TM.cpp@ 93015

Last change on this file since 93015 was 92720, checked in by vboxsync, 3 years ago
VMM/TM: Driverless adjustments for init complete code. bugref:10138
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1	/* $Id: TM.cpp 92720 2021-12-02 22:41:09Z vboxsync $ */
2	/** @file
3	* TM - Time Manager.
4	*/
5
6	/*
7	* Copyright (C) 2006-2020 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18	/** @page pg_tm TM - The Time Manager
19	*
20	* The Time Manager abstracts the CPU clocks and manages timers used by the VMM,
21	* device and drivers.
22	*
23	* @see grp_tm
24	*
25	*
26	* @section sec_tm_clocks Clocks
27	*
28	* There are currently 4 clocks:
29	* - Virtual (guest).
30	* - Synchronous virtual (guest).
31	* - CPU Tick (TSC) (guest). Only current use is rdtsc emulation. Usually a
32	* function of the virtual clock.
33	* - Real (host). This is only used for display updates atm.
34	*
35	* The most important clocks are the three first ones and of these the second is
36	* the most interesting.
37	*
38	*
39	* The synchronous virtual clock is tied to the virtual clock except that it
40	* will take into account timer delivery lag caused by host scheduling. It will
41	* normally never advance beyond the head timer, and when lagging too far behind
42	* it will gradually speed up to catch up with the virtual clock. All devices
43	* implementing time sources accessible to and used by the guest is using this
44	* clock (for timers and other things). This ensures consistency between the
45	* time sources.
46	*
47	* The virtual clock is implemented as an offset to a monotonic, high
48	* resolution, wall clock. The current time source is using the RTTimeNanoTS()
49	* machinery based upon the Global Info Pages (GIP), that is, we're using TSC
50	* deltas (usually 10 ms) to fill the gaps between GIP updates. The result is
51	* a fairly high res clock that works in all contexts and on all hosts. The
52	* virtual clock is paused when the VM isn't in the running state.
53	*
54	* The CPU tick (TSC) is normally virtualized as a function of the synchronous
55	* virtual clock, where the frequency defaults to the host cpu frequency (as we
56	* measure it). In this mode it is possible to configure the frequency. Another
57	* (non-default) option is to use the raw unmodified host TSC values. And yet
58	* another, to tie it to time spent executing guest code. All these things are
59	* configurable should non-default behavior be desirable.
60	*
61	* The real clock is a monotonic clock (when available) with relatively low
62	* resolution, though this a bit host specific. Note that we're currently not
63	* servicing timers using the real clock when the VM is not running, this is
64	* simply because it has not been needed yet therefore not implemented.
65	*
66	*
67	* @subsection subsec_tm_timesync Guest Time Sync / UTC time
68	*
69	* Guest time syncing is primarily taken care of by the VMM device. The
70	* principle is very simple, the guest additions periodically asks the VMM
71	* device what the current UTC time is and makes adjustments accordingly.
72	*
73	* A complicating factor is that the synchronous virtual clock might be doing
74	* catchups and the guest perception is currently a little bit behind the world
75	* but it will (hopefully) be catching up soon as we're feeding timer interrupts
76	* at a slightly higher rate. Adjusting the guest clock to the current wall
77	* time in the real world would be a bad idea then because the guest will be
78	* advancing too fast and run ahead of world time (if the catchup works out).
79	* To solve this problem TM provides the VMM device with an UTC time source that
80	* gets adjusted with the current lag, so that when the guest eventually catches
81	* up the lag it will be showing correct real world time.
82	*
83	*
84	* @section sec_tm_timers Timers
85	*
86	* The timers can use any of the TM clocks described in the previous section.
87	* Each clock has its own scheduling facility, or timer queue if you like.
88	* There are a few factors which makes it a bit complex. First, there is the
89	* usual R0 vs R3 vs. RC thing. Then there are multiple threads, and then there
90	* is the timer thread that periodically checks whether any timers has expired
91	* without EMT noticing. On the API level, all but the create and save APIs
92	* must be multithreaded. EMT will always run the timers.
93	*
94	* The design is using a doubly linked list of active timers which is ordered
95	* by expire date. This list is only modified by the EMT thread. Updates to
96	* the list are batched in a singly linked list, which is then processed by the
97	* EMT thread at the first opportunity (immediately, next time EMT modifies a
98	* timer on that clock, or next timer timeout). Both lists are offset based and
99	* all the elements are therefore allocated from the hyper heap.
100	*
101	* For figuring out when there is need to schedule and run timers TM will:
102	* - Poll whenever somebody queries the virtual clock.
103	* - Poll the virtual clocks from the EM and REM loops.
104	* - Poll the virtual clocks from trap exit path.
105	* - Poll the virtual clocks and calculate first timeout from the halt loop.
106	* - Employ a thread which periodically (100Hz) polls all the timer queues.
107	*
108	*
109	* @image html TMTIMER-Statechart-Diagram.gif
110	*
111	* @section sec_tm_timer Logging
112	*
113	* Level 2: Logs a most of the timer state transitions and queue servicing.
114	* Level 3: Logs a few oddments.
115	* Level 4: Logs TMCLOCK_VIRTUAL_SYNC catch-up events.
116	*
117	*/
118
119
120	/*********************************************************************************************************************************
121	* Header Files *
122	*********************************************************************************************************************************/
123	#define LOG_GROUP LOG_GROUP_TM
124	#ifdef DEBUG_bird
125	# define DBGFTRACE_DISABLED /* annoying */
126	#endif
127	#include <VBox/vmm/tm.h>
128	#include <iprt/asm-amd64-x86.h> /* for SUPGetCpuHzFromGip from sup.h */
129	#include <VBox/vmm/vmm.h>
130	#include <VBox/vmm/mm.h>
131	#include <VBox/vmm/hm.h>
132	#include <VBox/vmm/nem.h>
133	#include <VBox/vmm/gim.h>
134	#include <VBox/vmm/ssm.h>
135	#include <VBox/vmm/dbgf.h>
136	#include <VBox/vmm/dbgftrace.h>
137	#include <VBox/vmm/pdmapi.h>
138	#include <VBox/vmm/iom.h>
139	#include "TMInternal.h"
140	#include <VBox/vmm/vm.h>
141	#include <VBox/vmm/uvm.h>
142
143	#include <VBox/vmm/pdmdev.h>
144	#include <VBox/log.h>
145	#include <VBox/param.h>
146	#include <VBox/err.h>
147
148	#include <iprt/asm.h>
149	#include <iprt/asm-math.h>
150	#include <iprt/assert.h>
151	#include <iprt/env.h>
152	#include <iprt/file.h>
153	#include <iprt/getopt.h>
154	#include <iprt/mem.h>
155	#include <iprt/rand.h>
156	#include <iprt/semaphore.h>
157	#include <iprt/string.h>
158	#include <iprt/thread.h>
159	#include <iprt/time.h>
160	#include <iprt/timer.h>
161
162	#include "TMInline.h"
163
164
165	/*********************************************************************************************************************************
166	* Defined Constants And Macros *
167	*********************************************************************************************************************************/
168	/** The current saved state version.*/
169	#define TM_SAVED_STATE_VERSION 3
170
171
172	/*********************************************************************************************************************************
173	* Internal Functions *
174	*********************************************************************************************************************************/
175	static bool tmR3HasFixedTSC(PVM pVM);
176	static uint64_t tmR3CalibrateTSC(void);
177	static DECLCALLBACK(int) tmR3Save(PVM pVM, PSSMHANDLE pSSM);
178	static DECLCALLBACK(int) tmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass);
179	#ifdef VBOX_WITH_STATISTICS
180	static void tmR3TimerQueueRegisterStats(PVM pVM, PTMTIMERQUEUE pQueue, uint32_t cTimers);
181	#endif
182	static DECLCALLBACK(void) tmR3TimerCallback(PRTTIMER pTimer, void *pvUser, uint64_t iTick);
183	static DECLCALLBACK(int) tmR3SetWarpDrive(PUVM pUVM, uint32_t u32Percent);
184	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
185	static DECLCALLBACK(void) tmR3CpuLoadTimer(PVM pVM, TMTIMERHANDLE hTimer, void *pvUser);
186	#endif
187	static DECLCALLBACK(void) tmR3TimerInfo(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
188	static DECLCALLBACK(void) tmR3TimerInfoActive(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
189	static DECLCALLBACK(void) tmR3InfoClocks(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
190	static DECLCALLBACK(void) tmR3InfoCpuLoad(PVM pVM, PCDBGFINFOHLP pHlp, int cArgs, char **papszArgs);
191	static DECLCALLBACK(VBOXSTRICTRC) tmR3CpuTickParavirtDisable(PVM pVM, PVMCPU pVCpu, void *pvData);
192	static const char *tmR3GetTSCModeName(PVM pVM);
193	static const char *tmR3GetTSCModeNameEx(TMTSCMODE enmMode);
194	static int tmR3TimerQueueGrow(PVM pVM, PTMTIMERQUEUE pQueue, uint32_t cNewTimers);
195
196
197	/**
198	* Initializes the TM.
199	*
200	* @returns VBox status code.
201	* @param pVM The cross context VM structure.
202	*/
203	VMM_INT_DECL(int) TMR3Init(PVM pVM)
204	{
205	LogFlow(("TMR3Init:\n"));
206
207	/*
208	* Assert alignment and sizes.
209	*/
210	AssertCompileMemberAlignment(VM, tm.s, 32);
211	AssertCompile(sizeof(pVM->tm.s) <= sizeof(pVM->tm.padding));
212	AssertCompileMemberAlignment(TM, VirtualSyncLock, 8);
213
214	/*
215	* Init the structure.
216	*/
217	pVM->tm.s.idTimerCpu = pVM->cCpus - 1; /* The last CPU. */
218
219	int rc = PDMR3CritSectInit(pVM, &pVM->tm.s.VirtualSyncLock, RT_SRC_POS, "TM VirtualSync Lock");
220	AssertLogRelRCReturn(rc, rc);
221
222	strcpy(pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL].szName, "virtual");
223	strcpy(pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC].szName, "virtual_sync"); /* Underscore is for STAM ordering issue. */
224	strcpy(pVM->tm.s.aTimerQueues[TMCLOCK_REAL].szName, "real");
225	strcpy(pVM->tm.s.aTimerQueues[TMCLOCK_TSC].szName, "tsc");
226
227	for (uint32_t i = 0; i < RT_ELEMENTS(pVM->tm.s.aTimerQueues); i++)
228	{
229	Assert(pVM->tm.s.aTimerQueues[i].szName[0] != '\0');
230	pVM->tm.s.aTimerQueues[i].enmClock = (TMCLOCK)i;
231	pVM->tm.s.aTimerQueues[i].u64Expire = INT64_MAX;
232	pVM->tm.s.aTimerQueues[i].idxActive = UINT32_MAX;
233	pVM->tm.s.aTimerQueues[i].idxSchedule = UINT32_MAX;
234	pVM->tm.s.aTimerQueues[i].idxFreeHint = 1;
235	pVM->tm.s.aTimerQueues[i].fBeingProcessed = false;
236	pVM->tm.s.aTimerQueues[i].fCannotGrow = false;
237	pVM->tm.s.aTimerQueues[i].hThread = NIL_RTTHREAD;
238	pVM->tm.s.aTimerQueues[i].hWorkerEvt = NIL_SUPSEMEVENT;
239
240	rc = PDMR3CritSectInit(pVM, &pVM->tm.s.aTimerQueues[i].TimerLock, RT_SRC_POS,
241	"TM %s queue timer lock", pVM->tm.s.aTimerQueues[i].szName);
242	AssertLogRelRCReturn(rc, rc);
243
244	rc = PDMR3CritSectRwInit(pVM, &pVM->tm.s.aTimerQueues[i].AllocLock, RT_SRC_POS,
245	"TM %s queue alloc lock", pVM->tm.s.aTimerQueues[i].szName);
246	AssertLogRelRCReturn(rc, rc);
247	}
248
249	/*
250	* We directly use the GIP to calculate the virtual time. We map the
251	* the GIP into the guest context so we can do this calculation there
252	* as well and save costly world switches.
253	*/
254	PSUPGLOBALINFOPAGE pGip = g_pSUPGlobalInfoPage;
255	if (pGip \|\| !SUPR3IsDriverless())
256	{
257	pVM->tm.s.pvGIPR3 = (void *)pGip;
258	AssertMsgReturn(pVM->tm.s.pvGIPR3, ("GIP support is now required!\n"), VERR_TM_GIP_REQUIRED);
259	AssertMsgReturn((pGip->u32Version >> 16) == (SUPGLOBALINFOPAGE_VERSION >> 16),
260	("Unsupported GIP version %#x! (expected=%#x)\n", pGip->u32Version, SUPGLOBALINFOPAGE_VERSION),
261	VERR_TM_GIP_VERSION);
262
263	/* Check assumptions made in TMAllVirtual.cpp about the GIP update interval. */
264	if ( pGip->u32Magic == SUPGLOBALINFOPAGE_MAGIC
265	&& pGip->u32UpdateIntervalNS >= 250000000 /* 0.25s */)
266	return VMSetError(pVM, VERR_TM_GIP_UPDATE_INTERVAL_TOO_BIG, RT_SRC_POS,
267	N_("The GIP update interval is too big. u32UpdateIntervalNS=%RU32 (u32UpdateHz=%RU32)"),
268	pGip->u32UpdateIntervalNS, pGip->u32UpdateHz);
269
270	/* Log GIP info that may come in handy. */
271	LogRel(("TM: GIP - u32Mode=%d (%s) u32UpdateHz=%u u32UpdateIntervalNS=%u enmUseTscDelta=%d (%s) fGetGipCpu=%#x cCpus=%d\n",
272	pGip->u32Mode, SUPGetGIPModeName(pGip), pGip->u32UpdateHz, pGip->u32UpdateIntervalNS,
273	pGip->enmUseTscDelta, SUPGetGIPTscDeltaModeName(pGip), pGip->fGetGipCpu, pGip->cCpus));
274	LogRel(("TM: GIP - u64CpuHz=%'RU64 (%#RX64) SUPGetCpuHzFromGip => %'RU64\n",
275	pGip->u64CpuHz, pGip->u64CpuHz, SUPGetCpuHzFromGip(pGip)));
276	for (uint32_t iCpuSet = 0; iCpuSet < RT_ELEMENTS(pGip->aiCpuFromCpuSetIdx); iCpuSet++)
277	{
278	uint16_t iGipCpu = pGip->aiCpuFromCpuSetIdx[iCpuSet];
279	if (iGipCpu != UINT16_MAX)
280	LogRel(("TM: GIP - CPU: iCpuSet=%#x idCpu=%#x idApic=%#x iGipCpu=%#x i64TSCDelta=%RI64 enmState=%d u64CpuHz=%RU64(*) cErrors=%u\n",
281	iCpuSet, pGip->aCPUs[iGipCpu].idCpu, pGip->aCPUs[iGipCpu].idApic, iGipCpu, pGip->aCPUs[iGipCpu].i64TSCDelta,
282	pGip->aCPUs[iGipCpu].enmState, pGip->aCPUs[iGipCpu].u64CpuHz, pGip->aCPUs[iGipCpu].cErrors));
283	}
284	}
285
286	/*
287	* Setup the VirtualGetRaw backend.
288	*/
289	pVM->tm.s.pfnVirtualGetRawR3 = tmVirtualNanoTSRediscover;
290	pVM->tm.s.VirtualGetRawDataR3.pfnRediscover = tmVirtualNanoTSRediscover;
291	pVM->tm.s.VirtualGetRawDataR3.pfnBad = tmVirtualNanoTSBad;
292	pVM->tm.s.VirtualGetRawDataR3.pfnBadCpuIndex = tmVirtualNanoTSBadCpuIndex;
293	pVM->tm.s.VirtualGetRawDataR3.pu64Prev = &pVM->tm.s.u64VirtualRawPrev;
294	if (!SUPR3IsDriverless())
295	{
296	pVM->tm.s.VirtualGetRawDataR0.pu64Prev = MMHyperR3ToR0(pVM, (void *)&pVM->tm.s.u64VirtualRawPrev);
297	AssertRelease(pVM->tm.s.VirtualGetRawDataR0.pu64Prev);
298	}
299	/* The rest is done in TMR3InitFinalize() since it's too early to call PDM. */
300
301	/*
302	* Get our CFGM node, create it if necessary.
303	*/
304	PCFGMNODE pCfgHandle = CFGMR3GetChild(CFGMR3GetRoot(pVM), "TM");
305	if (!pCfgHandle)
306	{
307	rc = CFGMR3InsertNode(CFGMR3GetRoot(pVM), "TM", &pCfgHandle);
308	AssertRCReturn(rc, rc);
309	}
310
311	/*
312	* Specific errors about some obsolete TM settings (remove after 2015-12-03).
313	*/
314	if (CFGMR3Exists(pCfgHandle, "TSCVirtualized"))
315	return VMSetError(pVM, VERR_CFGM_CONFIG_UNKNOWN_VALUE, RT_SRC_POS,
316	N_("Configuration error: TM setting \"TSCVirtualized\" is no longer supported. Use the \"TSCMode\" setting instead."));
317	if (CFGMR3Exists(pCfgHandle, "UseRealTSC"))
318	return VMSetError(pVM, VERR_CFGM_CONFIG_UNKNOWN_VALUE, RT_SRC_POS,
319	N_("Configuration error: TM setting \"UseRealTSC\" is no longer supported. Use the \"TSCMode\" setting instead."));
320
321	if (CFGMR3Exists(pCfgHandle, "MaybeUseOffsettedHostTSC"))
322	return VMSetError(pVM, VERR_CFGM_CONFIG_UNKNOWN_VALUE, RT_SRC_POS,
323	N_("Configuration error: TM setting \"MaybeUseOffsettedHostTSC\" is no longer supported. Use the \"TSCMode\" setting instead."));
324
325	/*
326	* Validate the rest of the TM settings.
327	*/
328	rc = CFGMR3ValidateConfig(pCfgHandle, "/TM/",
329	"TSCMode\|"
330	"TSCModeSwitchAllowed\|"
331	"TSCTicksPerSecond\|"
332	"TSCTiedToExecution\|"
333	"TSCNotTiedToHalt\|"
334	"ScheduleSlack\|"
335	"CatchUpStopThreshold\|"
336	"CatchUpGiveUpThreshold\|"
337	"CatchUpStartThreshold0\|CatchUpStartThreshold1\|CatchUpStartThreshold2\|CatchUpStartThreshold3\|"
338	"CatchUpStartThreshold4\|CatchUpStartThreshold5\|CatchUpStartThreshold6\|CatchUpStartThreshold7\|"
339	"CatchUpStartThreshold8\|CatchUpStartThreshold9\|"
340	"CatchUpPrecentage0\|CatchUpPrecentage1\|CatchUpPrecentage2\|CatchUpPrecentage3\|"
341	"CatchUpPrecentage4\|CatchUpPrecentage5\|CatchUpPrecentage6\|CatchUpPrecentage7\|"
342	"CatchUpPrecentage8\|CatchUpPrecentage9\|"
343	"UTCOffset\|"
344	"UTCTouchFileOnJump\|"
345	"WarpDrivePercentage\|"
346	"HostHzMax\|"
347	"HostHzFudgeFactorTimerCpu\|"
348	"HostHzFudgeFactorOtherCpu\|"
349	"HostHzFudgeFactorCatchUp100\|"
350	"HostHzFudgeFactorCatchUp200\|"
351	"HostHzFudgeFactorCatchUp400\|"
352	"TimerMillies"
353	,
354	"",
355	"TM", 0);
356	if (RT_FAILURE(rc))
357	return rc;
358
359	/*
360	* Determine the TSC configuration and frequency.
361	*/
362	/** @cfgm{/TM/TSCMode, string, Depends on the CPU and VM config}
363	* The name of the TSC mode to use: VirtTSCEmulated, RealTSCOffset or Dynamic.
364	* The default depends on the VM configuration and the capabilities of the
365	* host CPU. Other config options or runtime changes may override the TSC
366	* mode specified here.
367	*/
368	char szTSCMode[32];
369	rc = CFGMR3QueryString(pCfgHandle, "TSCMode", szTSCMode, sizeof(szTSCMode));
370	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
371	{
372	/** @todo Rainy-day/never: Dynamic mode isn't currently suitable for SMP VMs, so
373	* fall back on the more expensive emulated mode. With the current TSC handling
374	* (frequent switching between offsetted mode and taking VM exits, on all VCPUs
375	* without any kind of coordination) will lead to inconsistent TSC behavior with
376	* guest SMP, including TSC going backwards. */
377	pVM->tm.s.enmTSCMode = NEMR3NeedSpecialTscMode(pVM) ? TMTSCMODE_NATIVE_API
378	: pVM->cCpus == 1 && tmR3HasFixedTSC(pVM) ? TMTSCMODE_DYNAMIC : TMTSCMODE_VIRT_TSC_EMULATED;
379	}
380	else if (RT_FAILURE(rc))
381	return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: Failed to querying string value \"TSCMode\""));
382	else
383	{
384	if (!RTStrCmp(szTSCMode, "VirtTSCEmulated"))
385	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
386	else if (!RTStrCmp(szTSCMode, "RealTSCOffset"))
387	pVM->tm.s.enmTSCMode = TMTSCMODE_REAL_TSC_OFFSET;
388	else if (!RTStrCmp(szTSCMode, "Dynamic"))
389	pVM->tm.s.enmTSCMode = TMTSCMODE_DYNAMIC;
390	else
391	return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: Unrecognized TM TSC mode value \"%s\""), szTSCMode);
392	if (NEMR3NeedSpecialTscMode(pVM))
393	{
394	LogRel(("TM: NEM overrides the /TM/TSCMode=%s settings.\n", szTSCMode));
395	pVM->tm.s.enmTSCMode = TMTSCMODE_NATIVE_API;
396	}
397	}
398
399	/**
400	* @cfgm{/TM/TSCModeSwitchAllowed, bool, Whether TM TSC mode switch is allowed
401	* at runtime}
402	* When using paravirtualized guests, we dynamically switch TSC modes to a more
403	* optimal one for performance. This setting allows overriding this behaviour.
404	*/
405	rc = CFGMR3QueryBool(pCfgHandle, "TSCModeSwitchAllowed", &pVM->tm.s.fTSCModeSwitchAllowed);
406	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
407	{
408	/* This is finally determined in TMR3InitFinalize() as GIM isn't initialized yet. */
409	pVM->tm.s.fTSCModeSwitchAllowed = true;
410	}
411	else if (RT_FAILURE(rc))
412	return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: Failed to querying bool value \"TSCModeSwitchAllowed\""));
413	if (pVM->tm.s.fTSCModeSwitchAllowed && pVM->tm.s.enmTSCMode == TMTSCMODE_NATIVE_API)
414	{
415	LogRel(("TM: NEM overrides the /TM/TSCModeSwitchAllowed setting.\n"));
416	pVM->tm.s.fTSCModeSwitchAllowed = false;
417	}
418
419	/** @cfgm{/TM/TSCTicksPerSecond, uint32_t, Current TSC frequency from GIP}
420	* The number of TSC ticks per second (i.e. the TSC frequency). This will
421	* override enmTSCMode.
422	*/
423	pVM->tm.s.cTSCTicksPerSecondHost = tmR3CalibrateTSC();
424	rc = CFGMR3QueryU64(pCfgHandle, "TSCTicksPerSecond", &pVM->tm.s.cTSCTicksPerSecond);
425	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
426	{
427	pVM->tm.s.cTSCTicksPerSecond = pVM->tm.s.cTSCTicksPerSecondHost;
428	if ( ( pVM->tm.s.enmTSCMode == TMTSCMODE_DYNAMIC
429	\|\| pVM->tm.s.enmTSCMode == TMTSCMODE_VIRT_TSC_EMULATED)
430	&& pVM->tm.s.cTSCTicksPerSecond >= _4G)
431	{
432	pVM->tm.s.cTSCTicksPerSecond = _4G - 1; /* (A limitation of our math code) */
433	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
434	}
435	}
436	else if (RT_FAILURE(rc))
437	return VMSetError(pVM, rc, RT_SRC_POS,
438	N_("Configuration error: Failed to querying uint64_t value \"TSCTicksPerSecond\""));
439	else if ( pVM->tm.s.cTSCTicksPerSecond < _1M
440	\|\| pVM->tm.s.cTSCTicksPerSecond >= _4G)
441	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS,
442	N_("Configuration error: \"TSCTicksPerSecond\" = %RI64 is not in the range 1MHz..4GHz-1"),
443	pVM->tm.s.cTSCTicksPerSecond);
444	else if (pVM->tm.s.enmTSCMode != TMTSCMODE_NATIVE_API)
445	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
446	else
447	{
448	LogRel(("TM: NEM overrides the /TM/TSCTicksPerSecond=%RU64 setting.\n", pVM->tm.s.cTSCTicksPerSecond));
449	pVM->tm.s.cTSCTicksPerSecond = pVM->tm.s.cTSCTicksPerSecondHost;
450	}
451
452	/** @cfgm{/TM/TSCTiedToExecution, bool, false}
453	* Whether the TSC should be tied to execution. This will exclude most of the
454	* virtualization overhead, but will by default include the time spent in the
455	* halt state (see TM/TSCNotTiedToHalt). This setting will override all other
456	* TSC settings except for TSCTicksPerSecond and TSCNotTiedToHalt, which should
457	* be used avoided or used with great care. Note that this will only work right
458	* together with VT-x or AMD-V, and with a single virtual CPU. */
459	rc = CFGMR3QueryBoolDef(pCfgHandle, "TSCTiedToExecution", &pVM->tm.s.fTSCTiedToExecution, false);
460	if (RT_FAILURE(rc))
461	return VMSetError(pVM, rc, RT_SRC_POS,
462	N_("Configuration error: Failed to querying bool value \"TSCTiedToExecution\""));
463	if (pVM->tm.s.fTSCTiedToExecution && pVM->tm.s.enmTSCMode == TMTSCMODE_NATIVE_API)
464	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, N_("/TM/TSCTiedToExecution is not supported in NEM mode!"));
465	if (pVM->tm.s.fTSCTiedToExecution)
466	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
467
468
469	/** @cfgm{/TM/TSCNotTiedToHalt, bool, false}
470	* This is used with /TM/TSCTiedToExecution to control how TSC operates
471	* accross HLT instructions. When true HLT is considered execution time and
472	* TSC continues to run, while when false (default) TSC stops during halt. */
473	rc = CFGMR3QueryBoolDef(pCfgHandle, "TSCNotTiedToHalt", &pVM->tm.s.fTSCNotTiedToHalt, false);
474	if (RT_FAILURE(rc))
475	return VMSetError(pVM, rc, RT_SRC_POS,
476	N_("Configuration error: Failed to querying bool value \"TSCNotTiedToHalt\""));
477
478	/*
479	* Configure the timer synchronous virtual time.
480	*/
481	/** @cfgm{/TM/ScheduleSlack, uint32_t, ns, 0, UINT32_MAX, 100000}
482	* Scheduling slack when processing timers. */
483	rc = CFGMR3QueryU32(pCfgHandle, "ScheduleSlack", &pVM->tm.s.u32VirtualSyncScheduleSlack);
484	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
485	pVM->tm.s.u32VirtualSyncScheduleSlack = 100000; /* 0.100ms (ASSUMES virtual time is nanoseconds) */
486	else if (RT_FAILURE(rc))
487	return VMSetError(pVM, rc, RT_SRC_POS,
488	N_("Configuration error: Failed to querying 32-bit integer value \"ScheduleSlack\""));
489
490	/** @cfgm{/TM/CatchUpStopThreshold, uint64_t, ns, 0, UINT64_MAX, 500000}
491	* When to stop a catch-up, considering it successful. */
492	rc = CFGMR3QueryU64(pCfgHandle, "CatchUpStopThreshold", &pVM->tm.s.u64VirtualSyncCatchUpStopThreshold);
493	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
494	pVM->tm.s.u64VirtualSyncCatchUpStopThreshold = 500000; /* 0.5ms */
495	else if (RT_FAILURE(rc))
496	return VMSetError(pVM, rc, RT_SRC_POS,
497	N_("Configuration error: Failed to querying 64-bit integer value \"CatchUpStopThreshold\""));
498
499	/** @cfgm{/TM/CatchUpGiveUpThreshold, uint64_t, ns, 0, UINT64_MAX, 60000000000}
500	* When to give up a catch-up attempt. */
501	rc = CFGMR3QueryU64(pCfgHandle, "CatchUpGiveUpThreshold", &pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold);
502	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
503	pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold = UINT64_C(60000000000); /* 60 sec */
504	else if (RT_FAILURE(rc))
505	return VMSetError(pVM, rc, RT_SRC_POS,
506	N_("Configuration error: Failed to querying 64-bit integer value \"CatchUpGiveUpThreshold\""));
507
508
509	/** @cfgm{/TM/CatchUpPrecentage[0..9], uint32_t, %, 1, 2000, various}
510	* The catch-up percent for a given period. */
511	/** @cfgm{/TM/CatchUpStartThreshold[0..9], uint64_t, ns, 0, UINT64_MAX}
512	* The catch-up period threshold, or if you like, when a period starts. */
513	#define TM_CFG_PERIOD(iPeriod, DefStart, DefPct) \
514	do \
515	{ \
516	uint64_t u64; \
517	rc = CFGMR3QueryU64(pCfgHandle, "CatchUpStartThreshold" #iPeriod, &u64); \
518	if (rc == VERR_CFGM_VALUE_NOT_FOUND) \
519	u64 = UINT64_C(DefStart); \
520	else if (RT_FAILURE(rc)) \
521	return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: Failed to querying 64-bit integer value \"CatchUpThreshold" #iPeriod "\"")); \
522	if ( (iPeriod > 0 && u64 <= pVM->tm.s.aVirtualSyncCatchUpPeriods[iPeriod - 1].u64Start) \
523	\|\| u64 >= pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold) \
524	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, N_("Configuration error: Invalid start of period #" #iPeriod ": %'RU64"), u64); \
525	pVM->tm.s.aVirtualSyncCatchUpPeriods[iPeriod].u64Start = u64; \
526	rc = CFGMR3QueryU32(pCfgHandle, "CatchUpPrecentage" #iPeriod, &pVM->tm.s.aVirtualSyncCatchUpPeriods[iPeriod].u32Percentage); \
527	if (rc == VERR_CFGM_VALUE_NOT_FOUND) \
528	pVM->tm.s.aVirtualSyncCatchUpPeriods[iPeriod].u32Percentage = (DefPct); \
529	else if (RT_FAILURE(rc)) \
530	return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: Failed to querying 32-bit integer value \"CatchUpPrecentage" #iPeriod "\"")); \
531	} while (0)
532	/* This needs more tuning. Not sure if we really need so many period and be so gentle. */
533	TM_CFG_PERIOD(0, 750000, 5); /* 0.75ms at 1.05x */
534	TM_CFG_PERIOD(1, 1500000, 10); /* 1.50ms at 1.10x */
535	TM_CFG_PERIOD(2, 8000000, 25); /* 8ms at 1.25x */
536	TM_CFG_PERIOD(3, 30000000, 50); /* 30ms at 1.50x */
537	TM_CFG_PERIOD(4, 75000000, 75); /* 75ms at 1.75x */
538	TM_CFG_PERIOD(5, 175000000, 100); /* 175ms at 2x */
539	TM_CFG_PERIOD(6, 500000000, 200); /* 500ms at 3x */
540	TM_CFG_PERIOD(7, 3000000000, 300); /* 3s at 4x */
541	TM_CFG_PERIOD(8,30000000000, 400); /* 30s at 5x */
542	TM_CFG_PERIOD(9,55000000000, 500); /* 55s at 6x */
543	AssertCompile(RT_ELEMENTS(pVM->tm.s.aVirtualSyncCatchUpPeriods) == 10);
544	#undef TM_CFG_PERIOD
545
546	/*
547	* Configure real world time (UTC).
548	*/
549	/** @cfgm{/TM/UTCOffset, int64_t, ns, INT64_MIN, INT64_MAX, 0}
550	* The UTC offset. This is used to put the guest back or forwards in time. */
551	rc = CFGMR3QueryS64(pCfgHandle, "UTCOffset", &pVM->tm.s.offUTC);
552	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
553	pVM->tm.s.offUTC = 0; /* ns */
554	else if (RT_FAILURE(rc))
555	return VMSetError(pVM, rc, RT_SRC_POS,
556	N_("Configuration error: Failed to querying 64-bit integer value \"UTCOffset\""));
557
558	/** @cfgm{/TM/UTCTouchFileOnJump, string, none}
559	* File to be written to everytime the host time jumps. */
560	rc = CFGMR3QueryStringAlloc(pCfgHandle, "UTCTouchFileOnJump", &pVM->tm.s.pszUtcTouchFileOnJump);
561	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
562	pVM->tm.s.pszUtcTouchFileOnJump = NULL;
563	else if (RT_FAILURE(rc))
564	return VMSetError(pVM, rc, RT_SRC_POS,
565	N_("Configuration error: Failed to querying string value \"UTCTouchFileOnJump\""));
566
567	/*
568	* Setup the warp drive.
569	*/
570	/** @cfgm{/TM/WarpDrivePercentage, uint32_t, %, 0, 20000, 100}
571	* The warp drive percentage, 100% is normal speed. This is used to speed up
572	* or slow down the virtual clock, which can be useful for fast forwarding
573	* borring periods during tests. */
574	rc = CFGMR3QueryU32(pCfgHandle, "WarpDrivePercentage", &pVM->tm.s.u32VirtualWarpDrivePercentage);
575	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
576	rc = CFGMR3QueryU32(CFGMR3GetRoot(pVM), "WarpDrivePercentage", &pVM->tm.s.u32VirtualWarpDrivePercentage); /* legacy */
577	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
578	pVM->tm.s.u32VirtualWarpDrivePercentage = 100;
579	else if (RT_FAILURE(rc))
580	return VMSetError(pVM, rc, RT_SRC_POS,
581	N_("Configuration error: Failed to querying uint32_t value \"WarpDrivePercent\""));
582	else if ( pVM->tm.s.u32VirtualWarpDrivePercentage < 2
583	\|\| pVM->tm.s.u32VirtualWarpDrivePercentage > 20000)
584	return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS,
585	N_("Configuration error: \"WarpDrivePercent\" = %RI32 is not in the range 2..20000"),
586	pVM->tm.s.u32VirtualWarpDrivePercentage);
587	pVM->tm.s.fVirtualWarpDrive = pVM->tm.s.u32VirtualWarpDrivePercentage != 100;
588	if (pVM->tm.s.fVirtualWarpDrive)
589	{
590	if (pVM->tm.s.enmTSCMode == TMTSCMODE_NATIVE_API)
591	LogRel(("TM: Warp-drive active, escept for TSC which is in NEM mode. u32VirtualWarpDrivePercentage=%RI32\n",
592	pVM->tm.s.u32VirtualWarpDrivePercentage));
593	else
594	{
595	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
596	LogRel(("TM: Warp-drive active. u32VirtualWarpDrivePercentage=%RI32\n", pVM->tm.s.u32VirtualWarpDrivePercentage));
597	}
598	}
599
600	/*
601	* Gather the Host Hz configuration values.
602	*/
603	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzMax", &pVM->tm.s.cHostHzMax, 20000);
604	if (RT_FAILURE(rc))
605	return VMSetError(pVM, rc, RT_SRC_POS,
606	N_("Configuration error: Failed to querying uint32_t value \"HostHzMax\""));
607
608	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzFudgeFactorTimerCpu", &pVM->tm.s.cPctHostHzFudgeFactorTimerCpu, 111);
609	if (RT_FAILURE(rc))
610	return VMSetError(pVM, rc, RT_SRC_POS,
611	N_("Configuration error: Failed to querying uint32_t value \"HostHzFudgeFactorTimerCpu\""));
612
613	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzFudgeFactorOtherCpu", &pVM->tm.s.cPctHostHzFudgeFactorOtherCpu, 110);
614	if (RT_FAILURE(rc))
615	return VMSetError(pVM, rc, RT_SRC_POS,
616	N_("Configuration error: Failed to querying uint32_t value \"HostHzFudgeFactorOtherCpu\""));
617
618	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzFudgeFactorCatchUp100", &pVM->tm.s.cPctHostHzFudgeFactorCatchUp100, 300);
619	if (RT_FAILURE(rc))
620	return VMSetError(pVM, rc, RT_SRC_POS,
621	N_("Configuration error: Failed to querying uint32_t value \"HostHzFudgeFactorCatchUp100\""));
622
623	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzFudgeFactorCatchUp200", &pVM->tm.s.cPctHostHzFudgeFactorCatchUp200, 250);
624	if (RT_FAILURE(rc))
625	return VMSetError(pVM, rc, RT_SRC_POS,
626	N_("Configuration error: Failed to querying uint32_t value \"HostHzFudgeFactorCatchUp200\""));
627
628	rc = CFGMR3QueryU32Def(pCfgHandle, "HostHzFudgeFactorCatchUp400", &pVM->tm.s.cPctHostHzFudgeFactorCatchUp400, 200);
629	if (RT_FAILURE(rc))
630	return VMSetError(pVM, rc, RT_SRC_POS,
631	N_("Configuration error: Failed to querying uint32_t value \"HostHzFudgeFactorCatchUp400\""));
632
633	/*
634	* Finally, setup and report.
635	*/
636	pVM->tm.s.enmOriginalTSCMode = pVM->tm.s.enmTSCMode;
637	CPUMR3SetCR4Feature(pVM, X86_CR4_TSD, ~X86_CR4_TSD);
638	LogRel(("TM: cTSCTicksPerSecond=%'RU64 (%#RX64) enmTSCMode=%d (%s)\n"
639	"TM: cTSCTicksPerSecondHost=%'RU64 (%#RX64)\n"
640	"TM: TSCTiedToExecution=%RTbool TSCNotTiedToHalt=%RTbool\n",
641	pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.enmTSCMode, tmR3GetTSCModeName(pVM),
642	pVM->tm.s.cTSCTicksPerSecondHost, pVM->tm.s.cTSCTicksPerSecondHost,
643	pVM->tm.s.fTSCTiedToExecution, pVM->tm.s.fTSCNotTiedToHalt));
644
645	/*
646	* Start the timer (guard against REM not yielding).
647	*/
648	/** @cfgm{/TM/TimerMillies, uint32_t, ms, 1, 1000, 10}
649	* The watchdog timer interval. */
650	uint32_t u32Millies;
651	rc = CFGMR3QueryU32(pCfgHandle, "TimerMillies", &u32Millies);
652	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
653	u32Millies = VM_IS_HM_ENABLED(pVM) ? 1000 : 10;
654	else if (RT_FAILURE(rc))
655	return VMSetError(pVM, rc, RT_SRC_POS,
656	N_("Configuration error: Failed to query uint32_t value \"TimerMillies\""));
657	rc = RTTimerCreate(&pVM->tm.s.pTimer, u32Millies, tmR3TimerCallback, pVM);
658	if (RT_FAILURE(rc))
659	{
660	AssertMsgFailed(("Failed to create timer, u32Millies=%d rc=%Rrc.\n", u32Millies, rc));
661	return rc;
662	}
663	Log(("TM: Created timer %p firing every %d milliseconds\n", pVM->tm.s.pTimer, u32Millies));
664	pVM->tm.s.u32TimerMillies = u32Millies;
665
666	/*
667	* Register saved state.
668	*/
669	rc = SSMR3RegisterInternal(pVM, "tm", 1, TM_SAVED_STATE_VERSION, sizeof(uint64_t) * 8,
670	NULL, NULL, NULL,
671	NULL, tmR3Save, NULL,
672	NULL, tmR3Load, NULL);
673	if (RT_FAILURE(rc))
674	return rc;
675
676	/*
677	* Register statistics.
678	*/
679	STAM_REL_REG_USED(pVM,(void*)&pVM->tm.s.VirtualGetRawDataR3.c1nsSteps,STAMTYPE_U32, "/TM/R3/1nsSteps", STAMUNIT_OCCURENCES, "Virtual time 1ns steps (due to TSC / GIP variations).");
680	STAM_REL_REG_USED(pVM,(void*)&pVM->tm.s.VirtualGetRawDataR3.cBadPrev, STAMTYPE_U32, "/TM/R3/cBadPrev", STAMUNIT_OCCURENCES, "Times the previous virtual time was considered erratic (shouldn't ever happen).");
681	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).");
682	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).");
683	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)");
684	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.");
685	STAM_REL_REG( pVM,(void*)&pVM->tm.s.HzHint.s.uMax, STAMTYPE_U32, "/TM/MaxHzHint", STAMUNIT_HZ, "Max guest timer frequency hint.");
686	for (uint32_t i = 0; i < RT_ELEMENTS(pVM->tm.s.aTimerQueues); i++)
687	{
688	rc = STAMR3RegisterF(pVM, (void *)&pVM->tm.s.aTimerQueues[i].uMaxHzHint, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, STAMUNIT_HZ,
689	"", "/TM/MaxHzHint/%s", pVM->tm.s.aTimerQueues[i].szName);
690	AssertRC(rc);
691	}
692
693	#ifdef VBOX_WITH_STATISTICS
694	STAM_REG_USED(pVM,(void *)&pVM->tm.s.VirtualGetRawDataR3.cExpired, STAMTYPE_U32, "/TM/R3/cExpired", STAMUNIT_OCCURENCES, "Times the TSC interval expired (overlaps 1ns steps).");
695	STAM_REG_USED(pVM,(void *)&pVM->tm.s.VirtualGetRawDataR3.cUpdateRaces,STAMTYPE_U32, "/TM/R3/cUpdateRaces", STAMUNIT_OCCURENCES, "Thread races when updating the previous timestamp.");
696	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).");
697	STAM_REG_USED(pVM,(void *)&pVM->tm.s.VirtualGetRawDataR0.cUpdateRaces,STAMTYPE_U32, "/TM/R0/cUpdateRaces", STAMUNIT_OCCURENCES, "Thread races when updating the previous timestamp.");
698	STAM_REG(pVM, &pVM->tm.s.StatDoQueues, STAMTYPE_PROFILE, "/TM/DoQueues", STAMUNIT_TICKS_PER_CALL, "Profiling timer TMR3TimerQueuesDo.");
699	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.");
700	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.");
701	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.");
702
703	STAM_REG(pVM, &pVM->tm.s.StatPoll, STAMTYPE_COUNTER, "/TM/Poll", STAMUNIT_OCCURENCES, "TMTimerPoll calls.");
704	STAM_REG(pVM, &pVM->tm.s.StatPollAlreadySet, STAMTYPE_COUNTER, "/TM/Poll/AlreadySet", STAMUNIT_OCCURENCES, "TMTimerPoll calls where the FF was already set.");
705	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.");
706	STAM_REG(pVM, &pVM->tm.s.StatPollMiss, STAMTYPE_COUNTER, "/TM/Poll/Miss", STAMUNIT_OCCURENCES, "TMTimerPoll calls where nothing had expired.");
707	STAM_REG(pVM, &pVM->tm.s.StatPollRunning, STAMTYPE_COUNTER, "/TM/Poll/Running", STAMUNIT_OCCURENCES, "TMTimerPoll calls where the queues were being run.");
708	STAM_REG(pVM, &pVM->tm.s.StatPollSimple, STAMTYPE_COUNTER, "/TM/Poll/Simple", STAMUNIT_OCCURENCES, "TMTimerPoll calls where we could take the simple path.");
709	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.");
710	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.");
711
712	STAM_REG(pVM, &pVM->tm.s.StatPostponedR3, STAMTYPE_COUNTER, "/TM/PostponedR3", STAMUNIT_OCCURENCES, "Postponed due to unschedulable state, in ring-3.");
713	STAM_REG(pVM, &pVM->tm.s.StatPostponedRZ, STAMTYPE_COUNTER, "/TM/PostponedRZ", STAMUNIT_OCCURENCES, "Postponed due to unschedulable state, in ring-0 / RC.");
714
715	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.");
716	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.");
717	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.");
718
719	STAM_REG(pVM, &pVM->tm.s.StatTimerSet, STAMTYPE_COUNTER, "/TM/TimerSet", STAMUNIT_OCCURENCES, "Calls, except virtual sync timers");
720	STAM_REG(pVM, &pVM->tm.s.StatTimerSetOpt, STAMTYPE_COUNTER, "/TM/TimerSet/Opt", STAMUNIT_OCCURENCES, "Optimized path taken.");
721	STAM_REG(pVM, &pVM->tm.s.StatTimerSetR3, STAMTYPE_PROFILE, "/TM/TimerSet/R3", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerSet calls made in ring-3.");
722	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRZ, STAMTYPE_PROFILE, "/TM/TimerSet/RZ", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerSet calls made in ring-0 / RC.");
723	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStActive, STAMTYPE_COUNTER, "/TM/TimerSet/StActive", STAMUNIT_OCCURENCES, "ACTIVE");
724	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStExpDeliver, STAMTYPE_COUNTER, "/TM/TimerSet/StExpDeliver", STAMUNIT_OCCURENCES, "EXPIRED_DELIVER");
725	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStOther, STAMTYPE_COUNTER, "/TM/TimerSet/StOther", STAMUNIT_OCCURENCES, "Other states");
726	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStPendStop, STAMTYPE_COUNTER, "/TM/TimerSet/StPendStop", STAMUNIT_OCCURENCES, "PENDING_STOP");
727	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStPendStopSched, STAMTYPE_COUNTER, "/TM/TimerSet/StPendStopSched", STAMUNIT_OCCURENCES, "PENDING_STOP_SCHEDULE");
728	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStPendSched, STAMTYPE_COUNTER, "/TM/TimerSet/StPendSched", STAMUNIT_OCCURENCES, "PENDING_SCHEDULE");
729	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStPendResched, STAMTYPE_COUNTER, "/TM/TimerSet/StPendResched", STAMUNIT_OCCURENCES, "PENDING_RESCHEDULE");
730	STAM_REG(pVM, &pVM->tm.s.StatTimerSetStStopped, STAMTYPE_COUNTER, "/TM/TimerSet/StStopped", STAMUNIT_OCCURENCES, "STOPPED");
731
732	STAM_REG(pVM, &pVM->tm.s.StatTimerSetVs, STAMTYPE_COUNTER, "/TM/TimerSetVs", STAMUNIT_OCCURENCES, "TMTimerSet calls on virtual sync timers");
733	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.");
734	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.");
735	STAM_REG(pVM, &pVM->tm.s.StatTimerSetVsStActive, STAMTYPE_COUNTER, "/TM/TimerSetVs/StActive", STAMUNIT_OCCURENCES, "ACTIVE");
736	STAM_REG(pVM, &pVM->tm.s.StatTimerSetVsStExpDeliver, STAMTYPE_COUNTER, "/TM/TimerSetVs/StExpDeliver", STAMUNIT_OCCURENCES, "EXPIRED_DELIVER");
737	STAM_REG(pVM, &pVM->tm.s.StatTimerSetVsStStopped, STAMTYPE_COUNTER, "/TM/TimerSetVs/StStopped", STAMUNIT_OCCURENCES, "STOPPED");
738
739	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelative, STAMTYPE_COUNTER, "/TM/TimerSetRelative", STAMUNIT_OCCURENCES, "Calls, except virtual sync timers");
740	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeOpt, STAMTYPE_COUNTER, "/TM/TimerSetRelative/Opt", STAMUNIT_OCCURENCES, "Optimized path taken.");
741	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).");
742	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).");
743	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStActive, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StActive", STAMUNIT_OCCURENCES, "ACTIVE");
744	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStExpDeliver, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StExpDeliver", STAMUNIT_OCCURENCES, "EXPIRED_DELIVER");
745	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStOther, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StOther", STAMUNIT_OCCURENCES, "Other states");
746	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStPendStop, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StPendStop", STAMUNIT_OCCURENCES, "PENDING_STOP");
747	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStPendStopSched, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StPendStopSched",STAMUNIT_OCCURENCES, "PENDING_STOP_SCHEDULE");
748	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStPendSched, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StPendSched", STAMUNIT_OCCURENCES, "PENDING_SCHEDULE");
749	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStPendResched, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StPendResched", STAMUNIT_OCCURENCES, "PENDING_RESCHEDULE");
750	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeStStopped, STAMTYPE_COUNTER, "/TM/TimerSetRelative/StStopped", STAMUNIT_OCCURENCES, "STOPPED");
751
752	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeVs, STAMTYPE_COUNTER, "/TM/TimerSetRelativeVs", STAMUNIT_OCCURENCES, "TMTimerSetRelative calls on virtual sync timers");
753	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.");
754	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.");
755	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeVsStActive, STAMTYPE_COUNTER, "/TM/TimerSetRelativeVs/StActive", STAMUNIT_OCCURENCES, "ACTIVE");
756	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeVsStExpDeliver, STAMTYPE_COUNTER, "/TM/TimerSetRelativeVs/StExpDeliver", STAMUNIT_OCCURENCES, "EXPIRED_DELIVER");
757	STAM_REG(pVM, &pVM->tm.s.StatTimerSetRelativeVsStStopped, STAMTYPE_COUNTER, "/TM/TimerSetRelativeVs/StStopped", STAMUNIT_OCCURENCES, "STOPPED");
758
759	STAM_REG(pVM, &pVM->tm.s.StatTimerStopR3, STAMTYPE_PROFILE, "/TM/TimerStopR3", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerStop calls made in ring-3.");
760	STAM_REG(pVM, &pVM->tm.s.StatTimerStopRZ, STAMTYPE_PROFILE, "/TM/TimerStopRZ", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerStop calls made in ring-0 / RC.");
761
762	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.");
763	STAM_REG(pVM, &pVM->tm.s.StatVirtualGetSetFF, STAMTYPE_COUNTER, "/TM/VirtualGetSetFF", STAMUNIT_OCCURENCES, "Times we set the FF when calling TMTimerGet.");
764	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGet, STAMTYPE_COUNTER, "/TM/VirtualSyncGet", STAMUNIT_OCCURENCES, "The number of times tmVirtualSyncGetEx was called.");
765	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGetAdjLast, STAMTYPE_COUNTER, "/TM/VirtualSyncGet/AdjLast", STAMUNIT_OCCURENCES, "Times we've adjusted against the last returned time stamp .");
766	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.");
767	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGetExpired, STAMTYPE_COUNTER, "/TM/VirtualSyncGet/Expired", STAMUNIT_OCCURENCES, "Times tmVirtualSyncGetEx encountered an expired timer stopping the clock.");
768	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGetLocked, STAMTYPE_COUNTER, "/TM/VirtualSyncGet/Locked", STAMUNIT_OCCURENCES, "Times we successfully acquired the lock in tmVirtualSyncGetEx.");
769	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGetLockless, STAMTYPE_COUNTER, "/TM/VirtualSyncGet/Lockless", STAMUNIT_OCCURENCES, "Times tmVirtualSyncGetEx returned without needing to take the lock.");
770	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGetSetFF, STAMTYPE_COUNTER, "/TM/VirtualSyncGet/SetFF", STAMUNIT_OCCURENCES, "Times we set the FF when calling tmVirtualSyncGetEx.");
771	STAM_REG(pVM, &pVM->tm.s.StatVirtualPause, STAMTYPE_COUNTER, "/TM/VirtualPause", STAMUNIT_OCCURENCES, "The number of times TMR3TimerPause was called.");
772	STAM_REG(pVM, &pVM->tm.s.StatVirtualResume, STAMTYPE_COUNTER, "/TM/VirtualResume", STAMUNIT_OCCURENCES, "The number of times TMR3TimerResume was called.");
773
774	STAM_REG(pVM, &pVM->tm.s.StatTimerCallbackSetFF, STAMTYPE_COUNTER, "/TM/CallbackSetFF", STAMUNIT_OCCURENCES, "The number of times the timer callback set FF.");
775	STAM_REG(pVM, &pVM->tm.s.StatTimerCallback, STAMTYPE_COUNTER, "/TM/Callback", STAMUNIT_OCCURENCES, "The number of times the timer callback is invoked.");
776
777	STAM_REG(pVM, &pVM->tm.s.StatTSCCatchupLE010, STAMTYPE_COUNTER, "/TM/TSC/Intercept/CatchupLE010", STAMUNIT_OCCURENCES, "In catch-up mode, 10% or lower.");
778	STAM_REG(pVM, &pVM->tm.s.StatTSCCatchupLE025, STAMTYPE_COUNTER, "/TM/TSC/Intercept/CatchupLE025", STAMUNIT_OCCURENCES, "In catch-up mode, 25%-11%.");
779	STAM_REG(pVM, &pVM->tm.s.StatTSCCatchupLE100, STAMTYPE_COUNTER, "/TM/TSC/Intercept/CatchupLE100", STAMUNIT_OCCURENCES, "In catch-up mode, 100%-26%.");
780	STAM_REG(pVM, &pVM->tm.s.StatTSCCatchupOther, STAMTYPE_COUNTER, "/TM/TSC/Intercept/CatchupOther", STAMUNIT_OCCURENCES, "In catch-up mode, > 100%.");
781	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.");
782	STAM_REG(pVM, &pVM->tm.s.StatTSCNotTicking, STAMTYPE_COUNTER, "/TM/TSC/Intercept/NotTicking", STAMUNIT_OCCURENCES, "TSC is not ticking.");
783	STAM_REG(pVM, &pVM->tm.s.StatTSCSyncNotTicking, STAMTYPE_COUNTER, "/TM/TSC/Intercept/SyncNotTicking", STAMUNIT_OCCURENCES, "VirtualSync isn't ticking.");
784	STAM_REG(pVM, &pVM->tm.s.StatTSCWarp, STAMTYPE_COUNTER, "/TM/TSC/Intercept/Warp", STAMUNIT_OCCURENCES, "Warpdrive is active.");
785	STAM_REG(pVM, &pVM->tm.s.StatTSCSet, STAMTYPE_COUNTER, "/TM/TSC/Sets", STAMUNIT_OCCURENCES, "Calls to TMCpuTickSet.");
786	STAM_REG(pVM, &pVM->tm.s.StatTSCUnderflow, STAMTYPE_COUNTER, "/TM/TSC/Underflow", STAMUNIT_OCCURENCES, "TSC underflow; corrected with last seen value .");
787	STAM_REG(pVM, &pVM->tm.s.StatVirtualPause, STAMTYPE_COUNTER, "/TM/TSC/Pause", STAMUNIT_OCCURENCES, "The number of times the TSC was paused.");
788	STAM_REG(pVM, &pVM->tm.s.StatVirtualResume, STAMTYPE_COUNTER, "/TM/TSC/Resume", STAMUNIT_OCCURENCES, "The number of times the TSC was resumed.");
789	#endif /* VBOX_WITH_STATISTICS */
790
791	for (VMCPUID i = 0; i < pVM->cCpus; i++)
792	{
793	PVMCPU pVCpu = pVM->apCpusR3[i];
794	STAMR3RegisterF(pVM, &pVCpu->tm.s.offTSCRawSrc, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS, "TSC offset relative the raw source", "/TM/TSC/offCPU%u", i);
795	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
796	# if defined(VBOX_WITH_STATISTICS) \|\| defined(VBOX_WITH_NS_ACCOUNTING_STATS)
797	STAMR3RegisterF(pVM, &pVCpu->tm.s.StatNsTotal, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_NS, "Resettable: Total CPU run time.", "/TM/CPU/%02u", i);
798	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);
799	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);
800	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);
801	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);
802	STAMR3RegisterF(pVM, &pVCpu->tm.s.StatNsHalted, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_NS_PER_OCCURENCE, "Resettable: Time spent halted.", "/TM/CPU/%02u/PrfHalted", i);
803	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);
804	# endif
805	STAMR3RegisterF(pVM, &pVCpu->tm.s.cNsTotalStat, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_NS, "Total CPU run time.", "/TM/CPU/%02u/cNsTotal", i);
806	STAMR3RegisterF(pVM, &pVCpu->tm.s.cNsExecuting, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_NS, "Time spent executing guest code.", "/TM/CPU/%02u/cNsExecuting", i);
807	STAMR3RegisterF(pVM, &pVCpu->tm.s.cNsHalted, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_NS, "Time spent halted.", "/TM/CPU/%02u/cNsHalted", i);
808	STAMR3RegisterF(pVM, &pVCpu->tm.s.cNsOtherStat, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_NS, "Time spent in the VMM or preempted.", "/TM/CPU/%02u/cNsOther", i);
809	STAMR3RegisterF(pVM, &pVCpu->tm.s.cPeriodsExecuting, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT, "Times executed guest code.", "/TM/CPU/%02u/cPeriodsExecuting", i);
810	STAMR3RegisterF(pVM, &pVCpu->tm.s.cPeriodsHalted, STAMTYPE_U64, STAMVISIBILITY_ALWAYS, STAMUNIT_COUNT, "Times halted.", "/TM/CPU/%02u/cPeriodsHalted", i);
811	STAMR3RegisterF(pVM, &pVCpu->tm.s.CpuLoad.cPctExecuting, STAMTYPE_U8, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "Time spent executing guest code recently.", "/TM/CPU/%02u/pctExecuting", i);
812	STAMR3RegisterF(pVM, &pVCpu->tm.s.CpuLoad.cPctHalted, STAMTYPE_U8, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "Time spent halted recently.", "/TM/CPU/%02u/pctHalted", i);
813	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);
814	#endif
815	}
816	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
817	STAMR3RegisterF(pVM, &pVM->tm.s.CpuLoad.cPctExecuting, STAMTYPE_U8, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "Time spent executing guest code recently.", "/TM/CPU/pctExecuting");
818	STAMR3RegisterF(pVM, &pVM->tm.s.CpuLoad.cPctHalted, STAMTYPE_U8, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "Time spent halted recently.", "/TM/CPU/pctHalted");
819	STAMR3RegisterF(pVM, &pVM->tm.s.CpuLoad.cPctOther, STAMTYPE_U8, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "Time spent in the VMM or preempted recently.", "/TM/CPU/pctOther");
820	#endif
821
822	#ifdef VBOX_WITH_STATISTICS
823	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.");
824	STAM_REG(pVM, (void *)&pVM->tm.s.fVirtualSyncCatchUp, STAMTYPE_U8, "/TM/VirtualSync/CatchUpActive", STAMUNIT_NONE, "Catch-Up active indicator.");
825	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)");
826	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.");
827	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGiveUp, STAMTYPE_COUNTER, "/TM/VirtualSync/GiveUp", STAMUNIT_OCCURENCES, "Times the catch-up was abandoned.");
828	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++.)");
829	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncRun, STAMTYPE_COUNTER, "/TM/VirtualSync/Run", STAMUNIT_OCCURENCES, "Times the virtual sync timer queue was considered.");
830	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncRunRestart, STAMTYPE_COUNTER, "/TM/VirtualSync/Run/Restarts", STAMUNIT_OCCURENCES, "Times the clock was restarted after a run.");
831	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.");
832	STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncRunStoppedAlready, STAMTYPE_COUNTER, "/TM/VirtualSync/Run/StoppedAlready", STAMUNIT_OCCURENCES, "Times the clock was already stopped elsewhere (TMVirtualSyncGet).");
833	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.)");
834	for (unsigned i = 0; i < RT_ELEMENTS(pVM->tm.s.aVirtualSyncCatchUpPeriods); i++)
835	{
836	STAMR3RegisterF(pVM, &pVM->tm.s.aVirtualSyncCatchUpPeriods[i].u32Percentage, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "The catch-up percentage.", "/TM/VirtualSync/Periods/%u", i);
837	STAMR3RegisterF(pVM, &pVM->tm.s.aStatVirtualSyncCatchupAdjust[i], STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Times adjusted to this period.", "/TM/VirtualSync/Periods/%u/Adjust", i);
838	STAMR3RegisterF(pVM, &pVM->tm.s.aStatVirtualSyncCatchupInitial[i], STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Times started in this period.", "/TM/VirtualSync/Periods/%u/Initial", i);
839	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);
840	}
841	#endif /* VBOX_WITH_STATISTICS */
842
843	/*
844	* Register info handlers.
845	*/
846	DBGFR3InfoRegisterInternalEx(pVM, "timers", "Dumps all timers. No arguments.", tmR3TimerInfo, DBGFINFO_FLAGS_RUN_ON_EMT);
847	DBGFR3InfoRegisterInternalEx(pVM, "activetimers", "Dumps active all timers. No arguments.", tmR3TimerInfoActive, DBGFINFO_FLAGS_RUN_ON_EMT);
848	DBGFR3InfoRegisterInternalEx(pVM, "clocks", "Display the time of the various clocks.", tmR3InfoClocks, DBGFINFO_FLAGS_RUN_ON_EMT);
849	DBGFR3InfoRegisterInternalArgv(pVM, "cpuload", "Display the CPU load stats (--help for details).", tmR3InfoCpuLoad, 0);
850
851	return VINF_SUCCESS;
852	}
853
854
855	/**
856	* Checks if the host CPU has a fixed TSC frequency.
857	*
858	* @returns true if it has, false if it hasn't.
859	*
860	* @remarks This test doesn't bother with very old CPUs that don't do power
861	* management or any other stuff that might influence the TSC rate.
862	* This isn't currently relevant.
863	*/
864	static bool tmR3HasFixedTSC(PVM pVM)
865	{
866	/*
867	* ASSUME that if the GIP is in invariant TSC mode, it's because the CPU
868	* actually has invariant TSC.
869	*
870	* In driverless mode we just assume sync TSC for now regardless of what
871	* the case actually is.
872	*/
873	PSUPGLOBALINFOPAGE const pGip = g_pSUPGlobalInfoPage;
874	SUPGIPMODE const enmGipMode = pGip ? (SUPGIPMODE)pGip->u32Mode : SUPGIPMODE_INVARIANT_TSC;
875	if (enmGipMode == SUPGIPMODE_INVARIANT_TSC)
876	return true;
877
878	/*
879	* Go by features and model info from the CPUID instruction.
880	*/
881	if (ASMHasCpuId())
882	{
883	uint32_t uEAX, uEBX, uECX, uEDX;
884
885	/*
886	* By feature. (Used to be AMD specific, intel seems to have picked it up.)
887	*/
888	ASMCpuId(0x80000000, &uEAX, &uEBX, &uECX, &uEDX);
889	if (uEAX >= 0x80000007 && ASMIsValidExtRange(uEAX))
890	{
891	ASMCpuId(0x80000007, &uEAX, &uEBX, &uECX, &uEDX);
892	if ( (uEDX & X86_CPUID_AMD_ADVPOWER_EDX_TSCINVAR) /* TscInvariant */
893	&& enmGipMode != SUPGIPMODE_ASYNC_TSC) /* No fixed tsc if the gip timer is in async mode. */
894	return true;
895	}
896
897	/*
898	* By model.
899	*/
900	if (CPUMGetHostCpuVendor(pVM) == CPUMCPUVENDOR_AMD)
901	{
902	/*
903	* AuthenticAMD - Check for APM support and that TscInvariant is set.
904	*
905	* This test isn't correct with respect to fixed/non-fixed TSC and
906	* older models, but this isn't relevant since the result is currently
907	* only used for making a decision on AMD-V models.
908	*/
909	#if 0 /* Promoted to generic */
910	ASMCpuId(0x80000000, &uEAX, &uEBX, &uECX, &uEDX);
911	if (uEAX >= 0x80000007)
912	{
913	ASMCpuId(0x80000007, &uEAX, &uEBX, &uECX, &uEDX);
914	if ( (uEDX & X86_CPUID_AMD_ADVPOWER_EDX_TSCINVAR) /* TscInvariant */
915	&& ( enmGipMode == SUPGIPMODE_SYNC_TSC /* No fixed tsc if the gip timer is in async mode. */
916	\|\| enmGipMode == SUPGIPMODE_INVARIANT_TSC))
917	return true;
918	}
919	#endif
920	}
921	else if (CPUMGetHostCpuVendor(pVM) == CPUMCPUVENDOR_INTEL)
922	{
923	/*
924	* GenuineIntel - Check the model number.
925	*
926	* This test is lacking in the same way and for the same reasons
927	* as the AMD test above.
928	*/
929	/** @todo use ASMGetCpuFamily() and ASMGetCpuModel() here. */
930	ASMCpuId(1, &uEAX, &uEBX, &uECX, &uEDX);
931	unsigned uModel = (uEAX >> 4) & 0x0f;
932	unsigned uFamily = (uEAX >> 8) & 0x0f;
933	if (uFamily == 0x0f)
934	uFamily += (uEAX >> 20) & 0xff;
935	if (uFamily >= 0x06)
936	uModel += ((uEAX >> 16) & 0x0f) << 4;
937	if ( (uFamily == 0x0f /P4/ && uModel >= 0x03)
938	\|\| (uFamily == 0x06 /P2/P3/ && uModel >= 0x0e))
939	return true;
940	}
941	else if (CPUMGetHostCpuVendor(pVM) == CPUMCPUVENDOR_VIA)
942	{
943	/*
944	* CentaurHauls - Check the model, family and stepping.
945	*
946	* This only checks for VIA CPU models Nano X2, Nano X3,
947	* Eden X2 and QuadCore.
948	*/
949	/** @todo use ASMGetCpuFamily() and ASMGetCpuModel() here. */
950	ASMCpuId(1, &uEAX, &uEBX, &uECX, &uEDX);
951	unsigned uStepping = (uEAX & 0x0f);
952	unsigned uModel = (uEAX >> 4) & 0x0f;
953	unsigned uFamily = (uEAX >> 8) & 0x0f;
954	if ( uFamily == 0x06
955	&& uModel == 0x0f
956	&& uStepping >= 0x0c
957	&& uStepping <= 0x0f)
958	return true;
959	}
960	else if (CPUMGetHostCpuVendor(pVM) == CPUMCPUVENDOR_SHANGHAI)
961	{
962	/*
963	* Shanghai - Check the model, family and stepping.
964	*/
965	/** @todo use ASMGetCpuFamily() and ASMGetCpuModel() here. */
966	ASMCpuId(1, &uEAX, &uEBX, &uECX, &uEDX);
967	unsigned uFamily = (uEAX >> 8) & 0x0f;
968	if ( uFamily == 0x06
969	\|\| uFamily == 0x07)
970	{
971	return true;
972	}
973	}
974	}
975	return false;
976	}
977
978
979	/**
980	* Calibrate the CPU tick.
981	*
982	* @returns Number of ticks per second.
983	*/
984	static uint64_t tmR3CalibrateTSC(void)
985	{
986	uint64_t u64Hz;
987
988	/*
989	* Use GIP when available. Prefere the nominal one, no need to wait for it.
990	*/
991	PSUPGLOBALINFOPAGE pGip = g_pSUPGlobalInfoPage;
992	if (pGip)
993	{
994	u64Hz = pGip->u64CpuHz;
995	if (u64Hz < _1T && u64Hz > _1M)
996	return u64Hz;
997	AssertFailed(); /* This shouldn't happen. */
998
999	u64Hz = SUPGetCpuHzFromGip(pGip);
1000	if (u64Hz < _1T && u64Hz > _1M)
1001	return u64Hz;
1002
1003	AssertFailed(); /* This shouldn't happen. */
1004	}
1005	else
1006	Assert(SUPR3IsDriverless());
1007
1008	/* Call this once first to make sure it's initialized. */
1009	RTTimeNanoTS();
1010
1011	/*
1012	* Yield the CPU to increase our chances of getting a correct value.
1013	*/
1014	RTThreadYield(); /* Try avoid interruptions between TSC and NanoTS samplings. */
1015	static const unsigned s_auSleep[5] = { 50, 30, 30, 40, 40 };
1016	uint64_t au64Samples[5];
1017	unsigned i;
1018	for (i = 0; i < RT_ELEMENTS(au64Samples); i++)
1019	{
1020	RTMSINTERVAL cMillies;
1021	int cTries = 5;
1022	uint64_t u64Start = ASMReadTSC();
1023	uint64_t u64End;
1024	uint64_t StartTS = RTTimeNanoTS();
1025	uint64_t EndTS;
1026	do
1027	{
1028	RTThreadSleep(s_auSleep[i]);
1029	u64End = ASMReadTSC();
1030	EndTS = RTTimeNanoTS();
1031	cMillies = (RTMSINTERVAL)((EndTS - StartTS + 500000) / 1000000);
1032	} while ( cMillies == 0 /* the sleep may be interrupted... */
1033	\|\| (cMillies < 20 && --cTries > 0));
1034	uint64_t u64Diff = u64End - u64Start;
1035
1036	au64Samples[i] = (u64Diff * 1000) / cMillies;
1037	AssertMsg(cTries > 0, ("cMillies=%d i=%d\n", cMillies, i));
1038	}
1039
1040	/*
1041	* Discard the highest and lowest results and calculate the average.
1042	*/
1043	unsigned iHigh = 0;
1044	unsigned iLow = 0;
1045	for (i = 1; i < RT_ELEMENTS(au64Samples); i++)
1046	{
1047	if (au64Samples[i] < au64Samples[iLow])
1048	iLow = i;
1049	if (au64Samples[i] > au64Samples[iHigh])
1050	iHigh = i;
1051	}
1052	au64Samples[iLow] = 0;
1053	au64Samples[iHigh] = 0;
1054
1055	u64Hz = au64Samples[0];
1056	for (i = 1; i < RT_ELEMENTS(au64Samples); i++)
1057	u64Hz += au64Samples[i];
1058	u64Hz /= RT_ELEMENTS(au64Samples) - 2;
1059
1060	return u64Hz;
1061	}
1062
1063
1064	/**
1065	* Finalizes the TM initialization.
1066	*
1067	* @returns VBox status code.
1068	* @param pVM The cross context VM structure.
1069	*/
1070	VMM_INT_DECL(int) TMR3InitFinalize(PVM pVM)
1071	{
1072	int rc;
1073
1074	/*
1075	* Resolve symbols, unless we're in driverless mode.
1076	*/
1077	if (!SUPR3IsDriverless())
1078	{
1079	rc = PDMR3LdrGetSymbolR0(pVM, NULL, "tmVirtualNanoTSBad", &pVM->tm.s.VirtualGetRawDataR0.pfnBad);
1080	AssertRCReturn(rc, rc);
1081	rc = PDMR3LdrGetSymbolR0(pVM, NULL, "tmVirtualNanoTSBadCpuIndex", &pVM->tm.s.VirtualGetRawDataR0.pfnBadCpuIndex);
1082	AssertRCReturn(rc, rc);
1083	rc = PDMR3LdrGetSymbolR0(pVM, NULL, "tmVirtualNanoTSRediscover", &pVM->tm.s.VirtualGetRawDataR0.pfnRediscover);
1084	AssertRCReturn(rc, rc);
1085	pVM->tm.s.pfnVirtualGetRawR0 = pVM->tm.s.VirtualGetRawDataR0.pfnRediscover;
1086	}
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) && !VM_IS_RAW_MODE_ENABLED(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	}
1273	}
1274
1275
1276	/**
1277	* Execute state save operation.
1278	*
1279	* @returns VBox status code.
1280	* @param pVM The cross context VM structure.
1281	* @param pSSM SSM operation handle.
1282	*/
1283	static DECLCALLBACK(int) tmR3Save(PVM pVM, PSSMHANDLE pSSM)
1284	{
1285	LogFlow(("tmR3Save:\n"));
1286	#ifdef VBOX_STRICT
1287	for (VMCPUID i = 0; i < pVM->cCpus; i++)
1288	{
1289	PVMCPU pVCpu = pVM->apCpusR3[i];
1290	Assert(!pVCpu->tm.s.fTSCTicking);
1291	}
1292	Assert(!pVM->tm.s.cVirtualTicking);
1293	Assert(!pVM->tm.s.fVirtualSyncTicking);
1294	Assert(!pVM->tm.s.cTSCsTicking);
1295	#endif
1296
1297	/*
1298	* Save the virtual clocks.
1299	*/
1300	/* the virtual clock. */
1301	SSMR3PutU64(pSSM, TMCLOCK_FREQ_VIRTUAL);
1302	SSMR3PutU64(pSSM, pVM->tm.s.u64Virtual);
1303
1304	/* the virtual timer synchronous clock. */
1305	SSMR3PutU64(pSSM, pVM->tm.s.u64VirtualSync);
1306	SSMR3PutU64(pSSM, pVM->tm.s.offVirtualSync);
1307	SSMR3PutU64(pSSM, pVM->tm.s.offVirtualSyncGivenUp);
1308	SSMR3PutU64(pSSM, pVM->tm.s.u64VirtualSyncCatchUpPrev);
1309	SSMR3PutBool(pSSM, pVM->tm.s.fVirtualSyncCatchUp);
1310
1311	/* real time clock */
1312	SSMR3PutU64(pSSM, TMCLOCK_FREQ_REAL);
1313
1314	/* the cpu tick clock. */
1315	for (VMCPUID i = 0; i < pVM->cCpus; i++)
1316	{
1317	PVMCPU pVCpu = pVM->apCpusR3[i];
1318	SSMR3PutU64(pSSM, TMCpuTickGet(pVCpu));
1319	}
1320	return SSMR3PutU64(pSSM, pVM->tm.s.cTSCTicksPerSecond);
1321	}
1322
1323
1324	/**
1325	* Execute state load operation.
1326	*
1327	* @returns VBox status code.
1328	* @param pVM The cross context VM structure.
1329	* @param pSSM SSM operation handle.
1330	* @param uVersion Data layout version.
1331	* @param uPass The data pass.
1332	*/
1333	static DECLCALLBACK(int) tmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
1334	{
1335	LogFlow(("tmR3Load:\n"));
1336
1337	Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
1338	#ifdef VBOX_STRICT
1339	for (VMCPUID i = 0; i < pVM->cCpus; i++)
1340	{
1341	PVMCPU pVCpu = pVM->apCpusR3[i];
1342	Assert(!pVCpu->tm.s.fTSCTicking);
1343	}
1344	Assert(!pVM->tm.s.cVirtualTicking);
1345	Assert(!pVM->tm.s.fVirtualSyncTicking);
1346	Assert(!pVM->tm.s.cTSCsTicking);
1347	#endif
1348
1349	/*
1350	* Validate version.
1351	*/
1352	if (uVersion != TM_SAVED_STATE_VERSION)
1353	{
1354	AssertMsgFailed(("tmR3Load: Invalid version uVersion=%d!\n", uVersion));
1355	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
1356	}
1357
1358	/*
1359	* Load the virtual clock.
1360	*/
1361	pVM->tm.s.cVirtualTicking = 0;
1362	/* the virtual clock. */
1363	uint64_t u64Hz;
1364	int rc = SSMR3GetU64(pSSM, &u64Hz);
1365	if (RT_FAILURE(rc))
1366	return rc;
1367	if (u64Hz != TMCLOCK_FREQ_VIRTUAL)
1368	{
1369	AssertMsgFailed(("The virtual clock frequency differs! Saved: %'RU64 Binary: %'RU64\n",
1370	u64Hz, TMCLOCK_FREQ_VIRTUAL));
1371	return VERR_SSM_VIRTUAL_CLOCK_HZ;
1372	}
1373	SSMR3GetU64(pSSM, &pVM->tm.s.u64Virtual);
1374	pVM->tm.s.u64VirtualOffset = 0;
1375
1376	/* the virtual timer synchronous clock. */
1377	pVM->tm.s.fVirtualSyncTicking = false;
1378	uint64_t u64;
1379	SSMR3GetU64(pSSM, &u64);
1380	pVM->tm.s.u64VirtualSync = u64;
1381	SSMR3GetU64(pSSM, &u64);
1382	pVM->tm.s.offVirtualSync = u64;
1383	SSMR3GetU64(pSSM, &u64);
1384	pVM->tm.s.offVirtualSyncGivenUp = u64;
1385	SSMR3GetU64(pSSM, &u64);
1386	pVM->tm.s.u64VirtualSyncCatchUpPrev = u64;
1387	bool f;
1388	SSMR3GetBool(pSSM, &f);
1389	pVM->tm.s.fVirtualSyncCatchUp = f;
1390
1391	/* the real clock */
1392	rc = SSMR3GetU64(pSSM, &u64Hz);
1393	if (RT_FAILURE(rc))
1394	return rc;
1395	if (u64Hz != TMCLOCK_FREQ_REAL)
1396	{
1397	AssertMsgFailed(("The real clock frequency differs! Saved: %'RU64 Binary: %'RU64\n",
1398	u64Hz, TMCLOCK_FREQ_REAL));
1399	return VERR_SSM_VIRTUAL_CLOCK_HZ; /* misleading... */
1400	}
1401
1402	/* the cpu tick clock. */
1403	pVM->tm.s.cTSCsTicking = 0;
1404	pVM->tm.s.offTSCPause = 0;
1405	pVM->tm.s.u64LastPausedTSC = 0;
1406	for (VMCPUID i = 0; i < pVM->cCpus; i++)
1407	{
1408	PVMCPU pVCpu = pVM->apCpusR3[i];
1409
1410	pVCpu->tm.s.fTSCTicking = false;
1411	SSMR3GetU64(pSSM, &pVCpu->tm.s.u64TSC);
1412	if (pVM->tm.s.u64LastPausedTSC < pVCpu->tm.s.u64TSC)
1413	pVM->tm.s.u64LastPausedTSC = pVCpu->tm.s.u64TSC;
1414
1415	if (pVM->tm.s.enmTSCMode == TMTSCMODE_REAL_TSC_OFFSET)
1416	pVCpu->tm.s.offTSCRawSrc = 0; /** @todo TSC restore stuff and HWACC. */
1417	}
1418
1419	rc = SSMR3GetU64(pSSM, &u64Hz);
1420	if (RT_FAILURE(rc))
1421	return rc;
1422	if (pVM->tm.s.enmTSCMode != TMTSCMODE_REAL_TSC_OFFSET)
1423	pVM->tm.s.cTSCTicksPerSecond = u64Hz;
1424
1425	LogRel(("TM: cTSCTicksPerSecond=%#RX64 (%'RU64) enmTSCMode=%d (%s) (state load)\n",
1426	pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.enmTSCMode, tmR3GetTSCModeName(pVM)));
1427
1428	/* Disabled as this isn't tested, also should this apply only if GIM is enabled etc. */
1429	#if 0
1430	/*
1431	* If the current host TSC frequency is incompatible with what is in the
1432	* saved state of the VM, fall back to emulating TSC and disallow TSC mode
1433	* switches during VM runtime (e.g. by GIM).
1434	*/
1435	if ( GIMIsEnabled(pVM)
1436	\|\| pVM->tm.s.enmTSCMode == TMTSCMODE_REAL_TSC_OFFSET)
1437	{
1438	uint64_t uGipCpuHz;
1439	bool fRelax = RTSystemIsInsideVM();
1440	bool fCompat = SUPIsTscFreqCompatible(pVM->tm.s.cTSCTicksPerSecond, &uGipCpuHz, fRelax);
1441	if (!fCompat)
1442	{
1443	pVM->tm.s.enmTSCMode = TMTSCMODE_VIRT_TSC_EMULATED;
1444	pVM->tm.s.fTSCModeSwitchAllowed = false;
1445	if (g_pSUPGlobalInfoPage->u32Mode != SUPGIPMODE_ASYNC_TSC)
1446	{
1447	LogRel(("TM: TSC frequency incompatible! uGipCpuHz=%#RX64 (%'RU64) enmTSCMode=%d (%s) fTSCModeSwitchAllowed=%RTbool (state load)\n",
1448	uGipCpuHz, uGipCpuHz, pVM->tm.s.enmTSCMode, tmR3GetTSCModeName(pVM), pVM->tm.s.fTSCModeSwitchAllowed));
1449	}
1450	else
1451	{
1452	LogRel(("TM: GIP is async, enmTSCMode=%d (%s) fTSCModeSwitchAllowed=%RTbool (state load)\n",
1453	uGipCpuHz, uGipCpuHz, pVM->tm.s.enmTSCMode, tmR3GetTSCModeName(pVM), pVM->tm.s.fTSCModeSwitchAllowed));
1454	}
1455	}
1456	}
1457	#endif
1458
1459	/*
1460	* Make sure timers get rescheduled immediately.
1461	*/
1462	PVMCPU pVCpuDst = pVM->apCpusR3[pVM->tm.s.idTimerCpu];
1463	VMCPU_FF_SET(pVCpuDst, VMCPU_FF_TIMER);
1464
1465	return VINF_SUCCESS;
1466	}
1467
1468	#ifdef VBOX_WITH_STATISTICS
1469
1470	/**
1471	* Register statistics for a timer.
1472	*
1473	* @param pVM The cross context VM structure.
1474	* @param pQueue The queue the timer belongs to.
1475	* @param pTimer The timer to register statistics for.
1476	*/
1477	static void tmR3TimerRegisterStats(PVM pVM, PTMTIMERQUEUE pQueue, PTMTIMER pTimer)
1478	{
1479	STAMR3RegisterF(pVM, &pTimer->StatTimer, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS_PER_CALL,
1480	pQueue->szName, "/TM/Timers/%s", pTimer->szName);
1481	STAMR3RegisterF(pVM, &pTimer->StatCritSectEnter, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS_PER_CALL,
1482	"", "/TM/Timers/%s/CritSectEnter", pTimer->szName);
1483	STAMR3RegisterF(pVM, &pTimer->StatGet, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS,
1484	"", "/TM/Timers/%s/Get", pTimer->szName);
1485	STAMR3RegisterF(pVM, &pTimer->StatSetAbsolute, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS,
1486	"", "/TM/Timers/%s/SetAbsolute", pTimer->szName);
1487	STAMR3RegisterF(pVM, &pTimer->StatSetRelative, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS,
1488	"", "/TM/Timers/%s/SetRelative", pTimer->szName);
1489	STAMR3RegisterF(pVM, &pTimer->StatStop, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_CALLS,
1490	"", "/TM/Timers/%s/Stop", pTimer->szName);
1491	}
1492
1493
1494	/**
1495	* Deregister the statistics for a timer.
1496	*/
1497	static void tmR3TimerDeregisterStats(PVM pVM, PTMTIMER pTimer)
1498	{
1499	char szPrefix[128];
1500	size_t cchPrefix = RTStrPrintf(szPrefix, sizeof(szPrefix), "/TM/Timers/%s/", pTimer->szName);
1501	STAMR3DeregisterByPrefix(pVM->pUVM, szPrefix);
1502	szPrefix[cchPrefix - 1] = '\0';
1503	STAMR3Deregister(pVM->pUVM, szPrefix);
1504	}
1505
1506
1507	/**
1508	* Register statistics for all allocated timers in a queue.
1509	*
1510	* @param pVM The cross context VM structure.
1511	* @param pQueue The queue to register statistics for.
1512	* @param cTimers Number of timers to consider (in growth scenario).
1513	*/
1514	static void tmR3TimerQueueRegisterStats(PVM pVM, PTMTIMERQUEUE pQueue, uint32_t cTimers)
1515	{
1516	uint32_t idxTimer = RT_MIN(cTimers, pQueue->cTimersAlloc);
1517	while (idxTimer-- > 0)
1518	{
1519	PTMTIMER pTimer = &pQueue->paTimers[idxTimer];
1520	TMTIMERSTATE enmState = pTimer->enmState;
1521	if (enmState > TMTIMERSTATE_INVALID && enmState < TMTIMERSTATE_DESTROY)
1522	tmR3TimerRegisterStats(pVM, pQueue, pTimer);
1523	}
1524	}
1525
1526	#endif /* VBOX_WITH_STATISTICS */
1527
1528
1529	/**
1530	* Grows a timer queue.
1531	*
1532	* @returns VBox status code (errors are LogRel'ed already).
1533	* @param pVM The cross context VM structure.
1534	* @param pQueue The timer queue to grow.
1535	* @param cNewTimers The minimum number of timers after growing.
1536	* @note Caller owns the queue's allocation lock.
1537	*/
1538	static int tmR3TimerQueueGrow(PVM pVM, PTMTIMERQUEUE pQueue, uint32_t cNewTimers)
1539	{
1540	/*
1541	* Validate input and state.
1542	*/
1543	VM_ASSERT_EMT0_RETURN(pVM, VERR_VM_THREAD_NOT_EMT);
1544	VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_VM_INVALID_VM_STATE); /** @todo must do better than this! */
1545	AssertReturn(!pQueue->fCannotGrow, VERR_TM_TIMER_QUEUE_CANNOT_GROW);
1546
1547	uint32_t const cOldEntries = pQueue->cTimersAlloc;
1548	AssertReturn(cNewTimers > cOldEntries, VERR_TM_IPE_1);
1549	AssertReturn(cNewTimers < _32K, VERR_TM_IPE_1);
1550
1551	/*
1552	* Do the growing.
1553	*/
1554	int rc;
1555	if (!SUPR3IsDriverless())
1556	{
1557	rc = VMMR3CallR0Emt(pVM, VMMGetCpu(pVM), VMMR0_DO_TM_GROW_TIMER_QUEUE,
1558	RT_MAKE_U64(cNewTimers, (uint64_t)(pQueue - &pVM->tm.s.aTimerQueues[0])), NULL);
1559	AssertLogRelRCReturn(rc, rc);
1560	AssertReturn(pQueue->cTimersAlloc >= cNewTimers, VERR_TM_IPE_3);
1561	}
1562	else
1563	{
1564	AssertReturn(cNewTimers <= _32K && cOldEntries <= _32K, VERR_TM_TOO_MANY_TIMERS);
1565	ASMCompilerBarrier();
1566
1567	/*
1568	* Round up the request to the nearest page and do the allocation.
1569	*/
1570	size_t cbNew = sizeof(TMTIMER) * cNewTimers;
1571	cbNew = RT_ALIGN_Z(cbNew, PAGE_SIZE);
1572	cNewTimers = (uint32_t)(cbNew / sizeof(TMTIMER));
1573
1574	PTMTIMER paTimers = (PTMTIMER)RTMemPageAllocZ(cbNew);
1575	if (paTimers)
1576	{
1577	/*
1578	* Copy over the old timer, init the new free ones, then switch over
1579	* and free the old ones.
1580	*/
1581	PTMTIMER const paOldTimers = pQueue->paTimers;
1582	tmHCTimerQueueGrowInit(paTimers, paOldTimers, cNewTimers, cOldEntries);
1583
1584	pQueue->paTimers = paTimers;
1585	pQueue->cTimersAlloc = cNewTimers;
1586	pQueue->cTimersFree += cNewTimers - (cOldEntries ? cOldEntries : 1);
1587
1588	RTMemPageFree(paOldTimers, RT_ALIGN_Z(sizeof(TMTIMER) * cOldEntries, PAGE_SIZE));
1589	rc = VINF_SUCCESS;
1590	}
1591	else
1592	rc = VERR_NO_PAGE_MEMORY;
1593	}
1594	return rc;
1595	}
1596
1597
1598	/**
1599	* Internal TMR3TimerCreate worker.
1600	*
1601	* @returns VBox status code.
1602	* @param pVM The cross context VM structure.
1603	* @param enmClock The timer clock.
1604	* @param fFlags TMTIMER_FLAGS_XXX.
1605	* @param pszName The timer name.
1606	* @param ppTimer Where to store the timer pointer on success.
1607	*/
1608	static int tmr3TimerCreate(PVM pVM, TMCLOCK enmClock, uint32_t fFlags, const char *pszName, PPTMTIMERR3 ppTimer)
1609	{
1610	PTMTIMER pTimer;
1611
1612	/*
1613	* Validate input.
1614	*/
1615	VM_ASSERT_EMT(pVM);
1616
1617	AssertReturn((fFlags & (TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0)) != (TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0),
1618	VERR_INVALID_FLAGS);
1619
1620	AssertPtrReturn(pszName, VERR_INVALID_POINTER);
1621	size_t const cchName = strlen(pszName);
1622	AssertMsgReturn(cchName < sizeof(pTimer->szName), ("timer name too long: %s\n", pszName), VERR_INVALID_NAME);
1623	AssertMsgReturn(cchName > 2, ("Too short timer name: %s\n", pszName), VERR_INVALID_NAME);
1624
1625	AssertMsgReturn(enmClock >= TMCLOCK_REAL && enmClock < TMCLOCK_MAX,
1626	("%d\n", enmClock), VERR_INVALID_PARAMETER);
1627	AssertReturn(enmClock != TMCLOCK_TSC, VERR_NOT_SUPPORTED);
1628	if (enmClock == TMCLOCK_VIRTUAL_SYNC)
1629	VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_WRONG_ORDER);
1630
1631	/*
1632	* Exclusively lock the queue.
1633	*
1634	* Note! This means that it is not possible to allocate timers from a timer callback.
1635	*/
1636	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[enmClock];
1637	int rc = PDMCritSectRwEnterExcl(pVM, &pQueue->AllocLock, VERR_IGNORED);
1638	AssertRCReturn(rc, rc);
1639
1640	/*
1641	* Allocate the timer.
1642	*/
1643	if (!pQueue->cTimersFree)
1644	{
1645	rc = tmR3TimerQueueGrow(pVM, pQueue, pQueue->cTimersAlloc + 64);
1646	AssertRCReturnStmt(rc, PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock), rc);
1647	}
1648
1649	/* Scan the array for free timers. */
1650	pTimer = NULL;
1651	PTMTIMER const paTimers = pQueue->paTimers;
1652	uint32_t const cTimersAlloc = pQueue->cTimersAlloc;
1653	uint32_t idxTimer = pQueue->idxFreeHint;
1654	for (uint32_t iScan = 0; iScan < 2; iScan++)
1655	{
1656	while (idxTimer < cTimersAlloc)
1657	{
1658	if (paTimers[idxTimer].enmState == TMTIMERSTATE_FREE)
1659	{
1660	pTimer = &paTimers[idxTimer];
1661	pQueue->idxFreeHint = idxTimer + 1;
1662	break;
1663	}
1664	idxTimer++;
1665	}
1666	if (pTimer != NULL)
1667	break;
1668	idxTimer = 1;
1669	}
1670	AssertLogRelMsgReturnStmt(pTimer != NULL, ("cTimersFree=%u cTimersAlloc=%u enmClock=%s\n", pQueue->cTimersFree,
1671	pQueue->cTimersAlloc, pQueue->szName),
1672	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock), VERR_INTERNAL_ERROR_3);
1673	pQueue->cTimersFree -= 1;
1674
1675	/*
1676	* Initialize it.
1677	*/
1678	Assert(idxTimer != 0);
1679	Assert(idxTimer <= TMTIMERHANDLE_TIMER_IDX_MASK);
1680	pTimer->hSelf = idxTimer
1681	\| ((uintptr_t)(pQueue - &pVM->tm.s.aTimerQueues[0]) << TMTIMERHANDLE_QUEUE_IDX_SHIFT);
1682	Assert(!(pTimer->hSelf & TMTIMERHANDLE_RANDOM_MASK));
1683	pTimer->hSelf \|= (RTRandU64() & TMTIMERHANDLE_RANDOM_MASK);
1684
1685	pTimer->u64Expire = 0;
1686	pTimer->enmState = TMTIMERSTATE_STOPPED;
1687	pTimer->idxScheduleNext = UINT32_MAX;
1688	pTimer->idxNext = UINT32_MAX;
1689	pTimer->idxPrev = UINT32_MAX;
1690	pTimer->fFlags = fFlags;
1691	pTimer->uHzHint = 0;
1692	pTimer->pvUser = NULL;
1693	pTimer->pCritSect = NULL;
1694	memcpy(pTimer->szName, pszName, cchName);
1695	pTimer->szName[cchName] = '\0';
1696
1697	#ifdef VBOX_STRICT
1698	tmTimerQueuesSanityChecks(pVM, "tmR3TimerCreate");
1699	#endif
1700
1701	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
1702
1703	#ifdef VBOX_WITH_STATISTICS
1704	/*
1705	* Only register statistics if we're passed the no-realloc point.
1706	*/
1707	if (pQueue->fCannotGrow)
1708	tmR3TimerRegisterStats(pVM, pQueue, pTimer);
1709	#endif
1710
1711	*ppTimer = pTimer;
1712	return VINF_SUCCESS;
1713	}
1714
1715
1716	/**
1717	* Creates a device timer.
1718	*
1719	* @returns VBox status code.
1720	* @param pVM The cross context VM structure.
1721	* @param pDevIns Device instance.
1722	* @param enmClock The clock to use on this timer.
1723	* @param pfnCallback Callback function.
1724	* @param pvUser The user argument to the callback.
1725	* @param fFlags Timer creation flags, see grp_tm_timer_flags.
1726	* @param pszName Timer name (will be copied). Max 31 chars.
1727	* @param phTimer Where to store the timer handle on success.
1728	*/
1729	VMM_INT_DECL(int) TMR3TimerCreateDevice(PVM pVM, PPDMDEVINS pDevIns, TMCLOCK enmClock,
1730	PFNTMTIMERDEV pfnCallback, void *pvUser,
1731	uint32_t fFlags, const char *pszName, PTMTIMERHANDLE phTimer)
1732	{
1733	AssertReturn(!(fFlags & ~(TMTIMER_FLAGS_NO_CRIT_SECT \| TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0)),
1734	VERR_INVALID_FLAGS);
1735
1736	/*
1737	* Allocate and init stuff.
1738	*/
1739	PTMTIMER pTimer;
1740	int rc = tmr3TimerCreate(pVM, enmClock, fFlags, pszName, &pTimer);
1741	if (RT_SUCCESS(rc))
1742	{
1743	pTimer->enmType = TMTIMERTYPE_DEV;
1744	pTimer->u.Dev.pfnTimer = pfnCallback;
1745	pTimer->u.Dev.pDevIns = pDevIns;
1746	pTimer->pvUser = pvUser;
1747	if (!(fFlags & TMTIMER_FLAGS_NO_CRIT_SECT))
1748	pTimer->pCritSect = PDMR3DevGetCritSect(pVM, pDevIns);
1749	*phTimer = pTimer->hSelf;
1750	Log(("TM: Created device timer %p clock %d callback %p '%s'\n", phTimer, enmClock, pfnCallback, pszName));
1751	}
1752
1753	return rc;
1754	}
1755
1756
1757
1758
1759	/**
1760	* Creates a USB device timer.
1761	*
1762	* @returns VBox status code.
1763	* @param pVM The cross context VM structure.
1764	* @param pUsbIns The USB device instance.
1765	* @param enmClock The clock to use on this timer.
1766	* @param pfnCallback Callback function.
1767	* @param pvUser The user argument to the callback.
1768	* @param fFlags Timer creation flags, see grp_tm_timer_flags.
1769	* @param pszName Timer name (will be copied). Max 31 chars.
1770	* @param phTimer Where to store the timer handle on success.
1771	*/
1772	VMM_INT_DECL(int) TMR3TimerCreateUsb(PVM pVM, PPDMUSBINS pUsbIns, TMCLOCK enmClock,
1773	PFNTMTIMERUSB pfnCallback, void *pvUser,
1774	uint32_t fFlags, const char *pszName, PTMTIMERHANDLE phTimer)
1775	{
1776	AssertReturn(!(fFlags & ~(TMTIMER_FLAGS_NO_CRIT_SECT \| TMTIMER_FLAGS_NO_RING0)), VERR_INVALID_PARAMETER);
1777
1778	/*
1779	* Allocate and init stuff.
1780	*/
1781	PTMTIMER pTimer;
1782	int rc = tmr3TimerCreate(pVM, enmClock, fFlags, pszName, &pTimer);
1783	if (RT_SUCCESS(rc))
1784	{
1785	pTimer->enmType = TMTIMERTYPE_USB;
1786	pTimer->u.Usb.pfnTimer = pfnCallback;
1787	pTimer->u.Usb.pUsbIns = pUsbIns;
1788	pTimer->pvUser = pvUser;
1789	//if (!(fFlags & TMTIMER_FLAGS_NO_CRIT_SECT))
1790	//{
1791	// if (pDevIns->pCritSectR3)
1792	// pTimer->pCritSect = pUsbIns->pCritSectR3;
1793	// else
1794	// pTimer->pCritSect = IOMR3GetCritSect(pVM);
1795	//}
1796	*phTimer = pTimer->hSelf;
1797	Log(("TM: Created USB device timer %p clock %d callback %p '%s'\n", *phTimer, enmClock, pfnCallback, pszName));
1798	}
1799
1800	return rc;
1801	}
1802
1803
1804	/**
1805	* Creates a driver timer.
1806	*
1807	* @returns VBox status code.
1808	* @param pVM The cross context VM structure.
1809	* @param pDrvIns Driver instance.
1810	* @param enmClock The clock to use on this timer.
1811	* @param pfnCallback Callback function.
1812	* @param pvUser The user argument to the callback.
1813	* @param fFlags Timer creation flags, see grp_tm_timer_flags.
1814	* @param pszName Timer name (will be copied). Max 31 chars.
1815	* @param phTimer Where to store the timer handle on success.
1816	*/
1817	VMM_INT_DECL(int) TMR3TimerCreateDriver(PVM pVM, PPDMDRVINS pDrvIns, TMCLOCK enmClock, PFNTMTIMERDRV pfnCallback, void *pvUser,
1818	uint32_t fFlags, const char *pszName, PTMTIMERHANDLE phTimer)
1819	{
1820	AssertReturn(!(fFlags & ~(TMTIMER_FLAGS_NO_CRIT_SECT \| TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0)),
1821	VERR_INVALID_FLAGS);
1822
1823	/*
1824	* Allocate and init stuff.
1825	*/
1826	PTMTIMER pTimer;
1827	int rc = tmr3TimerCreate(pVM, enmClock, fFlags, pszName, &pTimer);
1828	if (RT_SUCCESS(rc))
1829	{
1830	pTimer->enmType = TMTIMERTYPE_DRV;
1831	pTimer->u.Drv.pfnTimer = pfnCallback;
1832	pTimer->u.Drv.pDrvIns = pDrvIns;
1833	pTimer->pvUser = pvUser;
1834	*phTimer = pTimer->hSelf;
1835	Log(("TM: Created device timer %p clock %d callback %p '%s'\n", *phTimer, enmClock, pfnCallback, pszName));
1836	}
1837
1838	return rc;
1839	}
1840
1841
1842	/**
1843	* Creates an internal timer.
1844	*
1845	* @returns VBox status code.
1846	* @param pVM The cross context VM structure.
1847	* @param enmClock The clock to use on this timer.
1848	* @param pfnCallback Callback function.
1849	* @param pvUser User argument to be passed to the callback.
1850	* @param fFlags Timer creation flags, see grp_tm_timer_flags.
1851	* @param pszName Timer name (will be copied). Max 31 chars.
1852	* @param phTimer Where to store the timer handle on success.
1853	*/
1854	VMMR3DECL(int) TMR3TimerCreate(PVM pVM, TMCLOCK enmClock, PFNTMTIMERINT pfnCallback, void *pvUser,
1855	uint32_t fFlags, const char *pszName, PTMTIMERHANDLE phTimer)
1856	{
1857	AssertReturn(fFlags & (TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0), VERR_INVALID_FLAGS);
1858	AssertReturn((fFlags & (TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0)) != (TMTIMER_FLAGS_RING0 \| TMTIMER_FLAGS_NO_RING0),
1859	VERR_INVALID_FLAGS);
1860
1861	/*
1862	* Allocate and init stuff.
1863	*/
1864	PTMTIMER pTimer;
1865	int rc = tmr3TimerCreate(pVM, enmClock, fFlags, pszName, &pTimer);
1866	if (RT_SUCCESS(rc))
1867	{
1868	pTimer->enmType = TMTIMERTYPE_INTERNAL;
1869	pTimer->u.Internal.pfnTimer = pfnCallback;
1870	pTimer->pvUser = pvUser;
1871	*phTimer = pTimer->hSelf;
1872	Log(("TM: Created internal timer %p clock %d callback %p '%s'\n", pTimer, enmClock, pfnCallback, pszName));
1873	}
1874
1875	return rc;
1876	}
1877
1878
1879	/**
1880	* Destroy a timer
1881	*
1882	* @returns VBox status code.
1883	* @param pVM The cross context VM structure.
1884	* @param pQueue The queue the timer is on.
1885	* @param pTimer Timer handle as returned by one of the create functions.
1886	*/
1887	static int tmR3TimerDestroy(PVMCC pVM, PTMTIMERQUEUE pQueue, PTMTIMER pTimer)
1888	{
1889	bool fActive = false;
1890	bool fPending = false;
1891
1892	AssertMsg( !pTimer->pCritSect
1893	\|\| VMR3GetState(pVM) != VMSTATE_RUNNING
1894	\|\| PDMCritSectIsOwner(pVM, pTimer->pCritSect), ("%s\n", pTimer->szName));
1895
1896	/*
1897	* The rest of the game happens behind the lock, just
1898	* like create does. All the work is done here.
1899	*/
1900	PDMCritSectRwEnterExcl(pVM, &pQueue->AllocLock, VERR_IGNORED);
1901	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
1902
1903	for (int cRetries = 1000;; cRetries--)
1904	{
1905	/*
1906	* Change to the DESTROY state.
1907	*/
1908	TMTIMERSTATE const enmState = pTimer->enmState;
1909	Log2(("TMTimerDestroy: %p:{.enmState=%s, .szName='%s'} cRetries=%d\n",
1910	pTimer, tmTimerState(enmState), pTimer->szName, cRetries));
1911	switch (enmState)
1912	{
1913	case TMTIMERSTATE_STOPPED:
1914	case TMTIMERSTATE_EXPIRED_DELIVER:
1915	break;
1916
1917	case TMTIMERSTATE_ACTIVE:
1918	fActive = true;
1919	break;
1920
1921	case TMTIMERSTATE_PENDING_STOP:
1922	case TMTIMERSTATE_PENDING_STOP_SCHEDULE:
1923	case TMTIMERSTATE_PENDING_RESCHEDULE:
1924	fActive = true;
1925	fPending = true;
1926	break;
1927
1928	case TMTIMERSTATE_PENDING_SCHEDULE:
1929	fPending = true;
1930	break;
1931
1932	/*
1933	* This shouldn't happen as the caller should make sure there are no races.
1934	*/
1935	case TMTIMERSTATE_EXPIRED_GET_UNLINK:
1936	case TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE:
1937	case TMTIMERSTATE_PENDING_RESCHEDULE_SET_EXPIRE:
1938	AssertMsgFailed(("%p:.enmState=%s %s\n", pTimer, tmTimerState(enmState), pTimer->szName));
1939	PDMCritSectLeave(pVM, &pQueue->TimerLock);
1940	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
1941
1942	AssertMsgReturn(cRetries > 0, ("Failed waiting for stable state. state=%d (%s)\n", pTimer->enmState, pTimer->szName),
1943	VERR_TM_UNSTABLE_STATE);
1944	if (!RTThreadYield())
1945	RTThreadSleep(1);
1946
1947	PDMCritSectRwEnterExcl(pVM, &pQueue->AllocLock, VERR_IGNORED);
1948	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
1949	continue;
1950
1951	/*
1952	* Invalid states.
1953	*/
1954	case TMTIMERSTATE_FREE:
1955	case TMTIMERSTATE_DESTROY:
1956	PDMCritSectLeave(pVM, &pQueue->TimerLock);
1957	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
1958	AssertLogRelMsgFailedReturn(("pTimer=%p %s\n", pTimer, tmTimerState(enmState)), VERR_TM_INVALID_STATE);
1959
1960	default:
1961	AssertMsgFailed(("Unknown timer state %d (%s)\n", enmState, pTimer->szName));
1962	PDMCritSectLeave(pVM, &pQueue->TimerLock);
1963	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
1964	return VERR_TM_UNKNOWN_STATE;
1965	}
1966
1967	/*
1968	* Try switch to the destroy state.
1969	* This should always succeed as the caller should make sure there are no race.
1970	*/
1971	bool fRc;
1972	TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_DESTROY, enmState, fRc);
1973	if (fRc)
1974	break;
1975	AssertMsgFailed(("%p:.enmState=%s %s\n", pTimer, tmTimerState(enmState), pTimer->szName));
1976	PDMCritSectLeave(pVM, &pQueue->TimerLock);
1977	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
1978
1979	AssertMsgReturn(cRetries > 0, ("Failed waiting for stable state. state=%d (%s)\n", pTimer->enmState, pTimer->szName),
1980	VERR_TM_UNSTABLE_STATE);
1981
1982	PDMCritSectRwEnterExcl(pVM, &pQueue->AllocLock, VERR_IGNORED);
1983	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
1984	}
1985
1986	/*
1987	* Unlink from the active list.
1988	*/
1989	if (fActive)
1990	{
1991	const PTMTIMER pPrev = tmTimerGetPrev(pQueue, pTimer);
1992	const PTMTIMER pNext = tmTimerGetNext(pQueue, pTimer);
1993	if (pPrev)
1994	tmTimerSetNext(pQueue, pPrev, pNext);
1995	else
1996	{
1997	tmTimerQueueSetHead(pQueue, pQueue, pNext);
1998	pQueue->u64Expire = pNext ? pNext->u64Expire : INT64_MAX;
1999	}
2000	if (pNext)
2001	tmTimerSetPrev(pQueue, pNext, pPrev);
2002	pTimer->idxNext = UINT32_MAX;
2003	pTimer->idxPrev = UINT32_MAX;
2004	}
2005
2006	/*
2007	* Unlink from the schedule list by running it.
2008	*/
2009	if (fPending)
2010	{
2011	Log3(("TMR3TimerDestroy: tmTimerQueueSchedule\n"));
2012	STAM_PROFILE_START(&pVM->tm.s.CTX_SUFF_Z(StatScheduleOne), a);
2013	Assert(pQueue->idxSchedule < pQueue->cTimersAlloc);
2014	tmTimerQueueSchedule(pVM, pQueue, pQueue);
2015	STAM_PROFILE_STOP(&pVM->tm.s.CTX_SUFF_Z(StatScheduleOne), a);
2016	}
2017
2018	#ifdef VBOX_WITH_STATISTICS
2019	/*
2020	* Deregister statistics.
2021	*/
2022	tmR3TimerDeregisterStats(pVM, pTimer);
2023	#endif
2024
2025	/*
2026	* Change it to free state and update the queue accordingly.
2027	*/
2028	Assert(pTimer->idxNext == UINT32_MAX); Assert(pTimer->idxPrev == UINT32_MAX); Assert(pTimer->idxScheduleNext == UINT32_MAX);
2029
2030	TM_SET_STATE(pTimer, TMTIMERSTATE_FREE);
2031
2032	pQueue->cTimersFree += 1;
2033	uint32_t idxTimer = (uint32_t)(pTimer - pQueue->paTimers);
2034	if (idxTimer < pQueue->idxFreeHint)
2035	pQueue->idxFreeHint = idxTimer;
2036
2037	#ifdef VBOX_STRICT
2038	tmTimerQueuesSanityChecks(pVM, "TMR3TimerDestroy");
2039	#endif
2040	PDMCritSectLeave(pVM, &pQueue->TimerLock);
2041	PDMCritSectRwLeaveExcl(pVM, &pQueue->AllocLock);
2042	return VINF_SUCCESS;
2043	}
2044
2045
2046	/**
2047	* Destroy a timer
2048	*
2049	* @returns VBox status code.
2050	* @param pVM The cross context VM structure.
2051	* @param hTimer Timer handle as returned by one of the create functions.
2052	*/
2053	VMMR3DECL(int) TMR3TimerDestroy(PVM pVM, TMTIMERHANDLE hTimer)
2054	{
2055	/* We ignore NILs here. */
2056	if (hTimer == NIL_TMTIMERHANDLE)
2057	return VINF_SUCCESS;
2058	TMTIMER_HANDLE_TO_VARS_RETURN(pVM, hTimer); /* => pTimer, pQueueCC, pQueue, idxTimer, idxQueue */
2059	return tmR3TimerDestroy(pVM, pQueue, pTimer);
2060	}
2061
2062
2063	/**
2064	* Destroy all timers owned by a device.
2065	*
2066	* @returns VBox status code.
2067	* @param pVM The cross context VM structure.
2068	* @param pDevIns Device which timers should be destroyed.
2069	*/
2070	VMM_INT_DECL(int) TMR3TimerDestroyDevice(PVM pVM, PPDMDEVINS pDevIns)
2071	{
2072	LogFlow(("TMR3TimerDestroyDevice: pDevIns=%p\n", pDevIns));
2073	if (!pDevIns)
2074	return VERR_INVALID_PARAMETER;
2075
2076	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
2077	{
2078	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[idxQueue];
2079	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2080	uint32_t idxTimer = pQueue->cTimersAlloc;
2081	while (idxTimer-- > 0)
2082	{
2083	PTMTIMER pTimer = &pQueue->paTimers[idxTimer];
2084	if ( pTimer->enmType == TMTIMERTYPE_DEV
2085	&& pTimer->u.Dev.pDevIns == pDevIns
2086	&& pTimer->enmState < TMTIMERSTATE_DESTROY)
2087	{
2088	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2089
2090	int rc = tmR3TimerDestroy(pVM, pQueue, pTimer);
2091	AssertRC(rc);
2092
2093	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2094	}
2095	}
2096	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2097	}
2098
2099	LogFlow(("TMR3TimerDestroyDevice: returns VINF_SUCCESS\n"));
2100	return VINF_SUCCESS;
2101	}
2102
2103
2104	/**
2105	* Destroy all timers owned by a USB device.
2106	*
2107	* @returns VBox status code.
2108	* @param pVM The cross context VM structure.
2109	* @param pUsbIns USB device which timers should be destroyed.
2110	*/
2111	VMM_INT_DECL(int) TMR3TimerDestroyUsb(PVM pVM, PPDMUSBINS pUsbIns)
2112	{
2113	LogFlow(("TMR3TimerDestroyUsb: pUsbIns=%p\n", pUsbIns));
2114	if (!pUsbIns)
2115	return VERR_INVALID_PARAMETER;
2116
2117	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
2118	{
2119	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[idxQueue];
2120	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2121	uint32_t idxTimer = pQueue->cTimersAlloc;
2122	while (idxTimer-- > 0)
2123	{
2124	PTMTIMER pTimer = &pQueue->paTimers[idxTimer];
2125	if ( pTimer->enmType == TMTIMERTYPE_USB
2126	&& pTimer->u.Usb.pUsbIns == pUsbIns
2127	&& pTimer->enmState < TMTIMERSTATE_DESTROY)
2128	{
2129	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2130
2131	int rc = tmR3TimerDestroy(pVM, pQueue, pTimer);
2132	AssertRC(rc);
2133
2134	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2135	}
2136	}
2137	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2138	}
2139
2140	LogFlow(("TMR3TimerDestroyUsb: returns VINF_SUCCESS\n"));
2141	return VINF_SUCCESS;
2142	}
2143
2144
2145	/**
2146	* Destroy all timers owned by a driver.
2147	*
2148	* @returns VBox status code.
2149	* @param pVM The cross context VM structure.
2150	* @param pDrvIns Driver which timers should be destroyed.
2151	*/
2152	VMM_INT_DECL(int) TMR3TimerDestroyDriver(PVM pVM, PPDMDRVINS pDrvIns)
2153	{
2154	LogFlow(("TMR3TimerDestroyDriver: pDrvIns=%p\n", pDrvIns));
2155	if (!pDrvIns)
2156	return VERR_INVALID_PARAMETER;
2157
2158	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
2159	{
2160	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[idxQueue];
2161	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2162	uint32_t idxTimer = pQueue->cTimersAlloc;
2163	while (idxTimer-- > 0)
2164	{
2165	PTMTIMER pTimer = &pQueue->paTimers[idxTimer];
2166	if ( pTimer->enmType == TMTIMERTYPE_DRV
2167	&& pTimer->u.Drv.pDrvIns == pDrvIns
2168	&& pTimer->enmState < TMTIMERSTATE_DESTROY)
2169	{
2170	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2171
2172	int rc = tmR3TimerDestroy(pVM, pQueue, pTimer);
2173	AssertRC(rc);
2174
2175	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
2176	}
2177	}
2178	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
2179	}
2180
2181	LogFlow(("TMR3TimerDestroyDriver: returns VINF_SUCCESS\n"));
2182	return VINF_SUCCESS;
2183	}
2184
2185
2186	/**
2187	* Internal function for getting the clock time.
2188	*
2189	* @returns clock time.
2190	* @param pVM The cross context VM structure.
2191	* @param enmClock The clock.
2192	*/
2193	DECLINLINE(uint64_t) tmClock(PVM pVM, TMCLOCK enmClock)
2194	{
2195	switch (enmClock)
2196	{
2197	case TMCLOCK_VIRTUAL: return TMVirtualGet(pVM);
2198	case TMCLOCK_VIRTUAL_SYNC: return TMVirtualSyncGet(pVM);
2199	case TMCLOCK_REAL: return TMRealGet(pVM);
2200	case TMCLOCK_TSC: return TMCpuTickGet(pVM->apCpusR3[0] /* just take VCPU 0 */);
2201	default:
2202	AssertMsgFailed(("enmClock=%d\n", enmClock));
2203	return ~(uint64_t)0;
2204	}
2205	}
2206
2207
2208	/**
2209	* Checks if the sync queue has one or more expired timers.
2210	*
2211	* @returns true / false.
2212	*
2213	* @param pVM The cross context VM structure.
2214	* @param enmClock The queue.
2215	*/
2216	DECLINLINE(bool) tmR3HasExpiredTimer(PVM pVM, TMCLOCK enmClock)
2217	{
2218	const uint64_t u64Expire = pVM->tm.s.aTimerQueues[enmClock].u64Expire;
2219	return u64Expire != INT64_MAX && u64Expire <= tmClock(pVM, enmClock);
2220	}
2221
2222
2223	/**
2224	* Checks for expired timers in all the queues.
2225	*
2226	* @returns true / false.
2227	* @param pVM The cross context VM structure.
2228	*/
2229	DECLINLINE(bool) tmR3AnyExpiredTimers(PVM pVM)
2230	{
2231	/*
2232	* Combine the time calculation for the first two since we're not on EMT
2233	* TMVirtualSyncGet only permits EMT.
2234	*/
2235	uint64_t u64Now = TMVirtualGetNoCheck(pVM);
2236	if (pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL].u64Expire <= u64Now)
2237	return true;
2238	u64Now = pVM->tm.s.fVirtualSyncTicking
2239	? u64Now - pVM->tm.s.offVirtualSync
2240	: pVM->tm.s.u64VirtualSync;
2241	if (pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC].u64Expire <= u64Now)
2242	return true;
2243
2244	/*
2245	* The remaining timers.
2246	*/
2247	if (tmR3HasExpiredTimer(pVM, TMCLOCK_REAL))
2248	return true;
2249	if (tmR3HasExpiredTimer(pVM, TMCLOCK_TSC))
2250	return true;
2251	return false;
2252	}
2253
2254
2255	/**
2256	* Schedule timer callback.
2257	*
2258	* @param pTimer Timer handle.
2259	* @param pvUser Pointer to the VM.
2260	* @thread Timer thread.
2261	*
2262	* @remark We cannot do the scheduling and queues running from a timer handler
2263	* since it's not executing in EMT, and even if it was it would be async
2264	* and we wouldn't know the state of the affairs.
2265	* So, we'll just raise the timer FF and force any REM execution to exit.
2266	*/
2267	static DECLCALLBACK(void) tmR3TimerCallback(PRTTIMER pTimer, void pvUser, uint64_t /iTick*/)
2268	{
2269	PVM pVM = (PVM)pvUser;
2270	PVMCPU pVCpuDst = pVM->apCpusR3[pVM->tm.s.idTimerCpu];
2271	NOREF(pTimer);
2272
2273	AssertCompile(TMCLOCK_MAX == 4);
2274	STAM_COUNTER_INC(&pVM->tm.s.StatTimerCallback);
2275
2276	#ifdef DEBUG_Sander /* very annoying, keep it private. */
2277	if (VMCPU_FF_IS_SET(pVCpuDst, VMCPU_FF_TIMER))
2278	Log(("tmR3TimerCallback: timer event still pending!!\n"));
2279	#endif
2280	if ( !VMCPU_FF_IS_SET(pVCpuDst, VMCPU_FF_TIMER)
2281	&& ( pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC].idxSchedule != UINT32_MAX /** @todo FIXME - reconsider offSchedule as a reason for running the timer queues. */
2282	\|\| pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL].idxSchedule != UINT32_MAX
2283	\|\| pVM->tm.s.aTimerQueues[TMCLOCK_REAL].idxSchedule != UINT32_MAX
2284	\|\| pVM->tm.s.aTimerQueues[TMCLOCK_TSC].idxSchedule != UINT32_MAX
2285	\|\| tmR3AnyExpiredTimers(pVM)
2286	)
2287	&& !VMCPU_FF_IS_SET(pVCpuDst, VMCPU_FF_TIMER)
2288	&& !pVM->tm.s.fRunningQueues
2289	)
2290	{
2291	Log5(("TM(%u): FF: 0 -> 1\n", __LINE__));
2292	VMCPU_FF_SET(pVCpuDst, VMCPU_FF_TIMER);
2293	VMR3NotifyCpuFFU(pVCpuDst->pUVCpu, VMNOTIFYFF_FLAGS_DONE_REM \| VMNOTIFYFF_FLAGS_POKE);
2294	STAM_COUNTER_INC(&pVM->tm.s.StatTimerCallbackSetFF);
2295	}
2296	}
2297
2298
2299	/**
2300	* Worker for tmR3TimerQueueDoOne that runs pending timers on the specified
2301	* non-empty timer queue.
2302	*
2303	* @param pVM The cross context VM structure.
2304	* @param pQueue The queue to run.
2305	* @param pTimer The head timer. Caller already check that this is
2306	* not NULL.
2307	*/
2308	static void tmR3TimerQueueRun(PVM pVM, PTMTIMERQUEUE pQueue, PTMTIMER pTimer)
2309	{
2310	VM_ASSERT_EMT(pVM); /** @todo relax this */
2311
2312	/*
2313	* Run timers.
2314	*
2315	* We check the clock once and run all timers which are ACTIVE
2316	* and have an expire time less or equal to the time we read.
2317	*
2318	* N.B. A generic unlink must be applied since other threads
2319	* are allowed to mess with any active timer at any time.
2320	*
2321	* However, we only allow EMT to handle EXPIRED_PENDING
2322	* timers, thus enabling the timer handler function to
2323	* arm the timer again.
2324	*/
2325	/** @todo the above 'however' is outdated. */
2326	const uint64_t u64Now = tmClock(pVM, pQueue->enmClock);
2327	while (pTimer->u64Expire <= u64Now)
2328	{
2329	PTMTIMER const pNext = tmTimerGetNext(pQueue, pTimer);
2330	PPDMCRITSECT pCritSect = pTimer->pCritSect;
2331	if (pCritSect)
2332	{
2333	STAM_PROFILE_START(&pTimer->StatCritSectEnter, Locking);
2334	PDMCritSectEnter(pVM, pCritSect, VERR_IGNORED);
2335	STAM_PROFILE_STOP(&pTimer->StatCritSectEnter, Locking);
2336	}
2337	Log2(("tmR3TimerQueueRun: %p:{.enmState=%s, .enmClock=%d, .enmType=%d, u64Expire=%llx (now=%llx) .szName='%s'}\n",
2338	pTimer, tmTimerState(pTimer->enmState), pQueue->enmClock, pTimer->enmType, pTimer->u64Expire, u64Now, pTimer->szName));
2339	bool fRc;
2340	TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_EXPIRED_GET_UNLINK, TMTIMERSTATE_ACTIVE, fRc);
2341	if (fRc)
2342	{
2343	Assert(pTimer->idxScheduleNext == UINT32_MAX); /* this can trigger falsely */
2344
2345	/* unlink */
2346	const PTMTIMER pPrev = tmTimerGetPrev(pQueue, pTimer);
2347	if (pPrev)
2348	tmTimerSetNext(pQueue, pPrev, pNext);
2349	else
2350	{
2351	tmTimerQueueSetHead(pQueue, pQueue, pNext);
2352	pQueue->u64Expire = pNext ? pNext->u64Expire : INT64_MAX;
2353	}
2354	if (pNext)
2355	tmTimerSetPrev(pQueue, pNext, pPrev);
2356	pTimer->idxNext = UINT32_MAX;
2357	pTimer->idxPrev = UINT32_MAX;
2358
2359	/* fire */
2360	TM_SET_STATE(pTimer, TMTIMERSTATE_EXPIRED_DELIVER);
2361	STAM_PROFILE_START(&pTimer->StatTimer, PrfTimer);
2362	switch (pTimer->enmType)
2363	{
2364	case TMTIMERTYPE_DEV: pTimer->u.Dev.pfnTimer(pTimer->u.Dev.pDevIns, pTimer->hSelf, pTimer->pvUser); break;
2365	case TMTIMERTYPE_USB: pTimer->u.Usb.pfnTimer(pTimer->u.Usb.pUsbIns, pTimer->hSelf, pTimer->pvUser); break;
2366	case TMTIMERTYPE_DRV: pTimer->u.Drv.pfnTimer(pTimer->u.Drv.pDrvIns, pTimer->hSelf, pTimer->pvUser); break;
2367	case TMTIMERTYPE_INTERNAL: pTimer->u.Internal.pfnTimer(pVM, pTimer->hSelf, pTimer->pvUser); break;
2368	default:
2369	AssertMsgFailed(("Invalid timer type %d (%s)\n", pTimer->enmType, pTimer->szName));
2370	break;
2371	}
2372	STAM_PROFILE_STOP(&pTimer->StatTimer, PrfTimer);
2373
2374	/* change the state if it wasn't changed already in the handler. */
2375	TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_STOPPED, TMTIMERSTATE_EXPIRED_DELIVER, fRc);
2376	Log2(("tmR3TimerQueueRun: new state %s\n", tmTimerState(pTimer->enmState)));
2377	}
2378	if (pCritSect)
2379	PDMCritSectLeave(pVM, pCritSect);
2380
2381	/* Advance? */
2382	pTimer = pNext;
2383	if (!pTimer)
2384	break;
2385	} /* run loop */
2386	}
2387
2388
2389	/**
2390	* Service one regular timer queue.
2391	*
2392	* @param pVM The cross context VM structure.
2393	* @param pQueue The queue.
2394	*/
2395	static void tmR3TimerQueueDoOne(PVM pVM, PTMTIMERQUEUE pQueue)
2396	{
2397	Assert(pQueue->enmClock != TMCLOCK_VIRTUAL_SYNC);
2398
2399	/*
2400	* Only one thread should be "doing" the queue.
2401	*/
2402	if (ASMAtomicCmpXchgBool(&pQueue->fBeingProcessed, true, false))
2403	{
2404	STAM_PROFILE_START(&pQueue->StatDo, s);
2405	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
2406
2407	if (pQueue->idxSchedule != UINT32_MAX)
2408	tmTimerQueueSchedule(pVM, pQueue, pQueue);
2409
2410	PTMTIMER pHead = tmTimerQueueGetHead(pQueue, pQueue);
2411	if (pHead)
2412	tmR3TimerQueueRun(pVM, pQueue, pHead);
2413
2414	PDMCritSectLeave(pVM, &pQueue->TimerLock);
2415	STAM_PROFILE_STOP(&pQueue->StatDo, s);
2416	ASMAtomicWriteBool(&pQueue->fBeingProcessed, false);
2417	}
2418	}
2419
2420
2421	/**
2422	* Schedules and runs any pending times in the timer queue for the
2423	* synchronous virtual clock.
2424	*
2425	* This scheduling is a bit different from the other queues as it need
2426	* to implement the special requirements of the timer synchronous virtual
2427	* clock, thus this 2nd queue run function.
2428	*
2429	* @param pVM The cross context VM structure.
2430	*
2431	* @remarks The caller must the Virtual Sync lock. Owning the TM lock is no
2432	* longer important.
2433	*/
2434	static void tmR3TimerQueueRunVirtualSync(PVM pVM)
2435	{
2436	PTMTIMERQUEUE const pQueue = &pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC];
2437	VM_ASSERT_EMT(pVM);
2438	Assert(PDMCritSectIsOwner(pVM, &pVM->tm.s.VirtualSyncLock));
2439
2440	/*
2441	* Any timers?
2442	*/
2443	PTMTIMER pNext = tmTimerQueueGetHead(pQueue, pQueue);
2444	if (RT_UNLIKELY(!pNext))
2445	{
2446	Assert(pVM->tm.s.fVirtualSyncTicking \|\| !pVM->tm.s.cVirtualTicking);
2447	return;
2448	}
2449	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncRun);
2450
2451	/*
2452	* Calculate the time frame for which we will dispatch timers.
2453	*
2454	* We use a time frame ranging from the current sync time (which is most likely the
2455	* same as the head timer) and some configurable period (100000ns) up towards the
2456	* current virtual time. This period might also need to be restricted by the catch-up
2457	* rate so frequent calls to this function won't accelerate the time too much, however
2458	* this will be implemented at a later point if necessary.
2459	*
2460	* Without this frame we would 1) having to run timers much more frequently
2461	* and 2) lag behind at a steady rate.
2462	*/
2463	const uint64_t u64VirtualNow = TMVirtualGetNoCheck(pVM);
2464	uint64_t const offSyncGivenUp = pVM->tm.s.offVirtualSyncGivenUp;
2465	uint64_t u64Now;
2466	if (!pVM->tm.s.fVirtualSyncTicking)
2467	{
2468	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncRunStoppedAlready);
2469	u64Now = pVM->tm.s.u64VirtualSync;
2470	Assert(u64Now <= pNext->u64Expire);
2471	}
2472	else
2473	{
2474	/* Calc 'now'. */
2475	bool fStopCatchup = false;
2476	bool fUpdateStuff = false;
2477	uint64_t off = pVM->tm.s.offVirtualSync;
2478	if (pVM->tm.s.fVirtualSyncCatchUp)
2479	{
2480	uint64_t u64Delta = u64VirtualNow - pVM->tm.s.u64VirtualSyncCatchUpPrev;
2481	if (RT_LIKELY(!(u64Delta >> 32)))
2482	{
2483	uint64_t u64Sub = ASMMultU64ByU32DivByU32(u64Delta, pVM->tm.s.u32VirtualSyncCatchUpPercentage, 100);
2484	if (off > u64Sub + offSyncGivenUp)
2485	{
2486	off -= u64Sub;
2487	Log4(("TM: %'RU64/-%'8RU64: sub %'RU64 [tmR3TimerQueueRunVirtualSync]\n", u64VirtualNow - off, off - offSyncGivenUp, u64Sub));
2488	}
2489	else
2490	{
2491	STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatVirtualSyncCatchup, c);
2492	fStopCatchup = true;
2493	off = offSyncGivenUp;
2494	}
2495	fUpdateStuff = true;
2496	}
2497	}
2498	u64Now = u64VirtualNow - off;
2499
2500	/* Adjust against last returned time. */
2501	uint64_t u64Last = ASMAtomicUoReadU64(&pVM->tm.s.u64VirtualSync);
2502	if (u64Last > u64Now)
2503	{
2504	u64Now = u64Last + 1;
2505	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncGetAdjLast);
2506	}
2507
2508	/* Check if stopped by expired timer. */
2509	uint64_t const u64Expire = pNext->u64Expire;
2510	if (u64Now >= u64Expire)
2511	{
2512	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncRunStop);
2513	u64Now = u64Expire;
2514	ASMAtomicWriteU64(&pVM->tm.s.u64VirtualSync, u64Now);
2515	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncTicking, false);
2516	Log4(("TM: %'RU64/-%'8RU64: exp tmr [tmR3TimerQueueRunVirtualSync]\n", u64Now, u64VirtualNow - u64Now - offSyncGivenUp));
2517	}
2518	else
2519	{
2520	ASMAtomicWriteU64(&pVM->tm.s.u64VirtualSync, u64Now);
2521	if (fUpdateStuff)
2522	{
2523	ASMAtomicWriteU64(&pVM->tm.s.offVirtualSync, off);
2524	ASMAtomicWriteU64(&pVM->tm.s.u64VirtualSyncCatchUpPrev, u64VirtualNow);
2525	ASMAtomicWriteU64(&pVM->tm.s.u64VirtualSync, u64Now);
2526	if (fStopCatchup)
2527	{
2528	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncCatchUp, false);
2529	Log4(("TM: %'RU64/0: caught up [tmR3TimerQueueRunVirtualSync]\n", u64VirtualNow));
2530	}
2531	}
2532	}
2533	}
2534
2535	/* calc end of frame. */
2536	uint64_t u64Max = u64Now + pVM->tm.s.u32VirtualSyncScheduleSlack;
2537	if (u64Max > u64VirtualNow - offSyncGivenUp)
2538	u64Max = u64VirtualNow - offSyncGivenUp;
2539
2540	/* assert sanity */
2541	Assert(u64Now <= u64VirtualNow - offSyncGivenUp);
2542	Assert(u64Max <= u64VirtualNow - offSyncGivenUp);
2543	Assert(u64Now <= u64Max);
2544	Assert(offSyncGivenUp == pVM->tm.s.offVirtualSyncGivenUp);
2545
2546	/*
2547	* Process the expired timers moving the clock along as we progress.
2548	*/
2549	#ifdef VBOX_STRICT
2550	uint64_t u64Prev = u64Now; NOREF(u64Prev);
2551	#endif
2552	while (pNext && pNext->u64Expire <= u64Max)
2553	{
2554	/* Advance */
2555	PTMTIMER pTimer = pNext;
2556	pNext = tmTimerGetNext(pQueue, pTimer);
2557
2558	/* Take the associated lock. */
2559	PPDMCRITSECT pCritSect = pTimer->pCritSect;
2560	if (pCritSect)
2561	{
2562	STAM_PROFILE_START(&pTimer->StatCritSectEnter, Locking);
2563	PDMCritSectEnter(pVM, pCritSect, VERR_IGNORED);
2564	STAM_PROFILE_STOP(&pTimer->StatCritSectEnter, Locking);
2565	}
2566
2567	Log2(("tmR3TimerQueueRunVirtualSync: %p:{.enmState=%s, .enmClock=%d, .enmType=%d, u64Expire=%llx (now=%llx) .szName='%s'}\n",
2568	pTimer, tmTimerState(pTimer->enmState), pQueue->enmClock, pTimer->enmType, pTimer->u64Expire, u64Now, pTimer->szName));
2569
2570	/* Advance the clock - don't permit timers to be out of order or armed
2571	in the 'past'. */
2572	#ifdef VBOX_STRICT
2573	AssertMsg(pTimer->u64Expire >= u64Prev, ("%'RU64 < %'RU64 %s\n", pTimer->u64Expire, u64Prev, pTimer->szName));
2574	u64Prev = pTimer->u64Expire;
2575	#endif
2576	ASMAtomicWriteU64(&pVM->tm.s.u64VirtualSync, pTimer->u64Expire);
2577	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncTicking, false);
2578
2579	/* Unlink it, change the state and do the callout. */
2580	tmTimerQueueUnlinkActive(pVM, pQueue, pQueue, pTimer);
2581	TM_SET_STATE(pTimer, TMTIMERSTATE_EXPIRED_DELIVER);
2582	STAM_PROFILE_START(&pTimer->StatTimer, PrfTimer);
2583	switch (pTimer->enmType)
2584	{
2585	case TMTIMERTYPE_DEV: pTimer->u.Dev.pfnTimer(pTimer->u.Dev.pDevIns, pTimer->hSelf, pTimer->pvUser); break;
2586	case TMTIMERTYPE_USB: pTimer->u.Usb.pfnTimer(pTimer->u.Usb.pUsbIns, pTimer->hSelf, pTimer->pvUser); break;
2587	case TMTIMERTYPE_DRV: pTimer->u.Drv.pfnTimer(pTimer->u.Drv.pDrvIns, pTimer->hSelf, pTimer->pvUser); break;
2588	case TMTIMERTYPE_INTERNAL: pTimer->u.Internal.pfnTimer(pVM, pTimer->hSelf, pTimer->pvUser); break;
2589	default:
2590	AssertMsgFailed(("Invalid timer type %d (%s)\n", pTimer->enmType, pTimer->szName));
2591	break;
2592	}
2593	STAM_PROFILE_STOP(&pTimer->StatTimer, PrfTimer);
2594
2595	/* Change the state if it wasn't changed already in the handler.
2596	Reset the Hz hint too since this is the same as TMTimerStop. */
2597	bool fRc;
2598	TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_STOPPED, TMTIMERSTATE_EXPIRED_DELIVER, fRc);
2599	if (fRc && pTimer->uHzHint)
2600	{
2601	if (pTimer->uHzHint >= pQueue->uMaxHzHint)
2602	ASMAtomicOrU64(&pVM->tm.s.HzHint.u64Combined, RT_BIT_32(TMCLOCK_VIRTUAL_SYNC) \| RT_BIT_32(TMCLOCK_VIRTUAL_SYNC + 16));
2603	pTimer->uHzHint = 0;
2604	}
2605	Log2(("tmR3TimerQueueRunVirtualSync: new state %s\n", tmTimerState(pTimer->enmState)));
2606
2607	/* Leave the associated lock. */
2608	if (pCritSect)
2609	PDMCritSectLeave(pVM, pCritSect);
2610	} /* run loop */
2611
2612
2613	/*
2614	* Restart the clock if it was stopped to serve any timers,
2615	* and start/adjust catch-up if necessary.
2616	*/
2617	if ( !pVM->tm.s.fVirtualSyncTicking
2618	&& pVM->tm.s.cVirtualTicking)
2619	{
2620	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncRunRestart);
2621
2622	/* calc the slack we've handed out. */
2623	const uint64_t u64VirtualNow2 = TMVirtualGetNoCheck(pVM);
2624	Assert(u64VirtualNow2 >= u64VirtualNow);
2625	AssertMsg(pVM->tm.s.u64VirtualSync >= u64Now, ("%'RU64 < %'RU64\n", pVM->tm.s.u64VirtualSync, u64Now));
2626	const uint64_t offSlack = pVM->tm.s.u64VirtualSync - u64Now;
2627	STAM_STATS({
2628	if (offSlack)
2629	{
2630	PSTAMPROFILE p = &pVM->tm.s.StatVirtualSyncRunSlack;
2631	p->cPeriods++;
2632	p->cTicks += offSlack;
2633	if (p->cTicksMax < offSlack) p->cTicksMax = offSlack;
2634	if (p->cTicksMin > offSlack) p->cTicksMin = offSlack;
2635	}
2636	});
2637
2638	/* Let the time run a little bit while we were busy running timers(?). */
2639	uint64_t u64Elapsed;
2640	#define MAX_ELAPSED 30000U /* ns */
2641	if (offSlack > MAX_ELAPSED)
2642	u64Elapsed = 0;
2643	else
2644	{
2645	u64Elapsed = u64VirtualNow2 - u64VirtualNow;
2646	if (u64Elapsed > MAX_ELAPSED)
2647	u64Elapsed = MAX_ELAPSED;
2648	u64Elapsed = u64Elapsed > offSlack ? u64Elapsed - offSlack : 0;
2649	}
2650	#undef MAX_ELAPSED
2651
2652	/* Calc the current offset. */
2653	uint64_t offNew = u64VirtualNow2 - pVM->tm.s.u64VirtualSync - u64Elapsed;
2654	Assert(!(offNew & RT_BIT_64(63)));
2655	uint64_t offLag = offNew - pVM->tm.s.offVirtualSyncGivenUp;
2656	Assert(!(offLag & RT_BIT_64(63)));
2657
2658	/*
2659	* Deal with starting, adjusting and stopping catchup.
2660	*/
2661	if (pVM->tm.s.fVirtualSyncCatchUp)
2662	{
2663	if (offLag <= pVM->tm.s.u64VirtualSyncCatchUpStopThreshold)
2664	{
2665	/* stop */
2666	STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatVirtualSyncCatchup, c);
2667	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncCatchUp, false);
2668	Log4(("TM: %'RU64/-%'8RU64: caught up [pt]\n", u64VirtualNow2 - offNew, offLag));
2669	}
2670	else if (offLag <= pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold)
2671	{
2672	/* adjust */
2673	unsigned i = 0;
2674	while ( i + 1 < RT_ELEMENTS(pVM->tm.s.aVirtualSyncCatchUpPeriods)
2675	&& offLag >= pVM->tm.s.aVirtualSyncCatchUpPeriods[i + 1].u64Start)
2676	i++;
2677	if (pVM->tm.s.u32VirtualSyncCatchUpPercentage < pVM->tm.s.aVirtualSyncCatchUpPeriods[i].u32Percentage)
2678	{
2679	STAM_COUNTER_INC(&pVM->tm.s.aStatVirtualSyncCatchupAdjust[i]);
2680	ASMAtomicWriteU32(&pVM->tm.s.u32VirtualSyncCatchUpPercentage, pVM->tm.s.aVirtualSyncCatchUpPeriods[i].u32Percentage);
2681	Log4(("TM: %'RU64/%'8RU64: adj %u%%\n", u64VirtualNow2 - offNew, offLag, pVM->tm.s.u32VirtualSyncCatchUpPercentage));
2682	}
2683	pVM->tm.s.u64VirtualSyncCatchUpPrev = u64VirtualNow2;
2684	}
2685	else
2686	{
2687	/* give up */
2688	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncGiveUp);
2689	STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatVirtualSyncCatchup, c);
2690	ASMAtomicWriteU64((uint64_t volatile *)&pVM->tm.s.offVirtualSyncGivenUp, offNew);
2691	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncCatchUp, false);
2692	Log4(("TM: %'RU64/%'8RU64: give up %u%%\n", u64VirtualNow2 - offNew, offLag, pVM->tm.s.u32VirtualSyncCatchUpPercentage));
2693	LogRel(("TM: Giving up catch-up attempt at a %'RU64 ns lag; new total: %'RU64 ns\n", offLag, offNew));
2694	}
2695	}
2696	else if (offLag >= pVM->tm.s.aVirtualSyncCatchUpPeriods[0].u64Start)
2697	{
2698	if (offLag <= pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold)
2699	{
2700	/* start */
2701	STAM_PROFILE_ADV_START(&pVM->tm.s.StatVirtualSyncCatchup, c);
2702	unsigned i = 0;
2703	while ( i + 1 < RT_ELEMENTS(pVM->tm.s.aVirtualSyncCatchUpPeriods)
2704	&& offLag >= pVM->tm.s.aVirtualSyncCatchUpPeriods[i + 1].u64Start)
2705	i++;
2706	STAM_COUNTER_INC(&pVM->tm.s.aStatVirtualSyncCatchupInitial[i]);
2707	ASMAtomicWriteU32(&pVM->tm.s.u32VirtualSyncCatchUpPercentage, pVM->tm.s.aVirtualSyncCatchUpPeriods[i].u32Percentage);
2708	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncCatchUp, true);
2709	Log4(("TM: %'RU64/%'8RU64: catch-up %u%%\n", u64VirtualNow2 - offNew, offLag, pVM->tm.s.u32VirtualSyncCatchUpPercentage));
2710	}
2711	else
2712	{
2713	/* don't bother */
2714	STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncGiveUpBeforeStarting);
2715	ASMAtomicWriteU64((uint64_t volatile *)&pVM->tm.s.offVirtualSyncGivenUp, offNew);
2716	Log4(("TM: %'RU64/%'8RU64: give up\n", u64VirtualNow2 - offNew, offLag));
2717	LogRel(("TM: Not bothering to attempt catching up a %'RU64 ns lag; new total: %'RU64\n", offLag, offNew));
2718	}
2719	}
2720
2721	/*
2722	* Update the offset and restart the clock.
2723	*/
2724	Assert(!(offNew & RT_BIT_64(63)));
2725	ASMAtomicWriteU64(&pVM->tm.s.offVirtualSync, offNew);
2726	ASMAtomicWriteBool(&pVM->tm.s.fVirtualSyncTicking, true);
2727	}
2728	}
2729
2730
2731	/**
2732	* Deals with stopped Virtual Sync clock.
2733	*
2734	* This is called by the forced action flag handling code in EM when it
2735	* encounters the VM_FF_TM_VIRTUAL_SYNC flag. It is called by all VCPUs and they
2736	* will block on the VirtualSyncLock until the pending timers has been executed
2737	* and the clock restarted.
2738	*
2739	* @param pVM The cross context VM structure.
2740	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
2741	*
2742	* @thread EMTs
2743	*/
2744	VMMR3_INT_DECL(void) TMR3VirtualSyncFF(PVM pVM, PVMCPU pVCpu)
2745	{
2746	Log2(("TMR3VirtualSyncFF:\n"));
2747
2748	/*
2749	* The EMT doing the timers is diverted to them.
2750	*/
2751	if (pVCpu->idCpu == pVM->tm.s.idTimerCpu)
2752	TMR3TimerQueuesDo(pVM);
2753	/*
2754	* The other EMTs will block on the virtual sync lock and the first owner
2755	* will run the queue and thus restarting the clock.
2756	*
2757	* Note! This is very suboptimal code wrt to resuming execution when there
2758	* are more than two Virtual CPUs, since they will all have to enter
2759	* the critical section one by one. But it's a very simple solution
2760	* which will have to do the job for now.
2761	*/
2762	else
2763	{
2764	/** @todo Optimize for SMP */
2765	STAM_PROFILE_START(&pVM->tm.s.StatVirtualSyncFF, a);
2766	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED);
2767	if (pVM->tm.s.fVirtualSyncTicking)
2768	{
2769	STAM_PROFILE_STOP(&pVM->tm.s.StatVirtualSyncFF, a); /* before the unlock! */
2770	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
2771	Log2(("TMR3VirtualSyncFF: ticking\n"));
2772	}
2773	else
2774	{
2775	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
2776
2777	/* try run it. */
2778	PDMCritSectEnter(pVM, &pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL].TimerLock, VERR_IGNORED);
2779	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED);
2780	if (pVM->tm.s.fVirtualSyncTicking)
2781	Log2(("TMR3VirtualSyncFF: ticking (2)\n"));
2782	else
2783	{
2784	ASMAtomicWriteBool(&pVM->tm.s.fRunningVirtualSyncQueue, true);
2785	Log2(("TMR3VirtualSyncFF: running queue\n"));
2786
2787	Assert(pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC].idxSchedule == UINT32_MAX);
2788	tmR3TimerQueueRunVirtualSync(pVM);
2789	if (pVM->tm.s.fVirtualSyncTicking) /** @todo move into tmR3TimerQueueRunVirtualSync - FIXME */
2790	VM_FF_CLEAR(pVM, VM_FF_TM_VIRTUAL_SYNC);
2791
2792	ASMAtomicWriteBool(&pVM->tm.s.fRunningVirtualSyncQueue, false);
2793	}
2794	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
2795	STAM_PROFILE_STOP(&pVM->tm.s.StatVirtualSyncFF, a); /* before the unlock! */
2796	PDMCritSectLeave(pVM, &pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL].TimerLock);
2797	}
2798	}
2799	}
2800
2801
2802	/**
2803	* Service the special virtual sync timer queue.
2804	*
2805	* @param pVM The cross context VM structure.
2806	* @param pVCpuDst The destination VCpu.
2807	*/
2808	static void tmR3TimerQueueDoVirtualSync(PVM pVM, PVMCPU pVCpuDst)
2809	{
2810	PTMTIMERQUEUE pQueue = &pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL_SYNC];
2811	if (ASMAtomicCmpXchgBool(&pQueue->fBeingProcessed, true, false))
2812	{
2813	STAM_PROFILE_START(&pQueue->StatDo, s1);
2814	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
2815	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED);
2816	ASMAtomicWriteBool(&pVM->tm.s.fRunningVirtualSyncQueue, true);
2817	VMCPU_FF_CLEAR(pVCpuDst, VMCPU_FF_TIMER); /* Clear the FF once we started working for real. */
2818
2819	Assert(pQueue->idxSchedule == UINT32_MAX);
2820	tmR3TimerQueueRunVirtualSync(pVM);
2821	if (pVM->tm.s.fVirtualSyncTicking) /** @todo move into tmR3TimerQueueRunVirtualSync - FIXME */
2822	VM_FF_CLEAR(pVM, VM_FF_TM_VIRTUAL_SYNC);
2823
2824	ASMAtomicWriteBool(&pVM->tm.s.fRunningVirtualSyncQueue, false);
2825	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
2826	PDMCritSectLeave(pVM, &pQueue->TimerLock);
2827	STAM_PROFILE_STOP(&pQueue->StatDo, s1);
2828	ASMAtomicWriteBool(&pQueue->fBeingProcessed, false);
2829	}
2830	}
2831
2832
2833	/**
2834	* Schedules and runs any pending timers.
2835	*
2836	* This is normally called from a forced action handler in EMT.
2837	*
2838	* @param pVM The cross context VM structure.
2839	*
2840	* @thread EMT (actually EMT0, but we fend off the others)
2841	*/
2842	VMMR3DECL(void) TMR3TimerQueuesDo(PVM pVM)
2843	{
2844	/*
2845	* Only the dedicated timer EMT should do stuff here.
2846	* (fRunningQueues is only used as an indicator.)
2847	*/
2848	Assert(pVM->tm.s.idTimerCpu < pVM->cCpus);
2849	PVMCPU pVCpuDst = pVM->apCpusR3[pVM->tm.s.idTimerCpu];
2850	if (VMMGetCpu(pVM) != pVCpuDst)
2851	{
2852	Assert(pVM->cCpus > 1);
2853	return;
2854	}
2855	STAM_PROFILE_START(&pVM->tm.s.StatDoQueues, a);
2856	Log2(("TMR3TimerQueuesDo:\n"));
2857	Assert(!pVM->tm.s.fRunningQueues);
2858	ASMAtomicWriteBool(&pVM->tm.s.fRunningQueues, true);
2859
2860	/*
2861	* Process the queues.
2862	*/
2863	AssertCompile(TMCLOCK_MAX == 4);
2864
2865	/*
2866	* TMCLOCK_VIRTUAL_SYNC (see also TMR3VirtualSyncFF)
2867	*/
2868	tmR3TimerQueueDoVirtualSync(pVM, pVCpuDst);
2869
2870	/*
2871	* TMCLOCK_VIRTUAL
2872	*/
2873	tmR3TimerQueueDoOne(pVM, &pVM->tm.s.aTimerQueues[TMCLOCK_VIRTUAL]);
2874
2875	/*
2876	* TMCLOCK_TSC
2877	*/
2878	Assert(pVM->tm.s.aTimerQueues[TMCLOCK_TSC].idxActive == UINT32_MAX); /* not used */
2879
2880	/*
2881	* TMCLOCK_REAL
2882	*/
2883	tmR3TimerQueueDoOne(pVM, &pVM->tm.s.aTimerQueues[TMCLOCK_REAL]);
2884
2885	#ifdef VBOX_STRICT
2886	/* check that we didn't screw up. */
2887	tmTimerQueuesSanityChecks(pVM, "TMR3TimerQueuesDo");
2888	#endif
2889
2890	/* done */
2891	Log2(("TMR3TimerQueuesDo: returns void\n"));
2892	ASMAtomicWriteBool(&pVM->tm.s.fRunningQueues, false);
2893	STAM_PROFILE_STOP(&pVM->tm.s.StatDoQueues, a);
2894	}
2895
2896
2897
2898	/** @name Saved state values
2899	* @{ */
2900	#define TMTIMERSTATE_SAVED_PENDING_STOP 4
2901	#define TMTIMERSTATE_SAVED_PENDING_SCHEDULE 7
2902	/** @} */
2903
2904
2905	/**
2906	* Saves the state of a timer to a saved state.
2907	*
2908	* @returns VBox status code.
2909	* @param pVM The cross context VM structure.
2910	* @param hTimer Timer to save.
2911	* @param pSSM Save State Manager handle.
2912	*/
2913	VMMR3DECL(int) TMR3TimerSave(PVM pVM, TMTIMERHANDLE hTimer, PSSMHANDLE pSSM)
2914	{
2915	VM_ASSERT_EMT(pVM);
2916	TMTIMER_HANDLE_TO_VARS_RETURN(pVM, hTimer); /* => pTimer, pQueueCC, pQueue, idxTimer, idxQueue */
2917	LogFlow(("TMR3TimerSave: %p:{enmState=%s, .szName='%s'} pSSM=%p\n", pTimer, tmTimerState(pTimer->enmState), pTimer->szName, pSSM));
2918
2919	switch (pTimer->enmState)
2920	{
2921	case TMTIMERSTATE_STOPPED:
2922	case TMTIMERSTATE_PENDING_STOP:
2923	case TMTIMERSTATE_PENDING_STOP_SCHEDULE:
2924	return SSMR3PutU8(pSSM, TMTIMERSTATE_SAVED_PENDING_STOP);
2925
2926	case TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE:
2927	case TMTIMERSTATE_PENDING_RESCHEDULE_SET_EXPIRE:
2928	AssertMsgFailed(("u64Expire is being updated! (%s)\n", pTimer->szName));
2929	if (!RTThreadYield())
2930	RTThreadSleep(1);
2931	RT_FALL_THRU();
2932	case TMTIMERSTATE_ACTIVE:
2933	case TMTIMERSTATE_PENDING_SCHEDULE:
2934	case TMTIMERSTATE_PENDING_RESCHEDULE:
2935	SSMR3PutU8(pSSM, TMTIMERSTATE_SAVED_PENDING_SCHEDULE);
2936	return SSMR3PutU64(pSSM, pTimer->u64Expire);
2937
2938	case TMTIMERSTATE_EXPIRED_GET_UNLINK:
2939	case TMTIMERSTATE_EXPIRED_DELIVER:
2940	case TMTIMERSTATE_DESTROY:
2941	case TMTIMERSTATE_FREE:
2942	case TMTIMERSTATE_INVALID:
2943	AssertMsgFailed(("Invalid timer state %d %s (%s)\n", pTimer->enmState, tmTimerState(pTimer->enmState), pTimer->szName));
2944	return SSMR3HandleSetStatus(pSSM, VERR_TM_INVALID_STATE);
2945	}
2946
2947	AssertMsgFailed(("Unknown timer state %d (%s)\n", pTimer->enmState, pTimer->szName));
2948	return SSMR3HandleSetStatus(pSSM, VERR_TM_UNKNOWN_STATE);
2949	}
2950
2951
2952	/**
2953	* Loads the state of a timer from a saved state.
2954	*
2955	* @returns VBox status code.
2956	* @param pVM The cross context VM structure.
2957	* @param hTimer Handle of Timer to restore.
2958	* @param pSSM Save State Manager handle.
2959	*/
2960	VMMR3DECL(int) TMR3TimerLoad(PVM pVM, TMTIMERHANDLE hTimer, PSSMHANDLE pSSM)
2961	{
2962	VM_ASSERT_EMT(pVM);
2963	TMTIMER_HANDLE_TO_VARS_RETURN(pVM, hTimer); /* => pTimer, pQueueCC, pQueue, idxTimer, idxQueue */
2964	Assert(pSSM);
2965	LogFlow(("TMR3TimerLoad: %p:{enmState=%s, .szName='%s'} pSSM=%p\n", pTimer, tmTimerState(pTimer->enmState), pTimer->szName, pSSM));
2966
2967	/*
2968	* Load the state and validate it.
2969	*/
2970	uint8_t u8State;
2971	int rc = SSMR3GetU8(pSSM, &u8State);
2972	if (RT_FAILURE(rc))
2973	return rc;
2974
2975	/* TMTIMERSTATE_SAVED_XXX: Workaround for accidental state shift in r47786 (2009-05-26 19:12:12). */
2976	if ( u8State == TMTIMERSTATE_SAVED_PENDING_STOP + 1
2977	\|\| u8State == TMTIMERSTATE_SAVED_PENDING_SCHEDULE + 1)
2978	u8State--;
2979
2980	if ( u8State != TMTIMERSTATE_SAVED_PENDING_STOP
2981	&& u8State != TMTIMERSTATE_SAVED_PENDING_SCHEDULE)
2982	{
2983	AssertLogRelMsgFailed(("u8State=%d\n", u8State));
2984	return SSMR3HandleSetStatus(pSSM, VERR_TM_LOAD_STATE);
2985	}
2986
2987	/* Enter the critical sections to make TMTimerSet/Stop happy. */
2988	if (pQueue->enmClock == TMCLOCK_VIRTUAL_SYNC)
2989	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED);
2990	PPDMCRITSECT pCritSect = pTimer->pCritSect;
2991	if (pCritSect)
2992	PDMCritSectEnter(pVM, pCritSect, VERR_IGNORED);
2993
2994	if (u8State == TMTIMERSTATE_SAVED_PENDING_SCHEDULE)
2995	{
2996	/*
2997	* Load the expire time.
2998	*/
2999	uint64_t u64Expire;
3000	rc = SSMR3GetU64(pSSM, &u64Expire);
3001	if (RT_FAILURE(rc))
3002	return rc;
3003
3004	/*
3005	* Set it.
3006	*/
3007	Log(("u8State=%d u64Expire=%llu\n", u8State, u64Expire));
3008	rc = TMTimerSet(pVM, hTimer, u64Expire);
3009	}
3010	else
3011	{
3012	/*
3013	* Stop it.
3014	*/
3015	Log(("u8State=%d\n", u8State));
3016	rc = TMTimerStop(pVM, hTimer);
3017	}
3018
3019	if (pCritSect)
3020	PDMCritSectLeave(pVM, pCritSect);
3021	if (pQueue->enmClock == TMCLOCK_VIRTUAL_SYNC)
3022	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
3023
3024	/*
3025	* On failure set SSM status.
3026	*/
3027	if (RT_FAILURE(rc))
3028	rc = SSMR3HandleSetStatus(pSSM, rc);
3029	return rc;
3030	}
3031
3032
3033	/**
3034	* Skips the state of a timer in a given saved state.
3035	*
3036	* @returns VBox status.
3037	* @param pSSM Save State Manager handle.
3038	* @param pfActive Where to store whether the timer was active
3039	* when the state was saved.
3040	*/
3041	VMMR3DECL(int) TMR3TimerSkip(PSSMHANDLE pSSM, bool *pfActive)
3042	{
3043	Assert(pSSM); AssertPtr(pfActive);
3044	LogFlow(("TMR3TimerSkip: pSSM=%p pfActive=%p\n", pSSM, pfActive));
3045
3046	/*
3047	* Load the state and validate it.
3048	*/
3049	uint8_t u8State;
3050	int rc = SSMR3GetU8(pSSM, &u8State);
3051	if (RT_FAILURE(rc))
3052	return rc;
3053
3054	/* TMTIMERSTATE_SAVED_XXX: Workaround for accidental state shift in r47786 (2009-05-26 19:12:12). */
3055	if ( u8State == TMTIMERSTATE_SAVED_PENDING_STOP + 1
3056	\|\| u8State == TMTIMERSTATE_SAVED_PENDING_SCHEDULE + 1)
3057	u8State--;
3058
3059	if ( u8State != TMTIMERSTATE_SAVED_PENDING_STOP
3060	&& u8State != TMTIMERSTATE_SAVED_PENDING_SCHEDULE)
3061	{
3062	AssertLogRelMsgFailed(("u8State=%d\n", u8State));
3063	return SSMR3HandleSetStatus(pSSM, VERR_TM_LOAD_STATE);
3064	}
3065
3066	*pfActive = (u8State == TMTIMERSTATE_SAVED_PENDING_SCHEDULE);
3067	if (*pfActive)
3068	{
3069	/*
3070	* Load the expire time.
3071	*/
3072	uint64_t u64Expire;
3073	rc = SSMR3GetU64(pSSM, &u64Expire);
3074	}
3075
3076	return rc;
3077	}
3078
3079
3080	/**
3081	* Associates a critical section with a timer.
3082	*
3083	* The critical section will be entered prior to doing the timer call back, thus
3084	* avoiding potential races between the timer thread and other threads trying to
3085	* stop or adjust the timer expiration while it's being delivered. The timer
3086	* thread will leave the critical section when the timer callback returns.
3087	*
3088	* In strict builds, ownership of the critical section will be asserted by
3089	* TMTimerSet, TMTimerStop, TMTimerGetExpire and TMTimerDestroy (when called at
3090	* runtime).
3091	*
3092	* @retval VINF_SUCCESS on success.
3093	* @retval VERR_INVALID_HANDLE if the timer handle is NULL or invalid
3094	* (asserted).
3095	* @retval VERR_INVALID_PARAMETER if pCritSect is NULL or has an invalid magic
3096	* (asserted).
3097	* @retval VERR_ALREADY_EXISTS if a critical section was already associated
3098	* with the timer (asserted).
3099	* @retval VERR_INVALID_STATE if the timer isn't stopped.
3100	*
3101	* @param pVM The cross context VM structure.
3102	* @param hTimer The timer handle.
3103	* @param pCritSect The critical section. The caller must make sure this
3104	* is around for the life time of the timer.
3105	*
3106	* @thread Any, but the caller is responsible for making sure the timer is not
3107	* active.
3108	*/
3109	VMMR3DECL(int) TMR3TimerSetCritSect(PVM pVM, TMTIMERHANDLE hTimer, PPDMCRITSECT pCritSect)
3110	{
3111	TMTIMER_HANDLE_TO_VARS_RETURN(pVM, hTimer); /* => pTimer, pQueueCC, pQueue, idxTimer, idxQueue */
3112	AssertPtrReturn(pCritSect, VERR_INVALID_PARAMETER);
3113	const char pszName = PDMR3CritSectName(pCritSect); / exploited for validation */
3114	AssertReturn(pszName, VERR_INVALID_PARAMETER);
3115	AssertReturn(!pTimer->pCritSect, VERR_ALREADY_EXISTS);
3116	AssertReturn(pTimer->enmState == TMTIMERSTATE_STOPPED, VERR_INVALID_STATE);
3117	LogFlow(("pTimer=%p (%s) pCritSect=%p (%s)\n", pTimer, pTimer->szName, pCritSect, pszName));
3118
3119	pTimer->pCritSect = pCritSect;
3120	return VINF_SUCCESS;
3121	}
3122
3123
3124	/**
3125	* Get the real world UTC time adjusted for VM lag.
3126	*
3127	* @returns pTime.
3128	* @param pVM The cross context VM structure.
3129	* @param pTime Where to store the time.
3130	*/
3131	VMMR3_INT_DECL(PRTTIMESPEC) TMR3UtcNow(PVM pVM, PRTTIMESPEC pTime)
3132	{
3133	/*
3134	* Get a stable set of VirtualSync parameters and calc the lag.
3135	*/
3136	uint64_t offVirtualSync;
3137	uint64_t offVirtualSyncGivenUp;
3138	do
3139	{
3140	offVirtualSync = ASMAtomicReadU64(&pVM->tm.s.offVirtualSync);
3141	offVirtualSyncGivenUp = ASMAtomicReadU64((uint64_t volatile *)&pVM->tm.s.offVirtualSyncGivenUp);
3142	} while (ASMAtomicReadU64(&pVM->tm.s.offVirtualSync) != offVirtualSync);
3143
3144	Assert(offVirtualSync >= offVirtualSyncGivenUp);
3145	uint64_t const offLag = offVirtualSync - offVirtualSyncGivenUp;
3146
3147	/*
3148	* Get current time and adjust for virtual sync lag and do time displacement.
3149	*/
3150	RTTimeNow(pTime);
3151	RTTimeSpecSubNano(pTime, offLag);
3152	RTTimeSpecAddNano(pTime, pVM->tm.s.offUTC);
3153
3154	/*
3155	* Log details if the time changed radically (also triggers on first call).
3156	*/
3157	int64_t nsPrev = ASMAtomicXchgS64(&pVM->tm.s.nsLastUtcNow, RTTimeSpecGetNano(pTime));
3158	int64_t cNsDelta = RTTimeSpecGetNano(pTime) - nsPrev;
3159	if ((uint64_t)RT_ABS(cNsDelta) > RT_NS_1HOUR / 2)
3160	{
3161	RTTIMESPEC NowAgain;
3162	RTTimeNow(&NowAgain);
3163	LogRel(("TMR3UtcNow: nsNow=%'RI64 nsPrev=%'RI64 -> cNsDelta=%'RI64 (offLag=%'RI64 offVirtualSync=%'RU64 offVirtualSyncGivenUp=%'RU64, NowAgain=%'RI64)\n",
3164	RTTimeSpecGetNano(pTime), nsPrev, cNsDelta, offLag, offVirtualSync, offVirtualSyncGivenUp, RTTimeSpecGetNano(&NowAgain)));
3165	if (pVM->tm.s.pszUtcTouchFileOnJump && nsPrev != 0)
3166	{
3167	RTFILE hFile;
3168	int rc = RTFileOpen(&hFile, pVM->tm.s.pszUtcTouchFileOnJump,
3169	RTFILE_O_WRITE \| RTFILE_O_APPEND \| RTFILE_O_OPEN_CREATE \| RTFILE_O_DENY_NONE);
3170	if (RT_SUCCESS(rc))
3171	{
3172	char szMsg[256];
3173	size_t cch;
3174	cch = RTStrPrintf(szMsg, sizeof(szMsg),
3175	"TMR3UtcNow: nsNow=%'RI64 nsPrev=%'RI64 -> cNsDelta=%'RI64 (offLag=%'RI64 offVirtualSync=%'RU64 offVirtualSyncGivenUp=%'RU64, NowAgain=%'RI64)\n",
3176	RTTimeSpecGetNano(pTime), nsPrev, cNsDelta, offLag, offVirtualSync, offVirtualSyncGivenUp, RTTimeSpecGetNano(&NowAgain));
3177	RTFileWrite(hFile, szMsg, cch, NULL);
3178	RTFileClose(hFile);
3179	}
3180	}
3181	}
3182
3183	return pTime;
3184	}
3185
3186
3187	/**
3188	* Pauses all clocks except TMCLOCK_REAL.
3189	*
3190	* @returns VBox status code, all errors are asserted.
3191	* @param pVM The cross context VM structure.
3192	* @param pVCpu The cross context virtual CPU structure.
3193	* @thread EMT corresponding to Pointer to the VMCPU.
3194	*/
3195	VMMR3DECL(int) TMR3NotifySuspend(PVM pVM, PVMCPU pVCpu)
3196	{
3197	VMCPU_ASSERT_EMT(pVCpu);
3198	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED); /* Paranoia: Exploiting the virtual sync lock here. */
3199
3200	/*
3201	* The shared virtual clock (includes virtual sync which is tied to it).
3202	*/
3203	int rc = tmVirtualPauseLocked(pVM);
3204	AssertRCReturnStmt(rc, PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock), rc);
3205
3206	/*
3207	* Pause the TSC last since it is normally linked to the virtual
3208	* sync clock, so the above code may actually stop both clocks.
3209	*/
3210	if (!pVM->tm.s.fTSCTiedToExecution)
3211	{
3212	rc = tmCpuTickPauseLocked(pVM, pVCpu);
3213	AssertRCReturnStmt(rc, PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock), rc);
3214	}
3215
3216	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
3217	/*
3218	* Update cNsTotal and stats.
3219	*/
3220	Assert(!pVCpu->tm.s.fSuspended);
3221	uint64_t const cNsTotalNew = RTTimeNanoTS() - pVCpu->tm.s.nsStartTotal;
3222	uint64_t const cNsOtherNew = cNsTotalNew - pVCpu->tm.s.cNsExecuting - pVCpu->tm.s.cNsHalted;
3223
3224	# if defined(VBOX_WITH_STATISTICS) \|\| defined(VBOX_WITH_NS_ACCOUNTING_STATS)
3225	STAM_REL_COUNTER_ADD(&pVCpu->tm.s.StatNsTotal, cNsTotalNew - pVCpu->tm.s.cNsTotalStat);
3226	int64_t const cNsOtherNewDelta = cNsOtherNew - pVCpu->tm.s.cNsOtherStat;
3227	if (cNsOtherNewDelta > 0)
3228	STAM_REL_COUNTER_ADD(&pVCpu->tm.s.StatNsOther, (uint64_t)cNsOtherNewDelta);
3229	# endif
3230
3231	uint32_t uGen = ASMAtomicIncU32(&pVCpu->tm.s.uTimesGen); Assert(uGen & 1);
3232	pVCpu->tm.s.nsStartTotal = cNsTotalNew;
3233	pVCpu->tm.s.fSuspended = true;
3234	pVCpu->tm.s.cNsTotalStat = cNsTotalNew;
3235	pVCpu->tm.s.cNsOtherStat = cNsOtherNew;
3236	ASMAtomicWriteU32(&pVCpu->tm.s.uTimesGen, (uGen \| 1) + 1);
3237	#endif
3238
3239	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
3240	return VINF_SUCCESS;
3241	}
3242
3243
3244	/**
3245	* Resumes all clocks except TMCLOCK_REAL.
3246	*
3247	* @returns VBox status code, all errors are asserted.
3248	* @param pVM The cross context VM structure.
3249	* @param pVCpu The cross context virtual CPU structure.
3250	* @thread EMT corresponding to Pointer to the VMCPU.
3251	*/
3252	VMMR3DECL(int) TMR3NotifyResume(PVM pVM, PVMCPU pVCpu)
3253	{
3254	VMCPU_ASSERT_EMT(pVCpu);
3255	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED); /* Paranoia: Exploiting the virtual sync lock here. */
3256
3257	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
3258	/*
3259	* Set u64NsTsStartTotal. There is no need to back this out if either of
3260	* the two calls below fail.
3261	*/
3262	uint32_t uGen = ASMAtomicIncU32(&pVCpu->tm.s.uTimesGen); Assert(uGen & 1);
3263	pVCpu->tm.s.nsStartTotal = RTTimeNanoTS() - pVCpu->tm.s.nsStartTotal;
3264	pVCpu->tm.s.fSuspended = false;
3265	ASMAtomicWriteU32(&pVCpu->tm.s.uTimesGen, (uGen \| 1) + 1);
3266	#endif
3267
3268	/*
3269	* Resume the TSC first since it is normally linked to the virtual sync
3270	* clock, so it may actually not be resumed until we've executed the code
3271	* below.
3272	*/
3273	if (!pVM->tm.s.fTSCTiedToExecution)
3274	{
3275	int rc = tmCpuTickResumeLocked(pVM, pVCpu);
3276	AssertRCReturnStmt(rc, PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock), rc);
3277	}
3278
3279	/*
3280	* The shared virtual clock (includes virtual sync which is tied to it).
3281	*/
3282	int rc = tmVirtualResumeLocked(pVM);
3283
3284	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
3285	return rc;
3286	}
3287
3288
3289	/**
3290	* Sets the warp drive percent of the virtual time.
3291	*
3292	* @returns VBox status code.
3293	* @param pUVM The user mode VM structure.
3294	* @param u32Percent The new percentage. 100 means normal operation.
3295	*/
3296	VMMDECL(int) TMR3SetWarpDrive(PUVM pUVM, uint32_t u32Percent)
3297	{
3298	return VMR3ReqPriorityCallWaitU(pUVM, VMCPUID_ANY, (PFNRT)tmR3SetWarpDrive, 2, pUVM, u32Percent);
3299	}
3300
3301
3302	/**
3303	* EMT worker for TMR3SetWarpDrive.
3304	*
3305	* @returns VBox status code.
3306	* @param pUVM The user mode VM handle.
3307	* @param u32Percent See TMR3SetWarpDrive().
3308	* @internal
3309	*/
3310	static DECLCALLBACK(int) tmR3SetWarpDrive(PUVM pUVM, uint32_t u32Percent)
3311	{
3312	PVM pVM = pUVM->pVM;
3313	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
3314	PVMCPU pVCpu = VMMGetCpu(pVM);
3315
3316	/*
3317	* Validate it.
3318	*/
3319	AssertMsgReturn(u32Percent >= 2 && u32Percent <= 20000,
3320	("%RX32 is not between 2 and 20000 (inclusive).\n", u32Percent),
3321	VERR_INVALID_PARAMETER);
3322
3323	/** @todo This isn't a feature specific to virtual time, move the variables to
3324	* TM level and make it affect TMR3UTCNow as well! */
3325
3326	PDMCritSectEnter(pVM, &pVM->tm.s.VirtualSyncLock, VERR_IGNORED); /* Paranoia: Exploiting the virtual sync lock here. */
3327
3328	/*
3329	* If the time is running we'll have to pause it before we can change
3330	* the warp drive settings.
3331	*/
3332	bool fPaused = !!pVM->tm.s.cVirtualTicking;
3333	if (fPaused) /** @todo this isn't really working, but wtf. */
3334	TMR3NotifySuspend(pVM, pVCpu);
3335
3336	/** @todo Should switch TM mode to virt-tsc-emulated if it isn't already! */
3337	pVM->tm.s.u32VirtualWarpDrivePercentage = u32Percent;
3338	pVM->tm.s.fVirtualWarpDrive = u32Percent != 100;
3339	LogRel(("TM: u32VirtualWarpDrivePercentage=%RI32 fVirtualWarpDrive=%RTbool\n",
3340	pVM->tm.s.u32VirtualWarpDrivePercentage, pVM->tm.s.fVirtualWarpDrive));
3341
3342	if (fPaused)
3343	TMR3NotifyResume(pVM, pVCpu);
3344
3345	PDMCritSectLeave(pVM, &pVM->tm.s.VirtualSyncLock);
3346	return VINF_SUCCESS;
3347	}
3348
3349
3350	/**
3351	* Gets the current TMCLOCK_VIRTUAL time without checking
3352	* timers or anything.
3353	*
3354	* @returns The timestamp.
3355	* @param pUVM The user mode VM structure.
3356	*
3357	* @remarks See TMVirtualGetNoCheck.
3358	*/
3359	VMMR3DECL(uint64_t) TMR3TimeVirtGet(PUVM pUVM)
3360	{
3361	UVM_ASSERT_VALID_EXT_RETURN(pUVM, UINT64_MAX);
3362	PVM pVM = pUVM->pVM;
3363	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT64_MAX);
3364	return TMVirtualGetNoCheck(pVM);
3365	}
3366
3367
3368	/**
3369	* Gets the current TMCLOCK_VIRTUAL time in milliseconds without checking
3370	* timers or anything.
3371	*
3372	* @returns The timestamp in milliseconds.
3373	* @param pUVM The user mode VM structure.
3374	*
3375	* @remarks See TMVirtualGetNoCheck.
3376	*/
3377	VMMR3DECL(uint64_t) TMR3TimeVirtGetMilli(PUVM pUVM)
3378	{
3379	UVM_ASSERT_VALID_EXT_RETURN(pUVM, UINT64_MAX);
3380	PVM pVM = pUVM->pVM;
3381	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT64_MAX);
3382	return TMVirtualToMilli(pVM, TMVirtualGetNoCheck(pVM));
3383	}
3384
3385
3386	/**
3387	* Gets the current TMCLOCK_VIRTUAL time in microseconds without checking
3388	* timers or anything.
3389	*
3390	* @returns The timestamp in microseconds.
3391	* @param pUVM The user mode VM structure.
3392	*
3393	* @remarks See TMVirtualGetNoCheck.
3394	*/
3395	VMMR3DECL(uint64_t) TMR3TimeVirtGetMicro(PUVM pUVM)
3396	{
3397	UVM_ASSERT_VALID_EXT_RETURN(pUVM, UINT64_MAX);
3398	PVM pVM = pUVM->pVM;
3399	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT64_MAX);
3400	return TMVirtualToMicro(pVM, TMVirtualGetNoCheck(pVM));
3401	}
3402
3403
3404	/**
3405	* Gets the current TMCLOCK_VIRTUAL time in nanoseconds without checking
3406	* timers or anything.
3407	*
3408	* @returns The timestamp in nanoseconds.
3409	* @param pUVM The user mode VM structure.
3410	*
3411	* @remarks See TMVirtualGetNoCheck.
3412	*/
3413	VMMR3DECL(uint64_t) TMR3TimeVirtGetNano(PUVM pUVM)
3414	{
3415	UVM_ASSERT_VALID_EXT_RETURN(pUVM, UINT64_MAX);
3416	PVM pVM = pUVM->pVM;
3417	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT64_MAX);
3418	return TMVirtualToNano(pVM, TMVirtualGetNoCheck(pVM));
3419	}
3420
3421
3422	/**
3423	* Gets the current warp drive percent.
3424	*
3425	* @returns The warp drive percent.
3426	* @param pUVM The user mode VM structure.
3427	*/
3428	VMMR3DECL(uint32_t) TMR3GetWarpDrive(PUVM pUVM)
3429	{
3430	UVM_ASSERT_VALID_EXT_RETURN(pUVM, UINT32_MAX);
3431	PVM pVM = pUVM->pVM;
3432	VM_ASSERT_VALID_EXT_RETURN(pVM, UINT32_MAX);
3433	return pVM->tm.s.u32VirtualWarpDrivePercentage;
3434	}
3435
3436
3437	#if 0 /* unused - needs a little updating after @bugref{9941}*/
3438	/**
3439	* Gets the performance information for one virtual CPU as seen by the VMM.
3440	*
3441	* The returned times covers the period where the VM is running and will be
3442	* reset when restoring a previous VM state (at least for the time being).
3443	*
3444	* @retval VINF_SUCCESS on success.
3445	* @retval VERR_NOT_IMPLEMENTED if not compiled in.
3446	* @retval VERR_INVALID_STATE if the VM handle is bad.
3447	* @retval VERR_INVALID_CPU_ID if idCpu is out of range.
3448	*
3449	* @param pVM The cross context VM structure.
3450	* @param idCpu The ID of the virtual CPU which times to get.
3451	* @param pcNsTotal Where to store the total run time (nano seconds) of
3452	* the CPU, i.e. the sum of the three other returns.
3453	* Optional.
3454	* @param pcNsExecuting Where to store the time (nano seconds) spent
3455	* executing guest code. Optional.
3456	* @param pcNsHalted Where to store the time (nano seconds) spent
3457	* halted. Optional
3458	* @param pcNsOther Where to store the time (nano seconds) spent
3459	* preempted by the host scheduler, on virtualization
3460	* overhead and on other tasks.
3461	*/
3462	VMMR3DECL(int) TMR3GetCpuLoadTimes(PVM pVM, VMCPUID idCpu, uint64_t pcNsTotal, uint64_t pcNsExecuting,
3463	uint64_t pcNsHalted, uint64_t pcNsOther)
3464	{
3465	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_STATE);
3466	AssertReturn(idCpu < pVM->cCpus, VERR_INVALID_CPU_ID);
3467
3468	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
3469	/*
3470	* Get a stable result set.
3471	* This should be way quicker than an EMT request.
3472	*/
3473	PVMCPU pVCpu = pVM->apCpusR3[idCpu];
3474	uint32_t uTimesGen = ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen);
3475	uint64_t cNsTotal = pVCpu->tm.s.cNsTotal;
3476	uint64_t cNsExecuting = pVCpu->tm.s.cNsExecuting;
3477	uint64_t cNsHalted = pVCpu->tm.s.cNsHalted;
3478	uint64_t cNsOther = pVCpu->tm.s.cNsOther;
3479	while ( (uTimesGen & 1) /* update in progress */
3480	\|\| uTimesGen != ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen))
3481	{
3482	RTThreadYield();
3483	uTimesGen = ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen);
3484	cNsTotal = pVCpu->tm.s.cNsTotal;
3485	cNsExecuting = pVCpu->tm.s.cNsExecuting;
3486	cNsHalted = pVCpu->tm.s.cNsHalted;
3487	cNsOther = pVCpu->tm.s.cNsOther;
3488	}
3489
3490	/*
3491	* Fill in the return values.
3492	*/
3493	if (pcNsTotal)
3494	*pcNsTotal = cNsTotal;
3495	if (pcNsExecuting)
3496	*pcNsExecuting = cNsExecuting;
3497	if (pcNsHalted)
3498	*pcNsHalted = cNsHalted;
3499	if (pcNsOther)
3500	*pcNsOther = cNsOther;
3501
3502	return VINF_SUCCESS;
3503
3504	#else
3505	return VERR_NOT_IMPLEMENTED;
3506	#endif
3507	}
3508	#endif /* unused */
3509
3510
3511	/**
3512	* Gets the performance information for one virtual CPU as seen by the VMM in
3513	* percents.
3514	*
3515	* The returned times covers the period where the VM is running and will be
3516	* reset when restoring a previous VM state (at least for the time being).
3517	*
3518	* @retval VINF_SUCCESS on success.
3519	* @retval VERR_NOT_IMPLEMENTED if not compiled in.
3520	* @retval VERR_INVALID_VM_HANDLE if the VM handle is bad.
3521	* @retval VERR_INVALID_CPU_ID if idCpu is out of range.
3522	*
3523	* @param pUVM The usermode VM structure.
3524	* @param idCpu The ID of the virtual CPU which times to get.
3525	* @param pcMsInterval Where to store the interval of the percentages in
3526	* milliseconds. Optional.
3527	* @param pcPctExecuting Where to return the percentage of time spent
3528	* executing guest code. Optional.
3529	* @param pcPctHalted Where to return the percentage of time spent halted.
3530	* Optional
3531	* @param pcPctOther Where to return the percentage of time spent
3532	* preempted by the host scheduler, on virtualization
3533	* overhead and on other tasks.
3534	*/
3535	VMMR3DECL(int) TMR3GetCpuLoadPercents(PUVM pUVM, VMCPUID idCpu, uint64_t pcMsInterval, uint8_t pcPctExecuting,
3536	uint8_t pcPctHalted, uint8_t pcPctOther)
3537	{
3538	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
3539	PVM pVM = pUVM->pVM;
3540	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
3541	AssertReturn(idCpu == VMCPUID_ALL \|\| idCpu < pVM->cCpus, VERR_INVALID_CPU_ID);
3542
3543	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
3544	TMCPULOADSTATE volatile *pState;
3545	if (idCpu == VMCPUID_ALL)
3546	pState = &pVM->tm.s.CpuLoad;
3547	else
3548	pState = &pVM->apCpusR3[idCpu]->tm.s.CpuLoad;
3549
3550	if (pcMsInterval)
3551	*pcMsInterval = RT_MS_1SEC;
3552	if (pcPctExecuting)
3553	*pcPctExecuting = pState->cPctExecuting;
3554	if (pcPctHalted)
3555	*pcPctHalted = pState->cPctHalted;
3556	if (pcPctOther)
3557	*pcPctOther = pState->cPctOther;
3558
3559	return VINF_SUCCESS;
3560
3561	#else
3562	RT_NOREF(pcMsInterval, pcPctExecuting, pcPctHalted, pcPctOther);
3563	return VERR_NOT_IMPLEMENTED;
3564	#endif
3565	}
3566
3567	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
3568
3569	/**
3570	* Helper for tmR3CpuLoadTimer.
3571	* @returns
3572	* @param pState The state to update.
3573	* @param cNsTotal Total time.
3574	* @param cNsExecuting Time executing.
3575	* @param cNsHalted Time halted.
3576	*/
3577	DECLINLINE(void) tmR3CpuLoadTimerMakeUpdate(PTMCPULOADSTATE pState, uint64_t cNsTotal, uint64_t cNsExecuting, uint64_t cNsHalted)
3578	{
3579	/* Calc & update deltas */
3580	uint64_t cNsTotalDelta = cNsTotal - pState->cNsPrevTotal;
3581	uint64_t cNsExecutingDelta = cNsExecuting - pState->cNsPrevExecuting;
3582	uint64_t cNsHaltedDelta = cNsHalted - pState->cNsPrevHalted;
3583
3584	if (cNsExecutingDelta + cNsHaltedDelta <= cNsTotalDelta)
3585	{ /* likely */ }
3586	else
3587	{
3588	/* Just adjust the executing and halted values down to match the total delta. */
3589	uint64_t const cNsExecAndHalted = cNsExecutingDelta + cNsHaltedDelta;
3590	uint64_t const cNsAdjust = cNsExecAndHalted - cNsTotalDelta + cNsTotalDelta / 64;
3591	cNsExecutingDelta -= (cNsAdjust * cNsExecutingDelta + cNsExecAndHalted - 1) / cNsExecAndHalted;
3592	cNsHaltedDelta -= (cNsAdjust * cNsHaltedDelta + cNsExecAndHalted - 1) / cNsExecAndHalted;
3593	/Assert(cNsExecutingDelta + cNsHaltedDelta <= cNsTotalDelta); - annoying when debugging /
3594	}
3595
3596	pState->cNsPrevExecuting = cNsExecuting;
3597	pState->cNsPrevHalted = cNsHalted;
3598	pState->cNsPrevTotal = cNsTotal;
3599
3600	/* Calc pcts. */
3601	uint8_t cPctExecuting, cPctHalted, cPctOther;
3602	if (!cNsTotalDelta)
3603	{
3604	cPctExecuting = 0;
3605	cPctHalted = 100;
3606	cPctOther = 0;
3607	}
3608	else if (cNsTotalDelta < UINT64_MAX / 4)
3609	{
3610	cPctExecuting = (uint8_t)(cNsExecutingDelta * 100 / cNsTotalDelta);
3611	cPctHalted = (uint8_t)(cNsHaltedDelta * 100 / cNsTotalDelta);
3612	cPctOther = (uint8_t)((cNsTotalDelta - cNsExecutingDelta - cNsHaltedDelta) * 100 / cNsTotalDelta);
3613	}
3614	else
3615	{
3616	cPctExecuting = 0;
3617	cPctHalted = 100;
3618	cPctOther = 0;
3619	}
3620
3621	/* Update percentages: */
3622	size_t idxHistory = pState->idxHistory + 1;
3623	if (idxHistory >= RT_ELEMENTS(pState->aHistory))
3624	idxHistory = 0;
3625
3626	pState->cPctExecuting = cPctExecuting;
3627	pState->cPctHalted = cPctHalted;
3628	pState->cPctOther = cPctOther;
3629
3630	pState->aHistory[idxHistory].cPctExecuting = cPctExecuting;
3631	pState->aHistory[idxHistory].cPctHalted = cPctHalted;
3632	pState->aHistory[idxHistory].cPctOther = cPctOther;
3633
3634	pState->idxHistory = (uint16_t)idxHistory;
3635	if (pState->cHistoryEntries < RT_ELEMENTS(pState->aHistory))
3636	pState->cHistoryEntries++;
3637	}
3638
3639
3640	/**
3641	* @callback_method_impl{FNTMTIMERINT,
3642	* Timer callback that calculates the CPU load since the last
3643	* time it was called.}
3644	*/
3645	static DECLCALLBACK(void) tmR3CpuLoadTimer(PVM pVM, TMTIMERHANDLE hTimer, void *pvUser)
3646	{
3647	/*
3648	* Re-arm the timer first.
3649	*/
3650	int rc = TMTimerSetMillies(pVM, hTimer, 1000);
3651	AssertLogRelRC(rc);
3652	NOREF(pvUser);
3653
3654	/*
3655	* Update the values for each CPU.
3656	*/
3657	uint64_t cNsTotalAll = 0;
3658	uint64_t cNsExecutingAll = 0;
3659	uint64_t cNsHaltedAll = 0;
3660	for (VMCPUID iCpu = 0; iCpu < pVM->cCpus; iCpu++)
3661	{
3662	PVMCPU pVCpu = pVM->apCpusR3[iCpu];
3663
3664	/* Try get a stable data set. */
3665	uint32_t cTries = 3;
3666	uint64_t nsNow = RTTimeNanoTS();
3667	uint32_t uTimesGen = ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen);
3668	bool fSuspended = pVCpu->tm.s.fSuspended;
3669	uint64_t nsStartTotal = pVCpu->tm.s.nsStartTotal;
3670	uint64_t cNsExecuting = pVCpu->tm.s.cNsExecuting;
3671	uint64_t cNsHalted = pVCpu->tm.s.cNsHalted;
3672	while (RT_UNLIKELY( (uTimesGen & 1) /* update in progress */
3673	\|\| uTimesGen != ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen)))
3674	{
3675	if (!--cTries)
3676	break;
3677	ASMNopPause();
3678	nsNow = RTTimeNanoTS();
3679	uTimesGen = ASMAtomicReadU32(&pVCpu->tm.s.uTimesGen);
3680	fSuspended = pVCpu->tm.s.fSuspended;
3681	nsStartTotal = pVCpu->tm.s.nsStartTotal;
3682	cNsExecuting = pVCpu->tm.s.cNsExecuting;
3683	cNsHalted = pVCpu->tm.s.cNsHalted;
3684	}
3685
3686	/* Totals */
3687	uint64_t cNsTotal = fSuspended ? nsStartTotal : nsNow - nsStartTotal;
3688	cNsTotalAll += cNsTotal;
3689	cNsExecutingAll += cNsExecuting;
3690	cNsHaltedAll += cNsHalted;
3691
3692	/* Calc the PCTs and update the state. */
3693	tmR3CpuLoadTimerMakeUpdate(&pVCpu->tm.s.CpuLoad, cNsTotal, cNsExecuting, cNsHalted);
3694
3695	/* Tell the VCpu to update the other and total stat members. */
3696	ASMAtomicWriteBool(&pVCpu->tm.s.fUpdateStats, true);
3697	}
3698
3699	/*
3700	* Update the value for all the CPUs.
3701	*/
3702	tmR3CpuLoadTimerMakeUpdate(&pVM->tm.s.CpuLoad, cNsTotalAll, cNsExecutingAll, cNsHaltedAll);
3703
3704	}
3705
3706	#endif /* !VBOX_WITHOUT_NS_ACCOUNTING */
3707
3708
3709	/**
3710	* @callback_method_impl{PFNVMMEMTRENDEZVOUS,
3711	* Worker for TMR3CpuTickParavirtEnable}
3712	*/
3713	static DECLCALLBACK(VBOXSTRICTRC) tmR3CpuTickParavirtEnable(PVM pVM, PVMCPU pVCpuEmt, void *pvData)
3714	{
3715	AssertPtr(pVM); Assert(pVM->tm.s.fTSCModeSwitchAllowed); NOREF(pVCpuEmt); NOREF(pvData);
3716	Assert(pVM->tm.s.enmTSCMode != TMTSCMODE_NATIVE_API); /** @todo figure out NEM/win and paravirt */
3717	Assert(tmR3HasFixedTSC(pVM));
3718
3719	if (pVM->tm.s.enmTSCMode != TMTSCMODE_REAL_TSC_OFFSET)
3720	{
3721	/*
3722	* The return value of TMCpuTickGet() and the guest's TSC value for each
3723	* CPU must remain constant across the TM TSC mode-switch. Thus we have
3724	* the following equation (new/old signifies the new/old tsc modes):
3725	* uNewTsc = uOldTsc
3726	*
3727	* Where (see tmCpuTickGetInternal):
3728	* uOldTsc = uRawOldTsc - offTscRawSrcOld
3729	* uNewTsc = uRawNewTsc - offTscRawSrcNew
3730	*
3731	* Solve it for offTscRawSrcNew without replacing uOldTsc:
3732	* uRawNewTsc - offTscRawSrcNew = uOldTsc
3733	* => -offTscRawSrcNew = uOldTsc - uRawNewTsc
3734	* => offTscRawSrcNew = uRawNewTsc - uOldTsc
3735	*/
3736	uint64_t uRawOldTsc = tmR3CpuTickGetRawVirtualNoCheck(pVM);
3737	uint64_t uRawNewTsc = SUPReadTsc();
3738	uint32_t cCpus = pVM->cCpus;
3739	for (uint32_t i = 0; i < cCpus; i++)
3740	{
3741	PVMCPU pVCpu = pVM->apCpusR3[i];
3742	uint64_t uOldTsc = uRawOldTsc - pVCpu->tm.s.offTSCRawSrc;
3743	pVCpu->tm.s.offTSCRawSrc = uRawNewTsc - uOldTsc;
3744	Assert(uRawNewTsc - pVCpu->tm.s.offTSCRawSrc >= uOldTsc); /* paranoia^256 */
3745	}
3746
3747	LogRel(("TM: Switching TSC mode from '%s' to '%s'\n", tmR3GetTSCModeNameEx(pVM->tm.s.enmTSCMode),
3748	tmR3GetTSCModeNameEx(TMTSCMODE_REAL_TSC_OFFSET)));
3749	pVM->tm.s.enmTSCMode = TMTSCMODE_REAL_TSC_OFFSET;
3750	}
3751	return VINF_SUCCESS;
3752	}
3753
3754
3755	/**
3756	* Notify TM that the guest has enabled usage of a paravirtualized TSC.
3757	*
3758	* This may perform a EMT rendezvous and change the TSC virtualization mode.
3759	*
3760	* @returns VBox status code.
3761	* @param pVM The cross context VM structure.
3762	*/
3763	VMMR3_INT_DECL(int) TMR3CpuTickParavirtEnable(PVM pVM)
3764	{
3765	int rc = VINF_SUCCESS;
3766	if (pVM->tm.s.fTSCModeSwitchAllowed)
3767	rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, tmR3CpuTickParavirtEnable, NULL);
3768	else
3769	LogRel(("TM: Host/VM is not suitable for using TSC mode '%s', request to change TSC mode ignored\n",
3770	tmR3GetTSCModeNameEx(TMTSCMODE_REAL_TSC_OFFSET)));
3771	pVM->tm.s.fParavirtTscEnabled = true;
3772	return rc;
3773	}
3774
3775
3776	/**
3777	* @callback_method_impl{PFNVMMEMTRENDEZVOUS,
3778	* Worker for TMR3CpuTickParavirtDisable}
3779	*/
3780	static DECLCALLBACK(VBOXSTRICTRC) tmR3CpuTickParavirtDisable(PVM pVM, PVMCPU pVCpuEmt, void *pvData)
3781	{
3782	AssertPtr(pVM); Assert(pVM->tm.s.fTSCModeSwitchAllowed); NOREF(pVCpuEmt);
3783	RT_NOREF1(pvData);
3784
3785	if ( pVM->tm.s.enmTSCMode == TMTSCMODE_REAL_TSC_OFFSET
3786	&& pVM->tm.s.enmTSCMode != pVM->tm.s.enmOriginalTSCMode)
3787	{
3788	/*
3789	* See tmR3CpuTickParavirtEnable for an explanation of the conversion math.
3790	*/
3791	uint64_t uRawOldTsc = SUPReadTsc();
3792	uint64_t uRawNewTsc = tmR3CpuTickGetRawVirtualNoCheck(pVM);
3793	uint32_t cCpus = pVM->cCpus;
3794	for (uint32_t i = 0; i < cCpus; i++)
3795	{
3796	PVMCPU pVCpu = pVM->apCpusR3[i];
3797	uint64_t uOldTsc = uRawOldTsc - pVCpu->tm.s.offTSCRawSrc;
3798	pVCpu->tm.s.offTSCRawSrc = uRawNewTsc - uOldTsc;
3799	Assert(uRawNewTsc - pVCpu->tm.s.offTSCRawSrc >= uOldTsc); /* paranoia^256 */
3800
3801	/* Update the last-seen tick here as we havent't been updating it (as we don't
3802	need it) while in pure TSC-offsetting mode. */
3803	pVCpu->tm.s.u64TSCLastSeen = uOldTsc;
3804	}
3805
3806	LogRel(("TM: Switching TSC mode from '%s' to '%s'\n", tmR3GetTSCModeNameEx(pVM->tm.s.enmTSCMode),
3807	tmR3GetTSCModeNameEx(pVM->tm.s.enmOriginalTSCMode)));
3808	pVM->tm.s.enmTSCMode = pVM->tm.s.enmOriginalTSCMode;
3809	}
3810	return VINF_SUCCESS;
3811	}
3812
3813
3814	/**
3815	* Notify TM that the guest has disabled usage of a paravirtualized TSC.
3816	*
3817	* If TMR3CpuTickParavirtEnable() changed the TSC virtualization mode, this will
3818	* perform an EMT rendezvous to revert those changes.
3819	*
3820	* @returns VBox status code.
3821	* @param pVM The cross context VM structure.
3822	*/
3823	VMMR3_INT_DECL(int) TMR3CpuTickParavirtDisable(PVM pVM)
3824	{
3825	int rc = VINF_SUCCESS;
3826	if (pVM->tm.s.fTSCModeSwitchAllowed)
3827	rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, tmR3CpuTickParavirtDisable, NULL);
3828	pVM->tm.s.fParavirtTscEnabled = false;
3829	return rc;
3830	}
3831
3832
3833	/**
3834	* Check whether the guest can be presented a fixed rate & monotonic TSC.
3835	*
3836	* @returns true if TSC is stable, false otherwise.
3837	* @param pVM The cross context VM structure.
3838	* @param fWithParavirtEnabled Whether it's fixed & monotonic when
3839	* paravirt. TSC is enabled or not.
3840	*
3841	* @remarks Must be called only after TMR3InitFinalize().
3842	*/
3843	VMMR3_INT_DECL(bool) TMR3CpuTickIsFixedRateMonotonic(PVM pVM, bool fWithParavirtEnabled)
3844	{
3845	/** @todo figure out what exactly we want here later. */
3846	NOREF(fWithParavirtEnabled);
3847	PSUPGLOBALINFOPAGE pGip;
3848	return tmR3HasFixedTSC(pVM) /* Host has fixed-rate TSC. */
3849	&& ( (pGip = g_pSUPGlobalInfoPage) == NULL /* Can be NULL in driverless mode. */
3850	\|\| (pGip->u32Mode != SUPGIPMODE_ASYNC_TSC)); /* GIP thinks it's monotonic. */
3851	}
3852
3853
3854	/**
3855	* Gets the 5 char clock name for the info tables.
3856	*
3857	* @returns The name.
3858	* @param enmClock The clock.
3859	*/
3860	DECLINLINE(const char *) tmR3Get5CharClockName(TMCLOCK enmClock)
3861	{
3862	switch (enmClock)
3863	{
3864	case TMCLOCK_REAL: return "Real ";
3865	case TMCLOCK_VIRTUAL: return "Virt ";
3866	case TMCLOCK_VIRTUAL_SYNC: return "VrSy ";
3867	case TMCLOCK_TSC: return "TSC ";
3868	default: return "Bad ";
3869	}
3870	}
3871
3872
3873	/**
3874	* Display all timers.
3875	*
3876	* @param pVM The cross context VM structure.
3877	* @param pHlp The info helpers.
3878	* @param pszArgs Arguments, ignored.
3879	*/
3880	static DECLCALLBACK(void) tmR3TimerInfo(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
3881	{
3882	NOREF(pszArgs);
3883	pHlp->pfnPrintf(pHlp,
3884	"Timers (pVM=%p)\n"
3885	"%.s %.s %.s %.s Clock %18s %18s %6s %-25s Description\n",
3886	pVM,
3887	sizeof(RTR3PTR) * 2, "pTimerR3 ",
3888	sizeof(int32_t) * 2, "offNext ",
3889	sizeof(int32_t) * 2, "offPrev ",
3890	sizeof(int32_t) * 2, "offSched ",
3891	"Time",
3892	"Expire",
3893	"HzHint",
3894	"State");
3895	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
3896	{
3897	PTMTIMERQUEUE const pQueue = &pVM->tm.s.aTimerQueues[idxQueue];
3898	const char * const pszClock = tmR3Get5CharClockName(pQueue->enmClock);
3899	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
3900	for (uint32_t idxTimer = 0; idxTimer < pQueue->cTimersAlloc; idxTimer++)
3901	{
3902	PTMTIMER pTimer = &pQueue->paTimers[idxTimer];
3903	TMTIMERSTATE enmState = pTimer->enmState;
3904	if (enmState < TMTIMERSTATE_DESTROY && enmState > TMTIMERSTATE_INVALID)
3905	pHlp->pfnPrintf(pHlp,
3906	"%p %08RX32 %08RX32 %08RX32 %s %18RU64 %18RU64 %6RU32 %-25s %s\n",
3907	pTimer,
3908	pTimer->idxNext,
3909	pTimer->idxPrev,
3910	pTimer->idxScheduleNext,
3911	pszClock,
3912	TMTimerGet(pVM, pTimer->hSelf),
3913	pTimer->u64Expire,
3914	pTimer->uHzHint,
3915	tmTimerState(enmState),
3916	pTimer->szName);
3917	}
3918	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
3919	}
3920	}
3921
3922
3923	/**
3924	* Display all active timers.
3925	*
3926	* @param pVM The cross context VM structure.
3927	* @param pHlp The info helpers.
3928	* @param pszArgs Arguments, ignored.
3929	*/
3930	static DECLCALLBACK(void) tmR3TimerInfoActive(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
3931	{
3932	NOREF(pszArgs);
3933	pHlp->pfnPrintf(pHlp,
3934	"Active Timers (pVM=%p)\n"
3935	"%.s %.s %.s %.s Clock %18s %18s %6s %-25s Description\n",
3936	pVM,
3937	sizeof(RTR3PTR) * 2, "pTimerR3 ",
3938	sizeof(int32_t) * 2, "offNext ",
3939	sizeof(int32_t) * 2, "offPrev ",
3940	sizeof(int32_t) * 2, "offSched ",
3941	"Time",
3942	"Expire",
3943	"HzHint",
3944	"State");
3945	for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pVM->tm.s.aTimerQueues); idxQueue++)
3946	{
3947	PTMTIMERQUEUE const pQueue = &pVM->tm.s.aTimerQueues[idxQueue];
3948	const char * const pszClock = tmR3Get5CharClockName(pQueue->enmClock);
3949	PDMCritSectRwEnterShared(pVM, &pQueue->AllocLock, VERR_IGNORED);
3950	PDMCritSectEnter(pVM, &pQueue->TimerLock, VERR_IGNORED);
3951
3952	for (PTMTIMERR3 pTimer = tmTimerQueueGetHead(pQueue, pQueue);
3953	pTimer;
3954	pTimer = tmTimerGetNext(pQueue, pTimer))
3955	{
3956	pHlp->pfnPrintf(pHlp,
3957	"%p %08RX32 %08RX32 %08RX32 %s %18RU64 %18RU64 %6RU32 %-25s %s\n",
3958	pTimer,
3959	pTimer->idxNext,
3960	pTimer->idxPrev,
3961	pTimer->idxScheduleNext,
3962	pszClock,
3963	TMTimerGet(pVM, pTimer->hSelf),
3964	pTimer->u64Expire,
3965	pTimer->uHzHint,
3966	tmTimerState(pTimer->enmState),
3967	pTimer->szName);
3968	}
3969
3970	PDMCritSectLeave(pVM, &pQueue->TimerLock);
3971	PDMCritSectRwLeaveShared(pVM, &pQueue->AllocLock);
3972	}
3973	}
3974
3975
3976	/**
3977	* Display all clocks.
3978	*
3979	* @param pVM The cross context VM structure.
3980	* @param pHlp The info helpers.
3981	* @param pszArgs Arguments, ignored.
3982	*/
3983	static DECLCALLBACK(void) tmR3InfoClocks(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
3984	{
3985	NOREF(pszArgs);
3986
3987	/*
3988	* Read the times first to avoid more than necessary time variation.
3989	*/
3990	const uint64_t u64Virtual = TMVirtualGet(pVM);
3991	const uint64_t u64VirtualSync = TMVirtualSyncGet(pVM);
3992	const uint64_t u64Real = TMRealGet(pVM);
3993
3994	for (VMCPUID i = 0; i < pVM->cCpus; i++)
3995	{
3996	PVMCPU pVCpu = pVM->apCpusR3[i];
3997	uint64_t u64TSC = TMCpuTickGet(pVCpu);
3998
3999	/*
4000	* TSC
4001	*/
4002	pHlp->pfnPrintf(pHlp,
4003	"Cpu Tick: %18RU64 (%#016RX64) %RU64Hz %s - virtualized",
4004	u64TSC, u64TSC, TMCpuTicksPerSecond(pVM),
4005	pVCpu->tm.s.fTSCTicking ? "ticking" : "paused");
4006	if (pVM->tm.s.enmTSCMode == TMTSCMODE_REAL_TSC_OFFSET)
4007	{
4008	pHlp->pfnPrintf(pHlp, " - real tsc offset");
4009	if (pVCpu->tm.s.offTSCRawSrc)
4010	pHlp->pfnPrintf(pHlp, "\n offset %RU64", pVCpu->tm.s.offTSCRawSrc);
4011	}
4012	else if (pVM->tm.s.enmTSCMode == TMTSCMODE_NATIVE_API)
4013	pHlp->pfnPrintf(pHlp, " - native api");
4014	else
4015	pHlp->pfnPrintf(pHlp, " - virtual clock");
4016	pHlp->pfnPrintf(pHlp, "\n");
4017	}
4018
4019	/*
4020	* virtual
4021	*/
4022	pHlp->pfnPrintf(pHlp,
4023	" Virtual: %18RU64 (%#016RX64) %RU64Hz %s",
4024	u64Virtual, u64Virtual, TMVirtualGetFreq(pVM),
4025	pVM->tm.s.cVirtualTicking ? "ticking" : "paused");
4026	if (pVM->tm.s.fVirtualWarpDrive)
4027	pHlp->pfnPrintf(pHlp, " WarpDrive %RU32 %%", pVM->tm.s.u32VirtualWarpDrivePercentage);
4028	pHlp->pfnPrintf(pHlp, "\n");
4029
4030	/*
4031	* virtual sync
4032	*/
4033	pHlp->pfnPrintf(pHlp,
4034	"VirtSync: %18RU64 (%#016RX64) %s%s",
4035	u64VirtualSync, u64VirtualSync,
4036	pVM->tm.s.fVirtualSyncTicking ? "ticking" : "paused",
4037	pVM->tm.s.fVirtualSyncCatchUp ? " - catchup" : "");
4038	if (pVM->tm.s.offVirtualSync)
4039	{
4040	pHlp->pfnPrintf(pHlp, "\n offset %RU64", pVM->tm.s.offVirtualSync);
4041	if (pVM->tm.s.u32VirtualSyncCatchUpPercentage)
4042	pHlp->pfnPrintf(pHlp, " catch-up rate %u %%", pVM->tm.s.u32VirtualSyncCatchUpPercentage);
4043	}
4044	pHlp->pfnPrintf(pHlp, "\n");
4045
4046	/*
4047	* real
4048	*/
4049	pHlp->pfnPrintf(pHlp,
4050	" Real: %18RU64 (%#016RX64) %RU64Hz\n",
4051	u64Real, u64Real, TMRealGetFreq(pVM));
4052	}
4053
4054
4055	/**
4056	* Helper for tmR3InfoCpuLoad that adjust @a uPct to the given graph width.
4057	*/
4058	DECLINLINE(size_t) tmR3InfoCpuLoadAdjustWidth(size_t uPct, size_t cchWidth)
4059	{
4060	if (cchWidth != 100)
4061	uPct = (uPct + 0.5) * (cchWidth / 100.0);
4062	return uPct;
4063	}
4064
4065
4066	/**
4067	* @callback_method_impl{FNDBGFINFOARGVINT}
4068	*/
4069	static DECLCALLBACK(void) tmR3InfoCpuLoad(PVM pVM, PCDBGFINFOHLP pHlp, int cArgs, char **papszArgs)
4070	{
4071	char szTmp[1024];
4072
4073	/*
4074	* Parse arguments.
4075	*/
4076	PTMCPULOADSTATE pState = &pVM->tm.s.CpuLoad;
4077	VMCPUID idCpu = 0;
4078	bool fAllCpus = true;
4079	bool fExpGraph = true;
4080	uint32_t cchWidth = 80;
4081	uint32_t cPeriods = RT_ELEMENTS(pState->aHistory);
4082	uint32_t cRows = 60;
4083
4084	static const RTGETOPTDEF s_aOptions[] =
4085	{
4086	{ "all", 'a', RTGETOPT_REQ_NOTHING },
4087	{ "cpu", 'c', RTGETOPT_REQ_UINT32 },
4088	{ "periods", 'p', RTGETOPT_REQ_UINT32 },
4089	{ "rows", 'r', RTGETOPT_REQ_UINT32 },
4090	{ "uni", 'u', RTGETOPT_REQ_NOTHING },
4091	{ "uniform", 'u', RTGETOPT_REQ_NOTHING },
4092	{ "width", 'w', RTGETOPT_REQ_UINT32 },
4093	{ "exp", 'x', RTGETOPT_REQ_NOTHING },
4094	{ "exponential", 'x', RTGETOPT_REQ_NOTHING },
4095	};
4096
4097	RTGETOPTSTATE State;
4098	int rc = RTGetOptInit(&State, cArgs, papszArgs, s_aOptions, RT_ELEMENTS(s_aOptions), 0, 0 /fFlags/);
4099	AssertRC(rc);
4100
4101	RTGETOPTUNION ValueUnion;
4102	while ((rc = RTGetOpt(&State, &ValueUnion)) != 0)
4103	{
4104	switch (rc)
4105	{
4106	case 'a':
4107	pState = &pVM->apCpusR3[0]->tm.s.CpuLoad;
4108	idCpu = 0;
4109	fAllCpus = true;
4110	break;
4111	case 'c':
4112	if (ValueUnion.u32 < pVM->cCpus)
4113	{
4114	pState = &pVM->apCpusR3[ValueUnion.u32]->tm.s.CpuLoad;
4115	idCpu = ValueUnion.u32;
4116	}
4117	else
4118	{
4119	pState = &pVM->tm.s.CpuLoad;
4120	idCpu = VMCPUID_ALL;
4121	}
4122	fAllCpus = false;
4123	break;
4124	case 'p':
4125	cPeriods = RT_MIN(RT_MAX(ValueUnion.u32, 1), RT_ELEMENTS(pState->aHistory));
4126	break;
4127	case 'r':
4128	cRows = RT_MIN(RT_MAX(ValueUnion.u32, 5), RT_ELEMENTS(pState->aHistory));
4129	break;
4130	case 'w':
4131	cchWidth = RT_MIN(RT_MAX(ValueUnion.u32, 10), sizeof(szTmp) - 32);
4132	break;
4133	case 'x':
4134	fExpGraph = true;
4135	break;
4136	case 'u':
4137	fExpGraph = false;
4138	break;
4139	case 'h':
4140	pHlp->pfnPrintf(pHlp,
4141	"Usage: cpuload [parameters]\n"
4142	" all, -a\n"
4143	" Show statistics for all CPUs. (default)\n"
4144	" cpu=id, -c id\n"
4145	" Show statistics for the specified CPU ID. Show combined stats if out of range.\n"
4146	" periods=count, -p count\n"
4147	" Number of periods to show. Default: all\n"
4148	" rows=count, -r count\n"
4149	" Number of rows in the graphs. Default: 60\n"
4150	" width=count, -w count\n"
4151	" Core graph width in characters. Default: 80\n"
4152	" exp, exponential, -e\n"
4153	" Do 1:1 for more recent half / 30 seconds of the graph, combine the\n"
4154	" rest into increasinly larger chunks. Default.\n"
4155	" uniform, uni, -u\n"
4156	" Combine periods into rows in a uniform manner for the whole graph.\n");
4157	return;
4158	default:
4159	pHlp->pfnGetOptError(pHlp, rc, &ValueUnion, &State);
4160	return;
4161	}
4162	}
4163
4164	/*
4165	* Do the job.
4166	*/
4167	for (;;)
4168	{
4169	uint32_t const cMaxPeriods = pState->cHistoryEntries;
4170	if (cPeriods > cMaxPeriods)
4171	cPeriods = cMaxPeriods;
4172	if (cPeriods > 0)
4173	{
4174	if (fAllCpus)
4175	{
4176	if (idCpu > 0)
4177	pHlp->pfnPrintf(pHlp, "\n");
4178	pHlp->pfnPrintf(pHlp, " CPU load for virtual CPU %#04x\n"
4179	" -------------------------------\n", idCpu);
4180	}
4181
4182	/*
4183	* Figure number of periods per chunk. We can either do this in a linear
4184	* fashion or a exponential fashion that compresses old history more.
4185	*/
4186	size_t cPerRowDecrement = 0;
4187	size_t cPeriodsPerRow = 1;
4188	if (cRows < cPeriods)
4189	{
4190	if (!fExpGraph)
4191	cPeriodsPerRow = (cPeriods + cRows / 2) / cRows;
4192	else
4193	{
4194	/* The last 30 seconds or half of the rows are 1:1, the other part
4195	is in increasing period counts. Code is a little simple but seems
4196	to do the job most of the time, which is all I have time now. */
4197	size_t cPeriodsOneToOne = RT_MIN(30, cRows / 2);
4198	size_t cRestRows = cRows - cPeriodsOneToOne;
4199	size_t cRestPeriods = cPeriods - cPeriodsOneToOne;
4200
4201	size_t cPeriodsInWindow = 0;
4202	for (cPeriodsPerRow = 0; cPeriodsPerRow <= cRestRows && cPeriodsInWindow < cRestPeriods; cPeriodsPerRow++)
4203	cPeriodsInWindow += cPeriodsPerRow + 1;
4204
4205	size_t iLower = 1;
4206	while (cPeriodsInWindow < cRestPeriods)
4207	{
4208	cPeriodsPerRow++;
4209	cPeriodsInWindow += cPeriodsPerRow;
4210	cPeriodsInWindow -= iLower;
4211	iLower++;
4212	}
4213
4214	cPerRowDecrement = 1;
4215	}
4216	}
4217
4218	/*
4219	* Do the work.
4220	*/
4221	size_t cPctExecuting = 0;
4222	size_t cPctOther = 0;
4223	size_t cPeriodsAccumulated = 0;
4224
4225	size_t cRowsLeft = cRows;
4226	size_t iHistory = (pState->idxHistory - cPeriods) % RT_ELEMENTS(pState->aHistory);
4227	while (cPeriods-- > 0)
4228	{
4229	iHistory++;
4230	if (iHistory >= RT_ELEMENTS(pState->aHistory))
4231	iHistory = 0;
4232
4233	cPctExecuting += pState->aHistory[iHistory].cPctExecuting;
4234	cPctOther += pState->aHistory[iHistory].cPctOther;
4235	cPeriodsAccumulated += 1;
4236	if ( cPeriodsAccumulated >= cPeriodsPerRow
4237	\|\| cPeriods < cRowsLeft)
4238	{
4239	/*
4240	* Format and output the line.
4241	*/
4242	size_t offTmp = 0;
4243	size_t i = tmR3InfoCpuLoadAdjustWidth(cPctExecuting / cPeriodsAccumulated, cchWidth);
4244	while (i-- > 0)
4245	szTmp[offTmp++] = '#';
4246	i = tmR3InfoCpuLoadAdjustWidth(cPctOther / cPeriodsAccumulated, cchWidth);
4247	while (i-- > 0)
4248	szTmp[offTmp++] = 'O';
4249	szTmp[offTmp] = '\0';
4250
4251	cRowsLeft--;
4252	pHlp->pfnPrintf(pHlp, "%3zus: %s\n", cPeriods + cPeriodsAccumulated / 2, szTmp);
4253
4254	/* Reset the state: */
4255	cPctExecuting = 0;
4256	cPctOther = 0;
4257	cPeriodsAccumulated = 0;
4258	if (cPeriodsPerRow > cPerRowDecrement)
4259	cPeriodsPerRow -= cPerRowDecrement;
4260	}
4261	}
4262	pHlp->pfnPrintf(pHlp, " (#=guest, O=VMM overhead) idCpu=%#x\n", idCpu);
4263
4264	}
4265	else
4266	pHlp->pfnPrintf(pHlp, "No load data.\n");
4267
4268	/*
4269	* Next CPU if we're display all.
4270	*/
4271	if (!fAllCpus)
4272	break;
4273	idCpu++;
4274	if (idCpu >= pVM->cCpus)
4275	break;
4276	pState = &pVM->apCpusR3[idCpu]->tm.s.CpuLoad;
4277	}
4278
4279	}
4280
4281
4282	/**
4283	* Gets the descriptive TM TSC mode name given the enum value.
4284	*
4285	* @returns The name.
4286	* @param enmMode The mode to name.
4287	*/
4288	static const char *tmR3GetTSCModeNameEx(TMTSCMODE enmMode)
4289	{
4290	switch (enmMode)
4291	{
4292	case TMTSCMODE_REAL_TSC_OFFSET: return "RealTSCOffset";
4293	case TMTSCMODE_VIRT_TSC_EMULATED: return "VirtTSCEmulated";
4294	case TMTSCMODE_DYNAMIC: return "Dynamic";
4295	case TMTSCMODE_NATIVE_API: return "NativeApi";
4296	default: return "???";
4297	}
4298	}
4299
4300
4301	/**
4302	* Gets the descriptive TM TSC mode name.
4303	*
4304	* @returns The name.
4305	* @param pVM The cross context VM structure.
4306	*/
4307	static const char *tmR3GetTSCModeName(PVM pVM)
4308	{
4309	Assert(pVM);
4310	return tmR3GetTSCModeNameEx(pVM->tm.s.enmTSCMode);
4311	}
4312

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source: vbox/trunk/src/VBox/VMM/VMMR3/TM.cpp@ 93015

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