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8276054: JMH benchmarks for Fences
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Reviewed-by: redestad
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@shipilev
shipilev committed Oct 28, 2021
1 parent 6d8fa8f commit 5a768f7
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85 changes: 85 additions & 0 deletions test/micro/org/openjdk/bench/vm/fences/Multiple.java
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/*
* Copyright (c) 2021, Red Hat, Inc. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

package org.openjdk.bench.vm.fences;

import org.openjdk.jmh.annotations.*;

import java.lang.invoke.VarHandle;
import java.util.concurrent.TimeUnit;

@Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
@Fork(3)
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
public class Multiple {

@Benchmark
public void plain() {
// Do nothing
}

@Benchmark
public void loadLoad() {
VarHandle.loadLoadFence();
VarHandle.loadLoadFence();
VarHandle.loadLoadFence();
VarHandle.loadLoadFence();
}

@Benchmark
public void storeStore() {
VarHandle.storeStoreFence();
VarHandle.storeStoreFence();
VarHandle.storeStoreFence();
VarHandle.storeStoreFence();
}

@Benchmark
public void acquire() {
VarHandle.acquireFence();
VarHandle.acquireFence();
VarHandle.acquireFence();
VarHandle.acquireFence();
}

@Benchmark
public void release() {
VarHandle.releaseFence();
VarHandle.releaseFence();
VarHandle.releaseFence();
VarHandle.releaseFence();
}

@Benchmark
public void full() {
VarHandle.fullFence();
VarHandle.fullFence();
VarHandle.fullFence();
VarHandle.fullFence();
}

}
111 changes: 111 additions & 0 deletions test/micro/org/openjdk/bench/vm/fences/MultipleWithLoads.java
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/*
* Copyright (c) 2021, Red Hat, Inc. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

package org.openjdk.bench.vm.fences;

import org.openjdk.jmh.annotations.*;

import java.lang.invoke.VarHandle;
import java.util.concurrent.TimeUnit;

@Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
@Fork(3)
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@State(Scope.Thread)
public class MultipleWithLoads {

int x, y, z;

@Benchmark
public int plain() {
int t1 = x + y + z;
int t2 = x + y + z;
int t3 = x + y + z;
return t1 + t2 + t3;
}

@Benchmark
public int loadLoad() {
VarHandle.loadLoadFence();
int t1 = x + y + z;
VarHandle.loadLoadFence();
int t2 = x + y + z;
VarHandle.loadLoadFence();
int t3 = x + y + z;
VarHandle.loadLoadFence();
return t1 + t2 + t3;
}

@Benchmark
public int storeStore() {
VarHandle.storeStoreFence();
int t1 = x + y + z;
VarHandle.storeStoreFence();
int t2 = x + y + z;
VarHandle.storeStoreFence();
int t3 = x + y + z;
VarHandle.storeStoreFence();
return t1 + t2 + t3;
}

@Benchmark
public int acquire() {
VarHandle.acquireFence();
int t1 = x + y + z;
VarHandle.acquireFence();
int t2 = x + y + z;
VarHandle.acquireFence();
int t3 = x + y + z;
VarHandle.acquireFence();
return t1 + t2 + t3;
}

@Benchmark
public int release() {
VarHandle.releaseFence();
int t1 = x + y + z;
VarHandle.releaseFence();
int t2 = x + y + z;
VarHandle.releaseFence();
int t3 = x + y + z;
VarHandle.releaseFence();
return t1 + t2 + t3;
}

@Benchmark
public int full() {
VarHandle.fullFence();
int t1 = x + y + z;
VarHandle.fullFence();
int t2 = x + y + z;
VarHandle.fullFence();
int t3 = x + y + z;
VarHandle.fullFence();
return t1 + t2 + t3;
}

}
105 changes: 105 additions & 0 deletions test/micro/org/openjdk/bench/vm/fences/MultipleWithStores.java
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/*
* Copyright (c) 2021, Red Hat, Inc. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

package org.openjdk.bench.vm.fences;

import org.openjdk.jmh.annotations.*;

import java.lang.invoke.VarHandle;
import java.util.concurrent.TimeUnit;

@Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
@Fork(3)
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@State(Scope.Thread)
public class MultipleWithStores {

int x, y, z;

@Benchmark
public void plain() {
x = 1;
y = 1;
z = 1;
}

@Benchmark
public void loadLoad() {
VarHandle.loadLoadFence();
x = 1;
VarHandle.loadLoadFence();
y = 1;
VarHandle.loadLoadFence();
z = 1;
VarHandle.loadLoadFence();
}

@Benchmark
public void storeStore() {
VarHandle.storeStoreFence();
x = 1;
VarHandle.storeStoreFence();
y = 1;
VarHandle.storeStoreFence();
z = 1;
VarHandle.storeStoreFence();
}

@Benchmark
public void acquire() {
VarHandle.releaseFence();
x = 1;
VarHandle.releaseFence();
y = 1;
VarHandle.releaseFence();
z = 1;
VarHandle.releaseFence();
}

@Benchmark
public void release() {
VarHandle.releaseFence();
x = 1;
VarHandle.releaseFence();
y = 1;
VarHandle.releaseFence();
z = 1;
VarHandle.releaseFence();
}

@Benchmark
public void full() {
VarHandle.fullFence();
x = 1;
VarHandle.fullFence();
y = 1;
VarHandle.fullFence();
z = 1;
VarHandle.fullFence();
}

}
80 changes: 80 additions & 0 deletions test/micro/org/openjdk/bench/vm/fences/SafePublishing.java
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/*
* Copyright (c) 2021, Red Hat, Inc. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

package org.openjdk.bench.vm.fences;

import org.openjdk.jmh.annotations.*;

import java.lang.invoke.VarHandle;
import java.util.concurrent.TimeUnit;

@Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
@Fork(value = 3, jvmArgsAppend = {"-XX:+UseParallelGC", "-Xmx128m"})
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@State(Scope.Thread)
public class SafePublishing {

@Benchmark
public Object plain() {
return new Plain();
}

@Benchmark
public Object release() {
return new Release();
}

@Benchmark
public Object storeStore() {
return new StoreStore();
}

static class Plain {
int x;
public Plain() {
x = 1;
VarHandle.releaseFence();
}
}

static class Release {
int x;
public Release() {
x = 1;
VarHandle.releaseFence();
}
}

static class StoreStore {
int x;
public StoreStore() {
x = 1;
VarHandle.storeStoreFence();
}
}

}

3 comments on commit 5a768f7

@openjdk-notifier
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Review

Issues

@shipilev
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/backport jdk17u-dev

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@openjdk openjdk bot commented on 5a768f7 Sep 27, 2023

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@shipilev the backport was successfully created on the branch shipilev-backport-5a768f75 in my personal fork of openjdk/jdk17u-dev. To create a pull request with this backport targeting openjdk/jdk17u-dev:master, just click the following link:

➡️ Create pull request

The title of the pull request is automatically filled in correctly and below you find a suggestion for the pull request body:

Hi all,

This pull request contains a backport of commit 5a768f75 from the openjdk/jdk repository.

The commit being backported was authored by Aleksey Shipilev on 28 Oct 2021 and was reviewed by Claes Redestad.

Thanks!

If you need to update the source branch of the pull then run the following commands in a local clone of your personal fork of openjdk/jdk17u-dev:

$ git fetch https://github.com/openjdk-bots/jdk17u-dev.git shipilev-backport-5a768f75:shipilev-backport-5a768f75
$ git checkout shipilev-backport-5a768f75
# make changes
$ git add paths/to/changed/files
$ git commit --message 'Describe additional changes made'
$ git push https://github.com/openjdk-bots/jdk17u-dev.git shipilev-backport-5a768f75

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