VirtualBox

source: vbox/trunk/src/VBox/VMM/TM.cpp@ 13813

Last change on this file since 13813 was 13796, checked in by vboxsync, 16 years ago

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1/* $Id: TM.cpp 13796 2008-11-04 18:37:33Z vboxsync $ */
2/** @file
3 * TM - Time Manager.
4 */
5
6/*
7 * Copyright (C) 2006-2007 Sun Microsystems, Inc.
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 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18 * Clara, CA 95054 USA or visit http://www.sun.com if you need
19 * additional information or have any questions.
20 */
21
22/** @page pg_tm TM - The Time Manager
23 *
24 * The Time Manager abstracts the CPU clocks and manages timers used by the VMM,
25 * device and drivers.
26 *
27 * @see grp_tm
28 *
29 *
30 * @section sec_tm_clocks Clocks
31 *
32 * There are currently 4 clocks:
33 * - Virtual (guest).
34 * - Synchronous virtual (guest).
35 * - CPU Tick (TSC) (guest). Only current use is rdtsc emulation. Usually a
36 * function of the virtual clock.
37 * - Real (host). This is only used for display updates atm.
38 *
39 * The most important clocks are the three first ones and of these the second is
40 * the most interesting.
41 *
42 *
43 * The synchronous virtual clock is tied to the virtual clock except that it
44 * will take into account timer delivery lag caused by host scheduling. It will
45 * normally never advance beyond the head timer, and when lagging too far behind
46 * it will gradually speed up to catch up with the virtual clock. All devices
47 * implementing time sources accessible to and used by the guest is using this
48 * clock (for timers and other things). This ensures consistency between the
49 * time sources.
50 *
51 * The virtual clock is implemented as an offset to a monotonic, high
52 * resolution, wall clock. The current time source is using the RTTimeNanoTS()
53 * machinery based upon the Global Info Pages (GIP), that is, we're using TSC
54 * deltas (usually 10 ms) to fill the gaps between GIP updates. The result is
55 * a fairly high res clock that works in all contexts and on all hosts. The
56 * virtual clock is paused when the VM isn't in the running state.
57 *
58 * The CPU tick (TSC) is normally virtualized as a function of the synchronous
59 * virtual clock, where the frequency defaults to the host cpu frequency (as we
60 * measure it). In this mode it is possible to configure the frequency. Another
61 * (non-default) option is to use the raw unmodified host TSC values. And yet
62 * another, to tie it to time spent executing guest code. All these things are
63 * configurable should non-default behavior be desirable.
64 *
65 * The real clock is a monotonic clock (when available) with relatively low
66 * resolution, though this a bit host specific. Note that we're currently not
67 * servicing timers using the real clock when the VM is not running, this is
68 * simply because it has not been needed yet therefore not implemented.
69 *
70 *
71 * @subsection subsec_tm_timesync Guest Time Sync / UTC time
72 *
73 * Guest time syncing is primarily taken care of by the VMM device. The
74 * principle is very simple, the guest additions periodically asks the VMM
75 * device what the current UTC time is and makes adjustments accordingly.
76 *
77 * A complicating factor is that the synchronous virtual clock might be doing
78 * catchups and the guest perception is currently a little bit behind the world
79 * but it will (hopefully) be catching up soon as we're feeding timer interrupts
80 * at a slightly higher rate. Adjusting the guest clock to the current wall
81 * time in the real world would be a bad idea then because the guest will be
82 * advancing too fast and run ahead of world time (if the catchup works out).
83 * To solve this problem TM provides the VMM device with an UTC time source that
84 * gets adjusted with the current lag, so that when the guest eventually catches
85 * up the lag it will be showing correct real world time.
86 *
87 *
88 * @section sec_tm_timers Timers
89 *
90 * The timers can use any of the TM clocks described in the previous section.
91 * Each clock has its own scheduling facility, or timer queue if you like.
92 * There are a few factors which makes it a bit complex. First, there is the
93 * usual R0 vs R3 vs. RC thing. Then there is multiple threads, and then there
94 * is the timer thread that periodically checks whether any timers has expired
95 * without EMT noticing. On the API level, all but the create and save APIs
96 * must be mulithreaded. EMT will always run the timers.
97 *
98 * The design is using a doubly linked list of active timers which is ordered
99 * by expire date. This list is only modified by the EMT thread. Updates to
100 * the list are batched in a singly linked list, which is then process by the
101 * EMT thread at the first opportunity (immediately, next time EMT modifies a
102 * timer on that clock, or next timer timeout). Both lists are offset based and
103 * all the elements are therefore allocated from the hyper heap.
104 *
105 * For figuring out when there is need to schedule and run timers TM will:
106 * - Poll whenever somebody queries the virtual clock.
107 * - Poll the virtual clocks from the EM and REM loops.
108 * - Poll the virtual clocks from trap exit path.
109 * - Poll the virtual clocks and calculate first timeout from the halt loop.
110 * - Employ a thread which periodically (100Hz) polls all the timer queues.
111 *
112 *
113 * @section sec_tm_timer Logging
114 *
115 * Level 2: Logs a most of the timer state transitions and queue servicing.
116 * Level 3: Logs a few oddments.
117 * Level 4: Logs TMCLOCK_VIRTUAL_SYNC catch-up events.
118 *
119 */
120
121/*******************************************************************************
122* Header Files *
123*******************************************************************************/
124#define LOG_GROUP LOG_GROUP_TM
125#include <VBox/tm.h>
126#include <VBox/vmm.h>
127#include <VBox/mm.h>
128#include <VBox/ssm.h>
129#include <VBox/dbgf.h>
130#include <VBox/rem.h>
131#include <VBox/pdm.h>
132#include "TMInternal.h"
133#include <VBox/vm.h>
134
135#include <VBox/param.h>
136#include <VBox/err.h>
137
138#include <VBox/log.h>
139#include <iprt/asm.h>
140#include <iprt/assert.h>
141#include <iprt/thread.h>
142#include <iprt/time.h>
143#include <iprt/timer.h>
144#include <iprt/semaphore.h>
145#include <iprt/string.h>
146#include <iprt/env.h>
147
148
149/*******************************************************************************
150* Defined Constants And Macros *
151*******************************************************************************/
152/** The current saved state version.*/
153#define TM_SAVED_STATE_VERSION 3
154
155
156/*******************************************************************************
157* Internal Functions *
158*******************************************************************************/
159static bool tmR3HasFixedTSC(PVM pVM);
160static uint64_t tmR3CalibrateTSC(PVM pVM);
161static DECLCALLBACK(int) tmR3Save(PVM pVM, PSSMHANDLE pSSM);
162static DECLCALLBACK(int) tmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version);
163static DECLCALLBACK(void) tmR3TimerCallback(PRTTIMER pTimer, void *pvUser, uint64_t iTick);
164static void tmR3TimerQueueRun(PVM pVM, PTMTIMERQUEUE pQueue);
165static void tmR3TimerQueueRunVirtualSync(PVM pVM);
166static DECLCALLBACK(void) tmR3TimerInfo(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
167static DECLCALLBACK(void) tmR3TimerInfoActive(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
168static DECLCALLBACK(void) tmR3InfoClocks(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs);
169
170
171/**
172 * Initializes the TM.
173 *
174 * @returns VBox status code.
175 * @param pVM The VM to operate on.
176 */
177VMMR3DECL(int) TMR3Init(PVM pVM)
178{
179 LogFlow(("TMR3Init:\n"));
180
181 /*
182 * Assert alignment and sizes.
183 */
184 AssertRelease(!(RT_OFFSETOF(VM, tm.s) & 31));
185 AssertRelease(sizeof(pVM->tm.s) <= sizeof(pVM->tm.padding));
186
187 /*
188 * Init the structure.
189 */
190 void *pv;
191 int rc = MMHyperAlloc(pVM, sizeof(pVM->tm.s.paTimerQueuesR3[0]) * TMCLOCK_MAX, 0, MM_TAG_TM, &pv);
192 AssertRCReturn(rc, rc);
193 pVM->tm.s.paTimerQueuesR3 = (PTMTIMERQUEUE)pv;
194 pVM->tm.s.paTimerQueuesR0 = MMHyperR3ToR0(pVM, pv);
195 pVM->tm.s.paTimerQueuesRC = MMHyperR3ToRC(pVM, pv);
196
197 pVM->tm.s.offVM = RT_OFFSETOF(VM, tm.s);
198 pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL].enmClock = TMCLOCK_VIRTUAL;
199 pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL].u64Expire = INT64_MAX;
200 pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL_SYNC].enmClock = TMCLOCK_VIRTUAL_SYNC;
201 pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL_SYNC].u64Expire = INT64_MAX;
202 pVM->tm.s.paTimerQueuesR3[TMCLOCK_REAL].enmClock = TMCLOCK_REAL;
203 pVM->tm.s.paTimerQueuesR3[TMCLOCK_REAL].u64Expire = INT64_MAX;
204 pVM->tm.s.paTimerQueuesR3[TMCLOCK_TSC].enmClock = TMCLOCK_TSC;
205 pVM->tm.s.paTimerQueuesR3[TMCLOCK_TSC].u64Expire = INT64_MAX;
206
207 /*
208 * We directly use the GIP to calculate the virtual time. We map the
209 * the GIP into the guest context so we can do this calculation there
210 * as well and save costly world switches.
211 */
212 pVM->tm.s.pvGIPR3 = (void *)g_pSUPGlobalInfoPage;
213 AssertMsgReturn(pVM->tm.s.pvGIPR3, ("GIP support is now required!\n"), VERR_INTERNAL_ERROR);
214 RTHCPHYS HCPhysGIP;
215 rc = SUPGipGetPhys(&HCPhysGIP);
216 AssertMsgRCReturn(rc, ("Failed to get GIP physical address!\n"), rc);
217
218 RTGCPTR GCPtr;
219 rc = MMR3HyperMapHCPhys(pVM, pVM->tm.s.pvGIPR3, HCPhysGIP, PAGE_SIZE, "GIP", &GCPtr);
220 if (VBOX_FAILURE(rc))
221 {
222 AssertMsgFailed(("Failed to map GIP into GC, rc=%Vrc!\n", rc));
223 return rc;
224 }
225 pVM->tm.s.pvGIPRC = GCPtr;
226 LogFlow(("TMR3Init: HCPhysGIP=%RHp at %RRv\n", HCPhysGIP, pVM->tm.s.pvGIPRC));
227 MMR3HyperReserve(pVM, PAGE_SIZE, "fence", NULL);
228
229 /* Check assumptions made in TMAllVirtual.cpp about the GIP update interval. */
230 if ( g_pSUPGlobalInfoPage->u32Magic == SUPGLOBALINFOPAGE_MAGIC
231 && g_pSUPGlobalInfoPage->u32UpdateIntervalNS >= 250000000 /* 0.25s */)
232 return VMSetError(pVM, VERR_INTERNAL_ERROR, RT_SRC_POS,
233 N_("The GIP update interval is too big. u32UpdateIntervalNS=%RU32 (u32UpdateHz=%RU32)"),
234 g_pSUPGlobalInfoPage->u32UpdateIntervalNS, g_pSUPGlobalInfoPage->u32UpdateHz);
235
236 /*
237 * Setup the VirtualGetRaw backend.
238 */
239 pVM->tm.s.VirtualGetRawDataR3.pu64Prev = &pVM->tm.s.u64VirtualRawPrev;
240 pVM->tm.s.VirtualGetRawDataR3.pfnBad = tmVirtualNanoTSBad;
241 pVM->tm.s.VirtualGetRawDataR3.pfnRediscover = tmVirtualNanoTSRediscover;
242 if (ASMCpuId_EDX(1) & X86_CPUID_FEATURE_EDX_SSE2)
243 {
244 if (g_pSUPGlobalInfoPage->u32Mode == SUPGIPMODE_SYNC_TSC)
245 pVM->tm.s.pfnVirtualGetRawR3 = RTTimeNanoTSLFenceSync;
246 else
247 pVM->tm.s.pfnVirtualGetRawR3 = RTTimeNanoTSLFenceAsync;
248 }
249 else
250 {
251 if (g_pSUPGlobalInfoPage->u32Mode == SUPGIPMODE_SYNC_TSC)
252 pVM->tm.s.pfnVirtualGetRawR3 = RTTimeNanoTSLegacySync;
253 else
254 pVM->tm.s.pfnVirtualGetRawR3 = RTTimeNanoTSLegacyAsync;
255 }
256
257 pVM->tm.s.VirtualGetRawDataRC.pu64Prev = MMHyperR3ToRC(pVM, (void *)&pVM->tm.s.u64VirtualRawPrev);
258 pVM->tm.s.VirtualGetRawDataR0.pu64Prev = MMHyperR3ToR0(pVM, (void *)&pVM->tm.s.u64VirtualRawPrev);
259 AssertReturn(pVM->tm.s.VirtualGetRawDataR0.pu64Prev, VERR_INTERNAL_ERROR);
260 /* The rest is done in TMR3InitFinalize since it's too early to call PDM. */
261
262
263 /*
264 * Get our CFGM node, create it if necessary.
265 */
266 PCFGMNODE pCfgHandle = CFGMR3GetChild(CFGMR3GetRoot(pVM), "TM");
267 if (!pCfgHandle)
268 {
269 rc = CFGMR3InsertNode(CFGMR3GetRoot(pVM), "TM", &pCfgHandle);
270 AssertRCReturn(rc, rc);
271 }
272
273 /*
274 * Determin the TSC configuration and frequency.
275 */
276 /* mode */
277 /** @cfgm{/TM/TSCVirtualized,bool,true}
278 * Use a virtualize TSC, i.e. trap all TSC access. */
279 rc = CFGMR3QueryBool(pCfgHandle, "TSCVirtualized", &pVM->tm.s.fTSCVirtualized);
280 if (rc == VERR_CFGM_VALUE_NOT_FOUND)
281 pVM->tm.s.fTSCVirtualized = true; /* trap rdtsc */
282 else if (VBOX_FAILURE(rc))
283 return VMSetError(pVM, rc, RT_SRC_POS,
284 N_("Configuration error: Failed to querying bool value \"UseRealTSC\""));
285
286 /* source */
287 /** @cfgm{/TM/UseRealTSC,bool,false}
288 * Use the real TSC as time source for the TSC instead of the synchronous
289 * virtual clock (false, default). */
290 rc = CFGMR3QueryBool(pCfgHandle, "UseRealTSC", &pVM->tm.s.fTSCUseRealTSC);
291 if (rc == VERR_CFGM_VALUE_NOT_FOUND)
292 pVM->tm.s.fTSCUseRealTSC = false; /* use virtual time */
293 else if (VBOX_FAILURE(rc))
294 return VMSetError(pVM, rc, RT_SRC_POS,
295 N_("Configuration error: Failed to querying bool value \"UseRealTSC\""));
296 if (!pVM->tm.s.fTSCUseRealTSC)
297 pVM->tm.s.fTSCVirtualized = true;
298
299 /* TSC reliability */
300 /** @cfgm{/TM/MaybeUseOffsettedHostTSC,bool,detect}
301 * Whether the CPU has a fixed TSC rate and may be used in offsetted mode with
302 * VT-x/AMD-V execution. This is autodetected in a very restrictive way by
303 * default. */
304 rc = CFGMR3QueryBool(pCfgHandle, "MaybeUseOffsettedHostTSC", &pVM->tm.s.fMaybeUseOffsettedHostTSC);
305 if (rc == VERR_CFGM_VALUE_NOT_FOUND)
306 {
307 if (!pVM->tm.s.fTSCUseRealTSC)
308 pVM->tm.s.fMaybeUseOffsettedHostTSC = tmR3HasFixedTSC(pVM);
309 else
310 pVM->tm.s.fMaybeUseOffsettedHostTSC = true;
311 }
312
313 /** @cfgm{TM/TSCTicksPerSecond, uint32_t, Current TSC frequency from GIP}
314 * The number of TSC ticks per second (i.e. the TSC frequency). This will
315 * override TSCUseRealTSC, TSCVirtualized and MaybeUseOffsettedHostTSC.
316 */
317 rc = CFGMR3QueryU64(pCfgHandle, "TSCTicksPerSecond", &pVM->tm.s.cTSCTicksPerSecond);
318 if (rc == VERR_CFGM_VALUE_NOT_FOUND)
319 {
320 pVM->tm.s.cTSCTicksPerSecond = tmR3CalibrateTSC(pVM);
321 if ( !pVM->tm.s.fTSCUseRealTSC
322 && pVM->tm.s.cTSCTicksPerSecond >= _4G)
323 {
324 pVM->tm.s.cTSCTicksPerSecond = _4G - 1; /* (A limitation of our math code) */
325 pVM->tm.s.fMaybeUseOffsettedHostTSC = false;
326 }
327 }
328 else if (VBOX_FAILURE(rc))
329 return VMSetError(pVM, rc, RT_SRC_POS,
330 N_("Configuration error: Failed to querying uint64_t value \"TSCTicksPerSecond\""));
331 else if ( pVM->tm.s.cTSCTicksPerSecond < _1M
332 || pVM->tm.s.cTSCTicksPerSecond >= _4G)
333 return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS,
334 N_("Configuration error: \"TSCTicksPerSecond\" = %RI64 is not in the range 1MHz..4GHz-1"),
335 pVM->tm.s.cTSCTicksPerSecond);
336 else
337 {
338 pVM->tm.s.fTSCUseRealTSC = pVM->tm.s.fMaybeUseOffsettedHostTSC = false;
339 pVM->tm.s.fTSCVirtualized = true;
340 }
341
342 /** @cfgm{TM/TSCTiedToExecution, bool, false}
343 * Whether the TSC should be tied to execution. This will exclude most of the
344 * virtualization overhead, but will by default include the time spend in the
345 * halt state (see TM/TSCNotTiedToHalt). This setting will override all other
346 * TSC settings except for TSCTicksPerSecond and TSCNotTiedToHalt, which should
347 * be used avoided or used with great care. Note that this will only work right
348 * together with VT-x or AMD-V, and with a single virtual CPU. */
349 rc = CFGMR3QueryBoolDef(pCfgHandle, "TSCTiedToExecution", &pVM->tm.s.fTSCTiedToExecution, false);
350 if (RT_FAILURE(rc))
351 return VMSetError(pVM, rc, RT_SRC_POS,
352 N_("Configuration error: Failed to querying bool value \"TSCTiedToExecution\""));
353 if (pVM->tm.s.fTSCTiedToExecution)
354 {
355 /* tied to execution, override all other settings. */
356 pVM->tm.s.fTSCVirtualized = true;
357 pVM->tm.s.fTSCUseRealTSC = true;
358 pVM->tm.s.fMaybeUseOffsettedHostTSC = false;
359 }
360
361 /** @cfgm{TM/TSCNotTiedToHalt, bool, true}
362 * For overriding the default of TM/TSCTiedToExecution, i.e. set this to false
363 * to make the TSC freeze during HLT. */
364 rc = CFGMR3QueryBoolDef(pCfgHandle, "TSCNotTiedToHalt", &pVM->tm.s.fTSCNotTiedToHalt, false);
365 if (RT_FAILURE(rc))
366 return VMSetError(pVM, rc, RT_SRC_POS,
367 N_("Configuration error: Failed to querying bool value \"TSCNotTiedToHalt\""));
368
369 /* setup and report */
370 if (pVM->tm.s.fTSCVirtualized)
371 CPUMR3SetCR4Feature(pVM, X86_CR4_TSD, ~X86_CR4_TSD);
372 else
373 CPUMR3SetCR4Feature(pVM, 0, ~X86_CR4_TSD);
374 LogRel(("TM: cTSCTicksPerSecond=%#RX64 (%RU64) fTSCVirtualized=%RTbool fTSCUseRealTSC=%RTbool\n"
375 "TM: fMaybeUseOffsettedHostTSC=%RTbool TSCTiedToExecution=%RTbool TSCNotTiedToHalt=%RTbool\n",
376 pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.fTSCVirtualized, pVM->tm.s.fTSCUseRealTSC,
377 pVM->tm.s.fMaybeUseOffsettedHostTSC, pVM->tm.s.fTSCTiedToExecution, pVM->tm.s.fTSCNotTiedToHalt));
378
379 /*
380 * Configure the timer synchronous virtual time.
381 */
382 /** @cfgm{TM/ScheduleSlack, uint32_t, ns, 0, UINT32_MAX, 100000}
383 * Scheduling slack when processing timers. */
384 rc = CFGMR3QueryU32(pCfgHandle, "ScheduleSlack", &pVM->tm.s.u32VirtualSyncScheduleSlack);
385 if (rc == VERR_CFGM_VALUE_NOT_FOUND)
386 pVM->tm.s.u32VirtualSyncScheduleSlack = 100000; /* 0.100ms (ASSUMES virtual time is nanoseconds) */
387 else if (VBOX_FAILURE(rc))
388 return VMSetError(pVM, rc, RT_SRC_POS,
389 N_("Configuration error: Failed to querying 32-bit integer value \"ScheduleSlack\""));
390
391 /** @cfgm{TM/CatchUpStopThreshold, uint64_t, ns, 0, UINT64_MAX, 500000}
392 * When to stop a catch-up, considering it successful. */
393 rc = CFGMR3QueryU64(pCfgHandle, "CatchUpStopThreshold", &pVM->tm.s.u64VirtualSyncCatchUpStopThreshold);
394 if (rc == VERR_CFGM_VALUE_NOT_FOUND)
395 pVM->tm.s.u64VirtualSyncCatchUpStopThreshold = 500000; /* 0.5ms */
396 else if (VBOX_FAILURE(rc))
397 return VMSetError(pVM, rc, RT_SRC_POS,
398 N_("Configuration error: Failed to querying 64-bit integer value \"CatchUpStopThreshold\""));
399
400 /** @cfgm{TM/CatchUpGiveUpThreshold, uint64_t, ns, 0, UINT64_MAX, 60000000000}
401 * When to give up a catch-up attempt. */
402 rc = CFGMR3QueryU64(pCfgHandle, "CatchUpGiveUpThreshold", &pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold);
403 if (rc == VERR_CFGM_VALUE_NOT_FOUND)
404 pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold = UINT64_C(60000000000); /* 60 sec */
405 else if (VBOX_FAILURE(rc))
406 return VMSetError(pVM, rc, RT_SRC_POS,
407 N_("Configuration error: Failed to querying 64-bit integer value \"CatchUpGiveUpThreshold\""));
408
409
410 /** @cfgm{TM/CatchUpPrecentage[0..9], uint32_t, %, 1, 2000, various}
411 * The catch-up percent for a given period. */
412 /** @cfgm{TM/CatchUpStartThreshold[0..9], uint64_t, ns, 0, UINT64_MAX,
413 * The catch-up period threshold, or if you like, when a period starts. */
414#define TM_CFG_PERIOD(iPeriod, DefStart, DefPct) \
415 do \
416 { \
417 uint64_t u64; \
418 rc = CFGMR3QueryU64(pCfgHandle, "CatchUpStartThreshold" #iPeriod, &u64); \
419 if (rc == VERR_CFGM_VALUE_NOT_FOUND) \
420 u64 = UINT64_C(DefStart); \
421 else if (VBOX_FAILURE(rc)) \
422 return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: Failed to querying 64-bit integer value \"CatchUpThreshold" #iPeriod "\"")); \
423 if ( (iPeriod > 0 && u64 <= pVM->tm.s.aVirtualSyncCatchUpPeriods[iPeriod - 1].u64Start) \
424 || u64 >= pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold) \
425 return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS, N_("Configuration error: Invalid start of period #" #iPeriod ": %RU64"), u64); \
426 pVM->tm.s.aVirtualSyncCatchUpPeriods[iPeriod].u64Start = u64; \
427 rc = CFGMR3QueryU32(pCfgHandle, "CatchUpPrecentage" #iPeriod, &pVM->tm.s.aVirtualSyncCatchUpPeriods[iPeriod].u32Percentage); \
428 if (rc == VERR_CFGM_VALUE_NOT_FOUND) \
429 pVM->tm.s.aVirtualSyncCatchUpPeriods[iPeriod].u32Percentage = (DefPct); \
430 else if (VBOX_FAILURE(rc)) \
431 return VMSetError(pVM, rc, RT_SRC_POS, N_("Configuration error: Failed to querying 32-bit integer value \"CatchUpPrecentage" #iPeriod "\"")); \
432 } while (0)
433 /* This needs more tuning. Not sure if we really need so many period and be so gentle. */
434 TM_CFG_PERIOD(0, 750000, 5); /* 0.75ms at 1.05x */
435 TM_CFG_PERIOD(1, 1500000, 10); /* 1.50ms at 1.10x */
436 TM_CFG_PERIOD(2, 8000000, 25); /* 8ms at 1.25x */
437 TM_CFG_PERIOD(3, 30000000, 50); /* 30ms at 1.50x */
438 TM_CFG_PERIOD(4, 75000000, 75); /* 75ms at 1.75x */
439 TM_CFG_PERIOD(5, 175000000, 100); /* 175ms at 2x */
440 TM_CFG_PERIOD(6, 500000000, 200); /* 500ms at 3x */
441 TM_CFG_PERIOD(7, 3000000000, 300); /* 3s at 4x */
442 TM_CFG_PERIOD(8,30000000000, 400); /* 30s at 5x */
443 TM_CFG_PERIOD(9,55000000000, 500); /* 55s at 6x */
444 AssertCompile(RT_ELEMENTS(pVM->tm.s.aVirtualSyncCatchUpPeriods) == 10);
445#undef TM_CFG_PERIOD
446
447 /*
448 * Configure real world time (UTC).
449 */
450 /** @cfgm{TM/UTCOffset, int64_t, ns, INT64_MIN, INT64_MAX, 0}
451 * The UTC offset. This is used to put the guest back or forwards in time. */
452 rc = CFGMR3QueryS64(pCfgHandle, "UTCOffset", &pVM->tm.s.offUTC);
453 if (rc == VERR_CFGM_VALUE_NOT_FOUND)
454 pVM->tm.s.offUTC = 0; /* ns */
455 else if (VBOX_FAILURE(rc))
456 return VMSetError(pVM, rc, RT_SRC_POS,
457 N_("Configuration error: Failed to querying 64-bit integer value \"UTCOffset\""));
458
459 /*
460 * Setup the warp drive.
461 */
462 /** @cfgm{TM/WarpDrivePercentage, uint32_t, %, 0, 20000, 100}
463 * The warp drive percentage, 100% is normal speed. This is used to speed up
464 * or slow down the virtual clock, which can be useful for fast forwarding
465 * borring periods during tests. */
466 rc = CFGMR3QueryU32(pCfgHandle, "WarpDrivePercentage", &pVM->tm.s.u32VirtualWarpDrivePercentage);
467 if (rc == VERR_CFGM_VALUE_NOT_FOUND)
468 rc = CFGMR3QueryU32(CFGMR3GetRoot(pVM), "WarpDrivePercentage", &pVM->tm.s.u32VirtualWarpDrivePercentage); /* legacy */
469 if (rc == VERR_CFGM_VALUE_NOT_FOUND)
470 pVM->tm.s.u32VirtualWarpDrivePercentage = 100;
471 else if (VBOX_FAILURE(rc))
472 return VMSetError(pVM, rc, RT_SRC_POS,
473 N_("Configuration error: Failed to querying uint32_t value \"WarpDrivePercent\""));
474 else if ( pVM->tm.s.u32VirtualWarpDrivePercentage < 2
475 || pVM->tm.s.u32VirtualWarpDrivePercentage > 20000)
476 return VMSetError(pVM, VERR_INVALID_PARAMETER, RT_SRC_POS,
477 N_("Configuration error: \"WarpDrivePercent\" = %RI32 is not in the range 2..20000"),
478 pVM->tm.s.u32VirtualWarpDrivePercentage);
479 pVM->tm.s.fVirtualWarpDrive = pVM->tm.s.u32VirtualWarpDrivePercentage != 100;
480 if (pVM->tm.s.fVirtualWarpDrive)
481 LogRel(("TM: u32VirtualWarpDrivePercentage=%RI32\n", pVM->tm.s.u32VirtualWarpDrivePercentage));
482
483 /*
484 * Start the timer (guard against REM not yielding).
485 */
486 /** @cfgm{TM/TimerMillies, uint32_t, ms, 1, 1000, 10}
487 * The watchdog timer interval. */
488 uint32_t u32Millies;
489 rc = CFGMR3QueryU32(pCfgHandle, "TimerMillies", &u32Millies);
490 if (rc == VERR_CFGM_VALUE_NOT_FOUND)
491 u32Millies = 10;
492 else if (VBOX_FAILURE(rc))
493 return VMSetError(pVM, rc, RT_SRC_POS,
494 N_("Configuration error: Failed to query uint32_t value \"TimerMillies\""));
495 rc = RTTimerCreate(&pVM->tm.s.pTimer, u32Millies, tmR3TimerCallback, pVM);
496 if (VBOX_FAILURE(rc))
497 {
498 AssertMsgFailed(("Failed to create timer, u32Millies=%d rc=%Vrc.\n", u32Millies, rc));
499 return rc;
500 }
501 Log(("TM: Created timer %p firing every %d millieseconds\n", pVM->tm.s.pTimer, u32Millies));
502 pVM->tm.s.u32TimerMillies = u32Millies;
503
504 /*
505 * Register saved state.
506 */
507 rc = SSMR3RegisterInternal(pVM, "tm", 1, TM_SAVED_STATE_VERSION, sizeof(uint64_t) * 8,
508 NULL, tmR3Save, NULL,
509 NULL, tmR3Load, NULL);
510 if (VBOX_FAILURE(rc))
511 return rc;
512
513 /*
514 * Register statistics.
515 */
516 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).");
517 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).");
518 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).");
519 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).");
520 STAM_REL_REG_USED(pVM,(void*)&pVM->tm.s.VirtualGetRawDataRC.c1nsSteps,STAMTYPE_U32, "/TM/GC/1nsSteps", STAMUNIT_OCCURENCES, "Virtual time 1ns steps (due to TSC / GIP variations).");
521 STAM_REL_REG_USED(pVM,(void*)&pVM->tm.s.VirtualGetRawDataRC.cBadPrev, STAMTYPE_U32, "/TM/GC/cBadPrev", STAMUNIT_OCCURENCES, "Times the previous virtual time was considered erratic (shouldn't ever happen).");
522 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)");
523 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 attemted caught up with.");
524
525#ifdef VBOX_WITH_STATISTICS
526 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).");
527 STAM_REG_USED(pVM,(void *)&pVM->tm.s.VirtualGetRawDataR3.cUpdateRaces,STAMTYPE_U32, "/TM/R3/cUpdateRaces", STAMUNIT_OCCURENCES, "Thread races when updating the previous timestamp.");
528 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).");
529 STAM_REG_USED(pVM,(void *)&pVM->tm.s.VirtualGetRawDataR0.cUpdateRaces,STAMTYPE_U32, "/TM/R0/cUpdateRaces", STAMUNIT_OCCURENCES, "Thread races when updating the previous timestamp.");
530 STAM_REG_USED(pVM,(void *)&pVM->tm.s.VirtualGetRawDataRC.cExpired, STAMTYPE_U32, "/TM/GC/cExpired", STAMUNIT_OCCURENCES, "Times the TSC interval expired (overlaps 1ns steps).");
531 STAM_REG_USED(pVM,(void *)&pVM->tm.s.VirtualGetRawDataRC.cUpdateRaces,STAMTYPE_U32, "/TM/GC/cUpdateRaces", STAMUNIT_OCCURENCES, "Thread races when updating the previous timestamp.");
532 STAM_REG(pVM, &pVM->tm.s.StatDoQueues, STAMTYPE_PROFILE, "/TM/DoQueues", STAMUNIT_TICKS_PER_CALL, "Profiling timer TMR3TimerQueuesDo.");
533 STAM_REG(pVM, &pVM->tm.s.StatDoQueuesSchedule, STAMTYPE_PROFILE_ADV, "/TM/DoQueues/Schedule", STAMUNIT_TICKS_PER_CALL, "The scheduling part.");
534 STAM_REG(pVM, &pVM->tm.s.StatDoQueuesRun, STAMTYPE_PROFILE_ADV, "/TM/DoQueues/Run", STAMUNIT_TICKS_PER_CALL, "The run part.");
535
536 STAM_REG(pVM, &pVM->tm.s.StatPollAlreadySet, STAMTYPE_COUNTER, "/TM/PollAlreadySet", STAMUNIT_OCCURENCES, "TMTimerPoll calls where the FF was already set.");
537 STAM_REG(pVM, &pVM->tm.s.StatPollVirtual, STAMTYPE_COUNTER, "/TM/PollHitsVirtual", STAMUNIT_OCCURENCES, "The number of times TMTimerPoll found an expired TMCLOCK_VIRTUAL queue.");
538 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.");
539 STAM_REG(pVM, &pVM->tm.s.StatPollMiss, STAMTYPE_COUNTER, "/TM/PollMiss", STAMUNIT_OCCURENCES, "TMTimerPoll calls where nothing had expired.");
540
541 STAM_REG(pVM, &pVM->tm.s.StatPostponedR3, STAMTYPE_COUNTER, "/TM/PostponedR3", STAMUNIT_OCCURENCES, "Postponed due to unschedulable state, in ring-3.");
542 STAM_REG(pVM, &pVM->tm.s.StatPostponedRZ, STAMTYPE_COUNTER, "/TM/PostponedRZ", STAMUNIT_OCCURENCES, "Postponed due to unschedulable state, in ring-0 / RC.");
543
544 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.");
545 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.");
546 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.");
547
548 STAM_REG(pVM, &pVM->tm.s.StatTimerSetR3, STAMTYPE_PROFILE, "/TM/TimerSetR3", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerSet calls made in ring-3.");
549 STAM_REG(pVM, &pVM->tm.s.StatTimerSetRZ, STAMTYPE_PROFILE, "/TM/TimerSetRZ", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerSet calls made in ring-0 / RC.");
550
551 STAM_REG(pVM, &pVM->tm.s.StatTimerStopR3, STAMTYPE_PROFILE, "/TM/TimerStopR3", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerStop calls made in ring-3.");
552 STAM_REG(pVM, &pVM->tm.s.StatTimerStopRZ, STAMTYPE_PROFILE, "/TM/TimerStopRZ", STAMUNIT_TICKS_PER_CALL, "Profiling TMTimerStop calls made in ring-0 / RC.");
553
554 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.");
555 STAM_REG(pVM, &pVM->tm.s.StatVirtualGetSetFF, STAMTYPE_COUNTER, "/TM/VirtualGetSetFF", STAMUNIT_OCCURENCES, "Times we set the FF when calling TMTimerGet.");
556 STAM_REG(pVM, &pVM->tm.s.StatVirtualGetSync, STAMTYPE_COUNTER, "/TM/VirtualGetSync", STAMUNIT_OCCURENCES, "The number of times TMTimerGetSync was called when the clock was running.");
557 STAM_REG(pVM, &pVM->tm.s.StatVirtualGetSyncSetFF, STAMTYPE_COUNTER, "/TM/VirtualGetSyncSetFF", STAMUNIT_OCCURENCES, "Times we set the FF when calling TMTimerGetSync.");
558 STAM_REG(pVM, &pVM->tm.s.StatVirtualPause, STAMTYPE_COUNTER, "/TM/VirtualPause", STAMUNIT_OCCURENCES, "The number of times TMR3TimerPause was called.");
559 STAM_REG(pVM, &pVM->tm.s.StatVirtualResume, STAMTYPE_COUNTER, "/TM/VirtualResume", STAMUNIT_OCCURENCES, "The number of times TMR3TimerResume was called.");
560
561 STAM_REG(pVM, &pVM->tm.s.StatTimerCallbackSetFF, STAMTYPE_COUNTER, "/TM/CallbackSetFF", STAMUNIT_OCCURENCES, "The number of times the timer callback set FF.");
562
563 STAM_REG(pVM, &pVM->tm.s.StatTSCCatchupLE010, STAMTYPE_COUNTER, "/TM/TSC/Intercept/CatchupLE010", STAMUNIT_OCCURENCES, "In catch-up mode, 10% or lower.");
564 STAM_REG(pVM, &pVM->tm.s.StatTSCCatchupLE025, STAMTYPE_COUNTER, "/TM/TSC/Intercept/CatchupLE025", STAMUNIT_OCCURENCES, "In catch-up mode, 25%-11%.");
565 STAM_REG(pVM, &pVM->tm.s.StatTSCCatchupLE100, STAMTYPE_COUNTER, "/TM/TSC/Intercept/CatchupLE100", STAMUNIT_OCCURENCES, "In catch-up mode, 100%-26%.");
566 STAM_REG(pVM, &pVM->tm.s.StatTSCCatchupOther, STAMTYPE_COUNTER, "/TM/TSC/Intercept/CatchupOther", STAMUNIT_OCCURENCES, "In catch-up mode, > 100%.");
567 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.");
568 STAM_REG(pVM, &pVM->tm.s.StatTSCNotTicking, STAMTYPE_COUNTER, "/TM/TSC/Intercept/NotTicking", STAMUNIT_OCCURENCES, "TSC is not ticking.");
569 STAM_REG(pVM, &pVM->tm.s.StatTSCSyncNotTicking, STAMTYPE_COUNTER, "/TM/TSC/Intercept/SyncNotTicking", STAMUNIT_OCCURENCES, "VirtualSync isn't ticking.");
570 STAM_REG(pVM, &pVM->tm.s.StatTSCWarp, STAMTYPE_COUNTER, "/TM/TSC/Intercept/Warp", STAMUNIT_OCCURENCES, "Warpdrive is active.");
571
572
573 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.");
574 STAM_REG(pVM, (void *)&pVM->tm.s.fVirtualSyncCatchUp, STAMTYPE_U8, "/TM/VirtualSync/CatchUpActive", STAMUNIT_NONE, "Catch-Up active indicator.");
575 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)");
576 STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncGiveUp, STAMTYPE_COUNTER, "/TM/VirtualSync/GiveUp", STAMUNIT_OCCURENCES, "Times the catch-up was abandoned.");
577 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++.)");
578 STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncRun, STAMTYPE_COUNTER, "/TM/VirtualSync/Run", STAMUNIT_OCCURENCES, "Times the virtual sync timer queue was considered.");
579 STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncRunRestart, STAMTYPE_COUNTER, "/TM/VirtualSync/Run/Restarts", STAMUNIT_OCCURENCES, "Times the clock was restarted after a run.");
580 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.");
581 STAM_REG(pVM, &pVM->tm.s.StatVirtualSyncRunStoppedAlready, STAMTYPE_COUNTER, "/TM/VirtualSync/Run/StoppedAlready", STAMUNIT_OCCURENCES, "Times the clock was already stopped elsewhere (TMVirtualSyncGet).");
582 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.)");
583 for (unsigned i = 0; i < RT_ELEMENTS(pVM->tm.s.aVirtualSyncCatchUpPeriods); i++)
584 {
585 STAMR3RegisterF(pVM, &pVM->tm.s.aVirtualSyncCatchUpPeriods[i].u32Percentage, STAMTYPE_U32, STAMVISIBILITY_ALWAYS, STAMUNIT_PCT, "The catch-up percentage.", "/TM/VirtualSync/Periods/%u", i);
586 STAMR3RegisterF(pVM, &pVM->tm.s.aStatVirtualSyncCatchupAdjust[i], STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Times adjusted to this period.", "/TM/VirtualSync/Periods/%u/Adjust", i);
587 STAMR3RegisterF(pVM, &pVM->tm.s.aStatVirtualSyncCatchupInitial[i], STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Times started in this period.", "/TM/VirtualSync/Periods/%u/Initial", i);
588 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);
589 }
590
591#endif /* VBOX_WITH_STATISTICS */
592
593 /*
594 * Register info handlers.
595 */
596 DBGFR3InfoRegisterInternalEx(pVM, "timers", "Dumps all timers. No arguments.", tmR3TimerInfo, DBGFINFO_FLAGS_RUN_ON_EMT);
597 DBGFR3InfoRegisterInternalEx(pVM, "activetimers", "Dumps active all timers. No arguments.", tmR3TimerInfoActive, DBGFINFO_FLAGS_RUN_ON_EMT);
598 DBGFR3InfoRegisterInternalEx(pVM, "clocks", "Display the time of the various clocks.", tmR3InfoClocks, DBGFINFO_FLAGS_RUN_ON_EMT);
599
600 return VINF_SUCCESS;
601}
602
603
604/**
605 * Initializes the per-VCPU TM.
606 *
607 * @returns VBox status code.
608 * @param pVM The VM to operate on.
609 */
610VMMR3DECL(int) TMR3InitCPU(PVM pVM)
611{
612 LogFlow(("TMR3InitCPU\n"));
613 return VINF_SUCCESS;
614}
615
616
617/**
618 * Checks if the host CPU has a fixed TSC frequency.
619 *
620 * @returns true if it has, false if it hasn't.
621 *
622 * @remark This test doesn't bother with very old CPUs that don't do power
623 * management or any other stuff that might influence the TSC rate.
624 * This isn't currently relevant.
625 */
626static bool tmR3HasFixedTSC(PVM pVM)
627{
628 if (ASMHasCpuId())
629 {
630 uint32_t uEAX, uEBX, uECX, uEDX;
631
632 if (CPUMGetCPUVendor(pVM) == CPUMCPUVENDOR_AMD)
633 {
634 /*
635 * AuthenticAMD - Check for APM support and that TscInvariant is set.
636 *
637 * This test isn't correct with respect to fixed/non-fixed TSC and
638 * older models, but this isn't relevant since the result is currently
639 * only used for making a descision on AMD-V models.
640 */
641 ASMCpuId(0x80000000, &uEAX, &uEBX, &uECX, &uEDX);
642 if (uEAX >= 0x80000007)
643 {
644 PSUPGLOBALINFOPAGE pGip = g_pSUPGlobalInfoPage;
645
646 ASMCpuId(0x80000007, &uEAX, &uEBX, &uECX, &uEDX);
647 if ( (uEDX & X86_CPUID_AMD_ADVPOWER_EDX_TSCINVAR) /* TscInvariant */
648 && pGip->u32Mode == SUPGIPMODE_SYNC_TSC /* no fixed tsc if the gip timer is in async mode */)
649 return true;
650 }
651 }
652 else if (CPUMGetCPUVendor(pVM) == CPUMCPUVENDOR_INTEL)
653 {
654 /*
655 * GenuineIntel - Check the model number.
656 *
657 * This test is lacking in the same way and for the same reasons
658 * as the AMD test above.
659 */
660 ASMCpuId(1, &uEAX, &uEBX, &uECX, &uEDX);
661 unsigned uModel = (uEAX >> 4) & 0x0f;
662 unsigned uFamily = (uEAX >> 8) & 0x0f;
663 if (uFamily == 0x0f)
664 uFamily += (uEAX >> 20) & 0xff;
665 if (uFamily >= 0x06)
666 uModel += ((uEAX >> 16) & 0x0f) << 4;
667 if ( (uFamily == 0x0f /*P4*/ && uModel >= 0x03)
668 || (uFamily == 0x06 /*P2/P3*/ && uModel >= 0x0e))
669 return true;
670 }
671 }
672 return false;
673}
674
675
676/**
677 * Calibrate the CPU tick.
678 *
679 * @returns Number of ticks per second.
680 */
681static uint64_t tmR3CalibrateTSC(PVM pVM)
682{
683 /*
684 * Use GIP when available present.
685 */
686 uint64_t u64Hz;
687 PSUPGLOBALINFOPAGE pGip = g_pSUPGlobalInfoPage;
688 if ( pGip
689 && pGip->u32Magic == SUPGLOBALINFOPAGE_MAGIC)
690 {
691 unsigned iCpu = pGip->u32Mode != SUPGIPMODE_ASYNC_TSC ? 0 : ASMGetApicId();
692 if (iCpu >= RT_ELEMENTS(pGip->aCPUs))
693 AssertReleaseMsgFailed(("iCpu=%d - the ApicId is too high. send VBox.log and hardware specs!\n", iCpu));
694 else
695 {
696 if (tmR3HasFixedTSC(pVM))
697 /* Sleep a bit to get a more reliable CpuHz value. */
698 RTThreadSleep(32);
699 else
700 {
701 /* Spin for 40ms to try push up the CPU frequency and get a more reliable CpuHz value. */
702 const uint64_t u64 = RTTimeMilliTS();
703 while ((RTTimeMilliTS() - u64) < 40 /*ms*/)
704 /* nothing */;
705 }
706
707 pGip = g_pSUPGlobalInfoPage;
708 if ( pGip
709 && pGip->u32Magic == SUPGLOBALINFOPAGE_MAGIC
710 && (u64Hz = pGip->aCPUs[iCpu].u64CpuHz)
711 && u64Hz != ~(uint64_t)0)
712 return u64Hz;
713 }
714 }
715
716 /* call this once first to make sure it's initialized. */
717 RTTimeNanoTS();
718
719 /*
720 * Yield the CPU to increase our chances of getting
721 * a correct value.
722 */
723 RTThreadYield(); /* Try avoid interruptions between TSC and NanoTS samplings. */
724 static const unsigned s_auSleep[5] = { 50, 30, 30, 40, 40 };
725 uint64_t au64Samples[5];
726 unsigned i;
727 for (i = 0; i < RT_ELEMENTS(au64Samples); i++)
728 {
729 unsigned cMillies;
730 int cTries = 5;
731 uint64_t u64Start = ASMReadTSC();
732 uint64_t u64End;
733 uint64_t StartTS = RTTimeNanoTS();
734 uint64_t EndTS;
735 do
736 {
737 RTThreadSleep(s_auSleep[i]);
738 u64End = ASMReadTSC();
739 EndTS = RTTimeNanoTS();
740 cMillies = (unsigned)((EndTS - StartTS + 500000) / 1000000);
741 } while ( cMillies == 0 /* the sleep may be interrupted... */
742 || (cMillies < 20 && --cTries > 0));
743 uint64_t u64Diff = u64End - u64Start;
744
745 au64Samples[i] = (u64Diff * 1000) / cMillies;
746 AssertMsg(cTries > 0, ("cMillies=%d i=%d\n", cMillies, i));
747 }
748
749 /*
750 * Discard the highest and lowest results and calculate the average.
751 */
752 unsigned iHigh = 0;
753 unsigned iLow = 0;
754 for (i = 1; i < RT_ELEMENTS(au64Samples); i++)
755 {
756 if (au64Samples[i] < au64Samples[iLow])
757 iLow = i;
758 if (au64Samples[i] > au64Samples[iHigh])
759 iHigh = i;
760 }
761 au64Samples[iLow] = 0;
762 au64Samples[iHigh] = 0;
763
764 u64Hz = au64Samples[0];
765 for (i = 1; i < RT_ELEMENTS(au64Samples); i++)
766 u64Hz += au64Samples[i];
767 u64Hz /= RT_ELEMENTS(au64Samples) - 2;
768
769 return u64Hz;
770}
771
772
773/**
774 * Finalizes the TM initialization.
775 *
776 * @returns VBox status code.
777 * @param pVM The VM to operate on.
778 */
779VMMR3DECL(int) TMR3InitFinalize(PVM pVM)
780{
781 int rc;
782
783 rc = PDMR3LdrGetSymbolRCLazy(pVM, NULL, "tmVirtualNanoTSBad", &pVM->tm.s.VirtualGetRawDataRC.pfnBad);
784 AssertRCReturn(rc, rc);
785 rc = PDMR3LdrGetSymbolRCLazy(pVM, NULL, "tmVirtualNanoTSRediscover", &pVM->tm.s.VirtualGetRawDataRC.pfnRediscover);
786 AssertRCReturn(rc, rc);
787 if (pVM->tm.s.pfnVirtualGetRawR3 == RTTimeNanoTSLFenceSync)
788 rc = PDMR3LdrGetSymbolRCLazy(pVM, NULL, "RTTimeNanoTSLFenceSync", &pVM->tm.s.pfnVirtualGetRawRC);
789 else if (pVM->tm.s.pfnVirtualGetRawR3 == RTTimeNanoTSLFenceAsync)
790 rc = PDMR3LdrGetSymbolRCLazy(pVM, NULL, "RTTimeNanoTSLFenceAsync", &pVM->tm.s.pfnVirtualGetRawRC);
791 else if (pVM->tm.s.pfnVirtualGetRawR3 == RTTimeNanoTSLegacySync)
792 rc = PDMR3LdrGetSymbolRCLazy(pVM, NULL, "RTTimeNanoTSLegacySync", &pVM->tm.s.pfnVirtualGetRawRC);
793 else if (pVM->tm.s.pfnVirtualGetRawR3 == RTTimeNanoTSLegacyAsync)
794 rc = PDMR3LdrGetSymbolRCLazy(pVM, NULL, "RTTimeNanoTSLegacyAsync", &pVM->tm.s.pfnVirtualGetRawRC);
795 else
796 AssertFatalFailed();
797 AssertRCReturn(rc, rc);
798
799 rc = PDMR3LdrGetSymbolR0Lazy(pVM, NULL, "tmVirtualNanoTSBad", &pVM->tm.s.VirtualGetRawDataR0.pfnBad);
800 AssertRCReturn(rc, rc);
801 rc = PDMR3LdrGetSymbolR0Lazy(pVM, NULL, "tmVirtualNanoTSRediscover", &pVM->tm.s.VirtualGetRawDataR0.pfnRediscover);
802 AssertRCReturn(rc, rc);
803 if (pVM->tm.s.pfnVirtualGetRawR3 == RTTimeNanoTSLFenceSync)
804 rc = PDMR3LdrGetSymbolR0Lazy(pVM, NULL, "RTTimeNanoTSLFenceSync", &pVM->tm.s.pfnVirtualGetRawR0);
805 else if (pVM->tm.s.pfnVirtualGetRawR3 == RTTimeNanoTSLFenceAsync)
806 rc = PDMR3LdrGetSymbolR0Lazy(pVM, NULL, "RTTimeNanoTSLFenceAsync", &pVM->tm.s.pfnVirtualGetRawR0);
807 else if (pVM->tm.s.pfnVirtualGetRawR3 == RTTimeNanoTSLegacySync)
808 rc = PDMR3LdrGetSymbolR0Lazy(pVM, NULL, "RTTimeNanoTSLegacySync", &pVM->tm.s.pfnVirtualGetRawR0);
809 else if (pVM->tm.s.pfnVirtualGetRawR3 == RTTimeNanoTSLegacyAsync)
810 rc = PDMR3LdrGetSymbolR0Lazy(pVM, NULL, "RTTimeNanoTSLegacyAsync", &pVM->tm.s.pfnVirtualGetRawR0);
811 else
812 AssertFatalFailed();
813 AssertRCReturn(rc, rc);
814
815 return VINF_SUCCESS;
816}
817
818
819/**
820 * Applies relocations to data and code managed by this
821 * component. This function will be called at init and
822 * whenever the VMM need to relocate it self inside the GC.
823 *
824 * @param pVM The VM.
825 * @param offDelta Relocation delta relative to old location.
826 */
827VMMR3DECL(void) TMR3Relocate(PVM pVM, RTGCINTPTR offDelta)
828{
829 int rc;
830 LogFlow(("TMR3Relocate\n"));
831
832 pVM->tm.s.pvGIPRC = MMHyperR3ToRC(pVM, pVM->tm.s.pvGIPR3);
833 pVM->tm.s.paTimerQueuesRC = MMHyperR3ToRC(pVM, pVM->tm.s.paTimerQueuesR3);
834 pVM->tm.s.paTimerQueuesR0 = MMHyperR3ToR0(pVM, pVM->tm.s.paTimerQueuesR3);
835
836 pVM->tm.s.VirtualGetRawDataRC.pu64Prev = MMHyperR3ToRC(pVM, (void *)&pVM->tm.s.u64VirtualRawPrev);
837 AssertFatal(pVM->tm.s.VirtualGetRawDataRC.pu64Prev);
838 rc = PDMR3LdrGetSymbolRCLazy(pVM, NULL, "tmVirtualNanoTSBad", &pVM->tm.s.VirtualGetRawDataRC.pfnBad);
839 AssertFatalRC(rc);
840 rc = PDMR3LdrGetSymbolRCLazy(pVM, NULL, "tmVirtualNanoTSRediscover", &pVM->tm.s.VirtualGetRawDataRC.pfnRediscover);
841 AssertFatalRC(rc);
842
843 if (pVM->tm.s.pfnVirtualGetRawR3 == RTTimeNanoTSLFenceSync)
844 rc = PDMR3LdrGetSymbolRCLazy(pVM, NULL, "RTTimeNanoTSLFenceSync", &pVM->tm.s.pfnVirtualGetRawRC);
845 else if (pVM->tm.s.pfnVirtualGetRawR3 == RTTimeNanoTSLFenceAsync)
846 rc = PDMR3LdrGetSymbolRCLazy(pVM, NULL, "RTTimeNanoTSLFenceAsync", &pVM->tm.s.pfnVirtualGetRawRC);
847 else if (pVM->tm.s.pfnVirtualGetRawR3 == RTTimeNanoTSLegacySync)
848 rc = PDMR3LdrGetSymbolRCLazy(pVM, NULL, "RTTimeNanoTSLegacySync", &pVM->tm.s.pfnVirtualGetRawRC);
849 else if (pVM->tm.s.pfnVirtualGetRawR3 == RTTimeNanoTSLegacyAsync)
850 rc = PDMR3LdrGetSymbolRCLazy(pVM, NULL, "RTTimeNanoTSLegacyAsync", &pVM->tm.s.pfnVirtualGetRawRC);
851 else
852 AssertFatalFailed();
853 AssertFatalRC(rc);
854
855 /*
856 * Iterate the timers updating the pVMGC pointers.
857 */
858 for (PTMTIMER pTimer = pVM->tm.s.pCreated; pTimer; pTimer = pTimer->pBigNext)
859 {
860 pTimer->pVMRC = pVM->pVMRC;
861 pTimer->pVMR0 = pVM->pVMR0;
862 }
863}
864
865
866/**
867 * Terminates the TM.
868 *
869 * Termination means cleaning up and freeing all resources,
870 * the VM it self is at this point powered off or suspended.
871 *
872 * @returns VBox status code.
873 * @param pVM The VM to operate on.
874 */
875VMMR3DECL(int) TMR3Term(PVM pVM)
876{
877 AssertMsg(pVM->tm.s.offVM, ("bad init order!\n"));
878 if (pVM->tm.s.pTimer)
879 {
880 int rc = RTTimerDestroy(pVM->tm.s.pTimer);
881 AssertRC(rc);
882 pVM->tm.s.pTimer = NULL;
883 }
884
885 return VINF_SUCCESS;
886}
887
888
889/**
890 * Terminates the per-VCPU TM.
891 *
892 * Termination means cleaning up and freeing all resources,
893 * the VM it self is at this point powered off or suspended.
894 *
895 * @returns VBox status code.
896 * @param pVM The VM to operate on.
897 */
898VMMR3DECL(int) TMR3TermCPU(PVM pVM)
899{
900 return 0;
901}
902
903
904/**
905 * The VM is being reset.
906 *
907 * For the TM component this means that a rescheduling is preformed,
908 * the FF is cleared and but without running the queues. We'll have to
909 * check if this makes sense or not, but it seems like a good idea now....
910 *
911 * @param pVM VM handle.
912 */
913VMMR3DECL(void) TMR3Reset(PVM pVM)
914{
915 LogFlow(("TMR3Reset:\n"));
916 VM_ASSERT_EMT(pVM);
917
918 /*
919 * Abort any pending catch up.
920 * This isn't perfect,
921 */
922 if (pVM->tm.s.fVirtualSyncCatchUp)
923 {
924 const uint64_t offVirtualNow = TMVirtualGetEx(pVM, false /* don't check timers */);
925 const uint64_t offVirtualSyncNow = TMVirtualSyncGetEx(pVM, false /* don't check timers */);
926 if (pVM->tm.s.fVirtualSyncCatchUp)
927 {
928 STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatVirtualSyncCatchup, c);
929
930 const uint64_t offOld = pVM->tm.s.offVirtualSyncGivenUp;
931 const uint64_t offNew = offVirtualNow - offVirtualSyncNow;
932 Assert(offOld <= offNew);
933 ASMAtomicXchgU64((uint64_t volatile *)&pVM->tm.s.offVirtualSyncGivenUp, offNew);
934 ASMAtomicXchgU64((uint64_t volatile *)&pVM->tm.s.offVirtualSync, offNew);
935 ASMAtomicXchgBool(&pVM->tm.s.fVirtualSyncCatchUp, false);
936 LogRel(("TM: Aborting catch-up attempt on reset with a %RU64 ns lag on reset; new total: %RU64 ns\n", offNew - offOld, offNew));
937 }
938 }
939
940 /*
941 * Process the queues.
942 */
943 for (int i = 0; i < TMCLOCK_MAX; i++)
944 tmTimerQueueSchedule(pVM, &pVM->tm.s.paTimerQueuesR3[i]);
945#ifdef VBOX_STRICT
946 tmTimerQueuesSanityChecks(pVM, "TMR3Reset");
947#endif
948 VM_FF_CLEAR(pVM, VM_FF_TIMER);
949}
950
951
952/**
953 * Resolve a builtin RC symbol.
954 * Called by PDM when loading or relocating GC modules.
955 *
956 * @returns VBox status
957 * @param pVM VM Handle.
958 * @param pszSymbol Symbol to resolve.
959 * @param pRCPtrValue Where to store the symbol value.
960 * @remark This has to work before TMR3Relocate() is called.
961 */
962VMMR3DECL(int) TMR3GetImportRC(PVM pVM, const char *pszSymbol, PRTRCPTR pRCPtrValue)
963{
964 if (!strcmp(pszSymbol, "g_pSUPGlobalInfoPage"))
965 *pRCPtrValue = MMHyperR3ToRC(pVM, &pVM->tm.s.pvGIPRC);
966 //else if (..)
967 else
968 return VERR_SYMBOL_NOT_FOUND;
969 return VINF_SUCCESS;
970}
971
972
973/**
974 * Execute state save operation.
975 *
976 * @returns VBox status code.
977 * @param pVM VM Handle.
978 * @param pSSM SSM operation handle.
979 */
980static DECLCALLBACK(int) tmR3Save(PVM pVM, PSSMHANDLE pSSM)
981{
982 LogFlow(("tmR3Save:\n"));
983 Assert(!pVM->tm.s.fTSCTicking);
984 Assert(!pVM->tm.s.fVirtualTicking);
985 Assert(!pVM->tm.s.fVirtualSyncTicking);
986
987 /*
988 * Save the virtual clocks.
989 */
990 /* the virtual clock. */
991 SSMR3PutU64(pSSM, TMCLOCK_FREQ_VIRTUAL);
992 SSMR3PutU64(pSSM, pVM->tm.s.u64Virtual);
993
994 /* the virtual timer synchronous clock. */
995 SSMR3PutU64(pSSM, pVM->tm.s.u64VirtualSync);
996 SSMR3PutU64(pSSM, pVM->tm.s.offVirtualSync);
997 SSMR3PutU64(pSSM, pVM->tm.s.offVirtualSyncGivenUp);
998 SSMR3PutU64(pSSM, pVM->tm.s.u64VirtualSyncCatchUpPrev);
999 SSMR3PutBool(pSSM, pVM->tm.s.fVirtualSyncCatchUp);
1000
1001 /* real time clock */
1002 SSMR3PutU64(pSSM, TMCLOCK_FREQ_REAL);
1003
1004 /* the cpu tick clock. */
1005 SSMR3PutU64(pSSM, TMCpuTickGet(pVM));
1006 return SSMR3PutU64(pSSM, pVM->tm.s.cTSCTicksPerSecond);
1007}
1008
1009
1010/**
1011 * Execute state load operation.
1012 *
1013 * @returns VBox status code.
1014 * @param pVM VM Handle.
1015 * @param pSSM SSM operation handle.
1016 * @param u32Version Data layout version.
1017 */
1018static DECLCALLBACK(int) tmR3Load(PVM pVM, PSSMHANDLE pSSM, uint32_t u32Version)
1019{
1020 LogFlow(("tmR3Load:\n"));
1021 Assert(!pVM->tm.s.fTSCTicking);
1022 Assert(!pVM->tm.s.fVirtualTicking);
1023 Assert(!pVM->tm.s.fVirtualSyncTicking);
1024
1025 /*
1026 * Validate version.
1027 */
1028 if (u32Version != TM_SAVED_STATE_VERSION)
1029 {
1030 AssertMsgFailed(("tmR3Load: Invalid version u32Version=%d!\n", u32Version));
1031 return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
1032 }
1033
1034 /*
1035 * Load the virtual clock.
1036 */
1037 pVM->tm.s.fVirtualTicking = false;
1038 /* the virtual clock. */
1039 uint64_t u64Hz;
1040 int rc = SSMR3GetU64(pSSM, &u64Hz);
1041 if (VBOX_FAILURE(rc))
1042 return rc;
1043 if (u64Hz != TMCLOCK_FREQ_VIRTUAL)
1044 {
1045 AssertMsgFailed(("The virtual clock frequency differs! Saved: %RU64 Binary: %RU64\n",
1046 u64Hz, TMCLOCK_FREQ_VIRTUAL));
1047 return VERR_SSM_VIRTUAL_CLOCK_HZ;
1048 }
1049 SSMR3GetU64(pSSM, &pVM->tm.s.u64Virtual);
1050 pVM->tm.s.u64VirtualOffset = 0;
1051
1052 /* the virtual timer synchronous clock. */
1053 pVM->tm.s.fVirtualSyncTicking = false;
1054 uint64_t u64;
1055 SSMR3GetU64(pSSM, &u64);
1056 pVM->tm.s.u64VirtualSync = u64;
1057 SSMR3GetU64(pSSM, &u64);
1058 pVM->tm.s.offVirtualSync = u64;
1059 SSMR3GetU64(pSSM, &u64);
1060 pVM->tm.s.offVirtualSyncGivenUp = u64;
1061 SSMR3GetU64(pSSM, &u64);
1062 pVM->tm.s.u64VirtualSyncCatchUpPrev = u64;
1063 bool f;
1064 SSMR3GetBool(pSSM, &f);
1065 pVM->tm.s.fVirtualSyncCatchUp = f;
1066
1067 /* the real clock */
1068 rc = SSMR3GetU64(pSSM, &u64Hz);
1069 if (VBOX_FAILURE(rc))
1070 return rc;
1071 if (u64Hz != TMCLOCK_FREQ_REAL)
1072 {
1073 AssertMsgFailed(("The real clock frequency differs! Saved: %RU64 Binary: %RU64\n",
1074 u64Hz, TMCLOCK_FREQ_REAL));
1075 return VERR_SSM_VIRTUAL_CLOCK_HZ; /* missleading... */
1076 }
1077
1078 /* the cpu tick clock. */
1079 pVM->tm.s.fTSCTicking = false;
1080 SSMR3GetU64(pSSM, &pVM->tm.s.u64TSC);
1081 rc = SSMR3GetU64(pSSM, &u64Hz);
1082 if (VBOX_FAILURE(rc))
1083 return rc;
1084 if (pVM->tm.s.fTSCUseRealTSC)
1085 pVM->tm.s.u64TSCOffset = 0; /** @todo TSC restore stuff and HWACC. */
1086 else
1087 pVM->tm.s.cTSCTicksPerSecond = u64Hz;
1088 LogRel(("TM: cTSCTicksPerSecond=%#RX64 (%RU64) fTSCVirtualized=%RTbool fTSCUseRealTSC=%RTbool (state load)\n",
1089 pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.cTSCTicksPerSecond, pVM->tm.s.fTSCVirtualized, pVM->tm.s.fTSCUseRealTSC));
1090
1091 /*
1092 * Make sure timers get rescheduled immediately.
1093 */
1094 VM_FF_SET(pVM, VM_FF_TIMER);
1095
1096 return VINF_SUCCESS;
1097}
1098
1099
1100/**
1101 * Internal TMR3TimerCreate worker.
1102 *
1103 * @returns VBox status code.
1104 * @param pVM The VM handle.
1105 * @param enmClock The timer clock.
1106 * @param pszDesc The timer description.
1107 * @param ppTimer Where to store the timer pointer on success.
1108 */
1109static int tmr3TimerCreate(PVM pVM, TMCLOCK enmClock, const char *pszDesc, PPTMTIMERR3 ppTimer)
1110{
1111 VM_ASSERT_EMT(pVM);
1112
1113 /*
1114 * Allocate the timer.
1115 */
1116 PTMTIMERR3 pTimer = NULL;
1117 if (pVM->tm.s.pFree && VM_IS_EMT(pVM))
1118 {
1119 pTimer = pVM->tm.s.pFree;
1120 pVM->tm.s.pFree = pTimer->pBigNext;
1121 Log3(("TM: Recycling timer %p, new free head %p.\n", pTimer, pTimer->pBigNext));
1122 }
1123
1124 if (!pTimer)
1125 {
1126 int rc = MMHyperAlloc(pVM, sizeof(*pTimer), 0, MM_TAG_TM, (void **)&pTimer);
1127 if (VBOX_FAILURE(rc))
1128 return rc;
1129 Log3(("TM: Allocated new timer %p\n", pTimer));
1130 }
1131
1132 /*
1133 * Initialize it.
1134 */
1135 pTimer->u64Expire = 0;
1136 pTimer->enmClock = enmClock;
1137 pTimer->pVMR3 = pVM;
1138 pTimer->pVMR0 = pVM->pVMR0;
1139 pTimer->pVMRC = pVM->pVMRC;
1140 pTimer->enmState = TMTIMERSTATE_STOPPED;
1141 pTimer->offScheduleNext = 0;
1142 pTimer->offNext = 0;
1143 pTimer->offPrev = 0;
1144 pTimer->pszDesc = pszDesc;
1145
1146 /* insert into the list of created timers. */
1147 pTimer->pBigPrev = NULL;
1148 pTimer->pBigNext = pVM->tm.s.pCreated;
1149 pVM->tm.s.pCreated = pTimer;
1150 if (pTimer->pBigNext)
1151 pTimer->pBigNext->pBigPrev = pTimer;
1152#ifdef VBOX_STRICT
1153 tmTimerQueuesSanityChecks(pVM, "tmR3TimerCreate");
1154#endif
1155
1156 *ppTimer = pTimer;
1157 return VINF_SUCCESS;
1158}
1159
1160
1161/**
1162 * Creates a device timer.
1163 *
1164 * @returns VBox status.
1165 * @param pVM The VM to create the timer in.
1166 * @param pDevIns Device instance.
1167 * @param enmClock The clock to use on this timer.
1168 * @param pfnCallback Callback function.
1169 * @param pszDesc Pointer to description string which must stay around
1170 * until the timer is fully destroyed (i.e. a bit after TMTimerDestroy()).
1171 * @param ppTimer Where to store the timer on success.
1172 */
1173VMMR3DECL(int) TMR3TimerCreateDevice(PVM pVM, PPDMDEVINS pDevIns, TMCLOCK enmClock, PFNTMTIMERDEV pfnCallback, const char *pszDesc, PPTMTIMERR3 ppTimer)
1174{
1175 /*
1176 * Allocate and init stuff.
1177 */
1178 int rc = tmr3TimerCreate(pVM, enmClock, pszDesc, ppTimer);
1179 if (VBOX_SUCCESS(rc))
1180 {
1181 (*ppTimer)->enmType = TMTIMERTYPE_DEV;
1182 (*ppTimer)->u.Dev.pfnTimer = pfnCallback;
1183 (*ppTimer)->u.Dev.pDevIns = pDevIns;
1184 Log(("TM: Created device timer %p clock %d callback %p '%s'\n", (*ppTimer), enmClock, pfnCallback, pszDesc));
1185 }
1186
1187 return rc;
1188}
1189
1190
1191/**
1192 * Creates a driver timer.
1193 *
1194 * @returns VBox status.
1195 * @param pVM The VM to create the timer in.
1196 * @param pDrvIns Driver instance.
1197 * @param enmClock The clock to use on this timer.
1198 * @param pfnCallback Callback function.
1199 * @param pszDesc Pointer to description string which must stay around
1200 * until the timer is fully destroyed (i.e. a bit after TMTimerDestroy()).
1201 * @param ppTimer Where to store the timer on success.
1202 */
1203VMMR3DECL(int) TMR3TimerCreateDriver(PVM pVM, PPDMDRVINS pDrvIns, TMCLOCK enmClock, PFNTMTIMERDRV pfnCallback, const char *pszDesc, PPTMTIMERR3 ppTimer)
1204{
1205 /*
1206 * Allocate and init stuff.
1207 */
1208 int rc = tmr3TimerCreate(pVM, enmClock, pszDesc, ppTimer);
1209 if (VBOX_SUCCESS(rc))
1210 {
1211 (*ppTimer)->enmType = TMTIMERTYPE_DRV;
1212 (*ppTimer)->u.Drv.pfnTimer = pfnCallback;
1213 (*ppTimer)->u.Drv.pDrvIns = pDrvIns;
1214 Log(("TM: Created device timer %p clock %d callback %p '%s'\n", (*ppTimer), enmClock, pfnCallback, pszDesc));
1215 }
1216
1217 return rc;
1218}
1219
1220
1221/**
1222 * Creates an internal timer.
1223 *
1224 * @returns VBox status.
1225 * @param pVM The VM to create the timer in.
1226 * @param enmClock The clock to use on this timer.
1227 * @param pfnCallback Callback function.
1228 * @param pvUser User argument to be passed to the callback.
1229 * @param pszDesc Pointer to description string which must stay around
1230 * until the timer is fully destroyed (i.e. a bit after TMTimerDestroy()).
1231 * @param ppTimer Where to store the timer on success.
1232 */
1233VMMR3DECL(int) TMR3TimerCreateInternal(PVM pVM, TMCLOCK enmClock, PFNTMTIMERINT pfnCallback, void *pvUser, const char *pszDesc, PPTMTIMERR3 ppTimer)
1234{
1235 /*
1236 * Allocate and init stuff.
1237 */
1238 PTMTIMER pTimer;
1239 int rc = tmr3TimerCreate(pVM, enmClock, pszDesc, &pTimer);
1240 if (VBOX_SUCCESS(rc))
1241 {
1242 pTimer->enmType = TMTIMERTYPE_INTERNAL;
1243 pTimer->u.Internal.pfnTimer = pfnCallback;
1244 pTimer->u.Internal.pvUser = pvUser;
1245 *ppTimer = pTimer;
1246 Log(("TM: Created internal timer %p clock %d callback %p '%s'\n", pTimer, enmClock, pfnCallback, pszDesc));
1247 }
1248
1249 return rc;
1250}
1251
1252/**
1253 * Creates an external timer.
1254 *
1255 * @returns Timer handle on success.
1256 * @returns NULL on failure.
1257 * @param pVM The VM to create the timer in.
1258 * @param enmClock The clock to use on this timer.
1259 * @param pfnCallback Callback function.
1260 * @param pvUser User argument.
1261 * @param pszDesc Pointer to description string which must stay around
1262 * until the timer is fully destroyed (i.e. a bit after TMTimerDestroy()).
1263 */
1264VMMR3DECL(PTMTIMERR3) TMR3TimerCreateExternal(PVM pVM, TMCLOCK enmClock, PFNTMTIMEREXT pfnCallback, void *pvUser, const char *pszDesc)
1265{
1266 /*
1267 * Allocate and init stuff.
1268 */
1269 PTMTIMERR3 pTimer;
1270 int rc = tmr3TimerCreate(pVM, enmClock, pszDesc, &pTimer);
1271 if (VBOX_SUCCESS(rc))
1272 {
1273 pTimer->enmType = TMTIMERTYPE_EXTERNAL;
1274 pTimer->u.External.pfnTimer = pfnCallback;
1275 pTimer->u.External.pvUser = pvUser;
1276 Log(("TM: Created external timer %p clock %d callback %p '%s'\n", pTimer, enmClock, pfnCallback, pszDesc));
1277 return pTimer;
1278 }
1279
1280 return NULL;
1281}
1282
1283
1284/**
1285 * Destroy all timers owned by a device.
1286 *
1287 * @returns VBox status.
1288 * @param pVM VM handle.
1289 * @param pDevIns Device which timers should be destroyed.
1290 */
1291VMMR3DECL(int) TMR3TimerDestroyDevice(PVM pVM, PPDMDEVINS pDevIns)
1292{
1293 LogFlow(("TMR3TimerDestroyDevice: pDevIns=%p\n", pDevIns));
1294 if (!pDevIns)
1295 return VERR_INVALID_PARAMETER;
1296
1297 PTMTIMER pCur = pVM->tm.s.pCreated;
1298 while (pCur)
1299 {
1300 PTMTIMER pDestroy = pCur;
1301 pCur = pDestroy->pBigNext;
1302 if ( pDestroy->enmType == TMTIMERTYPE_DEV
1303 && pDestroy->u.Dev.pDevIns == pDevIns)
1304 {
1305 int rc = TMTimerDestroy(pDestroy);
1306 AssertRC(rc);
1307 }
1308 }
1309 LogFlow(("TMR3TimerDestroyDevice: returns VINF_SUCCESS\n"));
1310 return VINF_SUCCESS;
1311}
1312
1313
1314/**
1315 * Destroy all timers owned by a driver.
1316 *
1317 * @returns VBox status.
1318 * @param pVM VM handle.
1319 * @param pDrvIns Driver which timers should be destroyed.
1320 */
1321VMMR3DECL(int) TMR3TimerDestroyDriver(PVM pVM, PPDMDRVINS pDrvIns)
1322{
1323 LogFlow(("TMR3TimerDestroyDriver: pDrvIns=%p\n", pDrvIns));
1324 if (!pDrvIns)
1325 return VERR_INVALID_PARAMETER;
1326
1327 PTMTIMER pCur = pVM->tm.s.pCreated;
1328 while (pCur)
1329 {
1330 PTMTIMER pDestroy = pCur;
1331 pCur = pDestroy->pBigNext;
1332 if ( pDestroy->enmType == TMTIMERTYPE_DRV
1333 && pDestroy->u.Drv.pDrvIns == pDrvIns)
1334 {
1335 int rc = TMTimerDestroy(pDestroy);
1336 AssertRC(rc);
1337 }
1338 }
1339 LogFlow(("TMR3TimerDestroyDriver: returns VINF_SUCCESS\n"));
1340 return VINF_SUCCESS;
1341}
1342
1343
1344/**
1345 * Internal function for getting the clock time.
1346 *
1347 * @returns clock time.
1348 * @param pVM The VM handle.
1349 * @param enmClock The clock.
1350 */
1351DECLINLINE(uint64_t) tmClock(PVM pVM, TMCLOCK enmClock)
1352{
1353 switch (enmClock)
1354 {
1355 case TMCLOCK_VIRTUAL: return TMVirtualGet(pVM);
1356 case TMCLOCK_VIRTUAL_SYNC: return TMVirtualSyncGet(pVM);
1357 case TMCLOCK_REAL: return TMRealGet(pVM);
1358 case TMCLOCK_TSC: return TMCpuTickGet(pVM);
1359 default:
1360 AssertMsgFailed(("enmClock=%d\n", enmClock));
1361 return ~(uint64_t)0;
1362 }
1363}
1364
1365
1366/**
1367 * Checks if the sync queue has one or more expired timers.
1368 *
1369 * @returns true / false.
1370 *
1371 * @param pVM The VM handle.
1372 * @param enmClock The queue.
1373 */
1374DECLINLINE(bool) tmR3HasExpiredTimer(PVM pVM, TMCLOCK enmClock)
1375{
1376 const uint64_t u64Expire = pVM->tm.s.CTX_SUFF(paTimerQueues)[enmClock].u64Expire;
1377 return u64Expire != INT64_MAX && u64Expire <= tmClock(pVM, enmClock);
1378}
1379
1380
1381/**
1382 * Checks for expired timers in all the queues.
1383 *
1384 * @returns true / false.
1385 * @param pVM The VM handle.
1386 */
1387DECLINLINE(bool) tmR3AnyExpiredTimers(PVM pVM)
1388{
1389 /*
1390 * Combine the time calculation for the first two since we're not on EMT
1391 * TMVirtualSyncGet only permits EMT.
1392 */
1393 uint64_t u64Now = TMVirtualGet(pVM);
1394 if (pVM->tm.s.CTX_SUFF(paTimerQueues)[TMCLOCK_VIRTUAL].u64Expire <= u64Now)
1395 return true;
1396 u64Now = pVM->tm.s.fVirtualSyncTicking
1397 ? u64Now - pVM->tm.s.offVirtualSync
1398 : pVM->tm.s.u64VirtualSync;
1399 if (pVM->tm.s.CTX_SUFF(paTimerQueues)[TMCLOCK_VIRTUAL_SYNC].u64Expire <= u64Now)
1400 return true;
1401
1402 /*
1403 * The remaining timers.
1404 */
1405 if (tmR3HasExpiredTimer(pVM, TMCLOCK_REAL))
1406 return true;
1407 if (tmR3HasExpiredTimer(pVM, TMCLOCK_TSC))
1408 return true;
1409 return false;
1410}
1411
1412
1413/**
1414 * Schedulation timer callback.
1415 *
1416 * @param pTimer Timer handle.
1417 * @param pvUser VM handle.
1418 * @thread Timer thread.
1419 *
1420 * @remark We cannot do the scheduling and queues running from a timer handler
1421 * since it's not executing in EMT, and even if it was it would be async
1422 * and we wouldn't know the state of the affairs.
1423 * So, we'll just raise the timer FF and force any REM execution to exit.
1424 */
1425static DECLCALLBACK(void) tmR3TimerCallback(PRTTIMER pTimer, void *pvUser, uint64_t /*iTick*/)
1426{
1427 PVM pVM = (PVM)pvUser;
1428 AssertCompile(TMCLOCK_MAX == 4);
1429#ifdef DEBUG_Sander /* very annoying, keep it private. */
1430 if (VM_FF_ISSET(pVM, VM_FF_TIMER))
1431 Log(("tmR3TimerCallback: timer event still pending!!\n"));
1432#endif
1433 if ( !VM_FF_ISSET(pVM, VM_FF_TIMER)
1434 && ( pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL_SYNC].offSchedule
1435 || pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL].offSchedule
1436 || pVM->tm.s.paTimerQueuesR3[TMCLOCK_REAL].offSchedule
1437 || pVM->tm.s.paTimerQueuesR3[TMCLOCK_TSC].offSchedule
1438 || tmR3AnyExpiredTimers(pVM)
1439 )
1440 && !VM_FF_ISSET(pVM, VM_FF_TIMER)
1441 )
1442 {
1443 VM_FF_SET(pVM, VM_FF_TIMER);
1444 REMR3NotifyTimerPending(pVM);
1445 VMR3NotifyFF(pVM, true);
1446 STAM_COUNTER_INC(&pVM->tm.s.StatTimerCallbackSetFF);
1447 }
1448}
1449
1450
1451/**
1452 * Schedules and runs any pending timers.
1453 *
1454 * This is normally called from a forced action handler in EMT.
1455 *
1456 * @param pVM The VM to run the timers for.
1457 */
1458VMMR3DECL(void) TMR3TimerQueuesDo(PVM pVM)
1459{
1460 STAM_PROFILE_START(&pVM->tm.s.StatDoQueues, a);
1461 Log2(("TMR3TimerQueuesDo:\n"));
1462
1463 /*
1464 * Process the queues.
1465 */
1466 AssertCompile(TMCLOCK_MAX == 4);
1467
1468 /* TMCLOCK_VIRTUAL_SYNC */
1469 STAM_PROFILE_ADV_START(&pVM->tm.s.StatDoQueuesSchedule, s1);
1470 tmTimerQueueSchedule(pVM, &pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL_SYNC]);
1471 STAM_PROFILE_ADV_SUSPEND(&pVM->tm.s.StatDoQueuesSchedule, s1);
1472 STAM_PROFILE_ADV_START(&pVM->tm.s.StatDoQueuesRun, r1);
1473 tmR3TimerQueueRunVirtualSync(pVM);
1474 STAM_PROFILE_ADV_SUSPEND(&pVM->tm.s.StatDoQueuesRun, r1);
1475
1476 /* TMCLOCK_VIRTUAL */
1477 STAM_PROFILE_ADV_RESUME(&pVM->tm.s.StatDoQueuesSchedule, s1);
1478 tmTimerQueueSchedule(pVM, &pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL]);
1479 STAM_PROFILE_ADV_SUSPEND(&pVM->tm.s.StatDoQueuesSchedule, s2);
1480 STAM_PROFILE_ADV_RESUME(&pVM->tm.s.StatDoQueuesRun, r1);
1481 tmR3TimerQueueRun(pVM, &pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL]);
1482 STAM_PROFILE_ADV_SUSPEND(&pVM->tm.s.StatDoQueuesRun, r2);
1483
1484#if 0 /** @todo if ever used, remove this and fix the stam prefixes on TMCLOCK_REAL below. */
1485 /* TMCLOCK_TSC */
1486 STAM_PROFILE_ADV_RESUME(&pVM->tm.s.StatDoQueuesSchedule, s2);
1487 tmTimerQueueSchedule(pVM, &pVM->tm.s.paTimerQueuesR3[TMCLOCK_TSC]);
1488 STAM_PROFILE_ADV_SUSPEND(&pVM->tm.s.StatDoQueuesSchedule, s3);
1489 STAM_PROFILE_ADV_RESUME(&pVM->tm.s.StatDoQueuesRun, r2);
1490 tmR3TimerQueueRun(pVM, &pVM->tm.s.paTimerQueuesR3[TMCLOCK_TSC]);
1491 STAM_PROFILE_ADV_SUSPEND(&pVM->tm.s.StatDoQueuesRun, r3);
1492#endif
1493
1494 /* TMCLOCK_REAL */
1495 STAM_PROFILE_ADV_RESUME(&pVM->tm.s.StatDoQueuesSchedule, s2);
1496 tmTimerQueueSchedule(pVM, &pVM->tm.s.paTimerQueuesR3[TMCLOCK_REAL]);
1497 STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatDoQueuesSchedule, s3);
1498 STAM_PROFILE_ADV_RESUME(&pVM->tm.s.StatDoQueuesRun, r2);
1499 tmR3TimerQueueRun(pVM, &pVM->tm.s.paTimerQueuesR3[TMCLOCK_REAL]);
1500 STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatDoQueuesRun, r3);
1501
1502 /* done. */
1503 VM_FF_CLEAR(pVM, VM_FF_TIMER);
1504
1505#ifdef VBOX_STRICT
1506 /* check that we didn't screwup. */
1507 tmTimerQueuesSanityChecks(pVM, "TMR3TimerQueuesDo");
1508#endif
1509
1510 Log2(("TMR3TimerQueuesDo: returns void\n"));
1511 STAM_PROFILE_STOP(&pVM->tm.s.StatDoQueues, a);
1512}
1513
1514
1515/**
1516 * Schedules and runs any pending times in the specified queue.
1517 *
1518 * This is normally called from a forced action handler in EMT.
1519 *
1520 * @param pVM The VM to run the timers for.
1521 * @param pQueue The queue to run.
1522 */
1523static void tmR3TimerQueueRun(PVM pVM, PTMTIMERQUEUE pQueue)
1524{
1525 VM_ASSERT_EMT(pVM);
1526
1527 /*
1528 * Run timers.
1529 *
1530 * We check the clock once and run all timers which are ACTIVE
1531 * and have an expire time less or equal to the time we read.
1532 *
1533 * N.B. A generic unlink must be applied since other threads
1534 * are allowed to mess with any active timer at any time.
1535 * However, we only allow EMT to handle EXPIRED_PENDING
1536 * timers, thus enabling the timer handler function to
1537 * arm the timer again.
1538 */
1539 PTMTIMER pNext = TMTIMER_GET_HEAD(pQueue);
1540 if (!pNext)
1541 return;
1542 const uint64_t u64Now = tmClock(pVM, pQueue->enmClock);
1543 while (pNext && pNext->u64Expire <= u64Now)
1544 {
1545 PTMTIMER pTimer = pNext;
1546 pNext = TMTIMER_GET_NEXT(pTimer);
1547 Log2(("tmR3TimerQueueRun: pTimer=%p:{.enmState=%s, .enmClock=%d, .enmType=%d, u64Expire=%llx (now=%llx) .pszDesc=%s}\n",
1548 pTimer, tmTimerState(pTimer->enmState), pTimer->enmClock, pTimer->enmType, pTimer->u64Expire, u64Now, pTimer->pszDesc));
1549 bool fRc;
1550 TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_EXPIRED, TMTIMERSTATE_ACTIVE, fRc);
1551 if (fRc)
1552 {
1553 Assert(!pTimer->offScheduleNext); /* this can trigger falsely */
1554
1555 /* unlink */
1556 const PTMTIMER pPrev = TMTIMER_GET_PREV(pTimer);
1557 if (pPrev)
1558 TMTIMER_SET_NEXT(pPrev, pNext);
1559 else
1560 {
1561 TMTIMER_SET_HEAD(pQueue, pNext);
1562 pQueue->u64Expire = pNext ? pNext->u64Expire : INT64_MAX;
1563 }
1564 if (pNext)
1565 TMTIMER_SET_PREV(pNext, pPrev);
1566 pTimer->offNext = 0;
1567 pTimer->offPrev = 0;
1568
1569
1570 /* fire */
1571 switch (pTimer->enmType)
1572 {
1573 case TMTIMERTYPE_DEV: pTimer->u.Dev.pfnTimer(pTimer->u.Dev.pDevIns, pTimer); break;
1574 case TMTIMERTYPE_DRV: pTimer->u.Drv.pfnTimer(pTimer->u.Drv.pDrvIns, pTimer); break;
1575 case TMTIMERTYPE_INTERNAL: pTimer->u.Internal.pfnTimer(pVM, pTimer, pTimer->u.Internal.pvUser); break;
1576 case TMTIMERTYPE_EXTERNAL: pTimer->u.External.pfnTimer(pTimer->u.External.pvUser); break;
1577 default:
1578 AssertMsgFailed(("Invalid timer type %d (%s)\n", pTimer->enmType, pTimer->pszDesc));
1579 break;
1580 }
1581
1582 /* change the state if it wasn't changed already in the handler. */
1583 TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_STOPPED, TMTIMERSTATE_EXPIRED, fRc);
1584 Log2(("tmR3TimerQueueRun: new state %s\n", tmTimerState(pTimer->enmState)));
1585 }
1586 } /* run loop */
1587}
1588
1589
1590/**
1591 * Schedules and runs any pending times in the timer queue for the
1592 * synchronous virtual clock.
1593 *
1594 * This scheduling is a bit different from the other queues as it need
1595 * to implement the special requirements of the timer synchronous virtual
1596 * clock, thus this 2nd queue run funcion.
1597 *
1598 * @param pVM The VM to run the timers for.
1599 */
1600static void tmR3TimerQueueRunVirtualSync(PVM pVM)
1601{
1602 PTMTIMERQUEUE const pQueue = &pVM->tm.s.paTimerQueuesR3[TMCLOCK_VIRTUAL_SYNC];
1603 VM_ASSERT_EMT(pVM);
1604
1605 /*
1606 * Any timers?
1607 */
1608 PTMTIMER pNext = TMTIMER_GET_HEAD(pQueue);
1609 if (RT_UNLIKELY(!pNext))
1610 {
1611 Assert(pVM->tm.s.fVirtualSyncTicking || !pVM->tm.s.fVirtualTicking);
1612 return;
1613 }
1614 STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncRun);
1615
1616 /*
1617 * Calculate the time frame for which we will dispatch timers.
1618 *
1619 * We use a time frame ranging from the current sync time (which is most likely the
1620 * same as the head timer) and some configurable period (100000ns) up towards the
1621 * current virtual time. This period might also need to be restricted by the catch-up
1622 * rate so frequent calls to this function won't accelerate the time too much, however
1623 * this will be implemented at a later point if neccessary.
1624 *
1625 * Without this frame we would 1) having to run timers much more frequently
1626 * and 2) lag behind at a steady rate.
1627 */
1628 const uint64_t u64VirtualNow = TMVirtualGetEx(pVM, false /* don't check timers */);
1629 uint64_t u64Now;
1630 if (!pVM->tm.s.fVirtualSyncTicking)
1631 {
1632 STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncRunStoppedAlready);
1633 u64Now = pVM->tm.s.u64VirtualSync;
1634 Assert(u64Now <= pNext->u64Expire);
1635 }
1636 else
1637 {
1638 /* Calc 'now'. (update order doesn't really matter here) */
1639 uint64_t off = pVM->tm.s.offVirtualSync;
1640 if (pVM->tm.s.fVirtualSyncCatchUp)
1641 {
1642 uint64_t u64Delta = u64VirtualNow - pVM->tm.s.u64VirtualSyncCatchUpPrev;
1643 if (RT_LIKELY(!(u64Delta >> 32)))
1644 {
1645 uint64_t u64Sub = ASMMultU64ByU32DivByU32(u64Delta, pVM->tm.s.u32VirtualSyncCatchUpPercentage, 100);
1646 if (off > u64Sub + pVM->tm.s.offVirtualSyncGivenUp)
1647 {
1648 off -= u64Sub;
1649 Log4(("TM: %RU64/%RU64: sub %RU64 (run)\n", u64VirtualNow - off, off - pVM->tm.s.offVirtualSyncGivenUp, u64Sub));
1650 }
1651 else
1652 {
1653 STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatVirtualSyncCatchup, c);
1654 ASMAtomicXchgBool(&pVM->tm.s.fVirtualSyncCatchUp, false);
1655 off = pVM->tm.s.offVirtualSyncGivenUp;
1656 Log4(("TM: %RU64/0: caught up (run)\n", u64VirtualNow));
1657 }
1658 }
1659 ASMAtomicXchgU64(&pVM->tm.s.offVirtualSync, off);
1660 pVM->tm.s.u64VirtualSyncCatchUpPrev = u64VirtualNow;
1661 }
1662 u64Now = u64VirtualNow - off;
1663
1664 /* Check if stopped by expired timer. */
1665 if (u64Now >= pNext->u64Expire)
1666 {
1667 STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncRunStop);
1668 u64Now = pNext->u64Expire;
1669 ASMAtomicXchgU64(&pVM->tm.s.u64VirtualSync, u64Now);
1670 ASMAtomicXchgBool(&pVM->tm.s.fVirtualSyncTicking, false);
1671 Log4(("TM: %RU64/%RU64: exp tmr (run)\n", u64Now, u64VirtualNow - u64Now - pVM->tm.s.offVirtualSyncGivenUp));
1672
1673 }
1674 }
1675
1676 /* calc end of frame. */
1677 uint64_t u64Max = u64Now + pVM->tm.s.u32VirtualSyncScheduleSlack;
1678 if (u64Max > u64VirtualNow - pVM->tm.s.offVirtualSyncGivenUp)
1679 u64Max = u64VirtualNow - pVM->tm.s.offVirtualSyncGivenUp;
1680
1681 /* assert sanity */
1682 Assert(u64Now <= u64VirtualNow - pVM->tm.s.offVirtualSyncGivenUp);
1683 Assert(u64Max <= u64VirtualNow - pVM->tm.s.offVirtualSyncGivenUp);
1684 Assert(u64Now <= u64Max);
1685
1686 /*
1687 * Process the expired timers moving the clock along as we progress.
1688 */
1689#ifdef VBOX_STRICT
1690 uint64_t u64Prev = u64Now; NOREF(u64Prev);
1691#endif
1692 while (pNext && pNext->u64Expire <= u64Max)
1693 {
1694 PTMTIMER pTimer = pNext;
1695 pNext = TMTIMER_GET_NEXT(pTimer);
1696 Log2(("tmR3TimerQueueRun: pTimer=%p:{.enmState=%s, .enmClock=%d, .enmType=%d, u64Expire=%llx (now=%llx) .pszDesc=%s}\n",
1697 pTimer, tmTimerState(pTimer->enmState), pTimer->enmClock, pTimer->enmType, pTimer->u64Expire, u64Now, pTimer->pszDesc));
1698 bool fRc;
1699 TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_EXPIRED, TMTIMERSTATE_ACTIVE, fRc);
1700 if (fRc)
1701 {
1702 /* unlink */
1703 const PTMTIMER pPrev = TMTIMER_GET_PREV(pTimer);
1704 if (pPrev)
1705 TMTIMER_SET_NEXT(pPrev, pNext);
1706 else
1707 {
1708 TMTIMER_SET_HEAD(pQueue, pNext);
1709 pQueue->u64Expire = pNext ? pNext->u64Expire : INT64_MAX;
1710 }
1711 if (pNext)
1712 TMTIMER_SET_PREV(pNext, pPrev);
1713 pTimer->offNext = 0;
1714 pTimer->offPrev = 0;
1715
1716 /* advance the clock - don't permit timers to be out of order or armed in the 'past'. */
1717#ifdef VBOX_STRICT
1718 AssertMsg(pTimer->u64Expire >= u64Prev, ("%RU64 < %RU64 %s\n", pTimer->u64Expire, u64Prev, pTimer->pszDesc));
1719 u64Prev = pTimer->u64Expire;
1720#endif
1721 ASMAtomicXchgSize(&pVM->tm.s.fVirtualSyncTicking, false);
1722 ASMAtomicXchgU64(&pVM->tm.s.u64VirtualSync, pTimer->u64Expire);
1723
1724 /* fire */
1725 switch (pTimer->enmType)
1726 {
1727 case TMTIMERTYPE_DEV: pTimer->u.Dev.pfnTimer(pTimer->u.Dev.pDevIns, pTimer); break;
1728 case TMTIMERTYPE_DRV: pTimer->u.Drv.pfnTimer(pTimer->u.Drv.pDrvIns, pTimer); break;
1729 case TMTIMERTYPE_INTERNAL: pTimer->u.Internal.pfnTimer(pVM, pTimer, pTimer->u.Internal.pvUser); break;
1730 case TMTIMERTYPE_EXTERNAL: pTimer->u.External.pfnTimer(pTimer->u.External.pvUser); break;
1731 default:
1732 AssertMsgFailed(("Invalid timer type %d (%s)\n", pTimer->enmType, pTimer->pszDesc));
1733 break;
1734 }
1735
1736 /* change the state if it wasn't changed already in the handler. */
1737 TM_TRY_SET_STATE(pTimer, TMTIMERSTATE_STOPPED, TMTIMERSTATE_EXPIRED, fRc);
1738 Log2(("tmR3TimerQueueRun: new state %s\n", tmTimerState(pTimer->enmState)));
1739 }
1740 } /* run loop */
1741
1742 /*
1743 * Restart the clock if it was stopped to serve any timers,
1744 * and start/adjust catch-up if necessary.
1745 */
1746 if ( !pVM->tm.s.fVirtualSyncTicking
1747 && pVM->tm.s.fVirtualTicking)
1748 {
1749 STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncRunRestart);
1750
1751 /* calc the slack we've handed out. */
1752 const uint64_t u64VirtualNow2 = TMVirtualGetEx(pVM, false /* don't check timers */);
1753 Assert(u64VirtualNow2 >= u64VirtualNow);
1754 AssertMsg(pVM->tm.s.u64VirtualSync >= u64Now, ("%RU64 < %RU64\n", pVM->tm.s.u64VirtualSync, u64Now));
1755 const uint64_t offSlack = pVM->tm.s.u64VirtualSync - u64Now;
1756 STAM_STATS({
1757 if (offSlack)
1758 {
1759 PSTAMPROFILE p = &pVM->tm.s.StatVirtualSyncRunSlack;
1760 p->cPeriods++;
1761 p->cTicks += offSlack;
1762 if (p->cTicksMax < offSlack) p->cTicksMax = offSlack;
1763 if (p->cTicksMin > offSlack) p->cTicksMin = offSlack;
1764 }
1765 });
1766
1767 /* Let the time run a little bit while we were busy running timers(?). */
1768 uint64_t u64Elapsed;
1769#define MAX_ELAPSED 30000 /* ns */
1770 if (offSlack > MAX_ELAPSED)
1771 u64Elapsed = 0;
1772 else
1773 {
1774 u64Elapsed = u64VirtualNow2 - u64VirtualNow;
1775 if (u64Elapsed > MAX_ELAPSED)
1776 u64Elapsed = MAX_ELAPSED;
1777 u64Elapsed = u64Elapsed > offSlack ? u64Elapsed - offSlack : 0;
1778 }
1779#undef MAX_ELAPSED
1780
1781 /* Calc the current offset. */
1782 uint64_t offNew = u64VirtualNow2 - pVM->tm.s.u64VirtualSync - u64Elapsed;
1783 Assert(!(offNew & RT_BIT_64(63)));
1784 uint64_t offLag = offNew - pVM->tm.s.offVirtualSyncGivenUp;
1785 Assert(!(offLag & RT_BIT_64(63)));
1786
1787 /*
1788 * Deal with starting, adjusting and stopping catchup.
1789 */
1790 if (pVM->tm.s.fVirtualSyncCatchUp)
1791 {
1792 if (offLag <= pVM->tm.s.u64VirtualSyncCatchUpStopThreshold)
1793 {
1794 /* stop */
1795 STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatVirtualSyncCatchup, c);
1796 ASMAtomicXchgBool(&pVM->tm.s.fVirtualSyncCatchUp, false);
1797 Log4(("TM: %RU64/%RU64: caught up\n", u64VirtualNow2 - offNew, offLag));
1798 }
1799 else if (offLag <= pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold)
1800 {
1801 /* adjust */
1802 unsigned i = 0;
1803 while ( i + 1 < RT_ELEMENTS(pVM->tm.s.aVirtualSyncCatchUpPeriods)
1804 && offLag >= pVM->tm.s.aVirtualSyncCatchUpPeriods[i + 1].u64Start)
1805 i++;
1806 if (pVM->tm.s.u32VirtualSyncCatchUpPercentage < pVM->tm.s.aVirtualSyncCatchUpPeriods[i].u32Percentage)
1807 {
1808 STAM_COUNTER_INC(&pVM->tm.s.aStatVirtualSyncCatchupAdjust[i]);
1809 ASMAtomicXchgU32(&pVM->tm.s.u32VirtualSyncCatchUpPercentage, pVM->tm.s.aVirtualSyncCatchUpPeriods[i].u32Percentage);
1810 Log4(("TM: %RU64/%RU64: adj %u%%\n", u64VirtualNow2 - offNew, offLag, pVM->tm.s.u32VirtualSyncCatchUpPercentage));
1811 }
1812 pVM->tm.s.u64VirtualSyncCatchUpPrev = u64VirtualNow2;
1813 }
1814 else
1815 {
1816 /* give up */
1817 STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncGiveUp);
1818 STAM_PROFILE_ADV_STOP(&pVM->tm.s.StatVirtualSyncCatchup, c);
1819 ASMAtomicXchgU64((uint64_t volatile *)&pVM->tm.s.offVirtualSyncGivenUp, offNew);
1820 ASMAtomicXchgBool(&pVM->tm.s.fVirtualSyncCatchUp, false);
1821 Log4(("TM: %RU64/%RU64: give up %u%%\n", u64VirtualNow2 - offNew, offLag, pVM->tm.s.u32VirtualSyncCatchUpPercentage));
1822 LogRel(("TM: Giving up catch-up attempt at a %RU64 ns lag; new total: %RU64 ns\n", offLag, offNew));
1823 }
1824 }
1825 else if (offLag >= pVM->tm.s.aVirtualSyncCatchUpPeriods[0].u64Start)
1826 {
1827 if (offLag <= pVM->tm.s.u64VirtualSyncCatchUpGiveUpThreshold)
1828 {
1829 /* start */
1830 STAM_PROFILE_ADV_START(&pVM->tm.s.StatVirtualSyncCatchup, c);
1831 unsigned i = 0;
1832 while ( i + 1 < RT_ELEMENTS(pVM->tm.s.aVirtualSyncCatchUpPeriods)
1833 && offLag >= pVM->tm.s.aVirtualSyncCatchUpPeriods[i + 1].u64Start)
1834 i++;
1835 STAM_COUNTER_INC(&pVM->tm.s.aStatVirtualSyncCatchupInitial[i]);
1836 ASMAtomicXchgU32(&pVM->tm.s.u32VirtualSyncCatchUpPercentage, pVM->tm.s.aVirtualSyncCatchUpPeriods[i].u32Percentage);
1837 ASMAtomicXchgBool(&pVM->tm.s.fVirtualSyncCatchUp, true);
1838 Log4(("TM: %RU64/%RU64: catch-up %u%%\n", u64VirtualNow2 - offNew, offLag, pVM->tm.s.u32VirtualSyncCatchUpPercentage));
1839 }
1840 else
1841 {
1842 /* don't bother */
1843 STAM_COUNTER_INC(&pVM->tm.s.StatVirtualSyncGiveUpBeforeStarting);
1844 ASMAtomicXchgU64((uint64_t volatile *)&pVM->tm.s.offVirtualSyncGivenUp, offNew);
1845 Log4(("TM: %RU64/%RU64: give up\n", u64VirtualNow2 - offNew, offLag));
1846 LogRel(("TM: Not bothering to attempt catching up a %RU64 ns lag; new total: %RU64\n", offLag, offNew));
1847 }
1848 }
1849
1850 /*
1851 * Update the offset and restart the clock.
1852 */
1853 Assert(!(offNew & RT_BIT_64(63)));
1854 ASMAtomicXchgU64(&pVM->tm.s.offVirtualSync, offNew);
1855 ASMAtomicXchgBool(&pVM->tm.s.fVirtualSyncTicking, true);
1856 }
1857}
1858
1859
1860/**
1861 * Saves the state of a timer to a saved state.
1862 *
1863 * @returns VBox status.
1864 * @param pTimer Timer to save.
1865 * @param pSSM Save State Manager handle.
1866 */
1867VMMR3DECL(int) TMR3TimerSave(PTMTIMERR3 pTimer, PSSMHANDLE pSSM)
1868{
1869 LogFlow(("TMR3TimerSave: pTimer=%p:{enmState=%s, .pszDesc={%s}} pSSM=%p\n", pTimer, tmTimerState(pTimer->enmState), pTimer->pszDesc, pSSM));
1870 switch (pTimer->enmState)
1871 {
1872 case TMTIMERSTATE_STOPPED:
1873 case TMTIMERSTATE_PENDING_STOP:
1874 case TMTIMERSTATE_PENDING_STOP_SCHEDULE:
1875 return SSMR3PutU8(pSSM, (uint8_t)TMTIMERSTATE_PENDING_STOP);
1876
1877 case TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE:
1878 case TMTIMERSTATE_PENDING_RESCHEDULE_SET_EXPIRE:
1879 AssertMsgFailed(("u64Expire is being updated! (%s)\n", pTimer->pszDesc));
1880 if (!RTThreadYield())
1881 RTThreadSleep(1);
1882 /* fall thru */
1883 case TMTIMERSTATE_ACTIVE:
1884 case TMTIMERSTATE_PENDING_SCHEDULE:
1885 case TMTIMERSTATE_PENDING_RESCHEDULE:
1886 SSMR3PutU8(pSSM, (uint8_t)TMTIMERSTATE_PENDING_SCHEDULE);
1887 return SSMR3PutU64(pSSM, pTimer->u64Expire);
1888
1889 case TMTIMERSTATE_EXPIRED:
1890 case TMTIMERSTATE_PENDING_DESTROY:
1891 case TMTIMERSTATE_PENDING_STOP_DESTROY:
1892 case TMTIMERSTATE_FREE:
1893 AssertMsgFailed(("Invalid timer state %d %s (%s)\n", pTimer->enmState, tmTimerState(pTimer->enmState), pTimer->pszDesc));
1894 return SSMR3HandleSetStatus(pSSM, VERR_TM_INVALID_STATE);
1895 }
1896
1897 AssertMsgFailed(("Unknown timer state %d (%s)\n", pTimer->enmState, pTimer->pszDesc));
1898 return SSMR3HandleSetStatus(pSSM, VERR_TM_UNKNOWN_STATE);
1899}
1900
1901
1902/**
1903 * Loads the state of a timer from a saved state.
1904 *
1905 * @returns VBox status.
1906 * @param pTimer Timer to restore.
1907 * @param pSSM Save State Manager handle.
1908 */
1909VMMR3DECL(int) TMR3TimerLoad(PTMTIMERR3 pTimer, PSSMHANDLE pSSM)
1910{
1911 Assert(pTimer); Assert(pSSM); VM_ASSERT_EMT(pTimer->pVMR3);
1912 LogFlow(("TMR3TimerLoad: pTimer=%p:{enmState=%s, .pszDesc={%s}} pSSM=%p\n", pTimer, tmTimerState(pTimer->enmState), pTimer->pszDesc, pSSM));
1913
1914 /*
1915 * Load the state and validate it.
1916 */
1917 uint8_t u8State;
1918 int rc = SSMR3GetU8(pSSM, &u8State);
1919 if (VBOX_FAILURE(rc))
1920 return rc;
1921 TMTIMERSTATE enmState = (TMTIMERSTATE)u8State;
1922 if ( enmState != TMTIMERSTATE_PENDING_STOP
1923 && enmState != TMTIMERSTATE_PENDING_SCHEDULE
1924 && enmState != TMTIMERSTATE_PENDING_STOP_SCHEDULE)
1925 {
1926 AssertMsgFailed(("enmState=%d %s\n", enmState, tmTimerState(enmState)));
1927 return SSMR3HandleSetStatus(pSSM, VERR_TM_LOAD_STATE);
1928 }
1929
1930 if (enmState == TMTIMERSTATE_PENDING_SCHEDULE)
1931 {
1932 /*
1933 * Load the expire time.
1934 */
1935 uint64_t u64Expire;
1936 rc = SSMR3GetU64(pSSM, &u64Expire);
1937 if (VBOX_FAILURE(rc))
1938 return rc;
1939
1940 /*
1941 * Set it.
1942 */
1943 Log(("enmState=%d %s u64Expire=%llu\n", enmState, tmTimerState(enmState), u64Expire));
1944 rc = TMTimerSet(pTimer, u64Expire);
1945 }
1946 else
1947 {
1948 /*
1949 * Stop it.
1950 */
1951 Log(("enmState=%d %s\n", enmState, tmTimerState(enmState)));
1952 rc = TMTimerStop(pTimer);
1953 }
1954
1955 /*
1956 * On failure set SSM status.
1957 */
1958 if (VBOX_FAILURE(rc))
1959 rc = SSMR3HandleSetStatus(pSSM, rc);
1960 return rc;
1961}
1962
1963
1964/**
1965 * Get the real world UTC time adjusted for VM lag.
1966 *
1967 * @returns pTime.
1968 * @param pVM The VM instance.
1969 * @param pTime Where to store the time.
1970 */
1971VMMR3DECL(PRTTIMESPEC) TMR3UTCNow(PVM pVM, PRTTIMESPEC pTime)
1972{
1973 RTTimeNow(pTime);
1974 RTTimeSpecSubNano(pTime, pVM->tm.s.offVirtualSync - pVM->tm.s.offVirtualSyncGivenUp);
1975 RTTimeSpecAddNano(pTime, pVM->tm.s.offUTC);
1976 return pTime;
1977}
1978
1979
1980/**
1981 * Display all timers.
1982 *
1983 * @param pVM VM Handle.
1984 * @param pHlp The info helpers.
1985 * @param pszArgs Arguments, ignored.
1986 */
1987static DECLCALLBACK(void) tmR3TimerInfo(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
1988{
1989 NOREF(pszArgs);
1990 pHlp->pfnPrintf(pHlp,
1991 "Timers (pVM=%p)\n"
1992 "%.*s %.*s %.*s %.*s Clock %-18s %-18s %-25s Description\n",
1993 pVM,
1994 sizeof(RTR3PTR) * 2, "pTimerR3 ",
1995 sizeof(int32_t) * 2, "offNext ",
1996 sizeof(int32_t) * 2, "offPrev ",
1997 sizeof(int32_t) * 2, "offSched ",
1998 "Time",
1999 "Expire",
2000 "State");
2001 for (PTMTIMERR3 pTimer = pVM->tm.s.pCreated; pTimer; pTimer = pTimer->pBigNext)
2002 {
2003 pHlp->pfnPrintf(pHlp,
2004 "%p %08RX32 %08RX32 %08RX32 %s %18RU64 %18RU64 %-25s %s\n",
2005 pTimer,
2006 pTimer->offNext,
2007 pTimer->offPrev,
2008 pTimer->offScheduleNext,
2009 pTimer->enmClock == TMCLOCK_REAL ? "Real " : "Virt ",
2010 TMTimerGet(pTimer),
2011 pTimer->u64Expire,
2012 tmTimerState(pTimer->enmState),
2013 pTimer->pszDesc);
2014 }
2015}
2016
2017
2018/**
2019 * Display all active timers.
2020 *
2021 * @param pVM VM Handle.
2022 * @param pHlp The info helpers.
2023 * @param pszArgs Arguments, ignored.
2024 */
2025static DECLCALLBACK(void) tmR3TimerInfoActive(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
2026{
2027 NOREF(pszArgs);
2028 pHlp->pfnPrintf(pHlp,
2029 "Active Timers (pVM=%p)\n"
2030 "%.*s %.*s %.*s %.*s Clock %-18s %-18s %-25s Description\n",
2031 pVM,
2032 sizeof(RTR3PTR) * 2, "pTimerR3 ",
2033 sizeof(int32_t) * 2, "offNext ",
2034 sizeof(int32_t) * 2, "offPrev ",
2035 sizeof(int32_t) * 2, "offSched ",
2036 "Time",
2037 "Expire",
2038 "State");
2039 for (unsigned iQueue = 0; iQueue < TMCLOCK_MAX; iQueue++)
2040 {
2041 for (PTMTIMERR3 pTimer = TMTIMER_GET_HEAD(&pVM->tm.s.paTimerQueuesR3[iQueue]);
2042 pTimer;
2043 pTimer = TMTIMER_GET_NEXT(pTimer))
2044 {
2045 pHlp->pfnPrintf(pHlp,
2046 "%p %08RX32 %08RX32 %08RX32 %s %18RU64 %18RU64 %-25s %s\n",
2047 pTimer,
2048 pTimer->offNext,
2049 pTimer->offPrev,
2050 pTimer->offScheduleNext,
2051 pTimer->enmClock == TMCLOCK_REAL
2052 ? "Real "
2053 : pTimer->enmClock == TMCLOCK_VIRTUAL
2054 ? "Virt "
2055 : pTimer->enmClock == TMCLOCK_VIRTUAL_SYNC
2056 ? "VrSy "
2057 : "TSC ",
2058 TMTimerGet(pTimer),
2059 pTimer->u64Expire,
2060 tmTimerState(pTimer->enmState),
2061 pTimer->pszDesc);
2062 }
2063 }
2064}
2065
2066
2067/**
2068 * Display all clocks.
2069 *
2070 * @param pVM VM Handle.
2071 * @param pHlp The info helpers.
2072 * @param pszArgs Arguments, ignored.
2073 */
2074static DECLCALLBACK(void) tmR3InfoClocks(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
2075{
2076 NOREF(pszArgs);
2077
2078 /*
2079 * Read the times first to avoid more than necessary time variation.
2080 */
2081 const uint64_t u64TSC = TMCpuTickGet(pVM);
2082 const uint64_t u64Virtual = TMVirtualGet(pVM);
2083 const uint64_t u64VirtualSync = TMVirtualSyncGet(pVM);
2084 const uint64_t u64Real = TMRealGet(pVM);
2085
2086 /*
2087 * TSC
2088 */
2089 pHlp->pfnPrintf(pHlp,
2090 "Cpu Tick: %18RU64 (%#016RX64) %RU64Hz %s%s",
2091 u64TSC, u64TSC, TMCpuTicksPerSecond(pVM),
2092 pVM->tm.s.fTSCTicking ? "ticking" : "paused",
2093 pVM->tm.s.fTSCVirtualized ? " - virtualized" : "");
2094 if (pVM->tm.s.fTSCUseRealTSC)
2095 {
2096 pHlp->pfnPrintf(pHlp, " - real tsc");
2097 if (pVM->tm.s.u64TSCOffset)
2098 pHlp->pfnPrintf(pHlp, "\n offset %RU64", pVM->tm.s.u64TSCOffset);
2099 }
2100 else
2101 pHlp->pfnPrintf(pHlp, " - virtual clock");
2102 pHlp->pfnPrintf(pHlp, "\n");
2103
2104 /*
2105 * virtual
2106 */
2107 pHlp->pfnPrintf(pHlp,
2108 " Virtual: %18RU64 (%#016RX64) %RU64Hz %s",
2109 u64Virtual, u64Virtual, TMVirtualGetFreq(pVM),
2110 pVM->tm.s.fVirtualTicking ? "ticking" : "paused");
2111 if (pVM->tm.s.fVirtualWarpDrive)
2112 pHlp->pfnPrintf(pHlp, " WarpDrive %RU32 %%", pVM->tm.s.u32VirtualWarpDrivePercentage);
2113 pHlp->pfnPrintf(pHlp, "\n");
2114
2115 /*
2116 * virtual sync
2117 */
2118 pHlp->pfnPrintf(pHlp,
2119 "VirtSync: %18RU64 (%#016RX64) %s%s",
2120 u64VirtualSync, u64VirtualSync,
2121 pVM->tm.s.fVirtualSyncTicking ? "ticking" : "paused",
2122 pVM->tm.s.fVirtualSyncCatchUp ? " - catchup" : "");
2123 if (pVM->tm.s.offVirtualSync)
2124 {
2125 pHlp->pfnPrintf(pHlp, "\n offset %RU64", pVM->tm.s.offVirtualSync);
2126 if (pVM->tm.s.u32VirtualSyncCatchUpPercentage)
2127 pHlp->pfnPrintf(pHlp, " catch-up rate %u %%", pVM->tm.s.u32VirtualSyncCatchUpPercentage);
2128 }
2129 pHlp->pfnPrintf(pHlp, "\n");
2130
2131 /*
2132 * real
2133 */
2134 pHlp->pfnPrintf(pHlp,
2135 " Real: %18RU64 (%#016RX64) %RU64Hz\n",
2136 u64Real, u64Real, TMRealGetFreq(pVM));
2137}
2138
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