PerformanceImpl.cpp@ 36839

Last change on this file since 36839 was 36839, checked in by vboxsync, 14 years ago
Main/Metrics: Locking revised to prevent lockups on VM shutdown (#5637)
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1	/* $Id: PerformanceImpl.cpp 36839 2011-04-25 17:29:21Z vboxsync $ */
2
3	/** @file
4	*
5	* VBox Performance API COM Classes implementation
6	*/
7
8	/*
9	* Copyright (C) 2008-2010 Oracle Corporation
10	*
11	* This file is part of VirtualBox Open Source Edition (OSE), as
12	* available from http://www.215389.xyz. This file is free software;
13	* you can redistribute it and/or modify it under the terms of the GNU
14	* General Public License (GPL) as published by the Free Software
15	* Foundation, in version 2 as it comes in the "COPYING" file of the
16	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
17	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
18	*/
19
20	/*
21	* Rules of engagement:
22	* 1) All performance objects must be destroyed by PerformanceCollector only!
23	* 2) All public methods of PerformanceCollector must be protected with
24	* read or write lock.
25	* 3) samplerCallback only uses the write lock during the third phase
26	* which pulls data into SubMetric objects. This is where object destruction
27	* and all list modifications are done. The pre-collection phases are
28	* run without any locks which is only possible because:
29	* 4) Public methods of PerformanceCollector as well as pre-collection methods
30	cannot modify lists or destroy objects, and:
31	* 5) Pre-collection methods cannot modify metric data.
32	*/
33
34	#include "PerformanceImpl.h"
35
36	#include "AutoCaller.h"
37	#include "Logging.h"
38
39	#include <iprt/process.h>
40
41	#include <VBox/err.h>
42	#include <VBox/settings.h>
43
44	#include <vector>
45	#include <algorithm>
46	#include <functional>
47
48	#include "Performance.h"
49
50	static const char *g_papcszMetricNames[] =
51	{
52	"CPU/Load/User",
53	"CPU/Load/User:avg",
54	"CPU/Load/User:min",
55	"CPU/Load/User:max",
56	"CPU/Load/Kernel",
57	"CPU/Load/Kernel:avg",
58	"CPU/Load/Kernel:min",
59	"CPU/Load/Kernel:max",
60	"CPU/Load/Idle",
61	"CPU/Load/Idle:avg",
62	"CPU/Load/Idle:min",
63	"CPU/Load/Idle:max",
64	"CPU/MHz",
65	"CPU/MHz:avg",
66	"CPU/MHz:min",
67	"CPU/MHz:max",
68	"RAM/Usage/Total",
69	"RAM/Usage/Total:avg",
70	"RAM/Usage/Total:min",
71	"RAM/Usage/Total:max",
72	"RAM/Usage/Used",
73	"RAM/Usage/Used:avg",
74	"RAM/Usage/Used:min",
75	"RAM/Usage/Used:max",
76	"RAM/Usage/Free",
77	"RAM/Usage/Free:avg",
78	"RAM/Usage/Free:min",
79	"RAM/Usage/Free:max",
80	"RAM/VMM/Used",
81	"RAM/VMM/Used:avg",
82	"RAM/VMM/Used:min",
83	"RAM/VMM/Used:max",
84	"RAM/VMM/Free",
85	"RAM/VMM/Free:avg",
86	"RAM/VMM/Free:min",
87	"RAM/VMM/Free:max",
88	"RAM/VMM/Ballooned",
89	"RAM/VMM/Ballooned:avg",
90	"RAM/VMM/Ballooned:min",
91	"RAM/VMM/Ballooned:max",
92	"RAM/VMM/Shared",
93	"RAM/VMM/Shared:avg",
94	"RAM/VMM/Shared:min",
95	"RAM/VMM/Shared:max",
96	"Guest/CPU/Load/User",
97	"Guest/CPU/Load/User:avg",
98	"Guest/CPU/Load/User:min",
99	"Guest/CPU/Load/User:max",
100	"Guest/CPU/Load/Kernel",
101	"Guest/CPU/Load/Kernel:avg",
102	"Guest/CPU/Load/Kernel:min",
103	"Guest/CPU/Load/Kernel:max",
104	"Guest/CPU/Load/Idle",
105	"Guest/CPU/Load/Idle:avg",
106	"Guest/CPU/Load/Idle:min",
107	"Guest/CPU/Load/Idle:max",
108	"Guest/RAM/Usage/Total",
109	"Guest/RAM/Usage/Total:avg",
110	"Guest/RAM/Usage/Total:min",
111	"Guest/RAM/Usage/Total:max",
112	"Guest/RAM/Usage/Free",
113	"Guest/RAM/Usage/Free:avg",
114	"Guest/RAM/Usage/Free:min",
115	"Guest/RAM/Usage/Free:max",
116	"Guest/RAM/Usage/Balloon",
117	"Guest/RAM/Usage/Balloon:avg",
118	"Guest/RAM/Usage/Balloon:min",
119	"Guest/RAM/Usage/Balloon:max",
120	"Guest/RAM/Usage/Shared",
121	"Guest/RAM/Usage/Shared:avg",
122	"Guest/RAM/Usage/Shared:min",
123	"Guest/RAM/Usage/Shared:max",
124	"Guest/RAM/Usage/Cache",
125	"Guest/RAM/Usage/Cache:avg",
126	"Guest/RAM/Usage/Cache:min",
127	"Guest/RAM/Usage/Cache:max",
128	"Guest/Pagefile/Usage/Total",
129	"Guest/Pagefile/Usage/Total:avg",
130	"Guest/Pagefile/Usage/Total:min",
131	"Guest/Pagefile/Usage/Total:max",
132	};
133
134	////////////////////////////////////////////////////////////////////////////////
135	// PerformanceCollector class
136	////////////////////////////////////////////////////////////////////////////////
137
138	// constructor / destructor
139	////////////////////////////////////////////////////////////////////////////////
140
141	PerformanceCollector::PerformanceCollector() : mMagic(0) {}
142
143	PerformanceCollector::~PerformanceCollector() {}
144
145	HRESULT PerformanceCollector::FinalConstruct()
146	{
147	LogFlowThisFunc(("\n"));
148
149	return BaseFinalConstruct();
150	}
151
152	void PerformanceCollector::FinalRelease()
153	{
154	LogFlowThisFunc(("\n"));
155	BaseFinalRelease();
156	}
157
158	// public initializer/uninitializer for internal purposes only
159	////////////////////////////////////////////////////////////////////////////////
160
161	/**
162	* Initializes the PerformanceCollector object.
163	*/
164	HRESULT PerformanceCollector::init()
165	{
166	/* Enclose the state transition NotReady->InInit->Ready */
167	AutoInitSpan autoInitSpan(this);
168	AssertReturn(autoInitSpan.isOk(), E_FAIL);
169
170	LogFlowThisFuncEnter();
171
172	HRESULT rc = S_OK;
173
174	m.hal = pm::createHAL();
175	m.gm = new pm::CollectorGuestManager;
176
177	/* Let the sampler know it gets a valid collector. */
178	mMagic = MAGIC;
179
180	/* Start resource usage sampler */
181	int vrc = RTTimerLRCreate (&m.sampler, VBOX_USAGE_SAMPLER_MIN_INTERVAL,
182	&PerformanceCollector::staticSamplerCallback, this);
183	AssertMsgRC (vrc, ("Failed to create resource usage "
184	"sampling timer(%Rra)\n", vrc));
185	if (RT_FAILURE(vrc))
186	rc = E_FAIL;
187
188	if (SUCCEEDED(rc))
189	autoInitSpan.setSucceeded();
190
191	LogFlowThisFuncLeave();
192
193	return rc;
194	}
195
196	/**
197	* Uninitializes the PerformanceCollector object.
198	*
199	* Called either from FinalRelease() or by the parent when it gets destroyed.
200	*/
201	void PerformanceCollector::uninit()
202	{
203	LogFlowThisFuncEnter();
204
205	/* Enclose the state transition Ready->InUninit->NotReady */
206	AutoUninitSpan autoUninitSpan(this);
207	if (autoUninitSpan.uninitDone())
208	{
209	LogFlowThisFunc(("Already uninitialized.\n"));
210	LogFlowThisFuncLeave();
211	return;
212	}
213
214	mMagic = 0;
215
216	/* Destroy unregistered metrics */
217	BaseMetricList::iterator it;
218	for (it = m.baseMetrics.begin(); it != m.baseMetrics.end();)
219	if ((*it)->isUnregistered())
220	{
221	delete *it;
222	it = m.baseMetrics.erase(it);
223	}
224	else
225	++it;
226	Assert(m.baseMetrics.size() == 0);
227	/*
228	* Now when we have destroyed all base metrics that could
229	* try to pull data from unregistered CollectorGuest objects
230	* it is safe to destroy them as well.
231	*/
232	m.gm->destroyUnregistered();
233
234	/* Destroy resource usage sampler */
235	int vrc = RTTimerLRDestroy (m.sampler);
236	AssertMsgRC (vrc, ("Failed to destroy resource usage "
237	"sampling timer (%Rra)\n", vrc));
238	m.sampler = NULL;
239
240	//delete m.factory;
241	//m.factory = NULL;
242
243	delete m.gm;
244	m.gm = NULL;
245	delete m.hal;
246	m.hal = NULL;
247
248	LogFlowThisFuncLeave();
249	}
250
251	// IPerformanceCollector properties
252	////////////////////////////////////////////////////////////////////////////////
253
254	STDMETHODIMP PerformanceCollector::COMGETTER(MetricNames)(ComSafeArrayOut(BSTR, theMetricNames))
255	{
256	if (ComSafeArrayOutIsNull(theMetricNames))
257	return E_POINTER;
258
259	AutoCaller autoCaller(this);
260	if (FAILED(autoCaller.rc())) return autoCaller.rc();
261
262	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
263
264	com::SafeArray<BSTR> metricNames(RT_ELEMENTS(g_papcszMetricNames));
265	for (size_t i = 0; i < RT_ELEMENTS(g_papcszMetricNames); i++)
266	{
267	Bstr tmp(g_papcszMetricNames[i]); /* gcc-3.3 cruft */
268	tmp.cloneTo(&metricNames[i]);
269	}
270	//gMetricNames.detachTo(ComSafeArrayOutArg(theMetricNames));
271	metricNames.detachTo(ComSafeArrayOutArg(theMetricNames));
272
273	return S_OK;
274	}
275
276	// IPerformanceCollector methods
277	////////////////////////////////////////////////////////////////////////////////
278
279	HRESULT PerformanceCollector::toIPerformanceMetric(pm::Metric src, IPerformanceMetric *dst)
280	{
281	ComObjPtr<PerformanceMetric> metric;
282	HRESULT rc = metric.createObject();
283	if (SUCCEEDED(rc))
284	rc = metric->init (src);
285	AssertComRCReturnRC(rc);
286	metric.queryInterfaceTo(dst);
287	return rc;
288	}
289
290	HRESULT PerformanceCollector::toIPerformanceMetric(pm::BaseMetric src, IPerformanceMetric *dst)
291	{
292	ComObjPtr<PerformanceMetric> metric;
293	HRESULT rc = metric.createObject();
294	if (SUCCEEDED(rc))
295	rc = metric->init (src);
296	AssertComRCReturnRC(rc);
297	metric.queryInterfaceTo(dst);
298	return rc;
299	}
300
301	STDMETHODIMP PerformanceCollector::GetMetrics(ComSafeArrayIn(IN_BSTR, metricNames),
302	ComSafeArrayIn(IUnknown *, objects),
303	ComSafeArrayOut(IPerformanceMetric *, outMetrics))
304	{
305	LogFlowThisFuncEnter();
306	//LogFlowThisFunc(("mState=%d, mType=%d\n", mState, mType));
307
308	HRESULT rc = S_OK;
309
310	AutoCaller autoCaller(this);
311	if (FAILED(autoCaller.rc())) return autoCaller.rc();
312
313	pm::Filter filter (ComSafeArrayInArg (metricNames),
314	ComSafeArrayInArg (objects));
315
316	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
317
318	MetricList filteredMetrics;
319	MetricList::iterator it;
320	for (it = m.metrics.begin(); it != m.metrics.end(); ++it)
321	if (filter.match ((it)->getObject(), (it)->getName()))
322	filteredMetrics.push_back (*it);
323
324	com::SafeIfaceArray<IPerformanceMetric> retMetrics (filteredMetrics.size());
325	int i = 0;
326	for (it = filteredMetrics.begin(); it != filteredMetrics.end(); ++it)
327	{
328	ComObjPtr<PerformanceMetric> metric;
329	rc = metric.createObject();
330	if (SUCCEEDED(rc))
331	rc = metric->init (*it);
332	AssertComRCReturnRC(rc);
333	LogFlow (("PerformanceCollector::GetMetrics() store a metric at "
334	"retMetrics[%d]...\n", i));
335	metric.queryInterfaceTo(&retMetrics[i++]);
336	}
337	retMetrics.detachTo(ComSafeArrayOutArg(outMetrics));
338	LogFlowThisFuncLeave();
339	return rc;
340	}
341
342	STDMETHODIMP PerformanceCollector::SetupMetrics(ComSafeArrayIn(IN_BSTR, metricNames),
343	ComSafeArrayIn(IUnknown *, objects),
344	ULONG aPeriod,
345	ULONG aCount,
346	ComSafeArrayOut(IPerformanceMetric *, outMetrics))
347	{
348	AutoCaller autoCaller(this);
349	if (FAILED(autoCaller.rc())) return autoCaller.rc();
350
351	pm::Filter filter(ComSafeArrayInArg (metricNames),
352	ComSafeArrayInArg (objects));
353
354	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
355
356	HRESULT rc = S_OK;
357	BaseMetricList filteredMetrics;
358	BaseMetricList::iterator it;
359	for (it = m.baseMetrics.begin(); it != m.baseMetrics.end(); ++it)
360	if (filter.match((it)->getObject(), (it)->getName()))
361	{
362	LogFlow (("PerformanceCollector::SetupMetrics() setting period to %u,"
363	" count to %u for %s\n", aPeriod, aCount, (*it)->getName()));
364	(*it)->init(aPeriod, aCount);
365	if (aPeriod == 0 \|\| aCount == 0)
366	{
367	LogFlow (("PerformanceCollector::SetupMetrics() disabling %s\n",
368	(*it)->getName()));
369	(*it)->disable();
370	}
371	else
372	{
373	LogFlow (("PerformanceCollector::SetupMetrics() enabling %s\n",
374	(*it)->getName()));
375	(*it)->enable();
376	}
377	filteredMetrics.push_back(*it);
378	}
379
380	com::SafeIfaceArray<IPerformanceMetric> retMetrics(filteredMetrics.size());
381	int i = 0;
382	for (it = filteredMetrics.begin();
383	it != filteredMetrics.end() && SUCCEEDED(rc); ++it)
384	rc = toIPerformanceMetric(*it, &retMetrics[i++]);
385	retMetrics.detachTo(ComSafeArrayOutArg(outMetrics));
386
387	LogFlowThisFuncLeave();
388	return rc;
389	}
390
391	STDMETHODIMP PerformanceCollector::EnableMetrics(ComSafeArrayIn(IN_BSTR, metricNames),
392	ComSafeArrayIn(IUnknown *, objects),
393	ComSafeArrayOut(IPerformanceMetric *, outMetrics))
394	{
395	AutoCaller autoCaller(this);
396	if (FAILED(autoCaller.rc())) return autoCaller.rc();
397
398	pm::Filter filter(ComSafeArrayInArg(metricNames),
399	ComSafeArrayInArg(objects));
400
401	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS); /* Write lock is not needed atm since we are */
402	/* fiddling with enable bit only, but we */
403	/* care for those who come next :-). */
404
405	HRESULT rc = S_OK;
406	BaseMetricList filteredMetrics;
407	BaseMetricList::iterator it;
408	for (it = m.baseMetrics.begin(); it != m.baseMetrics.end(); ++it)
409	if (filter.match((it)->getObject(), (it)->getName()))
410	{
411	(*it)->enable();
412	filteredMetrics.push_back(*it);
413	}
414
415	com::SafeIfaceArray<IPerformanceMetric> retMetrics(filteredMetrics.size());
416	int i = 0;
417	for (it = filteredMetrics.begin();
418	it != filteredMetrics.end() && SUCCEEDED(rc); ++it)
419	rc = toIPerformanceMetric(*it, &retMetrics[i++]);
420	retMetrics.detachTo(ComSafeArrayOutArg(outMetrics));
421
422	LogFlowThisFuncLeave();
423	return rc;
424	}
425
426	STDMETHODIMP PerformanceCollector::DisableMetrics(ComSafeArrayIn(IN_BSTR, metricNames),
427	ComSafeArrayIn(IUnknown *, objects),
428	ComSafeArrayOut(IPerformanceMetric *, outMetrics))
429	{
430	AutoCaller autoCaller(this);
431	if (FAILED(autoCaller.rc())) return autoCaller.rc();
432
433	pm::Filter filter(ComSafeArrayInArg(metricNames),
434	ComSafeArrayInArg(objects));
435
436	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS); /* Write lock is not needed atm since we are */
437	/* fiddling with enable bit only, but we */
438	/* care for those who come next :-). */
439
440	HRESULT rc = S_OK;
441	BaseMetricList filteredMetrics;
442	BaseMetricList::iterator it;
443	for (it = m.baseMetrics.begin(); it != m.baseMetrics.end(); ++it)
444	if (filter.match((it)->getObject(), (it)->getName()))
445	{
446	(*it)->disable();
447	filteredMetrics.push_back(*it);
448	}
449
450	com::SafeIfaceArray<IPerformanceMetric> retMetrics(filteredMetrics.size());
451	int i = 0;
452	for (it = filteredMetrics.begin();
453	it != filteredMetrics.end() && SUCCEEDED(rc); ++it)
454	rc = toIPerformanceMetric(*it, &retMetrics[i++]);
455	retMetrics.detachTo(ComSafeArrayOutArg(outMetrics));
456
457	LogFlowThisFuncLeave();
458	return rc;
459	}
460
461	STDMETHODIMP PerformanceCollector::QueryMetricsData(ComSafeArrayIn (IN_BSTR, metricNames),
462	ComSafeArrayIn (IUnknown *, objects),
463	ComSafeArrayOut(BSTR, outMetricNames),
464	ComSafeArrayOut(IUnknown *, outObjects),
465	ComSafeArrayOut(BSTR, outUnits),
466	ComSafeArrayOut(ULONG, outScales),
467	ComSafeArrayOut(ULONG, outSequenceNumbers),
468	ComSafeArrayOut(ULONG, outDataIndices),
469	ComSafeArrayOut(ULONG, outDataLengths),
470	ComSafeArrayOut(LONG, outData))
471	{
472	AutoCaller autoCaller(this);
473	if (FAILED(autoCaller.rc())) return autoCaller.rc();
474
475	pm::Filter filter(ComSafeArrayInArg(metricNames),
476	ComSafeArrayInArg(objects));
477
478	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
479
480	/* Let's compute the size of the resulting flat array */
481	size_t flatSize = 0;
482	MetricList filteredMetrics;
483	MetricList::iterator it;
484	for (it = m.metrics.begin(); it != m.metrics.end(); ++it)
485	if (filter.match ((it)->getObject(), (it)->getName()))
486	{
487	filteredMetrics.push_back (*it);
488	flatSize += (*it)->getLength();
489	}
490
491	int i = 0;
492	size_t flatIndex = 0;
493	size_t numberOfMetrics = filteredMetrics.size();
494	com::SafeArray<BSTR> retNames(numberOfMetrics);
495	com::SafeIfaceArray<IUnknown> retObjects(numberOfMetrics);
496	com::SafeArray<BSTR> retUnits(numberOfMetrics);
497	com::SafeArray<ULONG> retScales(numberOfMetrics);
498	com::SafeArray<ULONG> retSequenceNumbers(numberOfMetrics);
499	com::SafeArray<ULONG> retIndices(numberOfMetrics);
500	com::SafeArray<ULONG> retLengths(numberOfMetrics);
501	com::SafeArray<LONG> retData(flatSize);
502
503	for (it = filteredMetrics.begin(); it != filteredMetrics.end(); ++it, ++i)
504	{
505	ULONG *values, length, sequenceNumber;
506	/* @todo We may want to revise the query method to get rid of excessive alloc/memcpy calls. */
507	(*it)->query(&values, &length, &sequenceNumber);
508	LogFlow (("PerformanceCollector::QueryMetricsData() querying metric %s "
509	"returned %d values.\n", (*it)->getName(), length));
510	memcpy(retData.raw() + flatIndex, values, length * sizeof(*values));
511	Bstr tmp((*it)->getName());
512	tmp.detachTo(&retNames[i]);
513	(*it)->getObject().queryInterfaceTo(&retObjects[i]);
514	tmp = (*it)->getUnit();
515	tmp.detachTo(&retUnits[i]);
516	retScales[i] = (*it)->getScale();
517	retSequenceNumbers[i] = sequenceNumber;
518	retLengths[i] = length;
519	retIndices[i] = (ULONG)flatIndex;
520	flatIndex += length;
521	}
522
523	retNames.detachTo(ComSafeArrayOutArg(outMetricNames));
524	retObjects.detachTo(ComSafeArrayOutArg(outObjects));
525	retUnits.detachTo(ComSafeArrayOutArg(outUnits));
526	retScales.detachTo(ComSafeArrayOutArg(outScales));
527	retSequenceNumbers.detachTo(ComSafeArrayOutArg(outSequenceNumbers));
528	retIndices.detachTo(ComSafeArrayOutArg(outDataIndices));
529	retLengths.detachTo(ComSafeArrayOutArg(outDataLengths));
530	retData.detachTo(ComSafeArrayOutArg(outData));
531	return S_OK;
532	}
533
534	// public methods for internal purposes
535	///////////////////////////////////////////////////////////////////////////////
536
537	void PerformanceCollector::registerBaseMetric(pm::BaseMetric *baseMetric)
538	{
539	//LogFlowThisFuncEnter();
540	AutoCaller autoCaller(this);
541	if (!SUCCEEDED(autoCaller.rc())) return;
542
543	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
544	LogAleksey(("{%p} " LOG_FN_FMT ": obj=%p name=%s\n", this, __PRETTY_FUNCTION__, (void *)baseMetric->getObject(), baseMetric->getName()));
545	m.baseMetrics.push_back (baseMetric);
546	//LogFlowThisFuncLeave();
547	}
548
549	void PerformanceCollector::registerMetric(pm::Metric *metric)
550	{
551	//LogFlowThisFuncEnter();
552	AutoCaller autoCaller(this);
553	if (!SUCCEEDED(autoCaller.rc())) return;
554
555	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
556	LogAleksey(("{%p} " LOG_FN_FMT ": obj=%p name=%s\n", this, __PRETTY_FUNCTION__, (void *)metric->getObject(), metric->getName()));
557	m.metrics.push_back (metric);
558	//LogFlowThisFuncLeave();
559	}
560
561	void PerformanceCollector::unregisterBaseMetricsFor(const ComPtr<IUnknown> &aObject)
562	{
563	//LogFlowThisFuncEnter();
564	AutoCaller autoCaller(this);
565	if (!SUCCEEDED(autoCaller.rc())) return;
566
567	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
568	int n = 0;
569	BaseMetricList::iterator it;
570	for (it = m.baseMetrics.begin(); it != m.baseMetrics.end(); ++it)
571	if ((*it)->associatedWith(aObject))
572	{
573	(*it)->unregister();
574	++n;
575	}
576	LogAleksey(("{%p} " LOG_FN_FMT ": obj=%p, marked %d metrics\n",
577	this, __PRETTY_FUNCTION__, (void *)aObject, n));
578	//LogFlowThisFuncLeave();
579	}
580
581	void PerformanceCollector::unregisterMetricsFor(const ComPtr<IUnknown> &aObject)
582	{
583	//LogFlowThisFuncEnter();
584	AutoCaller autoCaller(this);
585	if (!SUCCEEDED(autoCaller.rc())) return;
586
587	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
588	LogAleksey(("{%p} " LOG_FN_FMT ": obj=%p\n", this, __PRETTY_FUNCTION__, (void *)aObject));
589	MetricList::iterator it;
590	for (it = m.metrics.begin(); it != m.metrics.end();)
591	if ((*it)->associatedWith(aObject))
592	{
593	delete *it;
594	it = m.metrics.erase(it);
595	}
596	else
597	++it;
598	//LogFlowThisFuncLeave();
599	}
600
601	void PerformanceCollector::registerGuest(pm::CollectorGuest* pGuest)
602	{
603	AutoCaller autoCaller(this);
604	if (!SUCCEEDED(autoCaller.rc())) return;
605
606	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
607	m.gm->registerGuest(pGuest);
608	}
609
610	void PerformanceCollector::unregisterGuest(pm::CollectorGuest* pGuest)
611	{
612	AutoCaller autoCaller(this);
613	if (!SUCCEEDED(autoCaller.rc())) return;
614
615	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
616	m.gm->unregisterGuest(pGuest);
617	}
618
619	void PerformanceCollector::suspendSampling()
620	{
621	AutoCaller autoCaller(this);
622	if (!SUCCEEDED(autoCaller.rc())) return;
623
624	int rc = RTTimerLRStop(m.sampler);
625	AssertRC(rc);
626	}
627
628	void PerformanceCollector::resumeSampling()
629	{
630	AutoCaller autoCaller(this);
631	if (!SUCCEEDED(autoCaller.rc())) return;
632
633	int rc = RTTimerLRStart(m.sampler, 0);
634	AssertRC(rc);
635	}
636
637
638	// private methods
639	///////////////////////////////////////////////////////////////////////////////
640
641	/* static */
642	void PerformanceCollector::staticSamplerCallback(RTTIMERLR hTimerLR, void *pvUser,
643	uint64_t iTick)
644	{
645	AssertReturnVoid (pvUser != NULL);
646	PerformanceCollector collector = static_cast <PerformanceCollector > (pvUser);
647	Assert(collector->mMagic == MAGIC);
648	if (collector->mMagic == MAGIC)
649	collector->samplerCallback(iTick);
650
651	NOREF (hTimerLR);
652	}
653
654	/*
655	* Metrics collection is a three stage process:
656	* 1) Pre-collection (hinting)
657	* At this stage we compose the list of all metrics to be collected
658	* If any metrics cannot be collected separately or if it is more
659	* efficient to collect several metric at once, these metrics should
660	* use hints to mark that they will need to be collected.
661	* 2) Pre-collection (bulk)
662	* Using hints set at stage 1 platform-specific HAL
663	* instance collects all marked host-related metrics.
664	* Hinted guest-related metrics then get collected by CollectorGuestManager.
665	* 3) Collection
666	* Metrics that are collected individually get collected and stored. Values
667	* saved in HAL and CollectorGuestManager are extracted and stored to
668	* individual metrics.
669	*/
670	void PerformanceCollector::samplerCallback(uint64_t iTick)
671	{
672	Log4(("{%p} " LOG_FN_FMT ": ENTER\n", this, __PRETTY_FUNCTION__));
673	/* No locking until stage 3!*/
674
675	pm::CollectorHints hints;
676	uint64_t timestamp = RTTimeMilliTS();
677	BaseMetricList toBeCollected;
678	BaseMetricList::iterator it;
679	/* Compose the list of metrics being collected at this moment */
680	for (it = m.baseMetrics.begin(); it != m.baseMetrics.end(); it++)
681	if ((*it)->collectorBeat(timestamp))
682	{
683	(*it)->preCollect(hints, iTick);
684	toBeCollected.push_back(*it);
685	}
686
687	if (toBeCollected.size() == 0)
688	{
689	Log4(("{%p} " LOG_FN_FMT ": LEAVE (nothing to collect)\n", this, __PRETTY_FUNCTION__));
690	return;
691	}
692
693	/* Let know the platform specific code what is being collected */
694	m.hal->preCollect(hints, iTick);
695	/* Collect the data in bulk from all hinted guests */
696	m.gm->preCollect(hints, iTick);
697
698	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
699	/*
700	* Before we can collect data we need to go through both lists
701	* again to see if any base metrics are marked as unregistered.
702	* Those should be destroyed now.
703	*/
704	LogAleksey(("{%p} " LOG_FN_FMT ": before remove_if: toBeCollected.size()=%d\n", this, __PRETTY_FUNCTION__, toBeCollected.size()));
705	toBeCollected.remove_if(std::mem_fun(&pm::BaseMetric::isUnregistered));
706	LogAleksey(("{%p} " LOG_FN_FMT ": after remove_if: toBeCollected.size()=%d\n", this, __PRETTY_FUNCTION__, toBeCollected.size()));
707	LogAleksey(("{%p} " LOG_FN_FMT ": before remove_if: m.baseMetrics.size()=%d\n", this, __PRETTY_FUNCTION__, m.baseMetrics.size()));
708	for (it = m.baseMetrics.begin(); it != m.baseMetrics.end();)
709	if ((*it)->isUnregistered())
710	{
711	delete *it;
712	it = m.baseMetrics.erase(it);
713	}
714	else
715	++it;
716	LogAleksey(("{%p} " LOG_FN_FMT ": after remove_if: m.baseMetrics.size()=%d\n", this, __PRETTY_FUNCTION__, m.baseMetrics.size()));
717	/*
718	* Now when we have destroyed all base metrics that could
719	* try to pull data from unregistered CollectorGuest objects
720	* it is safe to destroy them as well.
721	*/
722	m.gm->destroyUnregistered();
723
724	/* Finally, collect the data */
725	std::for_each (toBeCollected.begin(), toBeCollected.end(),
726	std::mem_fun (&pm::BaseMetric::collect));
727	Log4(("{%p} " LOG_FN_FMT ": LEAVE\n", this, __PRETTY_FUNCTION__));
728	}
729
730	////////////////////////////////////////////////////////////////////////////////
731	// PerformanceMetric class
732	////////////////////////////////////////////////////////////////////////////////
733
734	// constructor / destructor
735	////////////////////////////////////////////////////////////////////////////////
736
737	PerformanceMetric::PerformanceMetric()
738	{
739	}
740
741	PerformanceMetric::~PerformanceMetric()
742	{
743	}
744
745	HRESULT PerformanceMetric::FinalConstruct()
746	{
747	LogFlowThisFunc(("\n"));
748
749	return BaseFinalConstruct();
750	}
751
752	void PerformanceMetric::FinalRelease()
753	{
754	LogFlowThisFunc(("\n"));
755
756	uninit ();
757
758	BaseFinalRelease();
759	}
760
761	// public initializer/uninitializer for internal purposes only
762	////////////////////////////////////////////////////////////////////////////////
763
764	HRESULT PerformanceMetric::init(pm::Metric *aMetric)
765	{
766	m.name = aMetric->getName();
767	m.object = aMetric->getObject();
768	m.description = aMetric->getDescription();
769	m.period = aMetric->getPeriod();
770	m.count = aMetric->getLength();
771	m.unit = aMetric->getUnit();
772	m.min = aMetric->getMinValue();
773	m.max = aMetric->getMaxValue();
774	return S_OK;
775	}
776
777	HRESULT PerformanceMetric::init(pm::BaseMetric *aMetric)
778	{
779	m.name = aMetric->getName();
780	m.object = aMetric->getObject();
781	m.description = "";
782	m.period = aMetric->getPeriod();
783	m.count = aMetric->getLength();
784	m.unit = aMetric->getUnit();
785	m.min = aMetric->getMinValue();
786	m.max = aMetric->getMaxValue();
787	return S_OK;
788	}
789
790	void PerformanceMetric::uninit()
791	{
792	}
793
794	STDMETHODIMP PerformanceMetric::COMGETTER(MetricName)(BSTR *aMetricName)
795	{
796	/// @todo (r=dmik) why do all these getters not do AutoCaller and
797	/// AutoReadLock? Is the underlying metric a constant object?
798
799	m.name.cloneTo(aMetricName);
800	return S_OK;
801	}
802
803	STDMETHODIMP PerformanceMetric::COMGETTER(Object)(IUnknown **anObject)
804	{
805	m.object.queryInterfaceTo(anObject);
806	return S_OK;
807	}
808
809	STDMETHODIMP PerformanceMetric::COMGETTER(Description)(BSTR *aDescription)
810	{
811	m.description.cloneTo(aDescription);
812	return S_OK;
813	}
814
815	STDMETHODIMP PerformanceMetric::COMGETTER(Period)(ULONG *aPeriod)
816	{
817	*aPeriod = m.period;
818	return S_OK;
819	}
820
821	STDMETHODIMP PerformanceMetric::COMGETTER(Count)(ULONG *aCount)
822	{
823	*aCount = m.count;
824	return S_OK;
825	}
826
827	STDMETHODIMP PerformanceMetric::COMGETTER(Unit)(BSTR *aUnit)
828	{
829	m.unit.cloneTo(aUnit);
830	return S_OK;
831	}
832
833	STDMETHODIMP PerformanceMetric::COMGETTER(MinimumValue)(LONG *aMinValue)
834	{
835	*aMinValue = m.min;
836	return S_OK;
837	}
838
839	STDMETHODIMP PerformanceMetric::COMGETTER(MaximumValue)(LONG *aMaxValue)
840	{
841	*aMaxValue = m.max;
842	return S_OK;
843	}
844	/* vi: set tabstop=4 shiftwidth=4 expandtab: */

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source: vbox/trunk/src/VBox/Main/src-server/PerformanceImpl.cpp@ 36839

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