CompilerHintsBench.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
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 * 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).
 *
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package org.openjdk.jmh.benchmarks;

import org.openjdk.jmh.annotations.*;

import java.util.concurrent.TimeUnit;

@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@State(Scope.Thread)
public class CompilerHintsBench {

    @Benchmark
    public void baseI_baseline() {
        do_Plain(Math.PI);
    }

    @Benchmark
    @Fork(jvmArgsPrepend = {"-XX:MaxInlineSize=0", "-XX:FreqInlineSize=0"})
    public void baseNI_baseline() {
        do_Plain(Math.PI);
    }

    @Benchmark
    public void baseI_inline() {
        do_Inline(Math.PI);
    }

    @Benchmark
    @Fork(jvmArgsPrepend = {"-XX:MaxInlineSize=0", "-XX:FreqInlineSize=0"})
    public void baseNI_inline() {
        do_Inline(Math.PI);
    }

    @Benchmark
    public void baseI_dontInline() {
        do_DontInline(Math.PI);
    }

    @Benchmark
    @Fork(jvmArgsPrepend = {"-XX:MaxInlineSize=0", "-XX:FreqInlineSize=0"})
    public void baseNI_dontInline() {
        do_DontInline(Math.PI);
    }

    @Benchmark
    public void baseI_exclude() {
        do_Exclude(Math.PI);
    }

    @Benchmark
    @Fork(jvmArgsPrepend = {"-XX:MaxInlineSize=0", "-XX:FreqInlineSize=0"})
    public void baseNI_exclude() {
        do_Exclude(Math.PI);
    }

    private double do_Plain(double x) {
        return Math.log(x);
    }

    @CompilerControl(CompilerControl.Mode.INLINE)
    private double do_Inline(double x) {
        return Math.log(x);
    }

    @CompilerControl(CompilerControl.Mode.DONT_INLINE)
    private double do_DontInline(double x) {
        return Math.log(x);
    }

    @CompilerControl(CompilerControl.Mode.EXCLUDE)
    private double do_Exclude(double x) {
        return Math.log(x);
    }


}