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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.
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// On Mac, you can build this like so:
// xcrun clang++ -o ConditionSpeedTest Source/WTF/benchmarks/ConditionSpeedTest.cpp -O3 -W -ISource/WTF -ISource/WTF/icu -LWebKitBuild/Release -lWTF -framework Foundation -licucore -std=c++14 -fvisibility=hidden
#include "config.h"
#include "ToyLocks.h"
#include <condition_variable>
#include <mutex>
#include <thread>
#include <type_traits>
#include <unistd.h>
#include <wtf/Condition.h>
#include <wtf/DataLog.h>
#include <wtf/Deque.h>
#include <wtf/Lock.h>
#include <wtf/StdLibExtras.h>
#include <wtf/StringPrintStream.h>
#include <wtf/Threading.h>
#include <wtf/ThreadingPrimitives.h>
#include <wtf/Vector.h>
namespace {
const bool verbose = false;
unsigned numProducers;
unsigned numConsumers;
unsigned maxQueueSize;
unsigned numMessagesPerProducer;
NO_RETURN void usage()
{
printf("Usage: ConditionSpeedTest lock|mutex|all <num producers> <num consumers> <max queue size> <num messages per producer>\n");
exit(1);
}
template<typename Functor, typename ConditionType, typename LockType, typename std::enable_if<!std::is_same<ConditionType, std::condition_variable>::value>::type* = nullptr>
void wait(ConditionType& condition, LockType& lock, std::unique_lock<LockType>&, const Functor& predicate)
{
while (!predicate())
condition.wait(lock);
}
template<typename Functor, typename ConditionType, typename LockType, typename std::enable_if<std::is_same<ConditionType, std::condition_variable>::value>::type* = nullptr>
void wait(ConditionType& condition, LockType&, std::unique_lock<LockType>& locker, const Functor& predicate)
{
while (!predicate())
condition.wait(locker);
}
template<typename LockType, typename ConditionType, typename NotifyFunctor, typename NotifyAllFunctor>
void runTest(
unsigned numProducers,
unsigned numConsumers,
unsigned maxQueueSize,
unsigned numMessagesPerProducer,
const NotifyFunctor& notify,
const NotifyAllFunctor& notifyAll)
{
Deque<unsigned> queue;
bool shouldContinue = true;
LockType lock;
ConditionType emptyCondition;
ConditionType fullCondition;
Vector<Ref<Thread>> consumerThreads;
Vector<Ref<Thread>> producerThreads;
Vector<unsigned> received;
LockType receivedLock;
for (unsigned i = numConsumers; i--;) {
consumerThreads.append(Thread::create(
"Consumer thread",
[&] () {
for (;;) {
unsigned result;
unsigned mustNotify = false;
{
std::unique_lock<LockType> locker(lock);
wait(
emptyCondition, lock, locker,
[&] () {
if (verbose)
dataLog(toString(Thread::current(), ": Checking consumption predicate with shouldContinue = ", shouldContinue, ", queue.size() == ", queue.size(), "\n"));
return !shouldContinue || !queue.isEmpty();
});
if (!shouldContinue && queue.isEmpty())
return;
mustNotify = queue.size() == maxQueueSize;
result = queue.takeFirst();
}
notify(fullCondition, mustNotify);
{
auto locker = holdLock(receivedLock);
received.append(result);
}
}
}));
}
for (unsigned i = numProducers; i--;) {
producerThreads.append(Thread::create(
"Producer Thread",
[&] () {
for (unsigned i = 0; i < numMessagesPerProducer; ++i) {
bool mustNotify = false;
{
std::unique_lock<LockType> locker(lock);
wait(
fullCondition, lock, locker,
[&] () {
if (verbose)
dataLog(toString(Thread::current(), ": Checking production predicate with shouldContinue = ", shouldContinue, ", queue.size() == ", queue.size(), "\n"));
return queue.size() < maxQueueSize;
});
mustNotify = queue.isEmpty();
queue.append(i);
}
notify(emptyCondition, mustNotify);
}
}));
}
for (auto& thread : producerThreads)
thread->waitForCompletion();
{
auto locker = holdLock(lock);
shouldContinue = false;
}
notifyAll(emptyCondition);
for (auto& thread : consumerThreads)
thread->waitForCompletion();
RELEASE_ASSERT(numProducers * numMessagesPerProducer == received.size());
std::sort(received.begin(), received.end());
for (unsigned messageIndex = 0; messageIndex < numMessagesPerProducer; ++messageIndex) {
for (unsigned producerIndex = 0; producerIndex < numProducers; ++producerIndex)
RELEASE_ASSERT(messageIndex == received[messageIndex * numProducers + producerIndex]);
}
}
template<typename LockType, typename ConditionType, typename NotifyFunctor, typename NotifyAllFunctor>
void runBenchmark(
const char* name,
const NotifyFunctor& notify,
const NotifyAllFunctor& notifyAll)
{
MonotonicTime before = MonotonicTime::now();
runTest<LockType, ConditionType>(
numProducers,
numConsumers,
maxQueueSize,
numMessagesPerProducer,
notify,
notifyAll);
MonotonicTime after = MonotonicTime::now();
printf("%s: %.3lf ms.\n", name, (after - before).milliseconds());
}
} // anonymous namespace
int main(int argc, char** argv)
{
WTF::initialize();
if (argc != 6
|| sscanf(argv[2], "%u", &numProducers) != 1
|| sscanf(argv[3], "%u", &numConsumers) != 1
|| sscanf(argv[4], "%u", &maxQueueSize) != 1
|| sscanf(argv[5], "%u", &numMessagesPerProducer) != 1)
usage();
bool didRun = false;
if (!strcmp(argv[1], "lock") || !strcmp(argv[1], "all")) {
runBenchmark<Lock, Condition>(
"WTF Lock NotifyOne",
[&] (Condition& condition, bool) {
condition.notifyOne();
},
[&] (Condition& condition) {
condition.notifyAll();
});
runBenchmark<Lock, Condition>(
"WTF Lock NotifyAll",
[&] (Condition& condition, bool mustNotify) {
if (mustNotify)
condition.notifyAll();
},
[&] (Condition& condition) {
condition.notifyAll();
});
didRun = true;
}
if (!strcmp(argv[1], "mutex") || !strcmp(argv[1], "all")) {
runBenchmark<std::mutex, std::condition_variable>(
"std::mutex NotifyOne",
[&] (std::condition_variable& condition, bool) {
condition.notify_one();
},
[&] (std::condition_variable& condition) {
condition.notify_all();
});
runBenchmark<std::mutex, std::condition_variable>(
"std::mutex NotifyAll",
[&] (std::condition_variable& condition, bool mustNotify) {
if (mustNotify)
condition.notify_all();
},
[&] (std::condition_variable& condition) {
condition.notify_all();
});
didRun = true;
}
if (!didRun)
usage();
return 0;
}