110 lines
3.1 KiB
Java
110 lines
3.1 KiB
Java
/*
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* Copyright (c) 2021, Red Hat, Inc. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.openjdk.bench.vm.fences;
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import org.openjdk.jmh.annotations.*;
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import java.lang.invoke.VarHandle;
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import java.util.concurrent.TimeUnit;
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@Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
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@Measurement(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
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@Fork(3)
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@BenchmarkMode(Mode.AverageTime)
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@OutputTimeUnit(TimeUnit.NANOSECONDS)
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@State(Scope.Thread)
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public class MultipleWithLoads {
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int x, y, z;
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@Benchmark
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public int plain() {
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int t1 = x + y + z;
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int t2 = x + y + z;
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int t3 = x + y + z;
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return t1 + t2 + t3;
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}
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@Benchmark
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public int loadLoad() {
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VarHandle.loadLoadFence();
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int t1 = x + y + z;
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VarHandle.loadLoadFence();
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int t2 = x + y + z;
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VarHandle.loadLoadFence();
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int t3 = x + y + z;
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VarHandle.loadLoadFence();
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return t1 + t2 + t3;
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}
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@Benchmark
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public int storeStore() {
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VarHandle.storeStoreFence();
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int t1 = x + y + z;
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VarHandle.storeStoreFence();
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int t2 = x + y + z;
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VarHandle.storeStoreFence();
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int t3 = x + y + z;
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VarHandle.storeStoreFence();
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return t1 + t2 + t3;
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}
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@Benchmark
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public int acquire() {
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VarHandle.acquireFence();
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int t1 = x + y + z;
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VarHandle.acquireFence();
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int t2 = x + y + z;
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VarHandle.acquireFence();
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int t3 = x + y + z;
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VarHandle.acquireFence();
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return t1 + t2 + t3;
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}
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@Benchmark
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public int release() {
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VarHandle.releaseFence();
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int t1 = x + y + z;
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VarHandle.releaseFence();
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int t2 = x + y + z;
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VarHandle.releaseFence();
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int t3 = x + y + z;
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VarHandle.releaseFence();
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return t1 + t2 + t3;
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}
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@Benchmark
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public int full() {
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VarHandle.fullFence();
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int t1 = x + y + z;
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VarHandle.fullFence();
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int t2 = x + y + z;
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VarHandle.fullFence();
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int t3 = x + y + z;
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VarHandle.fullFence();
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return t1 + t2 + t3;
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}
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}
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