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8254354: Add a withInvokeExactBehavior() VarHandle combinator

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Reviewed-by: psandoz, chegar
This commit is contained in:
Jorn Vernee 2020-11-10 23:26:02 +00:00
parent d6f1463cb3
commit 0a41ca6b75
12 changed files with 1660 additions and 459 deletions
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84
test/micro/org/openjdk/bench/java/lang/invoke/VarHandleExact.java Normal file
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/*
* Copyright (c) 2020, Oracle and/or its affiliates. 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.
*
* 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.java.lang.invoke;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.VarHandle;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.AverageTime)
@Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
@State(org.openjdk.jmh.annotations.Scope.Thread)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@Fork(3)
public class VarHandleExact {
static final VarHandle exact;
static final VarHandle generic;
static {
try {
generic = MethodHandles.lookup().findVarHandle(Data.class, "longField", long.class);
} catch (ReflectiveOperationException e) {
throw new RuntimeException(e);
}
exact = generic.withInvokeExactBehavior();
}
Data data;
static class Data {
long longField;
}
@Setup
public void setup() {
data = new Data();
}
@Benchmark
public void exact_exactInvocation() {
exact.set(data, (long) 42);
}
@Benchmark
public void generic_genericInvocation() {
generic.set(data, 42);
}
@Benchmark
public void generic_exactInvocation() {
generic.set(data, (long) 42);
}
}