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authorOlivier Goffart <ogoffart@woboq.com>2016-08-05 11:36:02 +0200
committerOlivier Goffart (Woboq GmbH) <ogoffart@woboq.com>2016-08-10 09:05:14 +0000
commit5699530758f05e6f2cd9debc29ff30d318f4db34 (patch)
tree43beb81f51e3a825ee8419072e6a1c37e5c9dfa5 /tests/benchmarks/corelib/thread
parent9981f521d96b0369b72ff56bae96175db4148ded (diff)
Add a benchmark for QReadWriteLock
Results on current dev branch [955b2bdfc0cb1d707f8914be230e5e00c548b6ab]: thread count: 4 ********* Start testing of tst_QReadWriteLock ********* Config: Using QtTest library 5.8.0, Qt 5.8.0 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 6.1.1 20160707) PASS : tst_QReadWriteLock::initTestCase() PASS : tst_QReadWriteLock::uncontended(nothing) RESULT : tst_QReadWriteLock::uncontended():"nothing": 1,113,292.1 CPU ticks per iteration (total: 11,132,922, iterations: 10) PASS : tst_QReadWriteLock::uncontended(QMutex) RESULT : tst_QReadWriteLock::uncontended():"QMutex": 35,490,310.7 CPU ticks per iteration (total: 354,903,108, iterations: 10) PASS : tst_QReadWriteLock::uncontended(QReadWriteLock, read) RESULT : tst_QReadWriteLock::uncontended():"QReadWriteLock, read": 40,513,695.0 CPU ticks per iteration (total: 405,136,950, iterations: 10) PASS : tst_QReadWriteLock::uncontended(QReadWriteLock, write) RESULT : tst_QReadWriteLock::uncontended():"QReadWriteLock, write": 43,179,327.2 CPU ticks per iteration (total: 431,793,272, iterations: 10) PASS : tst_QReadWriteLock::uncontended(std::mutex) RESULT : tst_QReadWriteLock::uncontended():"std::mutex": 37,733,243.0 CPU ticks per iteration (total: 377,332,430, iterations: 10) PASS : tst_QReadWriteLock::uncontended(std::shared_timed_mutex, read) RESULT : tst_QReadWriteLock::uncontended():"std::shared_timed_mutex, read": 71,517,438.7 CPU ticks per iteration (total: 715,174,388, iterations: 10) PASS : tst_QReadWriteLock::uncontended(std::shared_timed_mutex, write) RESULT : tst_QReadWriteLock::uncontended():"std::shared_timed_mutex, write": 69,967,867.5 CPU ticks per iteration (total: 699,678,676, iterations: 10) PASS : tst_QReadWriteLock::readOnly(nothing) RESULT : tst_QReadWriteLock::readOnly():"nothing": 479,393,335.3 CPU ticks per iteration (total: 4,793,933,354, iterations: 10) PASS : tst_QReadWriteLock::readOnly(QMutex) RESULT : tst_QReadWriteLock::readOnly():"QMutex": 823,493,383.2 CPU ticks per iteration (total: 8,234,933,832, iterations: 10) PASS : tst_QReadWriteLock::readOnly(QReadWriteLock) RESULT : tst_QReadWriteLock::readOnly():"QReadWriteLock": 559,816,053.6 CPU ticks per iteration (total: 5,598,160,536, iterations: 10) PASS : tst_QReadWriteLock::readOnly(std::mutex) RESULT : tst_QReadWriteLock::readOnly():"std::mutex": 961,903,416.3 CPU ticks per iteration (total: 9,619,034,164, iterations: 10) PASS : tst_QReadWriteLock::readOnly(std::shared_timed_mutex) RESULT : tst_QReadWriteLock::readOnly():"std::shared_timed_mutex": 1,786,254,363.5 CPU ticks per iteration (total: 17,862,543,636, iterations: 10) PASS : tst_QReadWriteLock::cleanupTestCase() Totals: 14 passed, 0 failed, 0 skipped, 0 blacklisted, 44507ms ********* Finished testing of tst_QReadWriteLock ********* Change-Id: I42189f7a356dcb36378e9d54111b7fbe89e62402 Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'tests/benchmarks/corelib/thread')
-rw-r--r--tests/benchmarks/corelib/thread/qreadwritelock/qreadwritelock.pro6
-rw-r--r--tests/benchmarks/corelib/thread/qreadwritelock/tst_qreadwritelock.cpp183
-rw-r--r--tests/benchmarks/corelib/thread/thread.pro1
3 files changed, 190 insertions, 0 deletions
diff --git a/tests/benchmarks/corelib/thread/qreadwritelock/qreadwritelock.pro b/tests/benchmarks/corelib/thread/qreadwritelock/qreadwritelock.pro
new file mode 100644
index 0000000000..86102adecd
--- /dev/null
+++ b/tests/benchmarks/corelib/thread/qreadwritelock/qreadwritelock.pro
@@ -0,0 +1,6 @@
+TEMPLATE = app
+TARGET = tst_bench_qreadwritelock
+QT = core testlib
+SOURCES += tst_qreadwritelock.cpp
+CONFIG += c++14 # for std::shared_timed_mutex
+
diff --git a/tests/benchmarks/corelib/thread/qreadwritelock/tst_qreadwritelock.cpp b/tests/benchmarks/corelib/thread/qreadwritelock/tst_qreadwritelock.cpp
new file mode 100644
index 0000000000..bdec6c3a0a
--- /dev/null
+++ b/tests/benchmarks/corelib/thread/qreadwritelock/tst_qreadwritelock.cpp
@@ -0,0 +1,183 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Olivier Goffart <ogoffart@woboq.com>
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtCore/QtCore>
+#include <QtTest/QtTest>
+#include <mutex>
+#if QT_HAS_INCLUDE(<shared_mutex>)
+#if __cplusplus > 201103L
+#include <shared_mutex>
+#endif
+#endif
+
+// Wrapers that take pointers instead of reference to have the same interface as Qt
+template <typename T>
+struct LockerWrapper : T
+{
+ LockerWrapper(typename T::mutex_type *mtx)
+ : T(*mtx)
+ {
+ }
+};
+
+int threadCount;
+
+class tst_QReadWriteLock : public QObject
+{
+ Q_OBJECT
+public:
+ tst_QReadWriteLock()
+ {
+ // at least 2 threads, even on single cpu/core machines
+ threadCount = qMax(2, QThread::idealThreadCount());
+ qDebug("thread count: %d", threadCount);
+ }
+
+private slots:
+ void uncontended_data();
+ void uncontended();
+ void readOnly_data();
+ void readOnly();
+ // void readWrite();
+};
+
+struct FunctionPtrHolder
+{
+ FunctionPtrHolder(QFunctionPointer value = nullptr)
+ : value(value)
+ {
+ }
+ QFunctionPointer value;
+};
+Q_DECLARE_METATYPE(FunctionPtrHolder)
+
+struct FakeLock
+{
+ FakeLock(volatile int *i) { *i = 0; }
+};
+
+enum { Iterations = 1000000 };
+
+template <typename Mutex, typename Locker>
+void testUncontended()
+{
+ Mutex lock;
+ QBENCHMARK {
+ for (int i = 0; i < Iterations; ++i) {
+ Locker locker(&lock);
+ }
+ }
+}
+
+void tst_QReadWriteLock::uncontended_data()
+{
+ QTest::addColumn<FunctionPtrHolder>("holder");
+
+ QTest::newRow("nothing") << FunctionPtrHolder(testUncontended<int, FakeLock>);
+ QTest::newRow("QMutex") << FunctionPtrHolder(testUncontended<QMutex, QMutexLocker>);
+ QTest::newRow("QReadWriteLock, read")
+ << FunctionPtrHolder(testUncontended<QReadWriteLock, QReadLocker>);
+ QTest::newRow("QReadWriteLock, write")
+ << FunctionPtrHolder(testUncontended<QReadWriteLock, QWriteLocker>);
+ QTest::newRow("std::mutex") << FunctionPtrHolder(
+ testUncontended<std::mutex, LockerWrapper<std::unique_lock<std::mutex>>>);
+#if defined __cpp_lib_shared_timed_mutex
+ QTest::newRow("std::shared_timed_mutex, read") << FunctionPtrHolder(
+ testUncontended<std::shared_timed_mutex,
+ LockerWrapper<std::shared_lock<std::shared_timed_mutex>>>);
+ QTest::newRow("std::shared_timed_mutex, write") << FunctionPtrHolder(
+ testUncontended<std::shared_timed_mutex,
+ LockerWrapper<std::unique_lock<std::shared_timed_mutex>>>);
+#endif
+}
+
+void tst_QReadWriteLock::uncontended()
+{
+ QFETCH(FunctionPtrHolder, holder);
+ holder.value();
+}
+
+static QHash<QString, QString> global_hash;
+
+template <typename Mutex, typename Locker>
+void testReadOnly()
+{
+ struct Thread : QThread
+ {
+ Mutex *lock;
+ void run()
+ {
+ for (int i = 0; i < Iterations; ++i) {
+ QString s = QString::number(i); // Do something outside the lock
+ Locker locker(lock);
+ global_hash.contains(s);
+ }
+ }
+ };
+ Mutex lock;
+ QVector<QThread *> threads;
+ for (int i = 0; i < threadCount; ++i) {
+ auto t = new Thread;
+ t->lock = &lock;
+ threads.append(t);
+ }
+ QBENCHMARK {
+ for (auto t : threads) {
+ t->start();
+ }
+ for (auto t : threads) {
+ t->wait();
+ }
+ }
+ qDeleteAll(threads);
+}
+
+void tst_QReadWriteLock::readOnly_data()
+{
+ QTest::addColumn<FunctionPtrHolder>("holder");
+
+ QTest::newRow("nothing") << FunctionPtrHolder(testReadOnly<int, FakeLock>);
+ QTest::newRow("QMutex") << FunctionPtrHolder(testReadOnly<QMutex, QMutexLocker>);
+ QTest::newRow("QReadWriteLock") << FunctionPtrHolder(testReadOnly<QReadWriteLock, QReadLocker>);
+ QTest::newRow("std::mutex") << FunctionPtrHolder(
+ testReadOnly<std::mutex, LockerWrapper<std::unique_lock<std::mutex>>>);
+#if defined __cpp_lib_shared_timed_mutex
+ QTest::newRow("std::shared_timed_mutex") << FunctionPtrHolder(
+ testReadOnly<std::shared_timed_mutex,
+ LockerWrapper<std::shared_lock<std::shared_timed_mutex>>>);
+#endif
+}
+
+void tst_QReadWriteLock::readOnly()
+{
+ QFETCH(FunctionPtrHolder, holder);
+ holder.value();
+}
+
+QTEST_MAIN(tst_QReadWriteLock)
+#include "tst_qreadwritelock.moc"
diff --git a/tests/benchmarks/corelib/thread/thread.pro b/tests/benchmarks/corelib/thread/thread.pro
index 4e602ceb4e..6b3009bd0c 100644
--- a/tests/benchmarks/corelib/thread/thread.pro
+++ b/tests/benchmarks/corelib/thread/thread.pro
@@ -1,6 +1,7 @@
TEMPLATE = subdirs
SUBDIRS = \
qmutex \
+ qreadwritelock \
qthreadstorage \
qthreadpool \
qwaitcondition \