3454	* @retval VERR_INVALID_CPU_ID if idCpu is out of range.
3455	*
3456	* @param pVM The cross context VM structure.
3457	* @param idCpu The ID of the virtual CPU which times to get.
3458	* @param pcNsTotal Where to store the total run time (nano seconds) of
3459	* the CPU, i.e. the sum of the three other returns.
3460	* Optional.
3461	* @param pcNsExecuting Where to store the time (nano seconds) spent
3462	* executing guest code. Optional.
3463	* @param pcNsHalted Where to store the time (nano seconds) spent
3464	* halted. Optional
3465	* @param pcNsOther Where to store the time (nano seconds) spent
3466	* preempted by the host scheduler, on virtualization
3467	* overhead and on other tasks.
3468	*/
3469	VMMR3DECL(int) TMR3GetCpuLoadTimes(PVM pVM, VMCPUID idCpu, uint64_t pcNsTotal, uint64_t pcNsExecuting,
3470	uint64_t pcNsHalted, uint64_t pcNsOther)
3471	{
3472	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_STATE);
3473	AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_CPU_ID);
3474
3475	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
3476	/*
3477	* Get a stable result set.
3478	* This should be way quicker than an EMT request.
3479	*/
3480	PVMCPU pVCpu = pVM->apCpusR3[idCpu];
3481	uint32_t uTimesGen = ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen);
3482	uint64_t cNsTotal = pVCpu->tm.s.cNsTotal;
3483	uint64_t cNsExecuting = pVCpu->tm.s.cNsExecuting;
3484	uint64_t cNsHalted = pVCpu->tm.s.cNsHalted;
3485	uint64_t cNsOther = pVCpu->tm.s.cNsOther;
3486	while ( (uTimesGen & 1) /* update in progress */
3487	\|\| uTimesGen != ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen))
3488	{
3489	RTThreadYield();
3490	uTimesGen = ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen);
3491	cNsTotal = pVCpu->tm.s.cNsTotal;
3492	cNsExecuting = pVCpu->tm.s.cNsExecuting;
3493	cNsHalted = pVCpu->tm.s.cNsHalted;
3494	cNsOther = pVCpu->tm.s.cNsOther;
3495	}
3496
3497	/*
3498	* Fill in the return values.
3499	*/
3500	if (pcNsTotal)
3501	*pcNsTotal = cNsTotal;
3502	if (pcNsExecuting)
3503	*pcNsExecuting = cNsExecuting;
3504	if (pcNsHalted)
3505	*pcNsHalted = cNsHalted;
3506	if (pcNsOther)
3507	*pcNsOther = cNsOther;
3508
3509	return VINF_SUCCESS;
3510
3511	#else
3512	return VERR_NOT_IMPLEMENTED;
3513	#endif
3514	}
3515	#endif /* unused */
3516
3517
3518	/**
3519	* Gets the performance information for one virtual CPU as seen by the VMM in
3520	* percents.
3521	*
3522	* The returned times covers the period where the VM is running and will be
3523	* reset when restoring a previous VM state (at least for the time being).
3524	*
3525	* @retval VINF_SUCCESS on success.
3526	* @retval VERR_NOT_IMPLEMENTED if not compiled in.
3527	* @retval VERR_INVALID_VM_HANDLE if the VM handle is bad.
3528	* @retval VERR_INVALID_CPU_ID if idCpu is out of range.
3529	*
3530	* @param pUVM The usermode VM structure.
3531	* @param idCpu The ID of the virtual CPU which times to get.
3532	* @param pcMsInterval Where to store the interval of the percentages in
3533	* milliseconds. Optional.
3534	* @param pcPctExecuting Where to return the percentage of time spent
3535	* executing guest code. Optional.
3536	* @param pcPctHalted Where to return the percentage of time spent halted.
3537	* Optional
3538	* @param pcPctOther Where to return the percentage of time spent
3539	* preempted by the host scheduler, on virtualization
3540	* overhead and on other tasks.
3541	*/
3542	VMMR3DECL(int) TMR3GetCpuLoadPercents(PUVM pUVM, VMCPUID idCpu, uint64_t pcMsInterval, uint8_t pcPctExecuting,
3543	uint8_t pcPctHalted, uint8_t pcPctOther)
3544	{
3545	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
3546	PVM pVM = pUVM->pVM;
3547	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
3548	AssertReturn(idCpu == VMCPUID_ALL \|\| idCpu < pVM->cCpus, VERR_INVALID_CPU_ID);
3549
3550	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
3551	TMCPULOADSTATE volatile *pState;
3552	if (idCpu == VMCPUID_ALL)
3553	pState = &pVM->tm.s.CpuLoad;
3554	else
3555	pState = &pVM->apCpusR3[idCpu]->tm.s.CpuLoad;
3556
3557	if (pcMsInterval)
3558	*pcMsInterval = RT_MS_1SEC;
3559	if (pcPctExecuting)
3560	*pcPctExecuting = pState->cPctExecuting;
3561	if (pcPctHalted)
3562	*pcPctHalted = pState->cPctHalted;
3563	if (pcPctOther)
3564	*pcPctOther = pState->cPctOther;
3565
3566	return VINF_SUCCESS;
3567
3568	#else
3569	RT_NOREF(pcMsInterval, pcPctExecuting, pcPctHalted, pcPctOther);
3570	return VERR_NOT_IMPLEMENTED;
3571	#endif
3572	}
3573
3574	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
3575
3576	/**
3577	* Helper for tmR3CpuLoadTimer.
3578	*
3579	* @param pState The state to update.
3580	* @param cNsTotal Total time.
3581	* @param cNsExecuting Time executing.
3582	* @param cNsHalted Time halted.
3583	*/
3584	DECLINLINE(void) tmR3CpuLoadTimerMakeUpdate(PTMCPULOADSTATE pState, uint64_t cNsTotal, uint64_t cNsExecuting, uint64_t cNsHalted)
3585	{
3586	/* Calc & update deltas */
3587	uint64_t cNsTotalDelta = cNsTotal - pState->cNsPrevTotal;
3588	uint64_t cNsExecutingDelta = cNsExecuting - pState->cNsPrevExecuting;
3589	uint64_t cNsHaltedDelta = cNsHalted - pState->cNsPrevHalted;
3590
3591	if (cNsExecutingDelta + cNsHaltedDelta <= cNsTotalDelta)
3592	{ /* likely */ }
3593	else
3594	{
3595	/* Just adjust the executing and halted values down to match the total delta. */
3596	uint64_t const cNsExecAndHalted = cNsExecutingDelta + cNsHaltedDelta;
3597	uint64_t const cNsAdjust = cNsExecAndHalted - cNsTotalDelta + cNsTotalDelta / 64;
3598	cNsExecutingDelta -= (cNsAdjust * cNsExecutingDelta + cNsExecAndHalted - 1) / cNsExecAndHalted;
3599	cNsHaltedDelta -= (cNsAdjust * cNsHaltedDelta + cNsExecAndHalted - 1) / cNsExecAndHalted;
3600	/Assert(cNsExecutingDelta + cNsHaltedDelta <= cNsTotalDelta); - annoying when debugging /
3601	}
3602
3603	pState->cNsPrevExecuting = cNsExecuting;
3604	pState->cNsPrevHalted = cNsHalted;
3605	pState->cNsPrevTotal = cNsTotal;
3606
3607	/* Calc pcts. */
3608	uint8_t cPctExecuting, cPctHalted, cPctOther;
3609	if (!cNsTotalDelta)
3610	{
3611	cPctExecuting = 0;
3612	cPctHalted = 100;
3613	cPctOther = 0;
3614	}
3615	else if (cNsTotalDelta < UINT64_MAX / 4)
3616	{
3617	cPctExecuting = (uint8_t)(cNsExecutingDelta * 100 / cNsTotalDelta);
3618	cPctHalted = (uint8_t)(cNsHaltedDelta * 100 / cNsTotalDelta);
3619	cPctOther = (uint8_t)((cNsTotalDelta - cNsExecutingDelta - cNsHaltedDelta) * 100 / cNsTotalDelta);
3620	}
3621	else
3622	{
3623	cPctExecuting = 0;
3624	cPctHalted = 100;
3625	cPctOther = 0;
3626	}
3627
3628	/* Update percentages: */
3629	size_t idxHistory = pState->idxHistory + 1;
3630	if (idxHistory >= RT_ELEMENTS(pState->aHistory))
3631	idxHistory = 0;
3632
3633	pState->cPctExecuting = cPctExecuting;
3634	pState->cPctHalted = cPctHalted;
3635	pState->cPctOther = cPctOther;
3636
3637	pState->aHistory[idxHistory].cPctExecuting = cPctExecuting;
3638	pState->aHistory[idxHistory].cPctHalted = cPctHalted;
3639	pState->aHistory[idxHistory].cPctOther = cPctOther;
3640
3641	pState->idxHistory = (uint16_t)idxHistory;
3642	if (pState->cHistoryEntries < RT_ELEMENTS(pState->aHistory))
3643	pState->cHistoryEntries++;
3644	}
3645
3646
3647	/**
3648	* @callback_method_impl{FNTMTIMERINT,
3649	* Timer callback that calculates the CPU load since the last
3650	* time it was called.}
3651	*/
3652	static DECLCALLBACK(void) tmR3CpuLoadTimer(PVM pVM, TMTIMERHANDLE hTimer, void *pvUser)
3653	{
3654	/*
3655	* Re-arm the timer first.
3656	*/
3657	int rc = TMTimerSetMillies(pVM, hTimer, 1000);
3658	AssertLogRelRC(rc);
3659	NOREF(pvUser);
3660
3661	/*
3662	* Update the values for each CPU.
3663	*/
3664	uint64_t cNsTotalAll = 0;
3665	uint64_t cNsExecutingAll = 0;
3666	uint64_t cNsHaltedAll = 0;
3667	for (VMCPUID iCpu = 0; iCpu < pVM->cCpus; iCpu++)
3668	{
3669	PVMCPU pVCpu = pVM->apCpusR3[iCpu];
3670
3671	/* Try get a stable data set. */
3672	uint32_t cTries = 3;
3673	uint64_t nsNow = RTTimeNanoTS();
3674	uint32_t uTimesGen = ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen);
3675	bool fSuspended = pVCpu->tm.s.fSuspended;
3676	uint64_t nsStartTotal = pVCpu->tm.s.nsStartTotal;
3677	uint64_t cNsExecuting = pVCpu->tm.s.cNsExecuting;
3678	uint64_t cNsHalted = pVCpu->tm.s.cNsHalted;
3679	while (RT_UNLIKELY( (uTimesGen & 1) /* update in progress */
3680	\|\| uTimesGen != ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen)))
3681	{
3682	if (!--cTries)
3683	break;
3684	ASMNopPause();
3685	nsNow = RTTimeNanoTS();
3686	uTimesGen = ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen);
3687	fSuspended = pVCpu->tm.s.fSuspended;
3688	nsStartTotal = pVCpu->tm.s.nsStartTotal;
3689	cNsExecuting = pVCpu->tm.s.cNsExecuting;
3690	cNsHalted = pVCpu->tm.s.cNsHalted;
3691	}
3692
3693	/* Totals */
3694	uint64_t cNsTotal = fSuspended ? nsStartTotal : nsNow - nsStartTotal;
3695	cNsTotalAll += cNsTotal;
3696	cNsExecutingAll += cNsExecuting;
3697	cNsHaltedAll += cNsHalted;
3698
3699	/* Calc the PCTs and update the state. */
3700	tmR3CpuLoadTimerMakeUpdate(&pVCpu->tm.s.CpuLoad, cNsTotal, cNsExecuting, cNsHalted);
3701
3702	/* Tell the VCpu to update the other and total stat members. */
3703	ASMAtomicWriteBool(&pVCpu->tm.s.fUpdateStats, true);
3704	}
3705
3706	/*
3707	* Update the value for all the CPUs.
3708	*/
3709	tmR3CpuLoadTimerMakeUpdate(&pVM->tm.s.CpuLoad, cNsTotalAll, cNsExecutingAll, cNsHaltedAll);
3710
3711	}
3712
3713	#endif /* !VBOX_WITHOUT_NS_ACCOUNTING */
3714
3715
3716	/**
3717	* @callback_method_impl{PFNVMMEMTRENDEZVOUS,
3718	* Worker for TMR3CpuTickParavirtEnable}
3719	*/
3720	static DECLCALLBACK(VBOXSTRICTRC) tmR3CpuTickParavirtEnable(PVM pVM, PVMCPU pVCpuEmt, void *pvData)
3721	{
3722	AssertPtr(pVM); Assert(pVM->tm.s.fTSCModeSwitchAllowed); NOREF(pVCpuEmt); NOREF(pvData);
3723	Assert(pVM->tm.s.enmTSCMode != TMTSCMODE_NATIVE_API); /** @todo figure out NEM/win and paravirt */
3724	Assert(tmR3HasFixedTSC(pVM));
3725
3726	if (pVM->tm.s.enmTSCMode != TMTSCMODE_REAL_TSC_OFFSET)
3727	{
3728	/*
3729	* The return value of TMCpuTickGet() and the guest's TSC value for each
3730	* CPU must remain constant across the TM TSC mode-switch. Thus we have
3731	* the following equation (new/old signifies the new/old tsc modes):
3732	* uNewTsc = uOldTsc
3733	*
3734	* Where (see tmCpuTickGetInternal):
3735	* uOldTsc = uRawOldTsc - offTscRawSrcOld
3736	* uNewTsc = uRawNewTsc - offTscRawSrcNew
3737	*
3738	* Solve it for offTscRawSrcNew without replacing uOldTsc:
3739	* uRawNewTsc - offTscRawSrcNew = uOldTsc
3740	* => -offTscRawSrcNew = uOldTsc - uRawNewTsc
3741	* => offTscRawSrcNew = uRawNewTsc - uOldTsc
3742	*/
3743	uint64_t uRawOldTsc = tmR3CpuTickGetRawVirtualNoCheck(pVM);
3744	uint64_t uRawNewTsc = SUPReadTsc();
3745	uint32_t cCpus = pVM->cCpus;
3746	for (uint32_t i = 0; i < cCpus; i++)
3747	{
3748	PVMCPU pVCpu = pVM->apCpusR3[i];
3749	uint64_t uOldTsc = uRawOldTsc - pVCpu->tm.s.offTSCRawSrc;
3750	pVCpu->tm.s.offTSCRawSrc = uRawNewTsc - uOldTsc;
3751	Assert(uRawNewTsc - pVCpu->tm.s.offTSCRawSrc >= uOldTsc); /* paranoia^256 */
3752	}
3753
3754	LogRel(("TM: Switching TSC mode from '%s' to '%s'\n", tmR3GetTSCModeNameEx(pVM->tm.s.enmTSCMode),
3755	tmR3GetTSCModeNameEx(TMTSCMODE_REAL_TSC_OFFSET)));
3756	pVM->tm.s.enmTSCMode = TMTSCMODE_REAL_TSC_OFFSET;
3757	}
3758	return VINF_SUCCESS;
3759	}
3760
3761
3762	/**
3763	* Notify TM that the guest has enabled usage of a paravirtualized TSC.
3764	*
3765	* This may perform a EMT rendezvous and change the TSC virtualization mode.
3766	*
3767	* @returns VBox status code.
3768	* @param pVM The cross context VM structure.
3769	*/
3770	VMMR3_INT_DECL(int) TMR3CpuTickParavirtEnable(PVM pVM)
3771	{
3772	int rc = VINF_SUCCESS;
3773	if (pVM->tm.s.fTSCModeSwitchAllowed)
3774	rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, tmR3CpuTickParavirtEnable, NULL);
3775	else
3776	LogRel(("TM: Host/VM is not suitable for using TSC mode '%s', request to change TSC mode ignored\n",
3777	tmR3GetTSCModeNameEx(TMTSCMODE_REAL_TSC_OFFSET)));
3778	pVM->tm.s.fParavirtTscEnabled = true;
3779	return rc;
3780	}
3781
3782
3783	/**
3784	* @callback_method_impl{PFNVMMEMTRENDEZVOUS,
3785	* Worker for TMR3CpuTickParavirtDisable}
3786	*/
3787	static DECLCALLBACK(VBOXSTRICTRC) tmR3CpuTickParavirtDisable(PVM pVM, PVMCPU pVCpuEmt, void *pvData)
3788	{
3789	AssertPtr(pVM); Assert(pVM->tm.s.fTSCModeSwitchAllowed); NOREF(pVCpuEmt);
3790	RT_NOREF1(pvData);
3791
3792	if ( pVM->tm.s.enmTSCMode == TMTSCMODE_REAL_TSC_OFFSET
3793	&& pVM->tm.s.enmTSCMode != pVM->tm.s.enmOriginalTSCMode)
3794	{
3795	/*
3796	* See tmR3CpuTickParavirtEnable for an explanation of the conversion math.
3797	*/
3798	uint64_t uRawOldTsc = SUPReadTsc();
3799	uint64_t uRawNewTsc = tmR3CpuTickGetRawVirtualNoCheck(pVM);
3800	uint32_t cCpus = pVM->cCpus;
3801	for (uint32_t i = 0; i < cCpus; i++)
3802	{
3803	PVMCPU pVCpu = pVM->apCpusR3[i];
3804	uint64_t uOldTsc = uRawOldTsc - pVCpu->tm.s.offTSCRawSrc;
3805	pVCpu->tm.s.offTSCRawSrc = uRawNewTsc - uOldTsc;
3806	Assert(uRawNewTsc - pVCpu->tm.s.offTSCRawSrc >= uOldTsc); /* paranoia^256 */
3807
3808	/* Update the last-seen tick here as we havent't been updating it (as we don't
3809	need it) while in pure TSC-offsetting mode. */
3810	pVCpu->tm.s.u64TSCLastSeen = uOldTsc;
3811	}
3812
3813	LogRel(("TM: Switching TSC mode from '%s' to '%s'\n", tmR3GetTSCModeNameEx(pVM->tm.s.enmTSCMode),
3814	tmR3GetTSCModeNameEx(pVM->tm.s.enmOriginalTSCMode)));
3815	pVM->tm.s.enmTSCMode = pVM->tm.s.enmOriginalTSCMode;
3816	}
3817	return VINF_SUCCESS;
3818	}
3819
3820
3821	/**
3822	* Notify TM that the guest has disabled usage of a paravirtualized TSC.
3823	*
3824	* If TMR3CpuTickParavirtEnable() changed the TSC virtualization mode, this will
3825	* perform an EMT rendezvous to revert those changes.
3826	*
3827	* @returns VBox status code.
3828	* @param pVM The cross context VM structure.
3829	*/
3830	VMMR3_INT_DECL(int) TMR3CpuTickParavirtDisable(PVM pVM)
3831	{
3832	int rc = VINF_SUCCESS;
3833	if (pVM->tm.s.fTSCModeSwitchAllowed)
3834	rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, tmR3CpuTickParavirtDisable, NULL);
3835	pVM->tm.s.fParavirtTscEnabled = false;
3836	return rc;
3837	}
3838
3839
3840	/**
3841	* Check whether the guest can be presented a fixed rate & monotonic TSC.
3842	*
3843	* @returns true if TSC is stable, false otherwise.
3844	* @param pVM The cross context VM structure.
3845	* @param fWithParavirtEnabled Whether it's fixed & monotonic when
3846	* paravirt. TSC is enabled or not.
3847	*
3848	* @remarks Must be called only after TMR3InitFinalize().
3849	*/
3850	VMMR3_INT_DECL(bool) TMR3CpuTickIsFixedRateMonotonic(PVM pVM, bool fWithParavirtEnabled)
3851	{
3852	/** @todo figure out what exactly we want here later. */
3853	NOREF(fWithParavirtEnabled);
3854	PSUPGLOBALINFOPAGE pGip;
3855	return tmR3HasFixedTSC(pVM) /* Host has fixed-rate TSC. */
3856	&& ( (pGip = g_pSUPGlobalInfoPage) == NULL /* Can be NULL in driverless mode. */
3857	\|\| (pGip->u32Mode != SUPGIPMODE_ASYNC_TSC)); /* GIP thinks it's monotonic. */
3858	}
3859
3860
3861	/**
3862	* Gets the 5 char clock name for the info tables.
3863	*
3864	* @returns The name.
3865	* @param enmClock The clock.
3866	*/
3867	DECLINLINE(const char *) tmR3Get5CharClockName(TMCLOCK enmClock)
3868	{
3869	switch (enmClock)
3870	{
3871	case TMCLOCK_REAL: return "Real ";
3872	case TMCLOCK_VIRTUAL: return "Virt ";
3873	case TMCLOCK_VIRTUAL_SYNC: return "VrSy ";
3874	case TMCLOCK_TSC: return "TSC ";
3875	default: return "Bad ";
3876	}
3877	}
3878
3879
3880	/**
3881	* Display all timers.
3882	*
3883	* @param pVM The cross context VM structure.
3884	* @param pHlp The info helpers.
3885	* @param pszArgs Arguments, ignored.
3886	*/
3887	static DECLCALLBACK(void) tmR3TimerInfo(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
3888	{
3889	NOREF(pszArgs);
3890	pHlp->pfnPrintf(pHlp,
3891	"Timers (pVM=%p)\n"
3892	"%.s %.s %.s %.s Clock %18s %18s %6s %-25s Description\n",
3893	pVM,
3894	sizeof(RTR3PTR) * 2, "pTimerR3 ",
3895	sizeof(int32_t) * 2, "offNext ",
3896	sizeof(int32_t) * 2, "offPrev ",
3897	sizeof(int32_t) * 2, "offSched ",
3898	"Time",
3899	"Expire",
3900	"HzHint",
3901	"State");
3902	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
3903	{
3904	PTMTIMERQUEUE const pQueue = &pVM->tm.s.aTimerQueues[idxQueue];
3905	const char * const pszClock = tmR3Get5CharClockName(pQueue->enmClock);
3906	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
3907	for (uint32_t idxTimer = 0; idxTimer < pQueue->cTimersAlloc; idxTimer++)
3908	{
3909	PTMTIMER pTimer = &pQueue->paTimers[idxTimer];
3910	TMTIMERSTATE enmState = pTimer->enmState;
3911	if (enmState < TMTIMERSTATE_DESTROY && enmState > TMTIMERSTATE_INVALID)
3912	pHlp->pfnPrintf(pHlp,
3913	"%p %08RX32 %08RX32 %08RX32 %s %18RU64 %18RU64 %6RU32 %-25s %s\n",
3914	pTimer,
3915	pTimer->idxNext,
3916	pTimer->idxPrev,
3917	pTimer->idxScheduleNext,
3918	pszClock,
3919	TMTimerGet(pVM, pTimer->hSelf),
3920	pTimer->u64Expire,
3921	pTimer->uHzHint,
3922	tmTimerState(enmState),
3923	pTimer->szName);
3924	}
3925	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
3926	}
3927	}
3928
3929
3930	/**
3931	* Display all active timers.
3932	*
3933	* @param pVM The cross context VM structure.
3934	* @param pHlp The info helpers.
3935	* @param pszArgs Arguments, ignored.
3936	*/
3937	static DECLCALLBACK(void) tmR3TimerInfoActive(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
3938	{
3939	NOREF(pszArgs);
3940	pHlp->pfnPrintf(pHlp,
3941	"Active Timers (pVM=%p)\n"
3942	"%.s %.s %.s %.s Clock %18s %18s %6s %-25s Description\n",
3943	pVM,
3944	sizeof(RTR3PTR) * 2, "pTimerR3 ",
3945	sizeof(int32_t) * 2, "offNext ",
3946	sizeof(int32_t) * 2, "offPrev ",
3947	sizeof(int32_t) * 2, "offSched ",
3948	"Time",
3949	"Expire",
3950	"HzHint",
3951	"State");
3952	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
3953	{
3954	PTMTIMERQUEUE const pQueue = &pVM->tm.s.aTimerQueues[idxQueue];
3955	const char * const pszClock = tmR3Get5CharClockName(pQueue->enmClock);
3956	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
3957	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
3958
3959	for (PTMTIMERR3 pTimer = tmTimerQueueGetHead(pQueue, pQueue);
3960	pTimer;
3961	pTimer = tmTimerGetNext(pQueue, pTimer))
3962	{
3963	pHlp->pfnPrintf(pHlp,
3964	"%p %08RX32 %08RX32 %08RX32 %s %18RU64 %18RU64 %6RU32 %-25s %s\n",
3965	pTimer,
3966	pTimer->idxNext,
3967	pTimer->idxPrev,
3968	pTimer->idxScheduleNext,
3969	pszClock,
3970	TMTimerGet(pVM, pTimer->hSelf),
3971	pTimer->u64Expire,
3972	pTimer->uHzHint,
3973	tmTimerState(pTimer->enmState),
3974	pTimer->szName);
3975	}
3976
3977	PDMCritSectLeave(pVM, &pQueue->TimerLock);
3978	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
3979	}
3980	}
3981
3982
3983	/**
3984	* Display all clocks.
3985	*
3986	* @param pVM The cross context VM structure.
3987	* @param pHlp The info helpers.
3988	* @param pszArgs Arguments, ignored.
3989	*/
3990	static DECLCALLBACK(void) tmR3InfoClocks(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
3991	{
3992	NOREF(pszArgs);
3993
3994	/*
3995	* Read the times first to avoid more than necessary time variation.
3996	*/
3997	const uint64_t u64Virtual = TMVirtualGet(pVM);
3998	const uint64_t u64VirtualSync = TMVirtualSyncGet(pVM);
3999	const uint64_t u64Real = TMRealGet(pVM);
4000
4001	for (VMCPUID i = 0; i < pVM->cCpus; i++)
4002	{
4003	PVMCPU pVCpu = pVM->apCpusR3[i];
4004	uint64_t u64TSC = TMCpuTickGet(pVCpu);
4005
4006	/*
4007	* TSC
4008	*/
4009	pHlp->pfnPrintf(pHlp,
4010	"Cpu Tick: %18RU64 (%#016RX64) %RU64Hz %s - virtualized",
4011	u64TSC, u64TSC, TMCpuTicksPerSecond(pVM),
4012	pVCpu->tm.s.fTSCTicking ? "ticking" : "paused");
4013	if (pVM->tm.s.enmTSCMode == TMTSCMODE_REAL_TSC_OFFSET)
4014	{
4015	pHlp->pfnPrintf(pHlp, " - real tsc offset");
4016	if (pVCpu->tm.s.offTSCRawSrc)
4017	pHlp->pfnPrintf(pHlp, "\n offset %RU64", pVCpu->tm.s.offTSCRawSrc);
4018	}
4019	else if (pVM->tm.s.enmTSCMode == TMTSCMODE_NATIVE_API)
4020	pHlp->pfnPrintf(pHlp, " - native api");
4021	else
4022	pHlp->pfnPrintf(pHlp, " - virtual clock");
4023	pHlp->pfnPrintf(pHlp, "\n");
4024	}
4025
4026	/*
4027	* virtual
4028	*/
4029	pHlp->pfnPrintf(pHlp,
4030	" Virtual: %18RU64 (%#016RX64) %RU64Hz %s",
4031	u64Virtual, u64Virtual, TMVirtualGetFreq(pVM),
4032	pVM->tm.s.cVirtualTicking ? "ticking" : "paused");
4033	if (pVM->tm.s.fVirtualWarpDrive)
4034	pHlp->pfnPrintf(pHlp, " WarpDrive %RU32 %%", pVM->tm.s.u32VirtualWarpDrivePercentage);
4035	pHlp->pfnPrintf(pHlp, "\n");
4036
4037	/*
4038	* virtual sync
4039	*/
4040	pHlp->pfnPrintf(pHlp,
4041	"VirtSync: %18RU64 (%#016RX64) %s%s",
4042	u64VirtualSync, u64VirtualSync,
4043	pVM->tm.s.fVirtualSyncTicking ? "ticking" : "paused",
4044	pVM->tm.s.fVirtualSyncCatchUp ? " - catchup" : "");
4045	if (pVM->tm.s.offVirtualSync)
4046	{
4047	pHlp->pfnPrintf(pHlp, "\n offset %RU64", pVM->tm.s.offVirtualSync);
4048	if (pVM->tm.s.u32VirtualSyncCatchUpPercentage)
4049	pHlp->pfnPrintf(pHlp, " catch-up rate %u %%", pVM->tm.s.u32VirtualSyncCatchUpPercentage);
4050	}
4051	pHlp->pfnPrintf(pHlp, "\n");
4052
4053	/*
4054	* real
4055	*/
4056	pHlp->pfnPrintf(pHlp,
4057	" Real: %18RU64 (%#016RX64) %RU64Hz\n",
4058	u64Real, u64Real, TMRealGetFreq(pVM));
4059	}
4060
4061
4062	/**
4063	* Helper for tmR3InfoCpuLoad that adjust @a uPct to the given graph width.
4064	*/
4065	DECLINLINE(size_t) tmR3InfoCpuLoadAdjustWidth(size_t uPct, size_t cchWidth)
4066	{
4067	if (cchWidth != 100)
4068	uPct = (size_t)(((double)uPct + 0.5) * ((double)cchWidth / 100.0));
4069	return uPct;
4070	}
4071
4072
4073	/**
4074	* @callback_method_impl{FNDBGFINFOARGVINT}
4075	*/
4076	static DECLCALLBACK(void) tmR3InfoCpuLoad(PVM pVM, PCDBGFINFOHLP pHlp, int cArgs, char **papszArgs)
4077	{
4078	char szTmp[1024];
4079
4080	/*
4081	* Parse arguments.
4082	*/
4083	PTMCPULOADSTATE pState = &pVM->tm.s.CpuLoad;
4084	VMCPUID idCpu = 0;
4085	bool fAllCpus = true;
4086	bool fExpGraph = true;
4087	uint32_t cchWidth = 80;
4088	uint32_t cPeriods = RT_ELEMENTS(pState->aHistory);
4089	uint32_t cRows = 60;
4090
4091	static const RTGETOPTDEF s_aOptions[] =
4092	{
4093	{ "all", 'a', RTGETOPT_REQ_NOTHING },
4094	{ "cpu", 'c', RTGETOPT_REQ_UINT32 },
4095	{ "periods", 'p', RTGETOPT_REQ_UINT32 },
4096	{ "rows", 'r', RTGETOPT_REQ_UINT32 },
4097	{ "uni", 'u', RTGETOPT_REQ_NOTHING },
4098	{ "uniform", 'u', RTGETOPT_REQ_NOTHING },
4099	{ "width", 'w', RTGETOPT_REQ_UINT32 },
4100	{ "exp", 'x', RTGETOPT_REQ_NOTHING },
4101	{ "exponential", 'x', RTGETOPT_REQ_NOTHING },
4102	};
4103
4104	RTGETOPTSTATE State;
4105	int rc = RTGetOptInit(&State, cArgs, papszArgs, s_aOptions, RT_ELEMENTS(s_aOptions), 0, 0 /fFlags/);
4106	AssertRC(rc);
4107
4108	RTGETOPTUNION ValueUnion;
4109	while ((rc = RTGetOpt(&State, &ValueUnion)) != 0)
4110	{
4111	switch (rc)
4112	{
4113	case 'a':
4114	pState = &pVM->apCpusR3[0]->tm.s.CpuLoad;
4115	idCpu = 0;
4116	fAllCpus = true;
4117	break;
4118	case 'c':
4119	if (ValueUnion.u32 < pVM->cCpus)
4120	{
4121	pState = &pVM->apCpusR3[ValueUnion.u32]->tm.s.CpuLoad;
4122	idCpu = ValueUnion.u32;
4123	}
4124	else
4125	{
4126	pState = &pVM->tm.s.CpuLoad;
4127	idCpu = VMCPUID_ALL;
4128	}
4129	fAllCpus = false;
4130	break;
4131	case 'p':
4132	cPeriods = RT_MIN(RT_MAX(ValueUnion.u32, 1), RT_ELEMENTS(pState->aHistory));
4133	break;
4134	case 'r':
4135	cRows = RT_MIN(RT_MAX(ValueUnion.u32, 5), RT_ELEMENTS(pState->aHistory));
4136	break;
4137	case 'w':
4138	cchWidth = RT_MIN(RT_MAX(ValueUnion.u32, 10), sizeof(szTmp) - 32);
4139	break;
4140	case 'x':
4141	fExpGraph = true;
4142	break;
4143	case 'u':
4144	fExpGraph = false;
4145	break;
4146	case 'h':
4147	pHlp->pfnPrintf(pHlp,
4148	"Usage: cpuload [parameters]\n"
4149	" all, -a\n"
4150	" Show statistics for all CPUs. (default)\n"
4151	" cpu=id, -c id\n"
4152	" Show statistics for the specified CPU ID. Show combined stats if out of range.\n"
4153	" periods=count, -p count\n"
4154	" Number of periods to show. Default: all\n"
4155	" rows=count, -r count\n"
4156	" Number of rows in the graphs. Default: 60\n"
4157	" width=count, -w count\n"
4158	" Core graph width in characters. Default: 80\n"
4159	" exp, exponential, -e\n"
4160	" Do 1:1 for more recent half / 30 seconds of the graph, combine the\n"
4161	" rest into increasinly larger chunks. Default.\n"
4162	" uniform, uni, -u\n"
4163	" Combine periods into rows in a uniform manner for the whole graph.\n");
4164	return;
4165	default:
4166	pHlp->pfnGetOptError(pHlp, rc, &ValueUnion, &State);
4167	return;
4168	}
4169	}
4170
4171	/*
4172	* Do the job.
4173	*/
4174	for (;;)
4175	{
4176	uint32_t const cMaxPeriods = pState->cHistoryEntries;
4177	if (cPeriods > cMaxPeriods)
4178	cPeriods = cMaxPeriods;
4179	if (cPeriods > 0)
4180	{
4181	if (fAllCpus)
4182	{
4183	if (idCpu > 0)
4184	pHlp->pfnPrintf(pHlp, "\n");
4185	pHlp->pfnPrintf(pHlp, " CPU load for virtual CPU %#04x\n"
4186	" -------------------------------\n", idCpu);
4187	}
4188
4189	/*
4190	* Figure number of periods per chunk. We can either do this in a linear
4191	* fashion or a exponential fashion that compresses old history more.
4192	*/
4193	size_t cPerRowDecrement = 0;
4194	size_t cPeriodsPerRow = 1;
4195	if (cRows < cPeriods)
4196	{
4197	if (!fExpGraph)
4198	cPeriodsPerRow = (cPeriods + cRows / 2) / cRows;
4199	else
4200	{
4201	/* The last 30 seconds or half of the rows are 1:1, the other part
4202	is in increasing period counts. Code is a little simple but seems
4203	to do the job most of the time, which is all I have time now. */
4204	size_t cPeriodsOneToOne = RT_MIN(30, cRows / 2);
4205	size_t cRestRows = cRows - cPeriodsOneToOne;
4206	size_t cRestPeriods = cPeriods - cPeriodsOneToOne;
4207
4208	size_t cPeriodsInWindow = 0;
4209	for (cPeriodsPerRow = 0; cPeriodsPerRow <= cRestRows && cPeriodsInWindow < cRestPeriods; cPeriodsPerRow++)
4210	cPeriodsInWindow += cPeriodsPerRow + 1;
4211
4212	size_t iLower = 1;
4213	while (cPeriodsInWindow < cRestPeriods)
4214	{
4215	cPeriodsPerRow++;
4216	cPeriodsInWindow += cPeriodsPerRow;
4217	cPeriodsInWindow -= iLower;
4218	iLower++;
4219	}
4220
4221	cPerRowDecrement = 1;
4222	}
4223	}
4224
4225	/*
4226	* Do the work.
4227	*/
4228	size_t cPctExecuting = 0;
4229	size_t cPctOther = 0;
4230	size_t cPeriodsAccumulated = 0;
4231
4232	size_t cRowsLeft = cRows;
4233	size_t iHistory = (pState->idxHistory - cPeriods) % RT_ELEMENTS(pState->aHistory);
4234	while (cPeriods-- > 0)
4235	{
4236	iHistory++;
4237	if (iHistory >= RT_ELEMENTS(pState->aHistory))
4238	iHistory = 0;
4239
4240	cPctExecuting += pState->aHistory[iHistory].cPctExecuting;
4241	cPctOther += pState->aHistory[iHistory].cPctOther;
4242	cPeriodsAccumulated += 1;
4243	if ( cPeriodsAccumulated >= cPeriodsPerRow
4244	\|\| cPeriods < cRowsLeft)
4245	{
4246	/*
4247	* Format and output the line.
4248	*/
4249	size_t offTmp = 0;
4250	size_t i = tmR3InfoCpuLoadAdjustWidth(cPctExecuting / cPeriodsAccumulated, cchWidth);
4251	while (i-- > 0)
4252	szTmp[offTmp++] = '#';
4253	i = tmR3InfoCpuLoadAdjustWidth(cPctOther / cPeriodsAccumulated, cchWidth);
4254	while (i-- > 0)
4255	szTmp[offTmp++] = 'O';
4256	szTmp[offTmp] = '\0';
4257
4258	cRowsLeft--;
4259	pHlp->pfnPrintf(pHlp, "%3zus: %s\n", cPeriods + cPeriodsAccumulated / 2, szTmp);
4260
4261	/* Reset the state: */
4262	cPctExecuting = 0;
4263	cPctOther = 0;
4264	cPeriodsAccumulated = 0;
4265	if (cPeriodsPerRow > cPerRowDecrement)
4266	cPeriodsPerRow -= cPerRowDecrement;
4267	}
4268	}
4269	pHlp->pfnPrintf(pHlp, " (#=guest, O=VMM overhead) idCpu=%#x\n", idCpu);
4270
4271	}
4272	else
4273	pHlp->pfnPrintf(pHlp, "No load data.\n");
4274
4275	/*
4276	* Next CPU if we're display all.
4277	*/
4278	if (!fAllCpus)
4279	break;
4280	idCpu++;
4281	if (idCpu >= pVM->cCpus)
4282	break;
4283	pState = &pVM->apCpusR3[idCpu]->tm.s.CpuLoad;
4284	}
4285
4286	}
4287
4288
4289	/**
4290	* Gets the descriptive TM TSC mode name given the enum value.
4291	*
4292	* @returns The name.
4293	* @param enmMode The mode to name.
4294	*/
4295	static const char *tmR3GetTSCModeNameEx(TMTSCMODE enmMode)
4296	{
4297	switch (enmMode)
4298	{
4299	case TMTSCMODE_REAL_TSC_OFFSET: return "RealTSCOffset";
4300	case TMTSCMODE_VIRT_TSC_EMULATED: return "VirtTSCEmulated";
4301	case TMTSCMODE_DYNAMIC: return "Dynamic";
4302	case TMTSCMODE_NATIVE_API: return "NativeApi";
4303	default: return "???";
4304	}
4305	}
4306
4307
4308	/**
4309	* Gets the descriptive TM TSC mode name.
4310	*
4311	* @returns The name.
4312	* @param pVM The cross context VM structure.
4313	*/
4314	static const char *tmR3GetTSCModeName(PVM pVM)
4315	{
4316	Assert(pVM);
4317	return tmR3GetTSCModeNameEx(pVM->tm.s.enmTSCMode);
4318	}
4319

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source: vbox/trunk/src/VBox/VMM/VMMR3/TM.cpp@ 102828

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