diff options
author | Thiago Macieira <thiago.macieira@intel.com> | 2012-04-09 11:37:25 -0300 |
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committer | The Qt Project <gerrit-noreply@qt-project.org> | 2013-03-06 21:50:28 +0100 |
commit | 9d72259f943a3b31fa4e32aeb1c5a2de3d8ca611 (patch) | |
tree | bbe81012555fc1829592d66c186a2422321b60d0 /src/testlib/qbenchmarkperfevents.cpp | |
parent | 24f059eed0be5b901bbb81ce921a942ca785fe1d (diff) |
Add the skeleton Linux perf events counter for QtTest
Currently, it only prints "perf available" if you use the -perf option
and perf is available. The implementation comes in the next commits.
Change-Id: Ic6cdee70e21df25780799a4bc31ca2c2d923b9f8
Reviewed-by: Jason McDonald <macadder1@gmail.com>
Diffstat (limited to 'src/testlib/qbenchmarkperfevents.cpp')
-rw-r--r-- | src/testlib/qbenchmarkperfevents.cpp | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/testlib/qbenchmarkperfevents.cpp b/src/testlib/qbenchmarkperfevents.cpp new file mode 100644 index 0000000000..8c2a4852b4 --- /dev/null +++ b/src/testlib/qbenchmarkperfevents.cpp @@ -0,0 +1,115 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Intel Corporation. +** Contact: http://www.qt-project.org/legal +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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 Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qbenchmarkperfevents_p.h" +#include "qbenchmark_p.h" + +#ifdef QTESTLIB_USE_PERF_EVENTS + +#include <sys/types.h> +#include <errno.h> + +#include <sys/syscall.h> + +#include "3rdparty/linux_perf_event_p.h" + +QT_BEGIN_NAMESPACE + + +static int perf_event_open(perf_event_attr *attr, pid_t pid, int cpu, int group_fd, unsigned long flags) +{ + return syscall(SYS_perf_event_open, attr, pid, cpu, group_fd, flags); +} + +bool QBenchmarkPerfEventsMeasurer::isAvailable() +{ + // this generates an EFAULT because attr == NULL if perf_event_open is available + // if the kernel is too old, it generates ENOSYS + return perf_event_open(0, 0, 0, 0, 0) == -1 && errno != ENOSYS; +} + +QBenchmarkPerfEventsMeasurer::QBenchmarkPerfEventsMeasurer() +{ +} + +QBenchmarkPerfEventsMeasurer::~QBenchmarkPerfEventsMeasurer() +{ +} + +void QBenchmarkPerfEventsMeasurer::init() +{ +} + +void QBenchmarkPerfEventsMeasurer::start() +{ +} + +qint64 QBenchmarkPerfEventsMeasurer::checkpoint() +{ +} + +qint64 QBenchmarkPerfEventsMeasurer::stop() +{ +} + +bool QBenchmarkPerfEventsMeasurer::isMeasurementAccepted(qint64) +{ + return true; +} + +int QBenchmarkPerfEventsMeasurer::adjustIterationCount(int) +{ + return 1; +} + +int QBenchmarkPerfEventsMeasurer::adjustMedianCount(int) +{ + return 1; +} + +QTest::QBenchmarkMetric QBenchmarkPerfEventsMeasurer::metricType() +{ + return QTest::Events; +} + +#endif + +QT_END_NAMESPACE |