VirtualBox

source: vbox/trunk/src/VBox/VMM/TMInternal.h@ 33000

Last change on this file since 33000 was 32796, checked in by vboxsync, 14 years ago

GVMMR0,TM,STAM: Periodic preemption timer fixes, adjustments and statistics. (still disabled)
  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 29.6 KB
Line 
1/* $Id: TMInternal.h 32796 2010-09-28 14:54:41Z vboxsync $ */
2/** @file
3 * TM - Internal header file.
4 */
5
6/*
7 * Copyright (C) 2006-2007 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 */
17
18#ifndef ___TMInternal_h
19#define ___TMInternal_h
20
21#include <VBox/cdefs.h>
22#include <VBox/types.h>
23#include <iprt/time.h>
24#include <iprt/timer.h>
25#include <iprt/assert.h>
26#include <VBox/stam.h>
27#include <VBox/pdmcritsect.h>
28
29RT_C_DECLS_BEGIN
30
31
32/** @defgroup grp_tm_int Internal
33 * @ingroup grp_tm
34 * @internal
35 * @{
36 */
37
38/** Frequency of the real clock. */
39#define TMCLOCK_FREQ_REAL UINT32_C(1000)
40/** Frequency of the virtual clock. */
41#define TMCLOCK_FREQ_VIRTUAL UINT32_C(1000000000)
42
43
44/**
45 * Timer type.
46 */
47typedef enum TMTIMERTYPE
48{
49 /** Device timer. */
50 TMTIMERTYPE_DEV = 1,
51 /** Driver timer. */
52 TMTIMERTYPE_DRV,
53 /** Internal timer . */
54 TMTIMERTYPE_INTERNAL,
55 /** External timer. */
56 TMTIMERTYPE_EXTERNAL
57} TMTIMERTYPE;
58
59/**
60 * Timer state
61 */
62typedef enum TMTIMERSTATE
63{
64 /** Timer is stopped. */
65 TMTIMERSTATE_STOPPED = 1,
66 /** Timer is active. */
67 TMTIMERSTATE_ACTIVE,
68 /** Timer is expired, getting expire and unlinking. */
69 TMTIMERSTATE_EXPIRED_GET_UNLINK,
70 /** Timer is expired and is being delivered. */
71 TMTIMERSTATE_EXPIRED_DELIVER,
72
73 /** Timer is stopped but still in the active list.
74 * Currently in the ScheduleTimers list. */
75 TMTIMERSTATE_PENDING_STOP,
76 /** Timer is stopped but needs unlinking from the ScheduleTimers list.
77 * Currently in the ScheduleTimers list. */
78 TMTIMERSTATE_PENDING_STOP_SCHEDULE,
79 /** Timer is being modified and will soon be pending scheduling.
80 * Currently in the ScheduleTimers list. */
81 TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE,
82 /** Timer is pending scheduling.
83 * Currently in the ScheduleTimers list. */
84 TMTIMERSTATE_PENDING_SCHEDULE,
85 /** Timer is being modified and will soon be pending rescheduling.
86 * Currently in the ScheduleTimers list and the active list. */
87 TMTIMERSTATE_PENDING_RESCHEDULE_SET_EXPIRE,
88 /** Timer is modified and is now pending rescheduling.
89 * Currently in the ScheduleTimers list and the active list. */
90 TMTIMERSTATE_PENDING_RESCHEDULE,
91 /** Timer is being destroyed. */
92 TMTIMERSTATE_DESTROY,
93 /** Timer is free. */
94 TMTIMERSTATE_FREE
95} TMTIMERSTATE;
96
97/** Predicate that returns true if the give state is pending scheduling or
98 * rescheduling of any kind. Will reference the argument more than once! */
99#define TMTIMERSTATE_IS_PENDING_SCHEDULING(enmState) \
100 ( (enmState) <= TMTIMERSTATE_PENDING_RESCHEDULE \
101 && (enmState) >= TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE)
102
103
104/**
105 * Internal representation of a timer.
106 *
107 * For correct serialization (without the use of semaphores and
108 * other blocking/slow constructs) certain rules applies to updating
109 * this structure:
110 * - For thread other than EMT only u64Expire, enmState and pScheduleNext*
111 * are changeable. Everything else is out of bounds.
112 * - Updating of u64Expire timer can only happen in the TMTIMERSTATE_STOPPED
113 * and TMTIMERSTATE_PENDING_RESCHEDULING_SET_EXPIRE states.
114 * - Timers in the TMTIMERSTATE_EXPIRED state are only accessible from EMT.
115 * - Actual destruction of a timer can only be done at scheduling time.
116 */
117typedef struct TMTIMER
118{
119 /** Expire time. */
120 volatile uint64_t u64Expire;
121 /** Clock to apply to u64Expire. */
122 TMCLOCK enmClock;
123 /** Timer callback type. */
124 TMTIMERTYPE enmType;
125 /** Type specific data. */
126 union
127 {
128 /** TMTIMERTYPE_DEV. */
129 struct
130 {
131 /** Callback. */
132 R3PTRTYPE(PFNTMTIMERDEV) pfnTimer;
133 /** Device instance. */
134 PPDMDEVINSR3 pDevIns;
135 } Dev;
136
137 /** TMTIMERTYPE_DRV. */
138 struct
139 {
140 /** Callback. */
141 R3PTRTYPE(PFNTMTIMERDRV) pfnTimer;
142 /** Device instance. */
143 R3PTRTYPE(PPDMDRVINS) pDrvIns;
144 } Drv;
145
146 /** TMTIMERTYPE_INTERNAL. */
147 struct
148 {
149 /** Callback. */
150 R3PTRTYPE(PFNTMTIMERINT) pfnTimer;
151 } Internal;
152
153 /** TMTIMERTYPE_EXTERNAL. */
154 struct
155 {
156 /** Callback. */
157 R3PTRTYPE(PFNTMTIMEREXT) pfnTimer;
158 } External;
159 } u;
160
161 /** Timer state. */
162 volatile TMTIMERSTATE enmState;
163 /** Timer relative offset to the next timer in the schedule list. */
164 int32_t volatile offScheduleNext;
165
166 /** Timer relative offset to the next timer in the chain. */
167 int32_t offNext;
168 /** Timer relative offset to the previous timer in the chain. */
169 int32_t offPrev;
170
171 /** Pointer to the VM the timer belongs to - R3 Ptr. */
172 PVMR3 pVMR3;
173 /** Pointer to the VM the timer belongs to - R0 Ptr. */
174 PVMR0 pVMR0;
175 /** Pointer to the VM the timer belongs to - RC Ptr. */
176 PVMRC pVMRC;
177 /** The timer frequency hint. This is 0 if not hint was given. */
178 uint32_t volatile uHzHint;
179
180 /** User argument. */
181 RTR3PTR pvUser;
182 /** The critical section associated with the lock. */
183 R3PTRTYPE(PPDMCRITSECT) pCritSect;
184
185 /** Pointer to the next timer in the list of created or free timers. (TM::pTimers or TM::pFree) */
186 PTMTIMERR3 pBigNext;
187 /** Pointer to the previous timer in the list of all created timers. (TM::pTimers) */
188 PTMTIMERR3 pBigPrev;
189 /** Pointer to the timer description. */
190 R3PTRTYPE(const char *) pszDesc;
191#if HC_ARCH_BITS == 32
192 uint32_t padding0; /**< pad structure to multiple of 8 bytes. */
193#endif
194} TMTIMER;
195AssertCompileMemberSize(TMTIMER, enmState, sizeof(uint32_t));
196
197
198/**
199 * Updates a timer state in the correct atomic manner.
200 */
201#if 1
202# define TM_SET_STATE(pTimer, state) \
203 ASMAtomicWriteU32((uint32_t volatile *)&(pTimer)->enmState, state)
204#else
205# define TM_SET_STATE(pTimer, state) \
206 do { \
207 uint32_t uOld1 = (pTimer)->enmState; \
208 Log(("%s: %p: %d -> %d\n", __FUNCTION__, (pTimer), (pTimer)->enmState, state)); \
209 uint32_t uOld2 = ASMAtomicXchgU32((uint32_t volatile *)&(pTimer)->enmState, state); \
210 Assert(uOld1 == uOld2); \
211 } while (0)
212#endif
213
214/**
215 * Tries to updates a timer state in the correct atomic manner.
216 */
217#if 1
218# define TM_TRY_SET_STATE(pTimer, StateNew, StateOld, fRc) \
219 (fRc) = ASMAtomicCmpXchgU32((uint32_t volatile *)&(pTimer)->enmState, StateNew, StateOld)
220#else
221# define TM_TRY_SET_STATE(pTimer, StateNew, StateOld, fRc) \
222 do { (fRc) = ASMAtomicCmpXchgU32((uint32_t volatile *)&(pTimer)->enmState, StateNew, StateOld); \
223 Log(("%s: %p: %d -> %d %RTbool\n", __FUNCTION__, (pTimer), StateOld, StateNew, fRc)); \
224 } while (0)
225#endif
226
227/** Get the previous timer. */
228#define TMTIMER_GET_PREV(pTimer) ((PTMTIMER)((pTimer)->offPrev ? (intptr_t)(pTimer) + (pTimer)->offPrev : 0))
229/** Get the next timer. */
230#define TMTIMER_GET_NEXT(pTimer) ((PTMTIMER)((pTimer)->offNext ? (intptr_t)(pTimer) + (pTimer)->offNext : 0))
231/** Set the previous timer link. */
232#define TMTIMER_SET_PREV(pTimer, pPrev) ((pTimer)->offPrev = (pPrev) ? (intptr_t)(pPrev) - (intptr_t)(pTimer) : 0)
233/** Set the next timer link. */
234#define TMTIMER_SET_NEXT(pTimer, pNext) ((pTimer)->offNext = (pNext) ? (intptr_t)(pNext) - (intptr_t)(pTimer) : 0)
235
236
237/**
238 * A timer queue.
239 *
240 * This is allocated on the hyper heap.
241 */
242typedef struct TMTIMERQUEUE
243{
244 /** The cached expire time for this queue.
245 * Updated by EMT when scheduling the queue or modifying the head timer.
246 * Assigned UINT64_MAX when there is no head timer. */
247 uint64_t u64Expire;
248 /** Doubly linked list of active timers.
249 *
250 * When no scheduling is pending, this list is will be ordered by expire time (ascending).
251 * Access is serialized by only letting the emulation thread (EMT) do changes.
252 *
253 * The offset is relative to the queue structure.
254 */
255 int32_t offActive;
256 /** List of timers pending scheduling of some kind.
257 *
258 * Timer stats allowed in the list are TMTIMERSTATE_PENDING_STOPPING,
259 * TMTIMERSTATE_PENDING_DESTRUCTION, TMTIMERSTATE_PENDING_STOPPING_DESTRUCTION,
260 * TMTIMERSTATE_PENDING_RESCHEDULING and TMTIMERSTATE_PENDING_SCHEDULE.
261 *
262 * The offset is relative to the queue structure.
263 */
264 int32_t volatile offSchedule;
265 /** The clock for this queue. */
266 TMCLOCK enmClock;
267 /** Pad the structure up to 32 bytes. */
268 uint32_t au32Padding[3];
269} TMTIMERQUEUE;
270
271/** Pointer to a timer queue. */
272typedef TMTIMERQUEUE *PTMTIMERQUEUE;
273
274/** Get the head of the active timer list. */
275#define TMTIMER_GET_HEAD(pQueue) ((PTMTIMER)((pQueue)->offActive ? (intptr_t)(pQueue) + (pQueue)->offActive : 0))
276/** Set the head of the active timer list. */
277#define TMTIMER_SET_HEAD(pQueue, pHead) ((pQueue)->offActive = pHead ? (intptr_t)pHead - (intptr_t)(pQueue) : 0)
278
279
280/**
281 * CPU load data set.
282 * Mainly used by tmR3CpuLoadTimer.
283 */
284typedef struct TMCPULOADSTATE
285{
286 /** The percent of the period spent executing guest code. */
287 uint8_t cPctExecuting;
288 /** The percent of the period spent halted. */
289 uint8_t cPctHalted;
290 /** The percent of the period spent on other things. */
291 uint8_t cPctOther;
292 /** Explicit alignment padding */
293 uint8_t au8Alignment[5];
294
295 /** Previous cNsTotal value. */
296 uint64_t cNsPrevTotal;
297 /** Previous cNsExecuting value. */
298 uint64_t cNsPrevExecuting;
299 /** Previous cNsHalted value. */
300 uint64_t cNsPrevHalted;
301} TMCPULOADSTATE;
302AssertCompileSizeAlignment(TMCPULOADSTATE, 8);
303AssertCompileMemberAlignment(TMCPULOADSTATE, cNsPrevTotal, 8);
304/** Pointer to a CPU load data set. */
305typedef TMCPULOADSTATE *PTMCPULOADSTATE;
306
307/**
308 * Converts a TM pointer into a VM pointer.
309 * @returns Pointer to the VM structure the TM is part of.
310 * @param pTM Pointer to TM instance data.
311 */
312#define TM2VM(pTM) ( (PVM)((char*)pTM - pTM->offVM) )
313
314
315/**
316 * TM VM Instance data.
317 * Changes to this must checked against the padding of the cfgm union in VM!
318 */
319typedef struct TM
320{
321 /** Offset to the VM structure.
322 * See TM2VM(). */
323 RTUINT offVM;
324
325 /** Set if we fully virtualize the TSC, i.e. intercept all rdtsc instructions.
326 * Config variable: TSCVirtualized (bool) */
327 bool fTSCVirtualized;
328 /** Set if we use the real TSC as time source or if we use the virtual clock.
329 * If fTSCVirtualized is set we maintain a offset to the TSC and pausing/resuming the
330 * ticking. fTSCVirtualized = false implies fTSCUseRealTSC = true.
331 * Config variable: TSCUseRealTSC (bool) */
332 bool fTSCUseRealTSC;
333 /** Flag indicating that the host TSC is suitable for use in AMD-V and VT-x mode.
334 * Config variable: MaybeUseOffsettedHostTSC (boolean) */
335 bool fMaybeUseOffsettedHostTSC;
336 /** Whether the TSC is tied to the execution of code.
337 * Config variable: TSCTiedToExecution (bool) */
338 bool fTSCTiedToExecution;
339 /** Modifier for fTSCTiedToExecution which pauses the TSC while halting if true.
340 * Config variable: TSCNotTiedToHalt (bool) */
341 bool fTSCNotTiedToHalt;
342 bool afAlignment0[2]; /**< alignment padding */
343 /** The ID of the virtual CPU that normally runs the timers. */
344 VMCPUID idTimerCpu;
345 /** The number of CPU clock ticks per second (TMCLOCK_TSC).
346 * Config variable: TSCTicksPerSecond (64-bit unsigned int)
347 * The config variable implies fTSCVirtualized = true and fTSCUseRealTSC = false. */
348 uint64_t cTSCTicksPerSecond;
349
350 /** Virtual time ticking enabled indicator (counter for each VCPU). (TMCLOCK_VIRTUAL) */
351 uint32_t volatile cVirtualTicking;
352 /** Virtual time is not running at 100%. */
353 bool fVirtualWarpDrive;
354 /** Virtual timer synchronous time ticking enabled indicator (bool). (TMCLOCK_VIRTUAL_SYNC) */
355 bool volatile fVirtualSyncTicking;
356 /** Virtual timer synchronous time catch-up active. */
357 bool volatile fVirtualSyncCatchUp;
358 bool afAlignment1[5]; /**< alignment padding */
359 /** WarpDrive percentage.
360 * 100% is normal (fVirtualSyncNormal == true). When other than 100% we apply
361 * this percentage to the raw time source for the period it's been valid in,
362 * i.e. since u64VirtualWarpDriveStart. */
363 uint32_t u32VirtualWarpDrivePercentage;
364
365 /** The offset of the virtual clock relative to it's timesource.
366 * Only valid if fVirtualTicking is set. */
367 uint64_t u64VirtualOffset;
368 /** The guest virtual time when fVirtualTicking is cleared. */
369 uint64_t u64Virtual;
370 /** When the Warp drive was started or last adjusted.
371 * Only valid when fVirtualWarpDrive is set. */
372 uint64_t u64VirtualWarpDriveStart;
373 /** The previously returned nano TS.
374 * This handles TSC drift on SMP systems and expired interval.
375 * This is a valid range u64NanoTS to u64NanoTS + 1000000000 (ie. 1sec). */
376 uint64_t volatile u64VirtualRawPrev;
377 /** The ring-3 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
378 RTTIMENANOTSDATAR3 VirtualGetRawDataR3;
379 /** The ring-0 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
380 RTTIMENANOTSDATAR0 VirtualGetRawDataR0;
381 /** The ring-0 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
382 RTTIMENANOTSDATARC VirtualGetRawDataRC;
383 /** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
384 R3PTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawR3;
385 /** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
386 R0PTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawR0;
387 /** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
388 RCPTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawRC;
389 /** Alignment. */
390 RTRCPTR AlignmentRCPtr;
391 /** The guest virtual timer synchronous time when fVirtualSyncTicking is cleared. */
392 uint64_t volatile u64VirtualSync;
393 /** The offset of the timer synchronous virtual clock (TMCLOCK_VIRTUAL_SYNC) relative
394 * to the virtual clock (TMCLOCK_VIRTUAL).
395 * (This is accessed by the timer thread and must be updated atomically.) */
396 uint64_t volatile offVirtualSync;
397 /** The offset into offVirtualSync that's been irrevocably given up by failed catch-up attempts.
398 * Thus the current lag is offVirtualSync - offVirtualSyncGivenUp. */
399 uint64_t offVirtualSyncGivenUp;
400 /** The TMCLOCK_VIRTUAL at the previous TMVirtualGetSync call when catch-up is active. */
401 uint64_t volatile u64VirtualSyncCatchUpPrev;
402 /** The current catch-up percentage. */
403 uint32_t volatile u32VirtualSyncCatchUpPercentage;
404 /** How much slack when processing timers. */
405 uint32_t u32VirtualSyncScheduleSlack;
406 /** When to stop catch-up. */
407 uint64_t u64VirtualSyncCatchUpStopThreshold;
408 /** When to give up catch-up. */
409 uint64_t u64VirtualSyncCatchUpGiveUpThreshold;
410/** @def TM_MAX_CATCHUP_PERIODS
411 * The number of catchup rates. */
412#define TM_MAX_CATCHUP_PERIODS 10
413 /** The agressivness of the catch-up relative to how far we've lagged behind.
414 * The idea is to have increasing catch-up percentage as the lag increases. */
415 struct TMCATCHUPPERIOD
416 {
417 uint64_t u64Start; /**< When this period starts. (u64VirtualSyncOffset). */
418 uint32_t u32Percentage; /**< The catch-up percent to apply. */
419 uint32_t u32Alignment; /**< Structure alignment */
420 } aVirtualSyncCatchUpPeriods[TM_MAX_CATCHUP_PERIODS];
421
422 /** The current max timer Hz hint. */
423 uint32_t volatile uMaxHzHint;
424 /** Whether to recalulate the HzHint next time its queried. */
425 bool volatile fHzHintNeedsUpdating;
426 /** Alignment */
427 bool afAlignment2[3];
428 /** @cfgm{TM/HostHzMax, uint32_t, Hz, 0, UINT32_MAX, 20000}
429 * The max host Hz frequency hint returned by TMCalcHostTimerFrequency. */
430 uint32_t cHostHzMax;
431 /** @cfgm{TM/HostHzFudgeFactorTimerCpu, uint32_t, Hz, 0, UINT32_MAX, 111}
432 * The number of Hz TMCalcHostTimerFrequency adds for the timer CPU. */
433 uint32_t cPctHostHzFudgeFactorTimerCpu;
434 /** @cfgm{TM/HostHzFudgeFactorOtherCpu, uint32_t, Hz, 0, UINT32_MAX, 110}
435 * The number of Hz TMCalcHostTimerFrequency adds for the other CPUs. */
436 uint32_t cPctHostHzFudgeFactorOtherCpu;
437 /** @cfgm{TM/HostHzFudgeFactorCatchUp100, uint32_t, Hz, 0, UINT32_MAX, 300}
438 * The fudge factor (expressed in percent) that catch-up percentages below
439 * 100% is multiplied by. */
440 uint32_t cPctHostHzFudgeFactorCatchUp100;
441 /** @cfgm{TM/HostHzFudgeFactorCatchUp200, uint32_t, Hz, 0, UINT32_MAX, 250}
442 * The fudge factor (expressed in percent) that catch-up percentages
443 * 100%-199% is multiplied by. */
444 uint32_t cPctHostHzFudgeFactorCatchUp200;
445 /** @cfgm{TM/HostHzFudgeFactorCatchUp400, uint32_t, Hz, 0, UINT32_MAX, 200}
446 * The fudge factor (expressed in percent) that catch-up percentages
447 * 200%-399% is multiplied by. */
448 uint32_t cPctHostHzFudgeFactorCatchUp400;
449
450 /** The UTC offset in ns.
451 * This is *NOT* for converting UTC to local time. It is for converting real
452 * world UTC time to VM UTC time. This feature is indented for doing date
453 * testing of software and similar.
454 * @todo Implement warpdrive on UTC. */
455 int64_t offUTC;
456
457 /** Timer queues for the different clock types - R3 Ptr */
458 R3PTRTYPE(PTMTIMERQUEUE) paTimerQueuesR3;
459 /** Timer queues for the different clock types - R0 Ptr */
460 R0PTRTYPE(PTMTIMERQUEUE) paTimerQueuesR0;
461 /** Timer queues for the different clock types - RC Ptr */
462 RCPTRTYPE(PTMTIMERQUEUE) paTimerQueuesRC;
463
464 /** Pointer to our RC mapping of the GIP. */
465 RCPTRTYPE(void *) pvGIPRC;
466 /** Pointer to our R3 mapping of the GIP. */
467 R3PTRTYPE(void *) pvGIPR3;
468
469 /** Pointer to a singly linked list of free timers.
470 * This chain is using the TMTIMER::pBigNext members.
471 * Only accessible from the emulation thread. */
472 PTMTIMERR3 pFree;
473
474 /** Pointer to a doubly linked list of created timers.
475 * This chain is using the TMTIMER::pBigNext and TMTIMER::pBigPrev members.
476 * Only accessible from the emulation thread. */
477 PTMTIMERR3 pCreated;
478
479 /** The schedulation timer timer handle (runtime timer).
480 * This timer will do freqent check on pending queue schedulations and
481 * raise VM_FF_TIMER to pull EMTs attention to them.
482 */
483 R3PTRTYPE(PRTTIMER) pTimer;
484 /** Interval in milliseconds of the pTimer timer. */
485 uint32_t u32TimerMillies;
486
487 /** Indicates that queues are being run. */
488 bool volatile fRunningQueues;
489 /** Indicates that the virtual sync queue is being run. */
490 bool volatile fRunningVirtualSyncQueue;
491 /** Alignment */
492 bool afAlignment3[2];
493
494 /** Lock serializing access to the timer lists. */
495 PDMCRITSECT TimerCritSect;
496 /** Lock serializing access to the VirtualSync clock. */
497 PDMCRITSECT VirtualSyncLock;
498
499 /** CPU load state for all the virtual CPUs (tmR3CpuLoadTimer). */
500 TMCPULOADSTATE CpuLoad;
501
502 /** TMR3TimerQueuesDo
503 * @{ */
504 STAMPROFILE StatDoQueues;
505 STAMPROFILEADV aStatDoQueues[TMCLOCK_MAX];
506 /** @} */
507 /** tmSchedule
508 * @{ */
509 STAMPROFILE StatScheduleOneRZ;
510 STAMPROFILE StatScheduleOneR3;
511 STAMCOUNTER StatScheduleSetFF;
512 STAMCOUNTER StatPostponedR3;
513 STAMCOUNTER StatPostponedRZ;
514 /** @} */
515 /** Read the time
516 * @{ */
517 STAMCOUNTER StatVirtualGet;
518 STAMCOUNTER StatVirtualGetSetFF;
519 STAMCOUNTER StatVirtualSyncGet;
520 STAMCOUNTER StatVirtualSyncGetELoop;
521 STAMCOUNTER StatVirtualSyncGetExpired;
522 STAMCOUNTER StatVirtualSyncGetLockless;
523 STAMCOUNTER StatVirtualSyncGetLocked;
524 STAMCOUNTER StatVirtualSyncGetSetFF;
525 STAMCOUNTER StatVirtualPause;
526 STAMCOUNTER StatVirtualResume;
527 /* @} */
528 /** TMTimerPoll
529 * @{ */
530 STAMCOUNTER StatPoll;
531 STAMCOUNTER StatPollAlreadySet;
532 STAMCOUNTER StatPollELoop;
533 STAMCOUNTER StatPollMiss;
534 STAMCOUNTER StatPollRunning;
535 STAMCOUNTER StatPollSimple;
536 STAMCOUNTER StatPollVirtual;
537 STAMCOUNTER StatPollVirtualSync;
538 /** @} */
539 /** TMTimerSet
540 * @{ */
541 STAMCOUNTER StatTimerSet;
542 STAMCOUNTER StatTimerSetOpt;
543 STAMPROFILE StatTimerSetRZ;
544 STAMPROFILE StatTimerSetR3;
545 STAMCOUNTER StatTimerSetStStopped;
546 STAMCOUNTER StatTimerSetStExpDeliver;
547 STAMCOUNTER StatTimerSetStActive;
548 STAMCOUNTER StatTimerSetStPendStop;
549 STAMCOUNTER StatTimerSetStPendStopSched;
550 STAMCOUNTER StatTimerSetStPendSched;
551 STAMCOUNTER StatTimerSetStPendResched;
552 STAMCOUNTER StatTimerSetStOther;
553 /** @} */
554 /** TMTimerSetRelative
555 * @{ */
556 STAMCOUNTER StatTimerSetRelative;
557 STAMPROFILE StatTimerSetRelativeRZ;
558 STAMPROFILE StatTimerSetRelativeR3;
559 STAMCOUNTER StatTimerSetRelativeOpt;
560 STAMCOUNTER StatTimerSetRelativeRacyVirtSync;
561 STAMCOUNTER StatTimerSetRelativeStStopped;
562 STAMCOUNTER StatTimerSetRelativeStExpDeliver;
563 STAMCOUNTER StatTimerSetRelativeStActive;
564 STAMCOUNTER StatTimerSetRelativeStPendStop;
565 STAMCOUNTER StatTimerSetRelativeStPendStopSched;
566 STAMCOUNTER StatTimerSetRelativeStPendSched;
567 STAMCOUNTER StatTimerSetRelativeStPendResched;
568 STAMCOUNTER StatTimerSetRelativeStOther;
569 /** @} */
570 /** TMTimerStop
571 * @{ */
572 STAMPROFILE StatTimerStopRZ;
573 STAMPROFILE StatTimerStopR3;
574 /** @} */
575 /** VirtualSync - Running and Catching Up
576 * @{ */
577 STAMCOUNTER StatVirtualSyncRun;
578 STAMCOUNTER StatVirtualSyncRunRestart;
579 STAMPROFILE StatVirtualSyncRunSlack;
580 STAMCOUNTER StatVirtualSyncRunStop;
581 STAMCOUNTER StatVirtualSyncRunStoppedAlready;
582 STAMCOUNTER StatVirtualSyncGiveUp;
583 STAMCOUNTER StatVirtualSyncGiveUpBeforeStarting;
584 STAMPROFILEADV StatVirtualSyncCatchup;
585 STAMCOUNTER aStatVirtualSyncCatchupInitial[TM_MAX_CATCHUP_PERIODS];
586 STAMCOUNTER aStatVirtualSyncCatchupAdjust[TM_MAX_CATCHUP_PERIODS];
587 /** @} */
588 /** TMR3VirtualSyncFF (non dedicated EMT). */
589 STAMPROFILE StatVirtualSyncFF;
590 /** The timer callback. */
591 STAMCOUNTER StatTimerCallbackSetFF;
592
593 /** Calls to TMCpuTickSet. */
594 STAMCOUNTER StatTSCSet;
595
596 /** @name Reasons for refusing TSC offsetting in TMCpuTickCanUseRealTSC.
597 * @{ */
598 STAMCOUNTER StatTSCNotFixed;
599 STAMCOUNTER StatTSCNotTicking;
600 STAMCOUNTER StatTSCCatchupLE010;
601 STAMCOUNTER StatTSCCatchupLE025;
602 STAMCOUNTER StatTSCCatchupLE100;
603 STAMCOUNTER StatTSCCatchupOther;
604 STAMCOUNTER StatTSCWarp;
605 STAMCOUNTER StatTSCUnderflow;
606 STAMCOUNTER StatTSCSyncNotTicking;
607 /** @} */
608} TM;
609/** Pointer to TM VM instance data. */
610typedef TM *PTM;
611
612/**
613 * TM VMCPU Instance data.
614 * Changes to this must checked against the padding of the tm union in VM!
615 */
616typedef struct TMCPU
617{
618 /** Offset to the VMCPU structure.
619 * See TMCPU2VM(). */
620 RTUINT offVMCPU;
621
622 /** CPU timestamp ticking enabled indicator (bool). (RDTSC) */
623 bool fTSCTicking;
624 bool afAlignment0[3]; /**< alignment padding */
625
626 /** The offset between the raw TSC source and the Guest TSC.
627 * Only valid if fTicking is set and and fTSCUseRealTSC is clear. */
628 uint64_t offTSCRawSrc;
629
630 /** The guest TSC when fTicking is cleared. */
631 uint64_t u64TSC;
632
633 /** The last seen TSC by the guest. */
634 uint64_t u64TSCLastSeen;
635
636#ifndef VBOX_WITHOUT_NS_ACCOUNTING
637 /** The nanosecond timestamp of the CPU start or resume.
638 * This is recalculated when the VM is started so that
639 * cNsTotal = RTTimeNanoTS() - u64NsTsStartCpu. */
640 uint64_t u64NsTsStartTotal;
641 /** The nanosecond timestamp of the last start-execute notification. */
642 uint64_t u64NsTsStartExecuting;
643 /** The nanosecond timestamp of the last start-halt notification. */
644 uint64_t u64NsTsStartHalting;
645 /** The cNsXXX generation. */
646 uint32_t volatile uTimesGen;
647 /** Explicit alignment padding. */
648 uint32_t u32Alignment;
649 /** The number of nanoseconds total run time.
650 * @remarks This is updated when cNsExecuting and cNsHalted are updated. */
651 uint64_t cNsTotal;
652 /** The number of nanoseconds spent executing. */
653 uint64_t cNsExecuting;
654 /** The number of nanoseconds being halted. */
655 uint64_t cNsHalted;
656 /** The number of nanoseconds spent on other things.
657 * @remarks This is updated when cNsExecuting and cNsHalted are updated. */
658 uint64_t cNsOther;
659 /** The number of halts. */
660 uint64_t cPeriodsHalted;
661 /** The number of guest execution runs. */
662 uint64_t cPeriodsExecuting;
663# if defined(VBOX_WITH_STATISTICS) || defined(VBOX_WITH_NS_ACCOUNTING_STATS)
664 /** Resettable version of cNsTotal. */
665 STAMCOUNTER StatNsTotal;
666 /** Resettable version of cNsExecuting. */
667 STAMPROFILE StatNsExecuting;
668 /** Long execution intervals. */
669 STAMPROFILE StatNsExecLong;
670 /** Short execution intervals . */
671 STAMPROFILE StatNsExecShort;
672 /** Tiny execution intervals . */
673 STAMPROFILE StatNsExecTiny;
674 /** Resettable version of cNsHalted. */
675 STAMPROFILE StatNsHalted;
676 /** Resettable version of cNsOther. */
677 STAMPROFILE StatNsOther;
678# endif
679
680 /** CPU load state for this virtual CPU (tmR3CpuLoadTimer). */
681 TMCPULOADSTATE CpuLoad;
682#endif
683} TMCPU;
684/** Pointer to TM VMCPU instance data. */
685typedef TMCPU *PTMCPU;
686
687#if 0 /* enable this to rule out locking bugs on single cpu guests. */
688# define tmTimerLock(pVM) VINF_SUCCESS
689# define tmTimerTryLock(pVM) VINF_SUCCESS
690# define tmTimerUnlock(pVM) ((void)0)
691# define tmVirtualSyncLock(pVM) VINF_SUCCESS
692# define tmVirtualSyncTryLock(pVM) VINF_SUCCESS
693# define tmVirtualSyncUnlock(pVM) ((void)0)
694# define TM_ASSERT_LOCK(pVM) VM_ASSERT_EMT(pVM)
695#else
696int tmTimerLock(PVM pVM);
697int tmTimerTryLock(PVM pVM);
698void tmTimerUnlock(PVM pVM);
699/** Checks that the caller owns the timer lock. */
700#define TM_ASSERT_LOCK(pVM) Assert(PDMCritSectIsOwner(&pVM->tm.s.TimerCritSect))
701int tmVirtualSyncLock(PVM pVM);
702int tmVirtualSyncTryLock(PVM pVM);
703void tmVirtualSyncUnlock(PVM pVM);
704#endif
705
706const char *tmTimerState(TMTIMERSTATE enmState);
707void tmTimerQueueSchedule(PVM pVM, PTMTIMERQUEUE pQueue);
708#ifdef VBOX_STRICT
709void tmTimerQueuesSanityChecks(PVM pVM, const char *pszWhere);
710#endif
711
712int tmCpuTickPause(PVM pVM, PVMCPU pVCpu);
713int tmCpuTickResume(PVM pVM, PVMCPU pVCpu);
714
715int tmVirtualPauseLocked(PVM pVM);
716int tmVirtualResumeLocked(PVM pVM);
717DECLEXPORT(void) tmVirtualNanoTSBad(PRTTIMENANOTSDATA pData, uint64_t u64NanoTS, uint64_t u64DeltaPrev, uint64_t u64PrevNanoTS);
718DECLEXPORT(uint64_t) tmVirtualNanoTSRediscover(PRTTIMENANOTSDATA pData);
719
720
721/** @} */
722
723RT_C_DECLS_END
724
725#endif
726
Note: See TracBrowser for help on using the repository browser.

© 2023 Oracle
Contact – Privacy policy – Terms of Use