tstRTSemRW.cpp@ 93115

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1	/* $Id: tstRTSemRW.cpp 93115 2022-01-01 11:31:46Z vboxsync $ */
2	/** @file
3	* IPRT Testcase - Reader/Writer Semaphore.
4	*/
5
6	/*
7	* Copyright (C) 2009-2022 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	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27
28	/*********************************************************************************************************************************
29	* Header Files *
30	*********************************************************************************************************************************/
31	#include <iprt/semaphore.h>
32
33	#include <iprt/asm.h>
34	#include <iprt/assert.h>
35	#include <iprt/err.h>
36	#include <iprt/initterm.h>
37	#include <iprt/lockvalidator.h>
38	#include <iprt/mp.h>
39	#include <iprt/rand.h>
40	#include <iprt/string.h>
41	#include <iprt/stream.h>
42	#include <iprt/test.h>
43	#include <iprt/time.h>
44	#include <iprt/thread.h>
45
46
47	/*********************************************************************************************************************************
48	* Global Variables *
49	*********************************************************************************************************************************/
50	static RTTEST g_hTest;
51	static RTSEMRW g_hSemRW = NIL_RTSEMRW;
52	static bool volatile g_fTerminate;
53	static bool g_fYield;
54	static bool g_fQuiet;
55	static unsigned g_uWritePercent;
56	static uint32_t volatile g_cConcurrentWriters;
57	static uint32_t volatile g_cConcurrentReaders;
58
59
60	static DECLCALLBACK(int) Test4Thread(RTTHREAD ThreadSelf, void *pvUser)
61	{
62	/* Use randomization to get a little more variation of the sync pattern.
63	We use a pseudo random generator here so that we don't end up testing
64	the speed of the /dev/urandom implementation, but rather the read-write
65	semaphores. */
66	int rc;
67	RTRAND hRand;
68	RTTEST_CHECK_RC_OK_RET(g_hTest, rc = RTRandAdvCreateParkMiller(&hRand), rc);
69	RTTEST_CHECK_RC_OK_RET(g_hTest, rc = RTRandAdvSeed(hRand, (uintptr_t)ThreadSelf), rc);
70	unsigned c100 = RTRandAdvU32Ex(hRand, 0, 99);
71
72	uint64_t pcItr = (uint64_t )pvUser;
73	bool fWrite;
74	for (;;)
75	{
76	unsigned readrec = RTRandAdvU32Ex(hRand, 0, 3);
77	unsigned writerec = RTRandAdvU32Ex(hRand, 0, 3);
78	/* Don't overdo recursion testing. */
79	if (readrec > 1)
80	readrec--;
81	if (writerec > 1)
82	writerec--;
83
84	fWrite = (c100 < g_uWritePercent);
85	if (fWrite)
86	{
87	for (unsigned i = 0; i <= writerec; i++)
88	{
89	rc = RTSemRWRequestWriteNoResume(g_hSemRW, RT_INDEFINITE_WAIT);
90	if (RT_FAILURE(rc))
91	{
92	RTTestFailed(g_hTest, "Write recursion %u on %s failed with rc=%Rrc", i, RTThreadSelfName(), rc);
93	break;
94	}
95	}
96	if (RT_FAILURE(rc))
97	break;
98	if (ASMAtomicIncU32(&g_cConcurrentWriters) != 1)
99	{
100	RTTestFailed(g_hTest, "g_cConcurrentWriters=%u on %s after write locking it",
101	g_cConcurrentWriters, RTThreadSelfName());
102	break;
103	}
104	if (g_cConcurrentReaders != 0)
105	{
106	RTTestFailed(g_hTest, "g_cConcurrentReaders=%u on %s after write locking it",
107	g_cConcurrentReaders, RTThreadSelfName());
108	break;
109	}
110	}
111	else
112	{
113	rc = RTSemRWRequestReadNoResume(g_hSemRW, RT_INDEFINITE_WAIT);
114	if (RT_FAILURE(rc))
115	{
116	RTTestFailed(g_hTest, "Read locking on %s failed with rc=%Rrc", RTThreadSelfName(), rc);
117	break;
118	}
119	ASMAtomicIncU32(&g_cConcurrentReaders);
120	if (g_cConcurrentWriters != 0)
121	{
122	RTTestFailed(g_hTest, "g_cConcurrentWriters=%u on %s after read locking it",
123	g_cConcurrentWriters, RTThreadSelfName());
124	break;
125	}
126	}
127	for (unsigned i = 0; i < readrec; i++)
128	{
129	rc = RTSemRWRequestReadNoResume(g_hSemRW, RT_INDEFINITE_WAIT);
130	if (RT_FAILURE(rc))
131	{
132	RTTestFailed(g_hTest, "Read recursion %u on %s failed with rc=%Rrc", i, RTThreadSelfName(), rc);
133	break;
134	}
135	}
136	if (RT_FAILURE(rc))
137	break;
138
139	/*
140	* Check for fairness: The values of the threads should not differ too much
141	*/
142	(*pcItr)++;
143
144	/*
145	* Check for correctness: Give other threads a chance. If the implementation is
146	* correct, no other thread will be able to enter this lock now.
147	*/
148	if (g_fYield)
149	RTThreadYield();
150
151	for (unsigned i = 0; i < readrec; i++)
152	{
153	rc = RTSemRWReleaseRead(g_hSemRW);
154	if (RT_FAILURE(rc))
155	{
156	RTTestFailed(g_hTest, "Read release %u on %s failed with rc=%Rrc", i, RTThreadSelfName(), rc);
157	break;
158	}
159	}
160	if (RT_FAILURE(rc))
161	break;
162
163	if (fWrite)
164	{
165	if (ASMAtomicDecU32(&g_cConcurrentWriters) != 0)
166	{
167	RTTestFailed(g_hTest, "g_cConcurrentWriters=%u on %s before write release",
168	g_cConcurrentWriters, RTThreadSelfName());
169	break;
170	}
171	if (g_cConcurrentReaders != 0)
172	{
173	RTTestFailed(g_hTest, "g_cConcurrentReaders=%u on %s before write release",
174	g_cConcurrentReaders, RTThreadSelfName());
175	break;
176	}
177	for (unsigned i = 0; i <= writerec; i++)
178	{
179	rc = RTSemRWReleaseWrite(g_hSemRW);
180	if (RT_FAILURE(rc))
181	{
182	RTTestFailed(g_hTest, "Write release %u on %s failed with rc=%Rrc", i, RTThreadSelfName(), rc);
183	break;
184	}
185	}
186	}
187	else
188	{
189	if (g_cConcurrentWriters != 0)
190	{
191	RTTestFailed(g_hTest, "g_cConcurrentWriters=%u on %s before read release",
192	g_cConcurrentWriters, RTThreadSelfName());
193	break;
194	}
195	ASMAtomicDecU32(&g_cConcurrentReaders);
196	rc = RTSemRWReleaseRead(g_hSemRW);
197	if (RT_FAILURE(rc))
198	{
199	RTTestFailed(g_hTest, "Read release on %s failed with rc=%Rrc", RTThreadSelfName(), rc);
200	break;
201	}
202	}
203
204	if (g_fTerminate)
205	break;
206
207	c100++;
208	c100 %= 100;
209	}
210	if (!g_fQuiet)
211	RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "Thread %s exited with %lld\n", RTThreadSelfName(), *pcItr);
212	RTRandAdvDestroy(hRand);
213	return VINF_SUCCESS;
214	}
215
216
217	static void Test4(unsigned cThreads, unsigned cSeconds, unsigned uWritePercent, bool fYield, bool fQuiet)
218	{
219	unsigned i;
220	uint64_t acIterations[32];
221	RTTHREAD aThreads[RT_ELEMENTS(acIterations)];
222	AssertRelease(cThreads <= RT_ELEMENTS(acIterations));
223
224	RTTestSubF(g_hTest, "Test4 - %u threads, %u sec, %u%% writes, %syielding",
225	cThreads, cSeconds, uWritePercent, fYield ? "" : "non-");
226
227	/*
228	* Init globals.
229	*/
230	g_fYield = fYield;
231	g_fQuiet = fQuiet;
232	g_fTerminate = false;
233	g_uWritePercent = uWritePercent;
234	g_cConcurrentWriters = 0;
235	g_cConcurrentReaders = 0;
236
237	RTTEST_CHECK_RC_RETV(g_hTest, RTSemRWCreate(&g_hSemRW), VINF_SUCCESS);
238
239	/*
240	* Create the threads and let them block on the semrw.
241	*/
242	RTTEST_CHECK_RC_RETV(g_hTest, RTSemRWRequestWrite(g_hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS);
243
244	for (i = 0; i < cThreads; i++)
245	{
246	acIterations[i] = 0;
247	RTTEST_CHECK_RC_RETV(g_hTest, RTThreadCreateF(&aThreads[i], Test4Thread, &acIterations[i], 0,
248	RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE,
249	"test-%u", i), VINF_SUCCESS);
250	}
251
252	/*
253	* Do the test run.
254	*/
255	uint32_t cErrorsBefore = RTTestErrorCount(g_hTest);
256	uint64_t u64StartTS = RTTimeNanoTS();
257	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseWrite(g_hSemRW), VINF_SUCCESS);
258	RTThreadSleep(cSeconds * 1000);
259	ASMAtomicWriteBool(&g_fTerminate, true);
260	uint64_t ElapsedNS = RTTimeNanoTS() - u64StartTS;
261
262	/*
263	* Clean up the threads and semaphore.
264	*/
265	for (i = 0; i < cThreads; i++)
266	RTTEST_CHECK_RC(g_hTest, RTThreadWait(aThreads[i], 5000, NULL), VINF_SUCCESS);
267
268	RTTEST_CHECK_MSG(g_hTest, g_cConcurrentWriters == 0, (g_hTest, "g_cConcurrentWriters=%u at end of test\n", g_cConcurrentWriters));
269	RTTEST_CHECK_MSG(g_hTest, g_cConcurrentReaders == 0, (g_hTest, "g_cConcurrentReaders=%u at end of test\n", g_cConcurrentReaders));
270
271	RTTEST_CHECK_RC(g_hTest, RTSemRWDestroy(g_hSemRW), VINF_SUCCESS);
272	g_hSemRW = NIL_RTSEMRW;
273
274	if (RTTestErrorCount(g_hTest) != cErrorsBefore)
275	RTThreadSleep(100);
276
277	/*
278	* Collect and display the results.
279	*/
280	uint64_t cItrTotal = acIterations[0];
281	for (i = 1; i < cThreads; i++)
282	cItrTotal += acIterations[i];
283
284	uint64_t cItrNormal = cItrTotal / cThreads;
285	uint64_t cItrMinOK = cItrNormal / 20; /* 5% */
286	uint64_t cItrMaxDeviation = 0;
287	for (i = 0; i < cThreads; i++)
288	{
289	uint64_t cItrDelta = RT_ABS((int64_t)(acIterations[i] - cItrNormal));
290	if (acIterations[i] < cItrMinOK)
291	RTTestFailed(g_hTest, "Thread %u did less than 5%% of the iterations - %llu (it) vs. %llu (5%%) - %llu%%\n",
292	i, acIterations[i], cItrMinOK, cItrDelta * 100 / cItrNormal);
293	else if (cItrDelta > cItrNormal / 2)
294	RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS,
295	"Warning! Thread %u deviates by more than 50%% - %llu (it) vs. %llu (avg) - %llu%%\n",
296	i, acIterations[i], cItrNormal, cItrDelta * 100 / cItrNormal);
297	if (cItrDelta > cItrMaxDeviation)
298	cItrMaxDeviation = cItrDelta;
299
300	}
301
302	//RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS,
303	// "Threads: %u Total: %llu Per Sec: %llu Avg: %llu ns Max dev: %llu%%\n",
304	// cThreads,
305	// cItrTotal,
306	// cItrTotal / cSeconds,
307	// ElapsedNS / cItrTotal,
308	// cItrMaxDeviation * 100 / cItrNormal
309	// );
310	//
311	RTTestValue(g_hTest, "Thruput", cItrTotal * UINT32_C(1000000000) / ElapsedNS, RTTESTUNIT_CALLS_PER_SEC);
312	RTTestValue(g_hTest, "Max diviation", cItrMaxDeviation * 100 / cItrNormal, RTTESTUNIT_PCT);
313	}
314
315
316	static DECLCALLBACK(int) Test2Thread(RTTHREAD hThreadSelf, void *pvUser)
317	{
318	RTSEMRW hSemRW = (RTSEMRW)pvUser;
319	RT_NOREF_PV(hThreadSelf);
320
321	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestRead(hSemRW, 0), VERR_TIMEOUT);
322	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestWrite(hSemRW, 0), VERR_TIMEOUT);
323
324	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestRead(hSemRW, 1), VERR_TIMEOUT);
325	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestWrite(hSemRW, 1), VERR_TIMEOUT);
326
327	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestRead(hSemRW, 50), VERR_TIMEOUT);
328	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestWrite(hSemRW, 50), VERR_TIMEOUT);
329
330	return VINF_SUCCESS;
331	}
332
333
334	static void Test3(void)
335	{
336	RTTestSub(g_hTest, "Negative");
337	bool fSavedAssertQuiet = RTAssertSetQuiet(true);
338	bool fSavedAssertMayPanic = RTAssertSetMayPanic(false);
339	bool fSavedLckValEnabled = RTLockValidatorSetEnabled(false);
340
341	RTSEMRW hSemRW;
342	RTTEST_CHECK_RC_RETV(g_hTest, RTSemRWCreate(&hSemRW), VINF_SUCCESS);
343
344	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseRead(hSemRW), VERR_NOT_OWNER);
345	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseWrite(hSemRW), VERR_NOT_OWNER);
346
347	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestWrite(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS);
348	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseRead(hSemRW), VERR_NOT_OWNER);
349
350	RTTEST_CHECK_RC(g_hTest, RTSemRWRequestRead(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS);
351	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseWrite(hSemRW), VERR_WRONG_ORDER); /* cannot release the final write before the reads. */
352	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS);
353	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS);
354
355	RTTEST_CHECK_RC(g_hTest, RTSemRWDestroy(hSemRW), VINF_SUCCESS);
356
357	RTLockValidatorSetEnabled(fSavedLckValEnabled);
358	RTAssertSetMayPanic(fSavedAssertMayPanic);
359	RTAssertSetQuiet(fSavedAssertQuiet);
360	}
361
362	static void Test2(void)
363	{
364	RTTestSub(g_hTest, "Timeout");
365
366	RTSEMRW hSemRW = NIL_RTSEMRW;
367	RTTEST_CHECK_RC_RETV(g_hTest, RTSemRWCreate(&hSemRW), VINF_SUCCESS);
368
369	/* Lock it for writing and let the thread do the remainder of the test. */
370	RTTEST_CHECK_RC_RETV(g_hTest, RTSemRWRequestWrite(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS);
371
372	RTTHREAD hThread;
373	RTTEST_CHECK_RC_RETV(g_hTest, RTThreadCreate(&hThread, Test2Thread, hSemRW, 0,
374	RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, "test2"),
375	VINF_SUCCESS);
376	RTTEST_CHECK_RC(g_hTest, RTThreadWait(hThread, 15000, NULL), VINF_SUCCESS);
377	RTTEST_CHECK_RC(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS);
378
379	RTTEST_CHECK_RC(g_hTest, RTSemRWDestroy(hSemRW), VINF_SUCCESS);
380	}
381
382
383	static bool Test1(void)
384	{
385	RTTestSub(g_hTest, "Basics");
386
387	RTSEMRW hSemRW = NIL_RTSEMRW;
388	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWCreate(&hSemRW), VINF_SUCCESS, false);
389	RTTEST_CHECK_RET(g_hTest, hSemRW != NIL_RTSEMRW, false);
390
391	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestRead(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS, false);
392	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS, false);
393
394	for (unsigned cMs = 0; cMs < 50; cMs++)
395	{
396	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestRead(hSemRW, cMs), VINF_SUCCESS, false);
397	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestRead(hSemRW, cMs), VINF_SUCCESS, false);
398	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS, false);
399	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS, false);
400	}
401
402	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestWrite(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS, false);
403	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS, false);
404
405	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestWrite(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS, false);
406	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestRead(hSemRW, RT_INDEFINITE_WAIT), VINF_SUCCESS, false);
407	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS, false);
408	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS, false);
409
410	for (unsigned cMs = 0; cMs < 50; cMs++)
411	{
412	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestWrite(hSemRW, cMs), VINF_SUCCESS, false);
413	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 1, false);
414	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 0, false);
415	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
416
417	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestWrite(hSemRW, cMs), VINF_SUCCESS, false);
418	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 2, false);
419	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 0, false);
420	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
421
422	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestRead(hSemRW, cMs), VINF_SUCCESS, false);
423	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 2, false);
424	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 1, false);
425	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
426
427	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWRequestWrite(hSemRW, cMs), VINF_SUCCESS, false);
428	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 3, false);
429	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 1, false);
430	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
431
432	/* midway */
433
434	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS, false);
435	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 2, false);
436	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 1, false);
437	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
438
439	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseRead(hSemRW), VINF_SUCCESS, false);
440	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 2, false);
441	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 0, false);
442	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
443
444	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS, false);
445	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 1, false);
446	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 0, false);
447	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == true, false);
448
449	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWReleaseWrite(hSemRW), VINF_SUCCESS, false);
450	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriteRecursion(hSemRW) == 0, false);
451	RTTEST_CHECK_RET(g_hTest, RTSemRWGetWriterReadRecursion(hSemRW) == 0, false);
452	RTTEST_CHECK_RET(g_hTest, RTSemRWIsWriteOwner(hSemRW) == false, false);
453	}
454
455	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWDestroy(hSemRW), VINF_SUCCESS, false);
456	RTTEST_CHECK_RC_RET(g_hTest, RTSemRWDestroy(NIL_RTSEMRW), VINF_SUCCESS, false);
457
458	return true;
459	}
460
461	int main(int argc, char **argv)
462	{
463	RT_NOREF_PV(argv);
464	int rc = RTTestInitAndCreate("tstRTSemRW", &g_hTest);
465	if (rc)
466	return 1;
467	RTTestBanner(g_hTest);
468
469	if (Test1())
470	{
471	RTCPUID cCores = RTMpGetOnlineCoreCount();
472	if (argc == 1)
473	{
474	Test2();
475	Test3();
476
477	/* threads, seconds, writePercent, yield, quiet */
478	Test4( 1, 1, 0, true, false);
479	Test4( 1, 1, 1, true, false);
480	Test4( 1, 1, 5, true, false);
481	Test4( 2, 1, 3, true, false);
482	Test4( 10, 1, 5, true, false);
483	Test4( 10, 10, 10, false, false);
484
485	if (cCores > 1)
486	{
487	RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "benchmarking (%u CPU cores)...\n", cCores);
488	for (unsigned cThreads = 1; cThreads < 32; cThreads++)
489	Test4(cThreads, 2, 1, false, true);
490	}
491	else
492	RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "skipping benchmarking (only %u CPU core available)\n", cCores);
493
494	/** @todo add a testcase where some stuff times out. */
495	}
496	else
497	{
498	if (cCores > 1)
499	{
500	/* threads, seconds, writePercent, yield, quiet */
501	RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "benchmarking...\n");
502	Test4( 1, 3, 1, false, true);
503	Test4( 1, 3, 1, false, true);
504	Test4( 1, 3, 1, false, true);
505	Test4( 2, 3, 1, false, true);
506	Test4( 2, 3, 1, false, true);
507	Test4( 2, 3, 1, false, true);
508	Test4( 3, 3, 1, false, true);
509	Test4( 3, 3, 1, false, true);
510	Test4( 3, 3, 1, false, true);
511	}
512	else
513	RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "skipping benchmarking (only %u CPU core available)\n", cCores);
514	}
515	}
516
517	return RTTestSummaryAndDestroy(g_hTest);
518	}
519

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source: vbox/trunk/src/VBox/Runtime/testcase/tstRTSemRW.cpp@ 93115

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