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8276054: JMH benchmarks for Fences
Reviewed-by: redestad
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shipilev committed Oct 28, 2021
1 parent 6d8fa8f commit 5a768f75c9cb013edbf6c61e79820bd180cad4ba
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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();
}

}
@@ -0,0 +1,111 @@
/*
* 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;
}

}
@@ -0,0 +1,105 @@
/*
* 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();
}

}
@@ -0,0 +1,80 @@
/*
* 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();
}
}

}

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