TMInternal.h@ 38707

Last change on this file since 38707 was 37527, checked in by vboxsync, 13 years ago
TM: Virtual sync timer locking fixes and assertions.
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1	/* $Id: TMInternal.h 37527 2011-06-17 10:18:02Z 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/vmm/stam.h>
27	#include <VBox/vmm/pdmcritsect.h>
28
29	RT_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	*/
47	typedef enum TMTIMERTYPE
48	{
49	/** Device timer. */
50	TMTIMERTYPE_DEV = 1,
51	/** USB device timer. */
52	TMTIMERTYPE_USB,
53	/** Driver timer. */
54	TMTIMERTYPE_DRV,
55	/** Internal timer . */
56	TMTIMERTYPE_INTERNAL,
57	/** External timer. */
58	TMTIMERTYPE_EXTERNAL
59	} TMTIMERTYPE;
60
61	/**
62	* Timer state
63	*/
64	typedef enum TMTIMERSTATE
65	{
66	/** Timer is stopped. */
67	TMTIMERSTATE_STOPPED = 1,
68	/** Timer is active. */
69	TMTIMERSTATE_ACTIVE,
70	/** Timer is expired, getting expire and unlinking. */
71	TMTIMERSTATE_EXPIRED_GET_UNLINK,
72	/** Timer is expired and is being delivered. */
73	TMTIMERSTATE_EXPIRED_DELIVER,
74
75	/** Timer is stopped but still in the active list.
76	* Currently in the ScheduleTimers list. */
77	TMTIMERSTATE_PENDING_STOP,
78	/** Timer is stopped but needs unlinking from the ScheduleTimers list.
79	* Currently in the ScheduleTimers list. */
80	TMTIMERSTATE_PENDING_STOP_SCHEDULE,
81	/** Timer is being modified and will soon be pending scheduling.
82	* Currently in the ScheduleTimers list. */
83	TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE,
84	/** Timer is pending scheduling.
85	* Currently in the ScheduleTimers list. */
86	TMTIMERSTATE_PENDING_SCHEDULE,
87	/** Timer is being modified and will soon be pending rescheduling.
88	* Currently in the ScheduleTimers list and the active list. */
89	TMTIMERSTATE_PENDING_RESCHEDULE_SET_EXPIRE,
90	/** Timer is modified and is now pending rescheduling.
91	* Currently in the ScheduleTimers list and the active list. */
92	TMTIMERSTATE_PENDING_RESCHEDULE,
93	/** Timer is being destroyed. */
94	TMTIMERSTATE_DESTROY,
95	/** Timer is free. */
96	TMTIMERSTATE_FREE
97	} TMTIMERSTATE;
98
99	/** Predicate that returns true if the give state is pending scheduling or
100	* rescheduling of any kind. Will reference the argument more than once! */
101	#define TMTIMERSTATE_IS_PENDING_SCHEDULING(enmState) \
102	( (enmState) <= TMTIMERSTATE_PENDING_RESCHEDULE \
103	&& (enmState) >= TMTIMERSTATE_PENDING_SCHEDULE_SET_EXPIRE)
104
105
106	/**
107	* Internal representation of a timer.
108	*
109	* For correct serialization (without the use of semaphores and
110	* other blocking/slow constructs) certain rules applies to updating
111	* this structure:
112	* - For thread other than EMT only u64Expire, enmState and pScheduleNext*
113	* are changeable. Everything else is out of bounds.
114	* - Updating of u64Expire timer can only happen in the TMTIMERSTATE_STOPPED
115	* and TMTIMERSTATE_PENDING_RESCHEDULING_SET_EXPIRE states.
116	* - Timers in the TMTIMERSTATE_EXPIRED state are only accessible from EMT.
117	* - Actual destruction of a timer can only be done at scheduling time.
118	*/
119	typedef struct TMTIMER
120	{
121	/** Expire time. */
122	volatile uint64_t u64Expire;
123	/** Clock to apply to u64Expire. */
124	TMCLOCK enmClock;
125	/** Timer callback type. */
126	TMTIMERTYPE enmType;
127	/** Type specific data. */
128	union
129	{
130	/** TMTIMERTYPE_DEV. */
131	struct
132	{
133	/** Callback. */
134	R3PTRTYPE(PFNTMTIMERDEV) pfnTimer;
135	/** Device instance. */
136	PPDMDEVINSR3 pDevIns;
137	} Dev;
138
139	/** TMTIMERTYPE_DEV. */
140	struct
141	{
142	/** Callback. */
143	R3PTRTYPE(PFNTMTIMERUSB) pfnTimer;
144	/** USB device instance. */
145	PPDMUSBINS pUsbIns;
146	} Usb;
147
148	/** TMTIMERTYPE_DRV. */
149	struct
150	{
151	/** Callback. */
152	R3PTRTYPE(PFNTMTIMERDRV) pfnTimer;
153	/** Device instance. */
154	R3PTRTYPE(PPDMDRVINS) pDrvIns;
155	} Drv;
156
157	/** TMTIMERTYPE_INTERNAL. */
158	struct
159	{
160	/** Callback. */
161	R3PTRTYPE(PFNTMTIMERINT) pfnTimer;
162	} Internal;
163
164	/** TMTIMERTYPE_EXTERNAL. */
165	struct
166	{
167	/** Callback. */
168	R3PTRTYPE(PFNTMTIMEREXT) pfnTimer;
169	} External;
170	} u;
171
172	/** Timer state. */
173	volatile TMTIMERSTATE enmState;
174	/** Timer relative offset to the next timer in the schedule list. */
175	int32_t volatile offScheduleNext;
176
177	/** Timer relative offset to the next timer in the chain. */
178	int32_t offNext;
179	/** Timer relative offset to the previous timer in the chain. */
180	int32_t offPrev;
181
182	/** Pointer to the VM the timer belongs to - R3 Ptr. */
183	PVMR3 pVMR3;
184	/** Pointer to the VM the timer belongs to - R0 Ptr. */
185	PVMR0 pVMR0;
186	/** Pointer to the VM the timer belongs to - RC Ptr. */
187	PVMRC pVMRC;
188	/** The timer frequency hint. This is 0 if not hint was given. */
189	uint32_t volatile uHzHint;
190
191	/** User argument. */
192	RTR3PTR pvUser;
193	/** The critical section associated with the lock. */
194	R3PTRTYPE(PPDMCRITSECT) pCritSect;
195
196	/** Pointer to the next timer in the list of created or free timers. (TM::pTimers or TM::pFree) */
197	PTMTIMERR3 pBigNext;
198	/** Pointer to the previous timer in the list of all created timers. (TM::pTimers) */
199	PTMTIMERR3 pBigPrev;
200	/** Pointer to the timer description. */
201	R3PTRTYPE(const char *) pszDesc;
202	#if HC_ARCH_BITS == 32
203	uint32_t padding0; /*< pad structure to multiple of 8 bytes. /
204	#endif
205	} TMTIMER;
206	AssertCompileMemberSize(TMTIMER, enmState, sizeof(uint32_t));
207
208
209	/**
210	* Updates a timer state in the correct atomic manner.
211	*/
212	#if 1
213	# define TM_SET_STATE(pTimer, state) \
214	ASMAtomicWriteU32((uint32_t volatile *)&(pTimer)->enmState, state)
215	#else
216	# define TM_SET_STATE(pTimer, state) \
217	do { \
218	uint32_t uOld1 = (pTimer)->enmState; \
219	Log(("%s: %p: %d -> %d\n", __FUNCTION__, (pTimer), (pTimer)->enmState, state)); \
220	uint32_t uOld2 = ASMAtomicXchgU32((uint32_t volatile *)&(pTimer)->enmState, state); \
221	Assert(uOld1 == uOld2); \
222	} while (0)
223	#endif
224
225	/**
226	* Tries to updates a timer state in the correct atomic manner.
227	*/
228	#if 1
229	# define TM_TRY_SET_STATE(pTimer, StateNew, StateOld, fRc) \
230	(fRc) = ASMAtomicCmpXchgU32((uint32_t volatile *)&(pTimer)->enmState, StateNew, StateOld)
231	#else
232	# define TM_TRY_SET_STATE(pTimer, StateNew, StateOld, fRc) \
233	do { (fRc) = ASMAtomicCmpXchgU32((uint32_t volatile *)&(pTimer)->enmState, StateNew, StateOld); \
234	Log(("%s: %p: %d -> %d %RTbool\n", __FUNCTION__, (pTimer), StateOld, StateNew, fRc)); \
235	} while (0)
236	#endif
237
238	/** Get the previous timer. */
239	#define TMTIMER_GET_PREV(pTimer) ((PTMTIMER)((pTimer)->offPrev ? (intptr_t)(pTimer) + (pTimer)->offPrev : 0))
240	/** Get the next timer. */
241	#define TMTIMER_GET_NEXT(pTimer) ((PTMTIMER)((pTimer)->offNext ? (intptr_t)(pTimer) + (pTimer)->offNext : 0))
242	/** Set the previous timer link. */
243	#define TMTIMER_SET_PREV(pTimer, pPrev) ((pTimer)->offPrev = (pPrev) ? (intptr_t)(pPrev) - (intptr_t)(pTimer) : 0)
244	/** Set the next timer link. */
245	#define TMTIMER_SET_NEXT(pTimer, pNext) ((pTimer)->offNext = (pNext) ? (intptr_t)(pNext) - (intptr_t)(pTimer) : 0)
246
247
248	/**
249	* A timer queue.
250	*
251	* This is allocated on the hyper heap.
252	*/
253	typedef struct TMTIMERQUEUE
254	{
255	/** The cached expire time for this queue.
256	* Updated by EMT when scheduling the queue or modifying the head timer.
257	* Assigned UINT64_MAX when there is no head timer. */
258	uint64_t u64Expire;
259	/** Doubly linked list of active timers.
260	*
261	* When no scheduling is pending, this list is will be ordered by expire time (ascending).
262	* Access is serialized by only letting the emulation thread (EMT) do changes.
263	*
264	* The offset is relative to the queue structure.
265	*/
266	int32_t offActive;
267	/** List of timers pending scheduling of some kind.
268	*
269	* Timer stats allowed in the list are TMTIMERSTATE_PENDING_STOPPING,
270	* TMTIMERSTATE_PENDING_DESTRUCTION, TMTIMERSTATE_PENDING_STOPPING_DESTRUCTION,
271	* TMTIMERSTATE_PENDING_RESCHEDULING and TMTIMERSTATE_PENDING_SCHEDULE.
272	*
273	* The offset is relative to the queue structure.
274	*/
275	int32_t volatile offSchedule;
276	/** The clock for this queue. */
277	TMCLOCK enmClock;
278	/** Pad the structure up to 32 bytes. */
279	uint32_t au32Padding[3];
280	} TMTIMERQUEUE;
281
282	/** Pointer to a timer queue. */
283	typedef TMTIMERQUEUE *PTMTIMERQUEUE;
284
285	/** Get the head of the active timer list. */
286	#define TMTIMER_GET_HEAD(pQueue) ((PTMTIMER)((pQueue)->offActive ? (intptr_t)(pQueue) + (pQueue)->offActive : 0))
287	/** Set the head of the active timer list. */
288	#define TMTIMER_SET_HEAD(pQueue, pHead) ((pQueue)->offActive = pHead ? (intptr_t)pHead - (intptr_t)(pQueue) : 0)
289
290
291	/**
292	* CPU load data set.
293	* Mainly used by tmR3CpuLoadTimer.
294	*/
295	typedef struct TMCPULOADSTATE
296	{
297	/** The percent of the period spent executing guest code. */
298	uint8_t cPctExecuting;
299	/** The percent of the period spent halted. */
300	uint8_t cPctHalted;
301	/** The percent of the period spent on other things. */
302	uint8_t cPctOther;
303	/** Explicit alignment padding */
304	uint8_t au8Alignment[5];
305
306	/** Previous cNsTotal value. */
307	uint64_t cNsPrevTotal;
308	/** Previous cNsExecuting value. */
309	uint64_t cNsPrevExecuting;
310	/** Previous cNsHalted value. */
311	uint64_t cNsPrevHalted;
312	} TMCPULOADSTATE;
313	AssertCompileSizeAlignment(TMCPULOADSTATE, 8);
314	AssertCompileMemberAlignment(TMCPULOADSTATE, cNsPrevTotal, 8);
315	/** Pointer to a CPU load data set. */
316	typedef TMCPULOADSTATE *PTMCPULOADSTATE;
317
318	/**
319	* Converts a TM pointer into a VM pointer.
320	* @returns Pointer to the VM structure the TM is part of.
321	* @param pTM Pointer to TM instance data.
322	*/
323	#define TM2VM(pTM) ( (PVM)((char*)pTM - pTM->offVM) )
324
325
326	/**
327	* TM VM Instance data.
328	* Changes to this must checked against the padding of the cfgm union in VM!
329	*/
330	typedef struct TM
331	{
332	/** Offset to the VM structure.
333	* See TM2VM(). */
334	RTUINT offVM;
335
336	/** Set if we fully virtualize the TSC, i.e. intercept all rdtsc instructions.
337	* Config variable: TSCVirtualized (bool) */
338	bool fTSCVirtualized;
339	/** Set if we use the real TSC as time source or if we use the virtual clock.
340	* If fTSCVirtualized is set we maintain a offset to the TSC and pausing/resuming the
341	* ticking. fTSCVirtualized = false implies fTSCUseRealTSC = true.
342	* Config variable: TSCUseRealTSC (bool) */
343	bool fTSCUseRealTSC;
344	/** Flag indicating that the host TSC is suitable for use in AMD-V and VT-x mode.
345	* Config variable: MaybeUseOffsettedHostTSC (boolean) */
346	bool fMaybeUseOffsettedHostTSC;
347	/** Whether the TSC is tied to the execution of code.
348	* Config variable: TSCTiedToExecution (bool) */
349	bool fTSCTiedToExecution;
350	/** Modifier for fTSCTiedToExecution which pauses the TSC while halting if true.
351	* Config variable: TSCNotTiedToHalt (bool) */
352	bool fTSCNotTiedToHalt;
353	bool afAlignment0[2]; /*< alignment padding /
354	/** The ID of the virtual CPU that normally runs the timers. */
355	VMCPUID idTimerCpu;
356	/** The number of CPU clock ticks per second (TMCLOCK_TSC).
357	* Config variable: TSCTicksPerSecond (64-bit unsigned int)
358	* The config variable implies fTSCVirtualized = true and fTSCUseRealTSC = false. */
359	uint64_t cTSCTicksPerSecond;
360
361	/** Virtual time ticking enabled indicator (counter for each VCPU). (TMCLOCK_VIRTUAL) */
362	uint32_t volatile cVirtualTicking;
363	/** Virtual time is not running at 100%. */
364	bool fVirtualWarpDrive;
365	/** Virtual timer synchronous time ticking enabled indicator (bool). (TMCLOCK_VIRTUAL_SYNC) */
366	bool volatile fVirtualSyncTicking;
367	/** Virtual timer synchronous time catch-up active. */
368	bool volatile fVirtualSyncCatchUp;
369	bool afAlignment1[5]; /*< alignment padding /
370	/** WarpDrive percentage.
371	* 100% is normal (fVirtualSyncNormal == true). When other than 100% we apply
372	* this percentage to the raw time source for the period it's been valid in,
373	* i.e. since u64VirtualWarpDriveStart. */
374	uint32_t u32VirtualWarpDrivePercentage;
375
376	/** The offset of the virtual clock relative to it's timesource.
377	* Only valid if fVirtualTicking is set. */
378	uint64_t u64VirtualOffset;
379	/** The guest virtual time when fVirtualTicking is cleared. */
380	uint64_t u64Virtual;
381	/** When the Warp drive was started or last adjusted.
382	* Only valid when fVirtualWarpDrive is set. */
383	uint64_t u64VirtualWarpDriveStart;
384	/** The previously returned nano TS.
385	* This handles TSC drift on SMP systems and expired interval.
386	* This is a valid range u64NanoTS to u64NanoTS + 1000000000 (ie. 1sec). */
387	uint64_t volatile u64VirtualRawPrev;
388	/** The ring-3 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
389	RTTIMENANOTSDATAR3 VirtualGetRawDataR3;
390	/** The ring-0 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
391	RTTIMENANOTSDATAR0 VirtualGetRawDataR0;
392	/** The ring-0 data structure for the RTTimeNanoTS workers used by tmVirtualGetRawNanoTS. */
393	RTTIMENANOTSDATARC VirtualGetRawDataRC;
394	/** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
395	R3PTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawR3;
396	/** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
397	R0PTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawR0;
398	/** Pointer to the ring-3 tmVirtualGetRawNanoTS worker function. */
399	RCPTRTYPE(PFNTIMENANOTSINTERNAL) pfnVirtualGetRawRC;
400	/** Alignment. */
401	RTRCPTR AlignmentRCPtr;
402	/** The guest virtual timer synchronous time when fVirtualSyncTicking is cleared.
403	* When fVirtualSyncTicking is set it holds the last time returned to
404	* the guest (while the lock was held). */
405	uint64_t volatile u64VirtualSync;
406	/** The offset of the timer synchronous virtual clock (TMCLOCK_VIRTUAL_SYNC) relative
407	* to the virtual clock (TMCLOCK_VIRTUAL).
408	* (This is accessed by the timer thread and must be updated atomically.) */
409	uint64_t volatile offVirtualSync;
410	/** The offset into offVirtualSync that's been irrevocably given up by failed catch-up attempts.
411	* Thus the current lag is offVirtualSync - offVirtualSyncGivenUp. */
412	uint64_t offVirtualSyncGivenUp;
413	/** The TMCLOCK_VIRTUAL at the previous TMVirtualGetSync call when catch-up is active. */
414	uint64_t volatile u64VirtualSyncCatchUpPrev;
415	/** The current catch-up percentage. */
416	uint32_t volatile u32VirtualSyncCatchUpPercentage;
417	/** How much slack when processing timers. */
418	uint32_t u32VirtualSyncScheduleSlack;
419	/** When to stop catch-up. */
420	uint64_t u64VirtualSyncCatchUpStopThreshold;
421	/** When to give up catch-up. */
422	uint64_t u64VirtualSyncCatchUpGiveUpThreshold;
423	/** @def TM_MAX_CATCHUP_PERIODS
424	* The number of catchup rates. */
425	#define TM_MAX_CATCHUP_PERIODS 10
426	/** The aggressiveness of the catch-up relative to how far we've lagged behind.
427	* The idea is to have increasing catch-up percentage as the lag increases. */
428	struct TMCATCHUPPERIOD
429	{
430	uint64_t u64Start; /*< When this period starts. (u64VirtualSyncOffset). /
431	uint32_t u32Percentage; /*< The catch-up percent to apply. /
432	uint32_t u32Alignment; /*< Structure alignment /
433	} aVirtualSyncCatchUpPeriods[TM_MAX_CATCHUP_PERIODS];
434
435	/** The current max timer Hz hint. */
436	uint32_t volatile uMaxHzHint;
437	/** Whether to recalulate the HzHint next time its queried. */
438	bool volatile fHzHintNeedsUpdating;
439	/** Alignment */
440	bool afAlignment2[3];
441	/** @cfgm{TM/HostHzMax, uint32_t, Hz, 0, UINT32_MAX, 20000}
442	* The max host Hz frequency hint returned by TMCalcHostTimerFrequency. */
443	uint32_t cHostHzMax;
444	/** @cfgm{TM/HostHzFudgeFactorTimerCpu, uint32_t, Hz, 0, UINT32_MAX, 111}
445	* The number of Hz TMCalcHostTimerFrequency adds for the timer CPU. */
446	uint32_t cPctHostHzFudgeFactorTimerCpu;
447	/** @cfgm{TM/HostHzFudgeFactorOtherCpu, uint32_t, Hz, 0, UINT32_MAX, 110}
448	* The number of Hz TMCalcHostTimerFrequency adds for the other CPUs. */
449	uint32_t cPctHostHzFudgeFactorOtherCpu;
450	/** @cfgm{TM/HostHzFudgeFactorCatchUp100, uint32_t, Hz, 0, UINT32_MAX, 300}
451	* The fudge factor (expressed in percent) that catch-up percentages below
452	* 100% is multiplied by. */
453	uint32_t cPctHostHzFudgeFactorCatchUp100;
454	/** @cfgm{TM/HostHzFudgeFactorCatchUp200, uint32_t, Hz, 0, UINT32_MAX, 250}
455	* The fudge factor (expressed in percent) that catch-up percentages
456	* 100%-199% is multiplied by. */
457	uint32_t cPctHostHzFudgeFactorCatchUp200;
458	/** @cfgm{TM/HostHzFudgeFactorCatchUp400, uint32_t, Hz, 0, UINT32_MAX, 200}
459	* The fudge factor (expressed in percent) that catch-up percentages
460	* 200%-399% is multiplied by. */
461	uint32_t cPctHostHzFudgeFactorCatchUp400;
462
463	/** The UTC offset in ns.
464	* This is NOT for converting UTC to local time. It is for converting real
465	* world UTC time to VM UTC time. This feature is indented for doing date
466	* testing of software and similar.
467	* @todo Implement warpdrive on UTC. */
468	int64_t offUTC;
469
470	/** Timer queues for the different clock types - R3 Ptr */
471	R3PTRTYPE(PTMTIMERQUEUE) paTimerQueuesR3;
472	/** Timer queues for the different clock types - R0 Ptr */
473	R0PTRTYPE(PTMTIMERQUEUE) paTimerQueuesR0;
474	/** Timer queues for the different clock types - RC Ptr */
475	RCPTRTYPE(PTMTIMERQUEUE) paTimerQueuesRC;
476
477	/** Pointer to our RC mapping of the GIP. */
478	RCPTRTYPE(void *) pvGIPRC;
479	/** Pointer to our R3 mapping of the GIP. */
480	R3PTRTYPE(void *) pvGIPR3;
481
482	/** Pointer to a singly linked list of free timers.
483	* This chain is using the TMTIMER::pBigNext members.
484	* Only accessible from the emulation thread. */
485	PTMTIMERR3 pFree;
486
487	/** Pointer to a doubly linked list of created timers.
488	* This chain is using the TMTIMER::pBigNext and TMTIMER::pBigPrev members.
489	* Only accessible from the emulation thread. */
490	PTMTIMERR3 pCreated;
491
492	/** The schedule timer timer handle (runtime timer).
493	* This timer will do frequent check on pending queue schedules and
494	* raise VM_FF_TIMER to pull EMTs attention to them.
495	*/
496	R3PTRTYPE(PRTTIMER) pTimer;
497	/** Interval in milliseconds of the pTimer timer. */
498	uint32_t u32TimerMillies;
499
500	/** Indicates that queues are being run. */
501	bool volatile fRunningQueues;
502	/** Indicates that the virtual sync queue is being run. */
503	bool volatile fRunningVirtualSyncQueue;
504	/** Alignment */
505	bool afAlignment3[2];
506
507	/** Lock serializing access to the timer lists. */
508	PDMCRITSECT TimerCritSect;
509	/** Lock serializing access to the VirtualSync clock and the associated
510	* timer queue. */
511	PDMCRITSECT VirtualSyncLock;
512
513	/** CPU load state for all the virtual CPUs (tmR3CpuLoadTimer). */
514	TMCPULOADSTATE CpuLoad;
515
516	/** TMR3TimerQueuesDo
517	* @{ */
518	STAMPROFILE StatDoQueues;
519	STAMPROFILEADV aStatDoQueues[TMCLOCK_MAX];
520	/** @} */
521	/** tmSchedule
522	* @{ */
523	STAMPROFILE StatScheduleOneRZ;
524	STAMPROFILE StatScheduleOneR3;
525	STAMCOUNTER StatScheduleSetFF;
526	STAMCOUNTER StatPostponedR3;
527	STAMCOUNTER StatPostponedRZ;
528	/** @} */
529	/** Read the time
530	* @{ */
531	STAMCOUNTER StatVirtualGet;
532	STAMCOUNTER StatVirtualGetSetFF;
533	STAMCOUNTER StatVirtualSyncGet;
534	STAMCOUNTER StatVirtualSyncGetAdjLast;
535	STAMCOUNTER StatVirtualSyncGetELoop;
536	STAMCOUNTER StatVirtualSyncGetExpired;
537	STAMCOUNTER StatVirtualSyncGetLockless;
538	STAMCOUNTER StatVirtualSyncGetLocked;
539	STAMCOUNTER StatVirtualSyncGetSetFF;
540	STAMCOUNTER StatVirtualPause;
541	STAMCOUNTER StatVirtualResume;
542	/** @} */
543	/** TMTimerPoll
544	* @{ */
545	STAMCOUNTER StatPoll;
546	STAMCOUNTER StatPollAlreadySet;
547	STAMCOUNTER StatPollELoop;
548	STAMCOUNTER StatPollMiss;
549	STAMCOUNTER StatPollRunning;
550	STAMCOUNTER StatPollSimple;
551	STAMCOUNTER StatPollVirtual;
552	STAMCOUNTER StatPollVirtualSync;
553	/** @} */
554	/** TMTimerSet sans virtual sync timers.
555	* @{ */
556	STAMCOUNTER StatTimerSet;
557	STAMCOUNTER StatTimerSetOpt;
558	STAMPROFILE StatTimerSetRZ;
559	STAMPROFILE StatTimerSetR3;
560	STAMCOUNTER StatTimerSetStStopped;
561	STAMCOUNTER StatTimerSetStExpDeliver;
562	STAMCOUNTER StatTimerSetStActive;
563	STAMCOUNTER StatTimerSetStPendStop;
564	STAMCOUNTER StatTimerSetStPendStopSched;
565	STAMCOUNTER StatTimerSetStPendSched;
566	STAMCOUNTER StatTimerSetStPendResched;
567	STAMCOUNTER StatTimerSetStOther;
568	/** @} */
569	/** TMTimerSet on virtual sync timers.
570	* @{ */
571	STAMCOUNTER StatTimerSetVs;
572	STAMPROFILE StatTimerSetVsRZ;
573	STAMPROFILE StatTimerSetVsR3;
574	STAMCOUNTER StatTimerSetVsStStopped;
575	STAMCOUNTER StatTimerSetVsStExpDeliver;
576	STAMCOUNTER StatTimerSetVsStActive;
577	/** @} */
578	/** TMTimerSetRelative sans virtual sync timers
579	* @{ */
580	STAMCOUNTER StatTimerSetRelative;
581	STAMPROFILE StatTimerSetRelativeRZ;
582	STAMPROFILE StatTimerSetRelativeR3;
583	STAMCOUNTER StatTimerSetRelativeOpt;
584	STAMCOUNTER StatTimerSetRelativeStStopped;
585	STAMCOUNTER StatTimerSetRelativeStExpDeliver;
586	STAMCOUNTER StatTimerSetRelativeStActive;
587	STAMCOUNTER StatTimerSetRelativeStPendStop;
588	STAMCOUNTER StatTimerSetRelativeStPendStopSched;
589	STAMCOUNTER StatTimerSetRelativeStPendSched;
590	STAMCOUNTER StatTimerSetRelativeStPendResched;
591	STAMCOUNTER StatTimerSetRelativeStOther;
592	/** @} */
593	/** TMTimerSetRelative on virtual sync timers.
594	* @{ */
595	STAMCOUNTER StatTimerSetRelativeVs;
596	STAMPROFILE StatTimerSetRelativeVsRZ;
597	STAMPROFILE StatTimerSetRelativeVsR3;
598	STAMCOUNTER StatTimerSetRelativeVsStStopped;
599	STAMCOUNTER StatTimerSetRelativeVsStExpDeliver;
600	STAMCOUNTER StatTimerSetRelativeVsStActive;
601	/** @} */
602	/** TMTimerStop sans virtual sync.
603	* @{ */
604	STAMPROFILE StatTimerStopRZ;
605	STAMPROFILE StatTimerStopR3;
606	/** @} */
607	/** TMTimerStop on virtual sync timers.
608	* @{ */
609	STAMPROFILE StatTimerStopVsRZ;
610	STAMPROFILE StatTimerStopVsR3;
611	/** @} */
612	/** VirtualSync - Running and Catching Up
613	* @{ */
614	STAMCOUNTER StatVirtualSyncRun;
615	STAMCOUNTER StatVirtualSyncRunRestart;
616	STAMPROFILE StatVirtualSyncRunSlack;
617	STAMCOUNTER StatVirtualSyncRunStop;
618	STAMCOUNTER StatVirtualSyncRunStoppedAlready;
619	STAMCOUNTER StatVirtualSyncGiveUp;
620	STAMCOUNTER StatVirtualSyncGiveUpBeforeStarting;
621	STAMPROFILEADV StatVirtualSyncCatchup;
622	STAMCOUNTER aStatVirtualSyncCatchupInitial[TM_MAX_CATCHUP_PERIODS];
623	STAMCOUNTER aStatVirtualSyncCatchupAdjust[TM_MAX_CATCHUP_PERIODS];
624	/** @} */
625	/** TMR3VirtualSyncFF (non dedicated EMT). */
626	STAMPROFILE StatVirtualSyncFF;
627	/** The timer callback. */
628	STAMCOUNTER StatTimerCallbackSetFF;
629
630	/** Calls to TMCpuTickSet. */
631	STAMCOUNTER StatTSCSet;
632
633	/** @name Reasons for refusing TSC offsetting in TMCpuTickCanUseRealTSC.
634	* @{ */
635	STAMCOUNTER StatTSCNotFixed;
636	STAMCOUNTER StatTSCNotTicking;
637	STAMCOUNTER StatTSCCatchupLE010;
638	STAMCOUNTER StatTSCCatchupLE025;
639	STAMCOUNTER StatTSCCatchupLE100;
640	STAMCOUNTER StatTSCCatchupOther;
641	STAMCOUNTER StatTSCWarp;
642	STAMCOUNTER StatTSCUnderflow;
643	STAMCOUNTER StatTSCSyncNotTicking;
644	/** @} */
645	} TM;
646	/** Pointer to TM VM instance data. */
647	typedef TM *PTM;
648
649	/**
650	* TM VMCPU Instance data.
651	* Changes to this must checked against the padding of the tm union in VM!
652	*/
653	typedef struct TMCPU
654	{
655	/** Offset to the VMCPU structure.
656	* See TMCPU2VM(). */
657	RTUINT offVMCPU;
658
659	/** CPU timestamp ticking enabled indicator (bool). (RDTSC) */
660	bool fTSCTicking;
661	bool afAlignment0[3]; /*< alignment padding /
662
663	/** The offset between the raw TSC source and the Guest TSC.
664	* Only valid if fTicking is set and and fTSCUseRealTSC is clear. */
665	uint64_t offTSCRawSrc;
666
667	/** The guest TSC when fTicking is cleared. */
668	uint64_t u64TSC;
669
670	/** The last seen TSC by the guest. */
671	uint64_t u64TSCLastSeen;
672
673	#ifndef VBOX_WITHOUT_NS_ACCOUNTING
674	/** The nanosecond timestamp of the CPU start or resume.
675	* This is recalculated when the VM is started so that
676	* cNsTotal = RTTimeNanoTS() - u64NsTsStartCpu. */
677	uint64_t u64NsTsStartTotal;
678	/** The nanosecond timestamp of the last start-execute notification. */
679	uint64_t u64NsTsStartExecuting;
680	/** The nanosecond timestamp of the last start-halt notification. */
681	uint64_t u64NsTsStartHalting;
682	/** The cNsXXX generation. */
683	uint32_t volatile uTimesGen;
684	/** Explicit alignment padding. */
685	uint32_t u32Alignment;
686	/** The number of nanoseconds total run time.
687	* @remarks This is updated when cNsExecuting and cNsHalted are updated. */
688	uint64_t cNsTotal;
689	/** The number of nanoseconds spent executing. */
690	uint64_t cNsExecuting;
691	/** The number of nanoseconds being halted. */
692	uint64_t cNsHalted;
693	/** The number of nanoseconds spent on other things.
694	* @remarks This is updated when cNsExecuting and cNsHalted are updated. */
695	uint64_t cNsOther;
696	/** The number of halts. */
697	uint64_t cPeriodsHalted;
698	/** The number of guest execution runs. */
699	uint64_t cPeriodsExecuting;
700	# if defined(VBOX_WITH_STATISTICS) \|\| defined(VBOX_WITH_NS_ACCOUNTING_STATS)
701	/** Resettable version of cNsTotal. */
702	STAMCOUNTER StatNsTotal;
703	/** Resettable version of cNsExecuting. */
704	STAMPROFILE StatNsExecuting;
705	/** Long execution intervals. */
706	STAMPROFILE StatNsExecLong;
707	/** Short execution intervals . */
708	STAMPROFILE StatNsExecShort;
709	/** Tiny execution intervals . */
710	STAMPROFILE StatNsExecTiny;
711	/** Resettable version of cNsHalted. */
712	STAMPROFILE StatNsHalted;
713	/** Resettable version of cNsOther. */
714	STAMPROFILE StatNsOther;
715	# endif
716
717	/** CPU load state for this virtual CPU (tmR3CpuLoadTimer). */
718	TMCPULOADSTATE CpuLoad;
719	#endif
720	} TMCPU;
721	/** Pointer to TM VMCPU instance data. */
722	typedef TMCPU *PTMCPU;
723
724	const char *tmTimerState(TMTIMERSTATE enmState);
725	void tmTimerQueueSchedule(PVM pVM, PTMTIMERQUEUE pQueue);
726	#ifdef VBOX_STRICT
727	void tmTimerQueuesSanityChecks(PVM pVM, const char *pszWhere);
728	#endif
729
730	int tmCpuTickPause(PVM pVM, PVMCPU pVCpu);
731	int tmCpuTickResume(PVM pVM, PVMCPU pVCpu);
732
733	int tmVirtualPauseLocked(PVM pVM);
734	int tmVirtualResumeLocked(PVM pVM);
735	DECLEXPORT(void) tmVirtualNanoTSBad(PRTTIMENANOTSDATA pData, uint64_t u64NanoTS, uint64_t u64DeltaPrev, uint64_t u64PrevNanoTS);
736	DECLEXPORT(uint64_t) tmVirtualNanoTSRediscover(PRTTIMENANOTSDATA pData);
737
738
739	/**
740	* Try take the timer lock, wait in ring-3 return VERR_SEM_BUSY in R0/RC.
741	*
742	* @retval VINF_SUCCESS on success (always in ring-3).
743	* @retval VERR_SEM_BUSY in RC and R0 if the semaphore is busy.
744	*
745	* @param a_pVM The VM handle.
746	*
747	* @remarks The virtual sync timer queue requires the virtual sync lock.
748	*/
749	#define TM_LOCK_TIMERS(a_pVM) PDMCritSectEnter(&(a_pVM)->tm.s.TimerCritSect, VERR_SEM_BUSY)
750
751	/**
752	* Try take the timer lock, no waiting.
753	*
754	* @retval VINF_SUCCESS on success.
755	* @retval VERR_SEM_BUSY if busy.
756	*
757	* @param a_pVM The VM handle.
758	*
759	* @remarks The virtual sync timer queue requires the virtual sync lock.
760	*/
761	#define TM_TRY_LOCK_TIMERS(a_pVM) PDMCritSectTryEnter(&(a_pVM)->tm.s.TimerCritSect)
762
763	/** Lock the timers (sans the virtual sync queue). */
764	#define TM_UNLOCK_TIMERS(a_pVM) do { PDMCritSectLeave(&(a_pVM)->tm.s.TimerCritSect); } while (0)
765
766	/** Checks that the caller owns the timer lock. */
767	#define TM_ASSERT_TIMER_LOCK_OWNERSHIP(a_pVM) \
768	Assert(PDMCritSectIsOwner(&(a_pVM)->tm.s.TimerCritSect))
769
770
771	/** @} */
772
773	RT_C_DECLS_END
774
775	#endif
776

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source: vbox/trunk/src/VBox/VMM/include/TMInternal.h@ 38707

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