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|
/* $Id: tstRTCritSectRw.cpp $ */
/** @file
* IPRT Testcase - Reader/Writer Critical Sections.
*/
/*
* Copyright (C) 2009-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/critsect.h>
#include <iprt/asm.h>
#include <iprt/assert.h>
#include <iprt/err.h>
#include <iprt/initterm.h>
#include <iprt/lockvalidator.h>
#include <iprt/mp.h>
#include <iprt/rand.h>
#include <iprt/semaphore.h>
#include <iprt/string.h>
#include <iprt/stream.h>
#include <iprt/test.h>
#include <iprt/time.h>
#include <iprt/thread.h>
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
static RTTEST g_hTest;
static RTCRITSECTRW g_CritSectRw;
static bool volatile g_fTerminate;
static bool g_fYield;
static bool g_fQuiet;
static unsigned g_uWritePercent;
static uint32_t volatile g_cConcurrentWriters;
static uint32_t volatile g_cConcurrentReaders;
static DECLCALLBACK(int) Test4Thread(RTTHREAD ThreadSelf, void *pvUser)
{
/* Use randomization to get a little more variation of the sync pattern.
We use a pseudo random generator here so that we don't end up testing
the speed of the /dev/urandom implementation, but rather the read-write
semaphores. */
int rc;
RTRAND hRand;
RTTEST_CHECK_RC_OK_RET(g_hTest, rc = RTRandAdvCreateParkMiller(&hRand), rc);
RTTEST_CHECK_RC_OK_RET(g_hTest, rc = RTRandAdvSeed(hRand, (uintptr_t)ThreadSelf), rc);
unsigned c100 = RTRandAdvU32Ex(hRand, 0, 99);
uint64_t *pcItr = (uint64_t *)pvUser;
bool fWrite;
for (;;)
{
unsigned readrec = RTRandAdvU32Ex(hRand, 0, 3);
unsigned writerec = RTRandAdvU32Ex(hRand, 0, 3);
/* Don't overdo recursion testing. */
if (readrec > 1)
readrec--;
if (writerec > 1)
writerec--;
fWrite = (c100 < g_uWritePercent);
if (fWrite)
{
for (unsigned i = 0; i <= writerec; i++)
{
rc = RTCritSectRwEnterExcl(&g_CritSectRw);
if (RT_FAILURE(rc))
{
RTTestFailed(g_hTest, "Write recursion %u on %s failed with rc=%Rrc", i, RTThreadSelfName(), rc);
break;
}
}
if (RT_FAILURE(rc))
break;
if (ASMAtomicIncU32(&g_cConcurrentWriters) != 1)
{
RTTestFailed(g_hTest, "g_cConcurrentWriters=%u on %s after write locking it",
g_cConcurrentWriters, RTThreadSelfName());
break;
}
if (g_cConcurrentReaders != 0)
{
RTTestFailed(g_hTest, "g_cConcurrentReaders=%u on %s after write locking it",
g_cConcurrentReaders, RTThreadSelfName());
break;
}
}
else
{
rc = RTCritSectRwEnterShared(&g_CritSectRw);
if (RT_FAILURE(rc))
{
RTTestFailed(g_hTest, "Read locking on %s failed with rc=%Rrc", RTThreadSelfName(), rc);
break;
}
ASMAtomicIncU32(&g_cConcurrentReaders);
if (g_cConcurrentWriters != 0)
{
RTTestFailed(g_hTest, "g_cConcurrentWriters=%u on %s after read locking it",
g_cConcurrentWriters, RTThreadSelfName());
break;
}
}
for (unsigned i = 0; i < readrec; i++)
{
rc = RTCritSectRwEnterShared(&g_CritSectRw);
if (RT_FAILURE(rc))
{
RTTestFailed(g_hTest, "Read recursion %u on %s failed with rc=%Rrc", i, RTThreadSelfName(), rc);
break;
}
}
if (RT_FAILURE(rc))
break;
/*
* Check for fairness: The values of the threads should not differ too much
*/
(*pcItr)++;
/*
* Check for correctness: Give other threads a chance. If the implementation is
* correct, no other thread will be able to enter this lock now.
*/
if (g_fYield)
RTThreadYield();
for (unsigned i = 0; i < readrec; i++)
{
rc = RTCritSectRwLeaveShared(&g_CritSectRw);
if (RT_FAILURE(rc))
{
RTTestFailed(g_hTest, "Read release %u on %s failed with rc=%Rrc", i, RTThreadSelfName(), rc);
break;
}
}
if (RT_FAILURE(rc))
break;
if (fWrite)
{
if (ASMAtomicDecU32(&g_cConcurrentWriters) != 0)
{
RTTestFailed(g_hTest, "g_cConcurrentWriters=%u on %s before write release",
g_cConcurrentWriters, RTThreadSelfName());
break;
}
if (g_cConcurrentReaders != 0)
{
RTTestFailed(g_hTest, "g_cConcurrentReaders=%u on %s before write release",
g_cConcurrentReaders, RTThreadSelfName());
break;
}
for (unsigned i = 0; i <= writerec; i++)
{
rc = RTCritSectRwLeaveExcl(&g_CritSectRw);
if (RT_FAILURE(rc))
{
RTTestFailed(g_hTest, "Write release %u on %s failed with rc=%Rrc", i, RTThreadSelfName(), rc);
break;
}
}
}
else
{
if (g_cConcurrentWriters != 0)
{
RTTestFailed(g_hTest, "g_cConcurrentWriters=%u on %s before read release",
g_cConcurrentWriters, RTThreadSelfName());
break;
}
ASMAtomicDecU32(&g_cConcurrentReaders);
rc = RTCritSectRwLeaveShared(&g_CritSectRw);
if (RT_FAILURE(rc))
{
RTTestFailed(g_hTest, "Read release on %s failed with rc=%Rrc", RTThreadSelfName(), rc);
break;
}
}
if (g_fTerminate)
break;
c100++;
c100 %= 100;
}
if (!g_fQuiet)
RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "Thread %s exited with %lld\n", RTThreadSelfName(), *pcItr);
RTRandAdvDestroy(hRand);
return VINF_SUCCESS;
}
static void Test4(unsigned cThreads, unsigned cSeconds, unsigned uWritePercent, bool fYield, bool fQuiet)
{
unsigned i;
uint64_t acIterations[32];
RTTHREAD aThreads[RT_ELEMENTS(acIterations)];
AssertRelease(cThreads <= RT_ELEMENTS(acIterations));
RTTestSubF(g_hTest, "Test4 - %u threads, %u sec, %u%% writes, %syielding",
cThreads, cSeconds, uWritePercent, fYield ? "" : "non-");
/*
* Init globals.
*/
g_fYield = fYield;
g_fQuiet = fQuiet;
g_fTerminate = false;
g_uWritePercent = uWritePercent;
g_cConcurrentWriters = 0;
g_cConcurrentReaders = 0;
RTTEST_CHECK_RC_RETV(g_hTest, RTCritSectRwInit(&g_CritSectRw), VINF_SUCCESS);
/*
* Create the threads and let them block on the semrw.
*/
RTTEST_CHECK_RC_RETV(g_hTest, RTCritSectRwEnterExcl(&g_CritSectRw), VINF_SUCCESS);
for (i = 0; i < cThreads; i++)
{
acIterations[i] = 0;
RTTEST_CHECK_RC_RETV(g_hTest, RTThreadCreateF(&aThreads[i], Test4Thread, &acIterations[i], 0,
RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE,
"test-%u", i), VINF_SUCCESS);
}
/*
* Do the test run.
*/
uint32_t cErrorsBefore = RTTestErrorCount(g_hTest);
uint64_t u64StartTS = RTTimeNanoTS();
RTTEST_CHECK_RC(g_hTest, RTCritSectRwLeaveExcl(&g_CritSectRw), VINF_SUCCESS);
RTThreadSleep(cSeconds * 1000);
ASMAtomicWriteBool(&g_fTerminate, true);
uint64_t ElapsedNS = RTTimeNanoTS() - u64StartTS;
/*
* Clean up the threads and semaphore.
*/
for (i = 0; i < cThreads; i++)
RTTEST_CHECK_RC(g_hTest, RTThreadWait(aThreads[i], 5000, NULL), VINF_SUCCESS);
RTTEST_CHECK_MSG(g_hTest, g_cConcurrentWriters == 0, (g_hTest, "g_cConcurrentWriters=%u at end of test\n", g_cConcurrentWriters));
RTTEST_CHECK_MSG(g_hTest, g_cConcurrentReaders == 0, (g_hTest, "g_cConcurrentReaders=%u at end of test\n", g_cConcurrentReaders));
RTTEST_CHECK_RC(g_hTest, RTCritSectRwDelete(&g_CritSectRw), VINF_SUCCESS);
if (RTTestErrorCount(g_hTest) != cErrorsBefore)
RTThreadSleep(100);
/*
* Collect and display the results.
*/
uint64_t cItrTotal = acIterations[0];
for (i = 1; i < cThreads; i++)
cItrTotal += acIterations[i];
uint64_t cItrNormal = cItrTotal / cThreads;
uint64_t cItrMinOK = cItrNormal / 20; /* 5% */
uint64_t cItrMaxDeviation = 0;
for (i = 0; i < cThreads; i++)
{
uint64_t cItrDelta = RT_ABS((int64_t)(acIterations[i] - cItrNormal));
if (acIterations[i] < cItrMinOK)
RTTestFailed(g_hTest, "Thread %u did less than 5%% of the iterations - %llu (it) vs. %llu (5%%) - %llu%%\n",
i, acIterations[i], cItrMinOK, cItrDelta * 100 / cItrNormal);
else if (cItrDelta > cItrNormal / 2)
RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS,
"Warning! Thread %u deviates by more than 50%% - %llu (it) vs. %llu (avg) - %llu%%\n",
i, acIterations[i], cItrNormal, cItrDelta * 100 / cItrNormal);
if (cItrDelta > cItrMaxDeviation)
cItrMaxDeviation = cItrDelta;
}
//RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS,
// "Threads: %u Total: %llu Per Sec: %llu Avg: %llu ns Max dev: %llu%%\n",
// cThreads,
// cItrTotal,
// cItrTotal / cSeconds,
// ElapsedNS / cItrTotal,
// cItrMaxDeviation * 100 / cItrNormal
// );
//
RTTestValue(g_hTest, "Thruput", cItrTotal * UINT32_C(1000000000) / ElapsedNS, RTTESTUNIT_CALLS_PER_SEC);
RTTestValue(g_hTest, "Max diviation", cItrMaxDeviation * 100 / cItrNormal, RTTESTUNIT_PCT);
}
static void TestNegative(void)
{
RTTestSub(g_hTest, "Negative");
bool fSavedAssertQuiet = RTAssertSetQuiet(true);
bool fSavedAssertMayPanic = RTAssertSetMayPanic(false);
bool fSavedLckValEnabled = RTLockValidatorSetEnabled(false);
RTCRITSECTRW CritSectRw;
RTTEST_CHECK_RC_RETV(g_hTest, RTCritSectRwInit(&CritSectRw), VINF_SUCCESS);
RTTEST_CHECK_RC(g_hTest, RTCritSectRwLeaveShared(&CritSectRw), VERR_NOT_OWNER);
RTTEST_CHECK_RC(g_hTest, RTCritSectRwLeaveExcl(&CritSectRw), VERR_NOT_OWNER);
RTTEST_CHECK_RC(g_hTest, RTCritSectRwEnterExcl(&CritSectRw), VINF_SUCCESS);
RTTEST_CHECK_RC(g_hTest, RTCritSectRwLeaveShared(&CritSectRw), VERR_NOT_OWNER);
RTTEST_CHECK_RC(g_hTest, RTCritSectRwEnterShared(&CritSectRw), VINF_SUCCESS);
RTTEST_CHECK_RC(g_hTest, RTCritSectRwLeaveExcl(&CritSectRw), VERR_WRONG_ORDER); /* cannot release the final write before the reads. */
RTTEST_CHECK_RC(g_hTest, RTCritSectRwLeaveShared(&CritSectRw), VINF_SUCCESS);
RTTEST_CHECK_RC(g_hTest, RTCritSectRwLeaveExcl(&CritSectRw), VINF_SUCCESS);
RTTEST_CHECK_RC(g_hTest, RTCritSectRwDelete(&CritSectRw), VINF_SUCCESS);
RTLockValidatorSetEnabled(fSavedLckValEnabled);
RTAssertSetMayPanic(fSavedAssertMayPanic);
RTAssertSetQuiet(fSavedAssertQuiet);
}
static bool Test1(void)
{
RTTestSub(g_hTest, "Basics");
RTCRITSECTRW CritSectRw;
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwInit(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwIsInitialized(&CritSectRw), false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwEnterShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwEnterShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwEnterShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwEnterExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwEnterExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwEnterExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwEnterExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwEnterShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveExcl(&CritSectRw), VINF_SUCCESS, false);
for (int iRun = 0; iRun < 3; iRun++)
{
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwEnterExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwGetWriteRecursion(&CritSectRw) == 1, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwGetWriterReadRecursion(&CritSectRw) == 0, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwIsWriteOwner(&CritSectRw) == true, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwEnterExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwGetWriteRecursion(&CritSectRw) == 2, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwGetWriterReadRecursion(&CritSectRw) == 0, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwIsWriteOwner(&CritSectRw) == true, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwEnterShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwGetWriteRecursion(&CritSectRw) == 2, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwGetWriterReadRecursion(&CritSectRw) == 1, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwIsWriteOwner(&CritSectRw) == true, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwEnterExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwGetWriteRecursion(&CritSectRw) == 3, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwGetWriterReadRecursion(&CritSectRw) == 1, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwIsWriteOwner(&CritSectRw) == true, false);
/* midway */
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwGetWriteRecursion(&CritSectRw) == 2, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwGetWriterReadRecursion(&CritSectRw) == 1, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwIsWriteOwner(&CritSectRw) == true, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwGetWriteRecursion(&CritSectRw) == 2, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwGetWriterReadRecursion(&CritSectRw) == 0, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwIsWriteOwner(&CritSectRw) == true, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwGetWriteRecursion(&CritSectRw) == 1, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwGetWriterReadRecursion(&CritSectRw) == 0, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwIsWriteOwner(&CritSectRw) == true, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwGetWriteRecursion(&CritSectRw) == 0, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwGetWriterReadRecursion(&CritSectRw) == 0, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwIsWriteOwner(&CritSectRw) == false, false);
}
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwTryEnterShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwTryEnterShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwTryEnterShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwTryEnterExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwTryEnterExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwTryEnterExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwTryEnterExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwTryEnterShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveShared(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwLeaveExcl(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RET(g_hTest, RTCritSectRwIsInitialized(&CritSectRw), false);
RTTEST_CHECK_RC_RET(g_hTest, RTCritSectRwDelete(&CritSectRw), VINF_SUCCESS, false);
RTTEST_CHECK_RET(g_hTest, !RTCritSectRwIsInitialized(&CritSectRw), false);
return true;
}
int main(int argc, char **argv)
{
RT_NOREF_PV(argv);
int rc = RTTestInitAndCreate("tstRTCritSectRw", &g_hTest);
if (rc)
return 1;
RTTestBanner(g_hTest);
if (Test1())
{
RTCPUID cCores = RTMpGetOnlineCoreCount();
if (argc == 1)
{
TestNegative();
/* threads, seconds, writePercent, yield, quiet */
Test4( 1, 1, 0, true, false);
Test4( 1, 1, 1, true, false);
Test4( 1, 1, 5, true, false);
Test4( 2, 1, 3, true, false);
Test4( 10, 1, 5, true, false);
Test4( 10, 10, 10, false, false);
if (cCores > 1)
{
RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "benchmarking (%u CPU cores)...\n", cCores);
for (unsigned cThreads = 1; cThreads < 32; cThreads++)
Test4(cThreads, 2, 1, false, true);
}
else
RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "skipping benchmarking (only %u core available)\n", cCores);
/** @todo add a testcase where some stuff times out. */
}
else
{
if (cCores > 1)
{
/* threads, seconds, writePercent, yield, quiet */
RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "benchmarking (%u CPU cores)...\n", cCores);
Test4( 1, 3, 1, false, true);
Test4( 1, 3, 1, false, true);
Test4( 1, 3, 1, false, true);
Test4( 2, 3, 1, false, true);
Test4( 2, 3, 1, false, true);
Test4( 2, 3, 1, false, true);
Test4( 3, 3, 1, false, true);
Test4( 3, 3, 1, false, true);
Test4( 3, 3, 1, false, true);
}
else
RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "skipping benchmarking (only %u core available)\n", cCores);
}
}
return RTTestSummaryAndDestroy(g_hTest);
}
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