79 lines
2.1 KiB
Java
79 lines
2.1 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(value = 3, jvmArgs = {"-XX:+UseParallelGC", "-Xmx128m"})
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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 SafePublishing {
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@Benchmark
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public Object plain() {
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return new Plain();
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}
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@Benchmark
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public Object release() {
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return new Release();
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}
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@Benchmark
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public Object storeStore() {
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return new StoreStore();
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}
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static class Plain {
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int x;
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public Plain() {
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x = 1;
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VarHandle.releaseFence();
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}
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}
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static class Release {
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int x;
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public Release() {
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x = 1;
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VarHandle.releaseFence();
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}
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}
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static class StoreStore {
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int x;
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public StoreStore() {
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x = 1;
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VarHandle.storeStoreFence();
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}
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}
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}
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