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source: vbox/trunk/src/VBox/VMM/TM.cpp@ 1273

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1/* $Id: TM.cpp 1058 2007-02-23 20:56:18Z vboxsync $ */
2/** @file
3 * TM - Timeout Manager.
4 */
5
6/*
7 * Copyright (C) 2006 InnoTek Systemberatung GmbH
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 as published by the Free Software Foundation,
13 * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
14 * distribution. VirtualBox OSE is distributed in the hope that it will
15 * be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * If you received this file as part of a commercial VirtualBox
18 * distribution, then only the terms of your commercial VirtualBox
19 * license agreement apply instead of the previous paragraph.
20 */
21
22
23/** @page pg_tm TM - The Time Manager
24 *
25 * The Time Manager abstracts the CPU clocks and manages timers used by VM device.
26 *
27 *
28 *
29 * @section sec_tm_timers Timers
30 *
31 * The timers supports multiple clocks. Currently there are two clocks in the
32 * TM, the host real time clock and the guest virtual clock. Each clock has it's
33 * own set of scheduling facilities which are identical but for the clock source.
34 *
35 * Take one such timer scheduling facility, or timer queue if you like. There are
36 * a few factors which makes it a bit complex. First there is the usual GC vs. HC
37 * thing. Then there is multiple threads, and then there is the fact that on Unix
38 * we might just as well take a timer signal which checks whether it's wise to
39 * schedule timers while we're scheduling them. On API level, all but the create
40 * and save APIs must be mulithreaded.
41 *
42 * The design is using a doubly linked HC list of active timers which is ordered
43 * by expire date. Updates to the list is batched in a singly linked list (linked
44 * by handle not pointer for atomically update support in both GC and HC) and
45 * will be processed by the emulation thread.
46 *
47 * For figuring out when there is need to schedule timers a high frequency
48 * asynchronous timer is employed using Host OS services. Its task is to check if
49 * there are anything batched up or if a head has expired. If this is the case
50 * a forced action is signals and the emulation thread will process this ASAP.
51 *
52 */
53
54
55
56
57/*******************************************************************************
58* Header Files *
59*******************************************************************************/
60#define LOG_GROUP LOG_GROUP_TM
61#include <VBox/tm.h>
62#include <VBox/vmm.h>
63#include <VBox/mm.h>
64#include <VBox/ssm.h>
65#include <VBox/dbgf.h>
66#include <VBox/rem.h>
67#include "TMInternal.h"
68#include <VBox/vm.h>
69
70#include <VBox/param.h>
71#include <VBox/err.h>
72
73#include <VBox/log.h>
74#include <iprt/asm.h>
75#include <iprt/assert.h>
76#include <iprt/thread.h>
77#include <iprt/time.h>
78#include <iprt/timer.h>
79#include <iprt/semaphore.h>
80#include <iprt/string.h>
81
82/*******************************************************************************
83* Defined Constants And Macros *
84*******************************************************************************/
85/** The current saved state version.*/
86#define TM_SAVED_STATE_VERSION 2
87
88
89/*******************************************************************************
90* Internal Functions *
91*******************************************************************************/
92static uint64_t tmR3Calibrate(void);
93static DECLCALLBACK(int) tmR3Save(PVM pVM, PSSMHANDLE pSSM);
94static DECLCALLBACK(int) tmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version);
95static DECLCALLBACK(void) tmR3TimerCallback(PRTTIMER pTimer, void *pvUser);
96static void tmR3TimerQueueRun(PVM pVM, PTMTIMERQUEUE pQueue);
97static DECLCALLBACK(void) tmR3TimerInfo(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
98static DECLCALLBACK(void) tmR3TimerInfoActive(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
99static DECLCALLBACK(void) tmR3InfoClocks(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
100
101
102/**
103 * Internal function for getting the clock time.
104 *
105 * @returns clock time.
106 * @param pVM The VM handle.
107 * @param enmClock The clock.
108 */
109DECLINLINE(uint64_t) tmClock(PVM pVM, TMCLOCK enmClock)
110{
111 switch (enmClock)
112 {
113 case TMCLOCK_VIRTUAL: return TMVirtualGet(pVM);
114 case TMCLOCK_VIRTUAL_SYNC: return TMVirtualGetSync(pVM);
115 case TMCLOCK_REAL: return TMRealGet(pVM);
116 case TMCLOCK_TSC: return TMCpuTickGet(pVM);
117 default:
118 AssertMsgFailed(("enmClock=%d\n", enmClock));
119 return ~(uint64_t)0;
120 }
121}
122
123
124/**
125 * Initializes the TM.
126 *
127 * @returns VBox status code.
128 * @param pVM The VM to operate on.
129 */
130TMR3DECL(int) TMR3Init(PVM pVM)
131{
132 LogFlow(("TMR3Init:\n"));
133
134 /*
135 * Assert alignment and sizes.
136 */
137 AssertRelease(!(RT_OFFSETOF(VM, tm.s) & 31));
138 AssertRelease(sizeof(pVM->tm.s) <= sizeof(pVM->tm.padding));
139
140 /*
141 * Init the structure.
142 */
143 void *pv;
144 int rc = MMHyperAlloc(pVM, sizeof(pVM->tm.s.paTimerQueuesR3[0]) * TMCLOCK_MAX, 0, MM_TAG_TM, &pv);
145 AssertRCReturn(rc, rc);
146 pVM->tm.s.paTimerQueuesR3 = (PTMTIMERQUEUE)pv;
147
148 pVM->tm.s.offVM = RT_OFFSETOF(VM, tm.s);
149 pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL].enmClock = TMCLOCK_VIRTUAL;
150 pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL].u64Expire = INT64_MAX;
151 pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL_SYNC].enmClock = TMCLOCK_VIRTUAL_SYNC;
152 pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL_SYNC].u64Expire = INT64_MAX;
153 pVM->tm.s.paTimerQueuesR3[TMCLOCK_REAL].enmClock = TMCLOCK_REAL;
154 pVM->tm.s.paTimerQueuesR3[TMCLOCK_REAL].u64Expire = INT64_MAX;
155 pVM->tm.s.paTimerQueuesR3[TMCLOCK_TSC].enmClock = TMCLOCK_TSC;
156 pVM->tm.s.paTimerQueuesR3[TMCLOCK_TSC].u64Expire = INT64_MAX;
157
158 /*
159 * We indirectly - thru RTTimeNanoTS and RTTimeMilliTS - use the global
160 * info page (GIP) for both the virtual and the real clock. By mapping
161 * the GIP into guest context we can get just as accurate time even there.
162 * All that's required is that the g_pSUPGlobalInfoPage symbol is available
163 * to the GC Runtime.
164 */
165 pVM->tm.s.pvGIPR3 = (void *)g_pSUPGlobalInfoPage;
166 AssertMsgReturn(pVM->tm.s.pvGIPR3, ("GIP support is now required!\n"), VERR_INTERNAL_ERROR);
167 RTHCPHYS HCPhysGIP;
168 rc = SUPGipGetPhys(&HCPhysGIP);
169 AssertMsgRCReturn(rc, ("Failed to get GIP physical address!\n"), rc);
170
171 rc = MMR3HyperMapHCPhys(pVM, pVM->tm.s.pvGIPR3, HCPhysGIP, PAGE_SIZE, "GIP", &pVM->tm.s.pvGIPGC);
172 if (VBOX_FAILURE(rc))
173 {
174 AssertMsgFailed(("Failed to map GIP into GC, rc=%Vrc!\n", rc));
175 return rc;
176 }
177 LogFlow(("TMR3Init: HCPhysGIP=%RHp at %VGv\n", HCPhysGIP, pVM->tm.s.pvGIPGC));
178 MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
179
180 /*
181 * Determin the TSC configuration and frequency.
182 */
183 /* mode */
184 rc = CFGMR3QueryBool(CFGMR3GetRoot(pVM), "TSCVirtualized", &pVM->tm.s.fTSCVirtualized);
185 if (rc == VERR_CFGM_VALUE_NOT_FOUND)
186#if 0 /* seems to kind of work... */
187 pVM->tm.s.fTSCVirtualized = true;
188#else
189 pVM->tm.s.fTSCVirtualized = false;
190#endif
191 else if (VBOX_FAILURE(rc))
192 return VMSetError(pVM, rc, RT_SRC_POS,
193 N_("Configuration error: Failed to querying bool value \"UseRealTSC\". (%Vrc)"), rc);
194
195 /* source */
196 rc = CFGMR3QueryBool(CFGMR3GetRoot(pVM), "UseRealTSC", &pVM->tm.s.fTSCTicking);
197 if (rc == VERR_CFGM_VALUE_NOT_FOUND)
198#if 0 /* doesn't seem to work reliably yet... xp takes several ~2 min to shutdown now. darn. */
199 pVM->tm.s.fTSCUseRealTSC = false; /* virtualize it */
200#else
201 pVM->tm.s.fTSCUseRealTSC = true; /* don't virtualize it */
202#endif
203 else if (VBOX_FAILURE(rc))
204 return VMSetError(pVM, rc, RT_SRC_POS,
205 N_("Configuration error: Failed to querying bool value \"UseRealTSC\". (%Vrc)"), rc);
206 if (!pVM->tm.s.fTSCUseRealTSC)
207 pVM->tm.s.fTSCVirtualized = true;
208
209 /* frequency */
210 rc = CFGMR3QueryU64(CFGMR3GetRoot(pVM), "TSCTicksPerSecond", &pVM->tm.s.cTSCTicksPerSecond);
211 if (rc == VERR_CFGM_VALUE_NOT_FOUND)
212 {
213#if 0 /* when tmCpuTickGetRawVirtual is done */
214 pVM->tm.s.cTSCTicksPerSecond = tmR3Calibrate();
215#else
216 if (pVM->tm.s.fTSCUseRealTSC)
217 pVM->tm.s.cTSCTicksPerSecond = tmR3Calibrate();
218 else
219 pVM->tm.s.cTSCTicksPerSecond = TMCLOCK_FREQ_VIRTUAL;/* same as the virtual clock. */
220#endif
221 }
222 else if (VBOX_FAILURE(rc))
223 return VMSetError(pVM, rc, RT_SRC_POS,
224 N_("Configuration error: Failed to querying uint64_t value \"TSCTicksPerSecond\". (%Vrc)"), rc);
225#if 0 /* when tmCpuTickGetRawVirtual is done */
226 else if ( pVM->tm.s.cTSCTicksPerSecond < _1M
227 || pVM->tm.s.cTSCTicksPerSecond > _1E)
228 return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS,
229 N_("Configuration error: \"TSCTicksPerSecond\" = %RI64 is not in the range 1MHz..1EHz!"),
230 pVM->tm.s.cTSCTicksPerSecond);
231#else
232 else if (pVM->tm.s.cTSCTicksPerSecond != TMCLOCK_FREQ_VIRTUAL)
233 return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS,
234 N_("Configuration error: \"TSCTicksPerSecond\" = %RI64 is not 1GHz! (temporary restriction)"),
235 pVM->tm.s.cTSCTicksPerSecond);
236#endif
237 else
238 {
239 pVM->tm.s.fTSCUseRealTSC = false;
240 pVM->tm.s.fTSCVirtualized = true;
241 }
242
243 /* setup and report */
244 if (pVM->tm.s.fTSCUseRealTSC)
245 CPUMR3SetCR4Feature(pVM, 0, ~X86_CR4_TSD);
246 else
247 CPUMR3SetCR4Feature(pVM, X86_CR4_TSD, ~X86_CR4_TSD);
248 LogRel(("TM: cTSCTicksPerSecond=%#RX64 (%RU64) fTSCVirtualized=%RTbool fTSCUseRealTSC=%RTbool\n",
249 pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.fTSCVirtualized, pVM->tm.s.fTSCUseRealTSC));
250
251 /*
252 * Register saved state.
253 */
254 rc = SSMR3RegisterInternal(pVM, "tm", 1, TM_SAVED_STATE_VERSION, sizeof(uint64_t) * 8,
255 NULL, tmR3Save, NULL,
256 NULL, tmR3Load, NULL);
257 if (VBOX_FAILURE(rc))
258 return rc;
259
260 /*
261 * Setup the warp drive.
262 */
263 rc = CFGMR3QueryU32(CFGMR3GetRoot(pVM), "WarpDrivePercentage", &pVM->tm.s.u32VirtualWarpDrivePercentage);
264 if (rc == VERR_CFGM_VALUE_NOT_FOUND)
265 pVM->tm.s.u32VirtualWarpDrivePercentage = 100;
266 else if (VBOX_FAILURE(rc))
267 return VMSetError(pVM, rc, RT_SRC_POS,
268 N_("Configuration error: Failed to querying uint32_t value \"WarpDrivePercent\". (%Vrc)"), rc);
269 else if ( pVM->tm.s.u32VirtualWarpDrivePercentage < 2
270 || pVM->tm.s.u32VirtualWarpDrivePercentage > 20000)
271 return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS,
272 N_("Configuration error: \"WarpDrivePercent\" = %RI32 is not in the range 2..20000!"),
273 pVM->tm.s.u32VirtualWarpDrivePercentage);
274 pVM->tm.s.fVirtualWarpDrive = pVM->tm.s.u32VirtualWarpDrivePercentage != 100;
275 if (pVM->tm.s.fVirtualWarpDrive)
276 LogRel(("TM: u32VirtualWarpDrivePercentage=%RI32\n", pVM->tm.s.u32VirtualWarpDrivePercentage));
277
278 /*
279 * Start the timer (guard against REM not yielding).
280 */
281 uint32_t u32Millies;
282 rc = CFGMR3QueryU32(CFGMR3GetRoot(pVM), "TimerMillies", &u32Millies);
283 if (rc == VERR_CFGM_VALUE_NOT_FOUND)
284 u32Millies = 10;
285 else if (VBOX_FAILURE(rc))
286 return VMSetError(pVM, rc, RT_SRC_POS,
287 N_("Configuration error: Failed to query uint32_t value \"TimerMillies\", rc=%Vrc.\n"), rc);
288 rc = RTTimerCreate(&pVM->tm.s.pTimer, u32Millies, tmR3TimerCallback, pVM);
289 if (VBOX_FAILURE(rc))
290 {
291 AssertMsgFailed(("Failed to create timer, u32Millies=%d rc=%Vrc.\n", u32Millies, rc));
292 return rc;
293 }
294 Log(("TM: Created timer %p firing every %d millieseconds\n", pVM->tm.s.pTimer, u32Millies));
295 pVM->tm.s.u32TimerMillies = u32Millies;
296
297#ifdef VBOX_WITH_STATISTICS
298 /*
299 * Register statistics.
300 */
301 STAM_REG(pVM, &pVM->tm.s.StatDoQueues, STAMTYPE_PROFILE, "/TM/DoQueues", STAMUNIT_TICKS_PER_CALL, "Profiling timer TMR3TimerQueuesDo.");
302 STAM_REG(pVM, &pVM->tm.s.StatDoQueuesSchedule, STAMTYPE_PROFILE_ADV, "/TM/DoQueues/Schedule",STAMUNIT_TICKS_PER_CALL, "The scheduling part.");
303 STAM_REG(pVM, &pVM->tm.s.StatDoQueuesRun, STAMTYPE_PROFILE_ADV, "/TM/DoQueues/Run", STAMUNIT_TICKS_PER_CALL, "The run part.");
304
305 STAM_REG(pVM, &pVM->tm.s.StatPollAlreadySet, STAMTYPE_COUNTER, "/TM/PollAlreadySet", STAMUNIT_OCCURENCES, "TMTimerPoll calls where the FF was already set.");
306 STAM_REG(pVM, &pVM->tm.s.StatPollVirtual, STAMTYPE_COUNTER, "/TM/PollHitsVirtual", STAMUNIT_OCCURENCES, "The number of times TMTimerPoll found an expired TMCLOCK_VIRTUAL queue.");
307 STAM_REG(pVM, &pVM->tm.s.StatPollVirtualSync, STAMTYPE_COUNTER, "/TM/PollHitsVirtualSync",STAMUNIT_OCCURENCES, "The number of times TMTimerPoll found an expired TMCLOCK_VIRTUAL_SYNC queue.");
308 STAM_REG(pVM, &pVM->tm.s.StatPollMiss, STAMTYPE_COUNTER, "/TM/PollMiss", STAMUNIT_OCCURENCES, "TMTimerPoll calls where nothing had expired.");
309
310 STAM_REG(pVM, &pVM->tm.s.StatPostponedR3, STAMTYPE_COUNTER, "/TM/PostponedR3", STAMUNIT_OCCURENCES, "Postponed due to unschedulable state, in ring-3.");
311 STAM_REG(pVM, &pVM->tm.s.StatPostponedR0, STAMTYPE_COUNTER, "/TM/PostponedR0", STAMUNIT_OCCURENCES, "Postponed due to unschedulable state, in ring-0.");
312 STAM_REG(pVM, &pVM->tm.s.StatPostponedGC, STAMTYPE_COUNTER, "/TM/PostponedGC", STAMUNIT_OCCURENCES, "Postponed due to unschedulable state, in GC.");
313
314 STAM_REG(pVM, &pVM->tm.s.StatScheduleOneGC, STAMTYPE_PROFILE, "/TM/ScheduleOneGC", STAMUNIT_TICKS_PER_CALL, "Profiling the scheduling of one queue during a TMTimer* call in EMT.\n");
315 STAM_REG(pVM, &pVM->tm.s.StatScheduleOneR0, STAMTYPE_PROFILE, "/TM/ScheduleOneR0", STAMUNIT_TICKS_PER_CALL, "Profiling the scheduling of one queue during a TMTimer* call in EMT.\n");
316 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.\n");
317 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.");
318
319 STAM_REG(pVM, &pVM->tm.s.StatTimerSetGC, STAMTYPE_PROFILE, "/TM/TimerSetGC", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerSet calls made in GC.");
320 STAM_REG(pVM, &pVM->tm.s.StatTimerSetR0, STAMTYPE_PROFILE, "/TM/TimerSetR0", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerSet calls made in ring-0.");
321 STAM_REG(pVM, &pVM->tm.s.StatTimerSetR3, STAMTYPE_PROFILE, "/TM/TimerSetR3", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerSet calls made in ring-3.");
322
323 STAM_REG(pVM, &pVM->tm.s.StatTimerStopGC, STAMTYPE_PROFILE, "/TM/TimerStopGC", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerStop calls made in GC.");
324 STAM_REG(pVM, &pVM->tm.s.StatTimerStopR0, STAMTYPE_PROFILE, "/TM/TimerStopR0", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerStop calls made in ring-0.");
325 STAM_REG(pVM, &pVM->tm.s.StatTimerStopR3, STAMTYPE_PROFILE, "/TM/TimerStopR3", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerStop calls made in ring-3.");
326
327 STAM_REG(pVM, &pVM->tm.s.StatVirtualGet, STAMTYPE_COUNTER, "/TM/VirtualGet", STAMUNIT_OCCURENCES, "The number of times TMR3TimerGet was called when the clock was running.");
328 STAM_REG(pVM, &pVM->tm.s.StatVirtualGetSync, STAMTYPE_COUNTER, "/TM/VirtualGetSync", STAMUNIT_OCCURENCES, "The number of times TMR3TimerGetSync was called when the clock was running.");
329 STAM_REG(pVM, &pVM->tm.s.StatVirtualPause, STAMTYPE_COUNTER, "/TM/VirtualPause", STAMUNIT_OCCURENCES, "The number of times TMR3TimerPause was called.");
330 STAM_REG(pVM, &pVM->tm.s.StatVirtualResume, STAMTYPE_COUNTER, "/TM/VirtualResume", STAMUNIT_OCCURENCES, "The number of times TMR3TimerResume was called.");
331
332 STAM_REG(pVM, &pVM->tm.s.StatTimerCallbackSetFF,STAMTYPE_COUNTER, "/TM/CallbackSetFF", STAMUNIT_OCCURENCES, "The number of times the timer callback set FF.");
333#endif /* VBOX_WITH_STATISTICS */
334
335 /*
336 * Register info handlers.
337 */
338 DBGFR3InfoRegisterInternal(pVM, "timers", "Dumps all timers. No arguments.", tmR3TimerInfo);
339 DBGFR3InfoRegisterInternal(pVM, "activetimers", "Dumps active all timers. No arguments.", tmR3TimerInfoActive);
340 DBGFR3InfoRegisterInternal(pVM, "clocks", "Display the time of the various clocks.", tmR3InfoClocks);
341
342 return VINF_SUCCESS;
343}
344
345
346/**
347 * Calibrate the CPU tick.
348 *
349 * @returns Number of ticks per second.
350 */
351static uint64_t tmR3Calibrate(void)
352{
353 /*
354 * Use GIP when available present.
355 */
356 uint64_t u64Hz;
357 PCSUPGLOBALINFOPAGE pGip = g_pSUPGlobalInfoPage;
358 if ( pGip
359 && pGip->u32Magic == SUPGLOBALINFOPAGE_MAGIC)
360 {
361 unsigned iCpu = pGip->u32Mode != SUPGIPMODE_ASYNC_TSC ? 0 : ASMGetApicId();
362 if (iCpu >= RT_ELEMENTS(pGip->aCPUs))
363 AssertReleaseMsgFailed(("iCpu=%d - the ApicId is too high. send VBox.log and hardware specs!\n", iCpu));
364 else
365 {
366 RTThreadSleep(32); /* To preserve old behaviour and to get a good CpuHz at startup. */
367 pGip = g_pSUPGlobalInfoPage;
368 if ( pGip
369 && pGip->u32Magic == SUPGLOBALINFOPAGE_MAGIC
370 && (u64Hz = pGip->aCPUs[iCpu].u64CpuHz)
371 && u64Hz != ~(uint64_t)0)
372 return u64Hz;
373 }
374 }
375
376 /* call this once first to make sure it's initialized. */
377 RTTimeNanoTS();
378
379 /*
380 * Yield the CPU to increase our chances of getting
381 * a correct value.
382 */
383 RTThreadYield(); /* Try avoid interruptions between TSC and NanoTS samplings. */
384 static const unsigned s_auSleep[5] = { 50, 30, 30, 40, 40 };
385 uint64_t au64Samples[5];
386 unsigned i;
387 for (i = 0; i < ELEMENTS(au64Samples); i++)
388 {
389 unsigned cMillies;
390 int cTries = 5;
391 uint64_t u64Start = ASMReadTSC();
392 uint64_t u64End;
393 uint64_t StartTS = RTTimeNanoTS();
394 uint64_t EndTS;
395 do
396 {
397 RTThreadSleep(s_auSleep[i]);
398 u64End = ASMReadTSC();
399 EndTS = RTTimeNanoTS();
400 cMillies = (unsigned)((EndTS - StartTS + 500000) / 1000000);
401 } while ( cMillies == 0 /* the sleep may be interrupted... */
402 || (cMillies < 20 && --cTries > 0));
403 uint64_t u64Diff = u64End - u64Start;
404
405 au64Samples[i] = (u64Diff * 1000) / cMillies;
406 AssertMsg(cTries > 0, ("cMillies=%d i=%d\n", cMillies, i));
407 }
408
409 /*
410 * Discard the highest and lowest results and calculate the average.
411 */
412 unsigned iHigh = 0;
413 unsigned iLow = 0;
414 for (i = 1; i < ELEMENTS(au64Samples); i++)
415 {
416 if (au64Samples[i] < au64Samples[iLow])
417 iLow = i;
418 if (au64Samples[i] > au64Samples[iHigh])
419 iHigh = i;
420 }
421 au64Samples[iLow] = 0;
422 au64Samples[iHigh] = 0;
423
424 u64Hz = au64Samples[0];
425 for (i = 1; i < ELEMENTS(au64Samples); i++)
426 u64Hz += au64Samples[i];
427 u64Hz /= ELEMENTS(au64Samples) - 2;
428
429 return u64Hz;
430}
431
432
433/**
434 * Applies relocations to data and code managed by this
435 * component. This function will be called at init and
436 * whenever the VMM need to relocate it self inside the GC.
437 *
438 * @param pVM The VM.
439 * @param offDelta Relocation delta relative to old location.
440 */
441TMR3DECL(void) TMR3Relocate(PVM pVM, RTGCINTPTR offDelta)
442{
443 LogFlow(("TMR3Relocate\n"));
444 pVM->tm.s.pvGIPGC = MMHyperR3ToGC(pVM, pVM->tm.s.pvGIPR3);
445 pVM->tm.s.paTimerQueuesGC = MMHyperR3ToGC(pVM, pVM->tm.s.paTimerQueuesR3);
446 pVM->tm.s.paTimerQueuesR0 = MMHyperR3ToR0(pVM, pVM->tm.s.paTimerQueuesR3);
447
448 /*
449 * Iterate the timers updating the pVMGC pointers.
450 */
451 for (PTMTIMER pTimer = pVM->tm.s.pCreated; pTimer; pTimer = pTimer->pBigNext)
452 {
453 pTimer->pVMGC = pVM->pVMGC;
454 pTimer->pVMR0 = (PVMR0)pVM->pVMHC; /// @todo pTimer->pVMR0 = pVM->pVMR0;
455 }
456}
457
458
459/**
460 * Terminates the TM.
461 *
462 * Termination means cleaning up and freeing all resources,
463 * the VM it self is at this point powered off or suspended.
464 *
465 * @returns VBox status code.
466 * @param pVM The VM to operate on.
467 */
468TMR3DECL(int) TMR3Term(PVM pVM)
469{
470 AssertMsg(pVM->tm.s.offVM, ("bad init order!\n"));
471 if (pVM->tm.s.pTimer)
472 {
473 int rc = RTTimerDestroy(pVM->tm.s.pTimer);
474 AssertRC(rc);
475 pVM->tm.s.pTimer = NULL;
476 }
477
478 return VINF_SUCCESS;
479}
480
481
482/**
483 * The VM is being reset.
484 *
485 * For the TM component this means that a rescheduling is preformed,
486 * the FF is cleared and but without running the queues. We'll have to
487 * check if this makes sense or not, but it seems like a good idea now....
488 *
489 * @param pVM VM handle.
490 */
491TMR3DECL(void) TMR3Reset(PVM pVM)
492{
493 LogFlow(("TMR3Reset:\n"));
494 VM_ASSERT_EMT(pVM);
495
496 /*
497 * Process the queues.
498 */
499 for (int i = 0; i < TMCLOCK_MAX; i++)
500 tmTimerQueueSchedule(pVM, &pVM->tm.s.paTimerQueuesR3[i]);
501#ifdef VBOX_STRICT
502 tmTimerQueuesSanityChecks(pVM, "TMR3Reset");
503#endif
504 VM_FF_CLEAR(pVM, VM_FF_TIMER);
505}
506
507
508/**
509 * Resolve a builtin GC symbol.
510 * Called by PDM when loading or relocating GC modules.
511 *
512 * @returns VBox status
513 * @param pVM VM Handle.
514 * @param pszSymbol Symbol to resolv
515 * @param pGCPtrValue Where to store the symbol value.
516 * @remark This has to work before TMR3Relocate() is called.
517 */
518TMR3DECL(int) TMR3GetImportGC(PVM pVM, const char *pszSymbol, PRTGCPTR pGCPtrValue)
519{
520 if (!strcmp(pszSymbol, "g_pSUPGlobalInfoPage"))
521 *pGCPtrValue = MMHyperHC2GC(pVM, &pVM->tm.s.pvGIPGC);
522 //else if (..)
523 else
524 return VERR_SYMBOL_NOT_FOUND;
525 return VINF_SUCCESS;
526}
527
528
529/**
530 * Execute state save operation.
531 *
532 * @returns VBox status code.
533 * @param pVM VM Handle.
534 * @param pSSM SSM operation handle.
535 */
536static DECLCALLBACK(int) tmR3Save(PVM pVM, PSSMHANDLE pSSM)
537{
538 LogFlow(("tmR3Save:\n"));
539 Assert(!pVM->tm.s.fTSCTicking);
540 Assert(!pVM->tm.s.fVirtualTicking);
541 Assert(!pVM->tm.s.fVirtualSyncTicking);
542
543 /*
544 * Save the virtual clocks.
545 */
546 /* the virtual clock. */
547 SSMR3PutU64(pSSM, TMCLOCK_FREQ_VIRTUAL);
548 SSMR3PutU64(pSSM, pVM->tm.s.u64Virtual);
549
550 /* the virtual timer synchronous clock. */
551 SSMR3PutU64(pSSM, pVM->tm.s.u64VirtualSync);
552 SSMR3PutU64(pSSM, pVM->tm.s.u64VirtualSyncOffset);
553 SSMR3PutU64(pSSM, pVM->tm.s.u64VirtualSyncCatchUpPrev);
554 SSMR3PutBool(pSSM, pVM->tm.s.fVirtualSyncCatchUp);
555
556 /* real time clock */
557 SSMR3PutU64(pSSM, TMCLOCK_FREQ_REAL);
558
559 /* the cpu tick clock. */
560 SSMR3PutU64(pSSM, TMCpuTickGet(pVM));
561 return SSMR3PutU64(pSSM, pVM->tm.s.cTSCTicksPerSecond);
562}
563
564
565/**
566 * Execute state load operation.
567 *
568 * @returns VBox status code.
569 * @param pVM VM Handle.
570 * @param pSSM SSM operation handle.
571 * @param u32Version Data layout version.
572 */
573static DECLCALLBACK(int) tmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version)
574{
575 LogFlow(("tmR3Load:\n"));
576 Assert(!pVM->tm.s.fTSCTicking);
577 Assert(!pVM->tm.s.fVirtualTicking);
578 Assert(!pVM->tm.s.fVirtualSyncTicking);
579
580 /*
581 * Validate version.
582 */
583 if (u32Version != TM_SAVED_STATE_VERSION)
584 {
585 Log(("tmR3Load: Invalid version u32Version=%d!\n", u32Version));
586 return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
587 }
588
589 /*
590 * Load the virtual clock.
591 */
592 pVM->tm.s.fVirtualTicking = false;
593 /* the virtual clock. */
594 uint64_t u64Hz;
595 int rc = SSMR3GetU64(pSSM, &u64Hz);
596 if (VBOX_FAILURE(rc))
597 return rc;
598 if (u64Hz != TMCLOCK_FREQ_VIRTUAL)
599 {
600 AssertMsgFailed(("The virtual clock frequency differs! Saved: %RU64 Binary: %RU64\n",
601 u64Hz, TMCLOCK_FREQ_VIRTUAL));
602 return VERR_SSM_VIRTUAL_CLOCK_HZ;
603 }
604 SSMR3GetU64(pSSM, &pVM->tm.s.u64Virtual);
605 pVM->tm.s.u64VirtualOffset = 0;
606
607 /* the virtual timer synchronous clock. */
608 pVM->tm.s.fVirtualSyncTicking = false;
609 SSMR3GetU64(pSSM, &pVM->tm.s.u64VirtualSync);
610 uint64_t u64;
611 SSMR3GetU64(pSSM, &u64);
612 pVM->tm.s.u64VirtualSyncOffset = u64;
613 SSMR3GetU64(pSSM, &u64);
614 pVM->tm.s.u64VirtualSyncCatchUpPrev = u64;
615 bool f;
616 SSMR3GetBool(pSSM, &f);
617 pVM->tm.s.fVirtualSyncCatchUp = f;
618
619 /* the real clock */
620 rc = SSMR3GetU64(pSSM, &u64Hz);
621 if (VBOX_FAILURE(rc))
622 return rc;
623 if (u64Hz != TMCLOCK_FREQ_REAL)
624 {
625 AssertMsgFailed(("The real clock frequency differs! Saved: %RU64 Binary: %RU64\n",
626 u64Hz, TMCLOCK_FREQ_REAL));
627 return VERR_SSM_VIRTUAL_CLOCK_HZ; /* missleading... */
628 }
629
630 /* the cpu tick clock. */
631 pVM->tm.s.fTSCTicking = false;
632 rc = SSMR3GetU64(pSSM, &u64Hz);
633 if (VBOX_FAILURE(rc))
634 return rc;
635 SSMR3GetU64(pSSM, &pVM->tm.s.u64TSC);
636 /** @todo check TSC frequency and virtualize the TSC properly! */
637 pVM->tm.s.u64TSCOffset = 0;
638
639 /*
640 * Make sure timers get rescheduled immediately.
641 */
642 VM_FF_SET(pVM, VM_FF_TIMER);
643
644 return VINF_SUCCESS;
645}
646
647
648/** @todo doc */
649static int tmr3TimerCreate(PVM pVM, TMCLOCK enmClock, const char *pszDesc, PPTMTIMERHC ppTimer)
650{
651 VM_ASSERT_EMT(pVM);
652
653 /*
654 * Allocate the timer.
655 */
656 PTMTIMERHC pTimer = NULL;
657 if (pVM->tm.s.pFree && VM_IS_EMT(pVM))
658 {
659 pTimer = pVM->tm.s.pFree;
660 pVM->tm.s.pFree = pTimer->pBigNext;
661 Log3(("TM: Recycling timer %p, new free head %p.\n", pTimer, pTimer->pBigNext));
662 }
663
664 if (!pTimer)
665 {
666 int rc = MMHyperAlloc(pVM, sizeof(*pTimer), 0, MM_TAG_TM, (void **)&pTimer);
667 if (VBOX_FAILURE(rc))
668 return rc;
669 Log3(("TM: Allocated new timer %p\n", pTimer));
670 }
671
672 /*
673 * Initialize it.
674 */
675 pTimer->u64Expire = 0;
676 pTimer->enmClock = enmClock;
677 pTimer->pVMR3 = pVM;
678 pTimer->pVMR0 = (PVMR0)pVM->pVMHC; /// @todo pTimer->pVMR0 = pVM->pVMR0;
679 pTimer->pVMGC = pVM->pVMGC;
680 pTimer->enmState = TMTIMERSTATE_STOPPED;
681 pTimer->offScheduleNext = 0;
682 pTimer->offNext = 0;
683 pTimer->offPrev = 0;
684 pTimer->pszDesc = pszDesc;
685
686 /* insert into the list of created timers. */
687 pTimer->pBigPrev = NULL;
688 pTimer->pBigNext = pVM->tm.s.pCreated;
689 pVM->tm.s.pCreated = pTimer;
690 if (pTimer->pBigNext)
691 pTimer->pBigNext->pBigPrev = pTimer;
692#ifdef VBOX_STRICT
693 tmTimerQueuesSanityChecks(pVM, "tmR3TimerCreate");
694#endif
695
696 *ppTimer = pTimer;
697 return VINF_SUCCESS;
698}
699
700
701/**
702 * Creates a device timer.
703 *
704 * @returns VBox status.
705 * @param pVM The VM to create the timer in.
706 * @param pDevIns Device instance.
707 * @param enmClock The clock to use on this timer.
708 * @param pfnCallback Callback function.
709 * @param pszDesc Pointer to description string which must stay around
710 * until the timer is fully destroyed (i.e. a bit after TMTimerDestroy()).
711 * @param ppTimer Where to store the timer on success.
712 */
713TMR3DECL(int) TMR3TimerCreateDevice(PVM pVM, PPDMDEVINS pDevIns, TMCLOCK enmClock, PFNTMTIMERDEV pfnCallback, const char *pszDesc, PPTMTIMERHC ppTimer)
714{
715 /*
716 * Allocate and init stuff.
717 */
718 int rc = tmr3TimerCreate(pVM, enmClock, pszDesc, ppTimer);
719 if (VBOX_SUCCESS(rc))
720 {
721 (*ppTimer)->enmType = TMTIMERTYPE_DEV;
722 (*ppTimer)->u.Dev.pfnTimer = pfnCallback;
723 (*ppTimer)->u.Dev.pDevIns = pDevIns;
724 Log(("TM: Created device timer %p clock %d callback %p '%s'\n", (*ppTimer), enmClock, pfnCallback, pszDesc));
725 }
726
727 return rc;
728}
729
730
731/**
732 * Creates a driver timer.
733 *
734 * @returns VBox status.
735 * @param pVM The VM to create the timer in.
736 * @param pDrvIns Driver instance.
737 * @param enmClock The clock to use on this timer.
738 * @param pfnCallback Callback function.
739 * @param pszDesc Pointer to description string which must stay around
740 * until the timer is fully destroyed (i.e. a bit after TMTimerDestroy()).
741 * @param ppTimer Where to store the timer on success.
742 */
743TMR3DECL(int) TMR3TimerCreateDriver(PVM pVM, PPDMDRVINS pDrvIns, TMCLOCK enmClock, PFNTMTIMERDRV pfnCallback, const char *pszDesc, PPTMTIMERHC ppTimer)
744{
745 /*
746 * Allocate and init stuff.
747 */
748 int rc = tmr3TimerCreate(pVM, enmClock, pszDesc, ppTimer);
749 if (VBOX_SUCCESS(rc))
750 {
751 (*ppTimer)->enmType = TMTIMERTYPE_DRV;
752 (*ppTimer)->u.Drv.pfnTimer = pfnCallback;
753 (*ppTimer)->u.Drv.pDrvIns = pDrvIns;
754 Log(("TM: Created device timer %p clock %d callback %p '%s'\n", (*ppTimer), enmClock, pfnCallback, pszDesc));
755 }
756
757 return rc;
758}
759
760
761/**
762 * Creates an internal timer.
763 *
764 * @returns VBox status.
765 * @param pVM The VM to create the timer in.
766 * @param enmClock The clock to use on this timer.
767 * @param pfnCallback Callback function.
768 * @param pvUser User argument to be passed to the callback.
769 * @param pszDesc Pointer to description string which must stay around
770 * until the timer is fully destroyed (i.e. a bit after TMTimerDestroy()).
771 * @param ppTimer Where to store the timer on success.
772 */
773TMR3DECL(int) TMR3TimerCreateInternal(PVM pVM, TMCLOCK enmClock, PFNTMTIMERINT pfnCallback, void *pvUser, const char *pszDesc, PPTMTIMERHC ppTimer)
774{
775 /*
776 * Allocate and init stuff.
777 */
778 PTMTIMER pTimer;
779 int rc = tmr3TimerCreate(pVM, enmClock, pszDesc, &pTimer);
780 if (VBOX_SUCCESS(rc))
781 {
782 pTimer->enmType = TMTIMERTYPE_INTERNAL;
783 pTimer->u.Internal.pfnTimer = pfnCallback;
784 pTimer->u.Internal.pvUser = pvUser;
785 *ppTimer = pTimer;
786 Log(("TM: Created internal timer %p clock %d callback %p '%s'\n", pTimer, enmClock, pfnCallback, pszDesc));
787 }
788
789 return rc;
790}
791
792/**
793 * Creates an external timer.
794 *
795 * @returns Timer handle on success.
796 * @returns NULL on failure.
797 * @param pVM The VM to create the timer in.
798 * @param enmClock The clock to use on this timer.
799 * @param pfnCallback Callback function.
800 * @param pvUser User argument.
801 * @param pszDesc Pointer to description string which must stay around
802 * until the timer is fully destroyed (i.e. a bit after TMTimerDestroy()).
803 */
804TMR3DECL(PTMTIMERHC) TMR3TimerCreateExternal(PVM pVM, TMCLOCK enmClock, PFNTMTIMEREXT pfnCallback, void *pvUser, const char *pszDesc)
805{
806 /*
807 * Allocate and init stuff.
808 */
809 PTMTIMERHC pTimer;
810 int rc = tmr3TimerCreate(pVM, enmClock, pszDesc, &pTimer);
811 if (VBOX_SUCCESS(rc))
812 {
813 pTimer->enmType = TMTIMERTYPE_EXTERNAL;
814 pTimer->u.External.pfnTimer = pfnCallback;
815 pTimer->u.External.pvUser = pvUser;
816 Log(("TM: Created external timer %p clock %d callback %p '%s'\n", pTimer, enmClock, pfnCallback, pszDesc));
817 return pTimer;
818 }
819
820 return NULL;
821}
822
823
824/**
825 * Destroy all timers owned by a device.
826 *
827 * @returns VBox status.
828 * @param pVM VM handle.
829 * @param pDevIns Device which timers should be destroyed.
830 */
831TMR3DECL(int) TMR3TimerDestroyDevice(PVM pVM, PPDMDEVINS pDevIns)
832{
833 LogFlow(("TMR3TimerDestroyDevice: pDevIns=%p\n", pDevIns));
834 if (!pDevIns)
835 return VERR_INVALID_PARAMETER;
836
837 PTMTIMER pCur = pVM->tm.s.pCreated;
838 while (pCur)
839 {
840 PTMTIMER pDestroy = pCur;
841 pCur = pDestroy->pBigNext;
842 if ( pDestroy->enmType == TMTIMERTYPE_DEV
843 && pDestroy->u.Dev.pDevIns == pDevIns)
844 {
845 int rc = TMTimerDestroy(pDestroy);
846 AssertRC(rc);
847 }
848 }
849 LogFlow(("TMR3TimerDestroyDevice: returns VINF_SUCCESS\n"));
850 return VINF_SUCCESS;
851}
852
853
854/**
855 * Destroy all timers owned by a driver.
856 *
857 * @returns VBox status.
858 * @param pVM VM handle.
859 * @param pDrvIns Driver which timers should be destroyed.
860 */
861TMR3DECL(int) TMR3TimerDestroyDriver(PVM pVM, PPDMDRVINS pDrvIns)
862{
863 LogFlow(("TMR3TimerDestroyDriver: pDrvIns=%p\n", pDrvIns));
864 if (!pDrvIns)
865 return VERR_INVALID_PARAMETER;
866
867 PTMTIMER pCur = pVM->tm.s.pCreated;
868 while (pCur)
869 {
870 PTMTIMER pDestroy = pCur;
871 pCur = pDestroy->pBigNext;
872 if ( pDestroy->enmType == TMTIMERTYPE_DRV
873 && pDestroy->u.Drv.pDrvIns == pDrvIns)
874 {
875 int rc = TMTimerDestroy(pDestroy);
876 AssertRC(rc);
877 }
878 }
879 LogFlow(("TMR3TimerDestroyDriver: returns VINF_SUCCESS\n"));
880 return VINF_SUCCESS;
881}
882
883
884/**
885 * Checks if a queue has a pending timer.
886 *
887 * @returns true if it has a pending timer.
888 * @returns false is no pending timer.
889 *
890 * @param pVM The VM handle.
891 * @param enmClock The queue.
892 */
893DECLINLINE(bool) tmR3HasPending(PVM pVM, TMCLOCK enmClock)
894{
895 const uint64_t u64Expire = pVM->tm.s.CTXALLSUFF(paTimerQueues)[enmClock].u64Expire;
896 return u64Expire != INT64_MAX && u64Expire <= tmClock(pVM, enmClock);
897}
898
899
900/**
901 * Schedulation timer callback.
902 *
903 * @param pTimer Timer handle.
904 * @param pvUser VM handle.
905 * @remark We cannot do the scheduling and queues running from a timer handler
906 * since it's not executing in EMT, and even if it was it would be async
907 * and we wouldn't know the state of the affairs.
908 * So, we'll just raise the timer FF and force any REM execution to exit.
909 */
910static DECLCALLBACK(void) tmR3TimerCallback(PRTTIMER pTimer, void *pvUser)
911{
912 PVM pVM = (PVM)pvUser;
913 AssertCompile(TMCLOCK_MAX == 4);
914#ifdef DEBUG_Sander /* very annoying, keep it private. */
915 if (VM_FF_ISSET(pVM, VM_FF_TIMER))
916 Log(("tmR3TimerCallback: timer event still pending!!\n"));
917#endif
918 if ( !VM_FF_ISSET(pVM, VM_FF_TIMER)
919 && ( pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL_SYNC].offSchedule
920 || pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL].offSchedule
921 || pVM->tm.s.paTimerQueuesR3[TMCLOCK_REAL].offSchedule
922 || pVM->tm.s.paTimerQueuesR3[TMCLOCK_TSC].offSchedule
923 || tmR3HasPending(pVM, TMCLOCK_VIRTUAL_SYNC)
924 || tmR3HasPending(pVM, TMCLOCK_VIRTUAL)
925 || tmR3HasPending(pVM, TMCLOCK_REAL)
926 || tmR3HasPending(pVM, TMCLOCK_TSC)
927 )
928 && !VM_FF_ISSET(pVM, VM_FF_TIMER)
929 )
930 {
931 VM_FF_SET(pVM, VM_FF_TIMER);
932 REMR3NotifyTimerPending(pVM);
933 VMR3NotifyFF(pVM, true);
934 STAM_COUNTER_INC(&pVM->tm.s.StatTimerCallbackSetFF);
935 }
936}
937
938
939/**
940 * Schedules and runs any pending timers.
941 *
942 * This is normally called from a forced action handler in EMT.
943 *
944 * @param pVM The VM to run the timers for.
945 */
946TMR3DECL(void) TMR3TimerQueuesDo(PVM pVM)
947{
948 STAM_PROFILE_START(&pVM->tm.s.StatDoQueues, a);
949 Log2(("TMR3TimerQueuesDo:\n"));
950
951 /*
952 * Process the queues.
953 */
954 AssertCompile(TMCLOCK_MAX == 4);
955
956 /* TMCLOCK_VIRTUAL */
957 STAM_PROFILE_ADV_START(&pVM->tm.s.StatDoQueuesSchedule, s1);
958 tmTimerQueueSchedule(pVM, &pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL]);
959 STAM_PROFILE_ADV_SUSPEND(&pVM->tm.s.StatDoQueuesSchedule, s1);
960 STAM_PROFILE_ADV_START(&pVM->tm.s.StatDoQueuesRun, r1);
961 tmR3TimerQueueRun(pVM, &pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL]);
962 STAM_PROFILE_ADV_SUSPEND(&pVM->tm.s.StatDoQueuesRun, r1);
963
964 /* TMCLOCK_VIRTUAL_SYNC */
965 STAM_PROFILE_ADV_RESUME(&pVM->tm.s.StatDoQueuesSchedule, s1);
966 tmTimerQueueSchedule(pVM, &pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL_SYNC]);
967 STAM_PROFILE_ADV_SUSPEND(&pVM->tm.s.StatDoQueuesSchedule, s2);
968 STAM_PROFILE_ADV_RESUME(&pVM->tm.s.StatDoQueuesRun, r1);
969 tmR3TimerQueueRun(pVM, &pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL_SYNC]);
970 STAM_PROFILE_ADV_SUSPEND(&pVM->tm.s.StatDoQueuesRun, r2);
971
972 /* TMCLOCK_REAL */
973 STAM_PROFILE_ADV_RESUME(&pVM->tm.s.StatDoQueuesSchedule, s2);
974 tmTimerQueueSchedule(pVM, &pVM->tm.s.paTimerQueuesR3[TMCLOCK_REAL]);
975 STAM_PROFILE_ADV_SUSPEND(&pVM->tm.s.StatDoQueuesSchedule, s3);
976 STAM_PROFILE_ADV_RESUME(&pVM->tm.s.StatDoQueuesRun, r2);
977 tmR3TimerQueueRun(pVM, &pVM->tm.s.paTimerQueuesR3[TMCLOCK_REAL]);
978 STAM_PROFILE_ADV_SUSPEND(&pVM->tm.s.StatDoQueuesRun, r3);
979
980 /* TMCLOCK_TSC */
981 STAM_PROFILE_ADV_RESUME(&pVM->tm.s.StatDoQueuesSchedule, s3);
982 tmTimerQueueSchedule(pVM, &pVM->tm.s.paTimerQueuesR3[TMCLOCK_TSC]);
983 STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatDoQueuesSchedule, s3);
984 STAM_PROFILE_ADV_RESUME(&pVM->tm.s.StatDoQueuesRun, r3);
985 tmR3TimerQueueRun(pVM, &pVM->tm.s.paTimerQueuesR3[TMCLOCK_TSC]);
986 STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatDoQueuesRun, r3);
987
988 /* done. */
989 VM_FF_CLEAR(pVM, VM_FF_TIMER);
990
991#ifdef VBOX_STRICT
992 /* check that we didn't screwup. */
993 tmTimerQueuesSanityChecks(pVM, "TMR3TimerQueuesDo");
994#endif
995
996 Log2(("TMR3TimerQueuesDo: returns void\n"));
997 STAM_PROFILE_STOP(&pVM->tm.s.StatDoQueues, a);
998}
999
1000
1001/**
1002 * Schedules and runs any pending times in the specified queue.
1003 *
1004 * This is normally called from a forced action handler in EMT.
1005 *
1006 * @param pVM The VM to run the timers for.
1007 * @param pQueue The queue to run.
1008 */
1009static void tmR3TimerQueueRun(PVM pVM, PTMTIMERQUEUE pQueue)
1010{
1011 VM_ASSERT_EMT(pVM);
1012
1013 /*
1014 * Run timers.
1015 *
1016 * We check the clock once and run all timers which are ACTIVE
1017 * and have an expire time less or equal to the time we read.
1018 *
1019 * N.B. A generic unlink must be applied since other threads
1020 * are allowed to mess with any active timer at any time.
1021 * However, we only allow EMT to handle EXPIRED_PENDING
1022 * timers, thus enabling the timer handler function to
1023 * arm the timer again.
1024 */
1025 PTMTIMER pNext = TMTIMER_GET_HEAD(pQueue);
1026 if (!pNext)
1027 return;
1028 /** @todo deal with the VIRTUAL_SYNC pausing and catch calcs ++ */
1029 uint64_t u64Now = tmClock(pVM, pQueue->enmClock);
1030 while (pNext && pNext->u64Expire <= u64Now)
1031 {
1032 PTMTIMER pTimer = pNext;
1033 pNext = TMTIMER_GET_NEXT(pTimer);
1034 Log2(("tmR3TimerQueueRun: pTimer=%p:{.enmState=%s, .enmClock=%d, .enmType=%d, u64Expire=%llx (now=%llx) .pszDesc=%s}\n",
1035 pTimer, tmTimerState(pTimer->enmState), pTimer->enmClock, pTimer->enmType, pTimer->u64Expire, u64Now, pTimer->pszDesc));
1036 bool fRc;
1037 TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_EXPIRED, TMTIMERSTATE_ACTIVE, fRc);
1038 if (fRc)
1039 {
1040 Assert(!pTimer->offScheduleNext); /* this can trigger falsely */
1041
1042 /* unlink */
1043 const PTMTIMER pPrev = TMTIMER_GET_PREV(pTimer);
1044 if (pPrev)
1045 TMTIMER_SET_NEXT(pPrev, pNext);
1046 else
1047 {
1048 TMTIMER_SET_HEAD(pQueue, pNext);
1049 pQueue->u64Expire = pNext ? pNext->u64Expire : INT64_MAX;
1050 }
1051 if (pNext)
1052 TMTIMER_SET_PREV(pNext, pPrev);
1053 pTimer->offNext = 0;
1054 pTimer->offPrev = 0;
1055
1056
1057 /* fire */
1058 switch (pTimer->enmType)
1059 {
1060 case TMTIMERTYPE_DEV: pTimer->u.Dev.pfnTimer(pTimer->u.Dev.pDevIns, pTimer); break;
1061 case TMTIMERTYPE_DRV: pTimer->u.Drv.pfnTimer(pTimer->u.Drv.pDrvIns, pTimer); break;
1062 case TMTIMERTYPE_INTERNAL: pTimer->u.Internal.pfnTimer(pVM, pTimer, pTimer->u.Internal.pvUser); break;
1063 case TMTIMERTYPE_EXTERNAL: pTimer->u.External.pfnTimer(pTimer->u.External.pvUser); break;
1064 default:
1065 AssertMsgFailed(("Invalid timer type %d (%s)\n", pTimer->enmType, pTimer->pszDesc));
1066 break;
1067 }
1068
1069 /* change the state if it wasn't changed already in the handler. */
1070 TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_STOPPED, TMTIMERSTATE_EXPIRED, fRc);
1071 Log2(("tmR3TimerQueueRun: new state %s\n", tmTimerState(pTimer->enmState)));
1072 }
1073 } /* run loop */
1074}
1075
1076
1077/**
1078 * Saves the state of a timer to a saved state.
1079 *
1080 * @returns VBox status.
1081 * @param pTimer Timer to save.
1082 * @param pSSM Save State Manager handle.
1083 */
1084TMR3DECL(int) TMR3TimerSave(PTMTIMERHC pTimer, PSSMHANDLE pSSM)
1085{
1086 LogFlow(("TMR3TimerSave: pTimer=%p:{enmState=%s, .pszDesc={%s}} pSSM=%p\n", pTimer, tmTimerState(pTimer->enmState), pTimer->pszDesc, pSSM));
1087 switch (pTimer->enmState)
1088 {
1089 case TMTIMERSTATE_STOPPED:
1090 case TMTIMERSTATE_PENDING_STOP:
1091 case TMTIMERSTATE_PENDING_STOP_SCHEDULE:
1092 return SSMR3PutU8(pSSM, (uint8_t)TMTIMERSTATE_PENDING_STOP);
1093
1094 case TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE:
1095 case TMTIMERSTATE_PENDING_RESCHEDULE_SET_EXPIRE:
1096 AssertMsgFailed(("u64Expire is being updated! (%s)\n", pTimer->pszDesc));
1097 if (!RTThreadYield())
1098 RTThreadSleep(1);
1099 /* fall thru */
1100 case TMTIMERSTATE_ACTIVE:
1101 case TMTIMERSTATE_PENDING_SCHEDULE:
1102 case TMTIMERSTATE_PENDING_RESCHEDULE:
1103 SSMR3PutU8(pSSM, (uint8_t)TMTIMERSTATE_PENDING_SCHEDULE);
1104 return SSMR3PutU64(pSSM, pTimer->u64Expire);
1105
1106 case TMTIMERSTATE_EXPIRED:
1107 case TMTIMERSTATE_PENDING_DESTROY:
1108 case TMTIMERSTATE_PENDING_STOP_DESTROY:
1109 case TMTIMERSTATE_FREE:
1110 AssertMsgFailed(("Invalid timer state %d %s (%s)\n", pTimer->enmState, tmTimerState(pTimer->enmState), pTimer->pszDesc));
1111 return SSMR3HandleSetStatus(pSSM, VERR_TM_INVALID_STATE);
1112 }
1113
1114 AssertMsgFailed(("Unknown timer state %d (%s)\n", pTimer->enmState, pTimer->pszDesc));
1115 return SSMR3HandleSetStatus(pSSM, VERR_TM_UNKNOWN_STATE);
1116}
1117
1118
1119/**
1120 * Loads the state of a timer from a saved state.
1121 *
1122 * @returns VBox status.
1123 * @param pTimer Timer to restore.
1124 * @param pSSM Save State Manager handle.
1125 */
1126TMR3DECL(int) TMR3TimerLoad(PTMTIMERHC pTimer, PSSMHANDLE pSSM)
1127{
1128 Assert(pTimer); Assert(pSSM); VM_ASSERT_EMT(pTimer->pVMR3);
1129 LogFlow(("TMR3TimerLoad: pTimer=%p:{enmState=%s, .pszDesc={%s}} pSSM=%p\n", pTimer, tmTimerState(pTimer->enmState), pTimer->pszDesc, pSSM));
1130
1131 /*
1132 * Load the state and validate it.
1133 */
1134 uint8_t u8State;
1135 int rc = SSMR3GetU8(pSSM, &u8State);
1136 if (VBOX_FAILURE(rc))
1137 return rc;
1138 TMTIMERSTATE enmState = (TMTIMERSTATE)u8State;
1139 if ( enmState != TMTIMERSTATE_PENDING_STOP
1140 && enmState != TMTIMERSTATE_PENDING_SCHEDULE
1141 && enmState != TMTIMERSTATE_PENDING_STOP_SCHEDULE)
1142 {
1143 AssertMsgFailed(("enmState=%d %s\n", enmState, tmTimerState(enmState)));
1144 return SSMR3HandleSetStatus(pSSM, VERR_TM_LOAD_STATE);
1145 }
1146
1147 if (enmState == TMTIMERSTATE_PENDING_SCHEDULE)
1148 {
1149 /*
1150 * Load the expire time.
1151 */
1152 uint64_t u64Expire;
1153 rc = SSMR3GetU64(pSSM, &u64Expire);
1154 if (VBOX_FAILURE(rc))
1155 return rc;
1156
1157 /*
1158 * Set it.
1159 */
1160 Log(("enmState=%d %s u64Expire=%llu\n", enmState, tmTimerState(enmState), u64Expire));
1161 rc = TMTimerSet(pTimer, u64Expire);
1162 }
1163 else
1164 {
1165 /*
1166 * Stop it.
1167 */
1168 Log(("enmState=%d %s\n", enmState, tmTimerState(enmState)));
1169 rc = TMTimerStop(pTimer);
1170 }
1171
1172 /*
1173 * On failure set SSM status.
1174 */
1175 if (VBOX_FAILURE(rc))
1176 rc = SSMR3HandleSetStatus(pSSM, rc);
1177 return rc;
1178}
1179
1180
1181/**
1182 * Display all timers.
1183 *
1184 * @param pVM VM Handle.
1185 * @param pHlp The info helpers.
1186 * @param pszArgs Arguments, ignored.
1187 */
1188static DECLCALLBACK(void) tmR3TimerInfo(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
1189{
1190 NOREF(pszArgs);
1191 pHlp->pfnPrintf(pHlp,
1192 "Timers (pVM=%p)\n"
1193 "%.*s %.*s %.*s %.*s Clock %-18s %-18s %-25s Description\n",
1194 pVM,
1195 sizeof(RTR3PTR) * 2, "pTimerR3 ",
1196 sizeof(int32_t) * 2, "offNext ",
1197 sizeof(int32_t) * 2, "offPrev ",
1198 sizeof(int32_t) * 2, "offSched ",
1199 "Time",
1200 "Expire",
1201 "State");
1202 for (PTMTIMERHC pTimer = pVM->tm.s.pCreated; pTimer; pTimer = pTimer->pBigNext)
1203 {
1204 pHlp->pfnPrintf(pHlp,
1205 "%p %08RX32 %08RX32 %08RX32 %s %18RU64 %18RU64 %-25s %s\n",
1206 pTimer,
1207 pTimer->offNext,
1208 pTimer->offPrev,
1209 pTimer->offScheduleNext,
1210 pTimer->enmClock == TMCLOCK_REAL ? "Real " : "Virt ",
1211 TMTimerGet(pTimer),
1212 pTimer->u64Expire,
1213 tmTimerState(pTimer->enmState),
1214 pTimer->pszDesc);
1215 }
1216}
1217
1218
1219/**
1220 * Display all active timers.
1221 *
1222 * @param pVM VM Handle.
1223 * @param pHlp The info helpers.
1224 * @param pszArgs Arguments, ignored.
1225 */
1226static DECLCALLBACK(void) tmR3TimerInfoActive(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
1227{
1228 NOREF(pszArgs);
1229 pHlp->pfnPrintf(pHlp,
1230 "Active Timers (pVM=%p)\n"
1231 "%.*s %.*s %.*s %.*s Clock %-18s %-18s %-25s Description\n",
1232 pVM,
1233 sizeof(RTR3PTR) * 2, "pTimerR3 ",
1234 sizeof(int32_t) * 2, "offNext ",
1235 sizeof(int32_t) * 2, "offPrev ",
1236 sizeof(int32_t) * 2, "offSched ",
1237 "Time",
1238 "Expire",
1239 "State");
1240 for (unsigned iQueue = 0; iQueue < TMCLOCK_MAX; iQueue++)
1241 {
1242 for (PTMTIMERHC pTimer = TMTIMER_GET_HEAD(&pVM->tm.s.paTimerQueuesR3[iQueue]);
1243 pTimer;
1244 pTimer = TMTIMER_GET_NEXT(pTimer))
1245 {
1246 pHlp->pfnPrintf(pHlp,
1247 "%p %08RX32 %08RX32 %08RX32 %s %18RU64 %18RU64 %-25s %s\n",
1248 pTimer,
1249 pTimer->offNext,
1250 pTimer->offPrev,
1251 pTimer->offScheduleNext,
1252 pTimer->enmClock == TMCLOCK_REAL ? "Real " : "Virt ",
1253 TMTimerGet(pTimer),
1254 pTimer->u64Expire,
1255 tmTimerState(pTimer->enmState),
1256 pTimer->pszDesc);
1257 }
1258 }
1259}
1260
1261
1262/**
1263 * Display all clocks.
1264 *
1265 * @param pVM VM Handle.
1266 * @param pHlp The info helpers.
1267 * @param pszArgs Arguments, ignored.
1268 */
1269static DECLCALLBACK(void) tmR3InfoClocks(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
1270{
1271 NOREF(pszArgs);
1272
1273 /* TSC */
1274 uint64_t u64 = TMCpuTickGet(pVM);
1275 pHlp->pfnPrintf(pHlp,
1276 "Cpu Tick: %#RX64 (%RU64) %RU64Hz %s%s",
1277 u64, u64, TMCpuTicksPerSecond(pVM),
1278 pVM->tm.s.fTSCTicking ? "ticking" : "paused",
1279 pVM->tm.s.fTSCVirtualized ? " - virtualized" : "");
1280 if (pVM->tm.s.fTSCUseRealTSC)
1281 {
1282 pHlp->pfnPrintf(pHlp, "- real tsc");
1283 if (pVM->tm.s.u64TSCOffset)
1284 pHlp->pfnPrintf(pHlp, "\n offset %#RX64", pVM->tm.s.u64TSCOffset);
1285 }
1286 else
1287 pHlp->pfnPrintf(pHlp, "- virtual clock");
1288 pHlp->pfnPrintf(pHlp, "\n");
1289
1290 /* virtual */
1291 u64 = TMVirtualGet(pVM);
1292 pHlp->pfnPrintf(pHlp,
1293 " Virtual: %#RX64 (%RU64) %RU64Hz %s",
1294 u64, u64, TMVirtualGetFreq(pVM),
1295 pVM->tm.s.fVirtualTicking ? "ticking" : "paused");
1296 if (pVM->tm.s.fVirtualWarpDrive)
1297 pHlp->pfnPrintf(pHlp, " WarpDrive %RU32 %%", pVM->tm.s.u32VirtualWarpDrivePercentage);
1298 pHlp->pfnPrintf(pHlp, "\n");
1299
1300 /* virtual sync */
1301 u64 = TMVirtualGetSync(pVM);
1302 pHlp->pfnPrintf(pHlp,
1303 "VirtSync: %#RX64 (%RU64) %s%s",
1304 u64, u64,
1305 pVM->tm.s.fVirtualSyncTicking ? "ticking" : "paused",
1306 pVM->tm.s.fVirtualSyncCatchUp ? " - catchup" : "");
1307 if (pVM->tm.s.u64VirtualSyncOffset)
1308 pHlp->pfnPrintf(pHlp, "\n offset %#RX64", pVM->tm.s.u64VirtualSyncOffset);
1309 pHlp->pfnPrintf(pHlp, "\n");
1310
1311 /* real */
1312 u64 = TMRealGet(pVM);
1313 pHlp->pfnPrintf(pHlp,
1314 " Real: %#RX64 (%RU64) %RU64Hz\n",
1315 u64, u64, TMRealGetFreq(pVM));
1316}
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