Add benchmark suite for QFrameAllocator.

Results for instr:k perf counter on my machine are:

********* Start testing of tst_QFrameAllocator *********
Config: Using QtTest library 5.5.0, Qt 5.5.0 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC
4.9.2)
PASS   : tst_QFrameAllocator::initTestCase()
PASS   : tst_QFrameAllocator::benchmarkAllocateSmall()
RESULT : tst_QFrameAllocator::benchmarkAllocateSmall():
     1,060,442 instructions per iteration (total: 1,060,442, iterations: 1)
PASS   : tst_QFrameAllocator::benchmarkAllocateBig()
RESULT : tst_QFrameAllocator::benchmarkAllocateBig():
     1,145,940 instructions per iteration (total: 1,145,940, iterations: 1)
PASS   : tst_QFrameAllocator::benchmarkDeallocateSmall()
RESULT : tst_QFrameAllocator::benchmarkDeallocateSmall():
     901,579 instructions per iteration (total: 901,579, iterations: 1)
PASS   : tst_QFrameAllocator::benchmarkDeallocateBig()
RESULT : tst_QFrameAllocator::benchmarkDeallocateBig():
     901,579 instructions per iteration (total: 901,579, iterations: 1)
PASS   : tst_QFrameAllocator::benchmarkAllocateRaw()
RESULT : tst_QFrameAllocator::benchmarkAllocateRaw():
     1,067,539 instructions per iteration (total: 1,067,539, iterations: 1)
PASS   : tst_QFrameAllocator::benchmarkDeallocateRaw()
RESULT : tst_QFrameAllocator::benchmarkDeallocateRaw():
     971,701 instructions per iteration (total: 971,701, iterations: 1)
PASS   : tst_QFrameAllocator::cleanupTestCase()
Totals: 8 passed, 0 failed, 0 skipped, 0 blacklisted
********* Finished testing of tst_QFrameAllocator *********

Change-Id: Iae2bcd53d4efcff4b8486b4571dc1d1acfcbc19d
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

1 files changed, 148 insertions, 0 deletions

diff --git a/tests/benchmarks/core/qframeallocator/tst_bench_qframeallocator.cpp b/tests/benchmarks/core/qframeallocator/tst_bench_qframeallocator.cpp
new file mode 100644
index 000000000..bcea3a9d7
--- /dev/null
+++ b/tests/benchmarks/core/qframeallocator/tst_bench_qframeallocator.cpp
@@ -0,0 +1,148 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt3D 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 <QObject>
+#include <QtTest/QtTest>
+
+#include <Qt3DCore/QFrameAllocator>
+
+using namespace Qt3D;
+
+class tst_QFrameAllocator : public QObject
+{
+    Q_OBJECT
+
+private Q_SLOTS:
+    void benchmarkAllocateSmall();
+    void benchmarkAllocateBig();
+    void benchmarkDeallocateSmall();
+    void benchmarkDeallocateBig();
+    void benchmarkAllocateRaw();
+    void benchmarkDeallocateRaw();
+};
+
+namespace {
+template<uint Size>
+struct Object {
+    char data[Size];
+};
+
+template<uint Size>
+void benchmarkAlloc()
+{
+    QFrameAllocator allocator(128, 16, 128);
+    QVector<Object<Size>*> items(10000);
+    QBENCHMARK_ONCE {
+        for (int i = 0; i < items.size(); ++i) {
+            items[i] = allocator.allocate< Object<Size> >();
+        }
+    }
+    foreach (Object<Size>* item, items) {
+        allocator.deallocate(item);
+    }
+}
+
+template<uint Size>
+void benchmarkDealloc()
+{
+    QFrameAllocator allocator(128, 16, 128);
+    QVector<Object<Size>*> items(10000);
+    for (int i = 0; i < items.size(); ++i) {
+        items[i] = allocator.allocate< Object<Size> >();
+    }
+    QBENCHMARK_ONCE {
+        foreach (Object<Size>* item, items) {
+            allocator.deallocate(item);
+        }
+    }
+}
+}
+
+void tst_QFrameAllocator::benchmarkAllocateSmall()
+{
+    benchmarkAlloc<16>();
+}
+
+void tst_QFrameAllocator::benchmarkAllocateBig()
+{
+    benchmarkAlloc<128>();
+}
+
+void tst_QFrameAllocator::benchmarkDeallocateSmall()
+{
+    benchmarkDealloc<16>();
+}
+
+void tst_QFrameAllocator::benchmarkDeallocateBig()
+{
+    benchmarkDealloc<128>();
+}
+
+void tst_QFrameAllocator::benchmarkAllocateRaw()
+{
+    QFrameAllocator allocator(128, 16, 128);
+    QVector<void*> items(10000);
+    QBENCHMARK_ONCE {
+        for (int i = 0; i < items.size(); ++i) {
+            items[i] = allocator.allocateRawMemory(i % 128 + 1);
+        }
+    }
+    for (int i = 0; i < items.size(); ++i) {
+        allocator.deallocateRawMemory(items[i], i % 128 + 1);
+    }
+}
+
+void tst_QFrameAllocator::benchmarkDeallocateRaw()
+{
+    QFrameAllocator allocator(128, 16, 128);
+    QVector<void*> items(10000);
+    for (int i = 0; i < items.size(); ++i) {
+        items[i] = allocator.allocateRawMemory(i % 128 + 1);
+    }
+    QBENCHMARK_ONCE {
+        for (int i = 0; i < items.size(); ++i) {
+            allocator.deallocateRawMemory(items[i], i % 128 + 1);
+        }
+    }
+}
+
+QTEST_APPLESS_MAIN(tst_QFrameAllocator)
+#include "tst_bench_qframeallocator.moc"