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/*
* Copyright (C) 2015-2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// On Mac, you can build this like so:
// xcrun clang++ -o LockSpeedTest Source/WTF/benchmarks/LockSpeedTest.cpp -O3 -W -ISource/WTF -ISource/WTF/icu -ISource/WTF/benchmarks -LWebKitBuild/Release -lWTF -framework Foundation -licucore -std=c++14 -fvisibility=hidden
#include "config.h"
#include "ToyLocks.h"
#include <thread>
#include <unistd.h>
#include <wtf/DataLog.h>
#include <wtf/HashMap.h>
#include <wtf/Lock.h>
#include <wtf/ParkingLot.h>
#include <wtf/StdLibExtras.h>
#include <wtf/Threading.h>
#include <wtf/ThreadingPrimitives.h>
#include <wtf/Vector.h>
#include <wtf/WordLock.h>
#include <wtf/text/CString.h>
namespace {
unsigned numThreadGroups;
unsigned numThreadsPerGroup;
unsigned workPerCriticalSection;
unsigned workBetweenCriticalSections;
double secondsPerTest;
NO_RETURN void usage()
{
printf("Usage: LockSpeedTest yieldspinlock|pausespinlock|wordlock|lock|barginglock|bargingwordlock|thunderlock|thunderwordlock|cascadelock|cascadewordlock|handofflock|unfairlock|mutex|all <num thread groups> <num threads per group> <work per critical section> <work between critical sections> <spin limit> <seconds per test>\n");
exit(1);
}
template<typename Type>
struct WithPadding {
Type value;
char buf[300]; // It's best if this isn't perfect to avoid false sharing.
};
HashMap<CString, Vector<double>> results;
void reportResult(const char* name, double value)
{
dataLogF("%s: %.3lf KHz\n", name, value);
results.add(name, Vector<double>()).iterator->value.append(value);
}
struct Benchmark {
template<typename LockType>
static void run(const char* name)
{
std::unique_ptr<WithPadding<LockType>[]> locks = makeUniqueWithoutFastMallocCheck<WithPadding<LockType>[]>(numThreadGroups);
std::unique_ptr<WithPadding<double>[]> words = makeUniqueWithoutFastMallocCheck<WithPadding<double>[]>(numThreadGroups);
std::unique_ptr<RefPtr<Thread>[]> threads = makeUniqueWithoutFastMallocCheck<RefPtr<Thread>[]>(numThreadGroups * numThreadsPerGroup);
volatile bool keepGoing = true;
MonotonicTime before = MonotonicTime::now();
Lock numIterationsLock;
uint64_t numIterations = 0;
for (unsigned threadGroupIndex = numThreadGroups; threadGroupIndex--;) {
words[threadGroupIndex].value = 0;
for (unsigned threadIndex = numThreadsPerGroup; threadIndex--;) {
threads[threadGroupIndex * numThreadsPerGroup + threadIndex] = Thread::create(
"Benchmark thread",
[threadGroupIndex, &locks, &words, &keepGoing, &numIterationsLock, &numIterations] () {
double localWord = 0;
double value = 1;
unsigned myNumIterations = 0;
while (keepGoing) {
locks[threadGroupIndex].value.lock();
for (unsigned j = workPerCriticalSection; j--;) {
words[threadGroupIndex].value += value;
value = words[threadGroupIndex].value;
}
locks[threadGroupIndex].value.unlock();
for (unsigned j = workBetweenCriticalSections; j--;) {
localWord += value;
value = localWord;
}
myNumIterations++;
}
LockHolder locker(numIterationsLock);
numIterations += myNumIterations;
});
}
}
sleep(Seconds { secondsPerTest });
keepGoing = false;
for (unsigned threadIndex = numThreadGroups * numThreadsPerGroup; threadIndex--;)
threads[threadIndex]->waitForCompletion();
MonotonicTime after = MonotonicTime::now();
reportResult(name, numIterations / (after - before).seconds() / 1000);
}
};
unsigned rangeMin;
unsigned rangeMax;
unsigned rangeStep;
unsigned* rangeVariable;
bool parseValue(const char* string, unsigned* variable)
{
unsigned myRangeMin;
unsigned myRangeMax;
unsigned myRangeStep;
if (sscanf(string, "%u-%u:%u", &myRangeMin, &myRangeMax, &myRangeStep) == 3) {
if (rangeVariable) {
fprintf(stderr, "Can only have one variable with a range.\n");
return false;
}
rangeMin = myRangeMin;
rangeMax = myRangeMax;
rangeStep = myRangeStep;
rangeVariable = variable;
return true;
}
if (sscanf(string, "%u", variable) == 1)
return true;
return false;
}
} // anonymous namespace
int main(int argc, char** argv)
{
WTF::initializeThreading();
if (argc != 8
|| !parseValue(argv[2], &numThreadGroups)
|| !parseValue(argv[3], &numThreadsPerGroup)
|| !parseValue(argv[4], &workPerCriticalSection)
|| !parseValue(argv[5], &workBetweenCriticalSections)
|| !parseValue(argv[6], &toyLockSpinLimit)
|| sscanf(argv[7], "%lf", &secondsPerTest) != 1)
usage();
if (rangeVariable) {
dataLog("Running with rangeMin = ", rangeMin, ", rangeMax = ", rangeMax, ", rangeStep = ", rangeStep, "\n");
for (unsigned value = rangeMin; value <= rangeMax; value += rangeStep) {
dataLog("Running with value = ", value, "\n");
*rangeVariable = value;
runEverything<Benchmark>(argv[1]);
}
} else
runEverything<Benchmark>(argv[1]);
for (auto& entry : results) {
printf("%s = {", entry.key.data());
bool first = true;
for (double value : entry.value) {
if (first)
first = false;
else
printf(", ");
printf("%.3lf", value);
}
printf("};\n");
}
return 0;
}
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