| /* |
| * Copyright (c) 2015, 2015, 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 micro.benchmarks; |
| |
| import org.openjdk.jmh.annotations.Benchmark; |
| import org.openjdk.jmh.annotations.Level; |
| import org.openjdk.jmh.annotations.Scope; |
| import org.openjdk.jmh.annotations.Setup; |
| import org.openjdk.jmh.annotations.State; |
| import org.openjdk.jmh.annotations.Warmup; |
| |
| import org.graalvm.compiler.microbenchmarks.graal.GraalBenchmark; |
| |
| /** |
| * Benchmarks cost of guarded intrinsics at indirect call sites. |
| */ |
| public class GuardedIntrinsicBenchmark extends GraalBenchmark { |
| |
| public static class HashcodeState { |
| public Object val1; |
| public Object val2; |
| |
| public HashcodeState(Object val1, Object val2) { |
| this.val1 = val1; |
| this.val2 = val2; |
| } |
| |
| int getNextHashCode() { |
| return val1.hashCode(); |
| } |
| |
| protected void swap() { |
| Object tmp = val1; |
| val1 = val2; |
| val2 = tmp; |
| } |
| } |
| |
| /** |
| * Objects that all override {@link Object#hashCode()}. The objects used have hashCode |
| * implementations that are basically getters as we want to measure the overhead of hashCode |
| * dispatch, not the cost of the hashCode implementation. |
| */ |
| @State(Scope.Benchmark) |
| public static class OverrideHashcode extends HashcodeState { |
| public OverrideHashcode() { |
| super(Short.valueOf((short) 100), Integer.valueOf(42)); |
| } |
| |
| @Setup(Level.Invocation) |
| public void beforeInvocation() { |
| swap(); |
| } |
| } |
| |
| @Benchmark |
| @Warmup(iterations = 10) |
| public int overrideHashCode(OverrideHashcode state) { |
| return state.getNextHashCode(); |
| } |
| |
| /** |
| * Objects that do not override {@link Object#hashCode()}. |
| */ |
| @State(Scope.Benchmark) |
| public static class InheritHashcode extends HashcodeState { |
| public InheritHashcode() { |
| super(Class.class, Runtime.getRuntime()); |
| } |
| |
| @Setup(Level.Invocation) |
| public void beforeInvocation() { |
| swap(); |
| } |
| } |
| |
| @Benchmark |
| @Warmup(iterations = 10) |
| public int inheritHashCode(InheritHashcode state) { |
| return state.getNextHashCode(); |
| } |
| |
| /** |
| * Some objects that override {@link Object#hashCode()} and some that don't. |
| */ |
| @State(Scope.Benchmark) |
| public static class MixedHashcode extends HashcodeState { |
| public MixedHashcode() { |
| super(Short.valueOf((short) 100), Runtime.getRuntime()); |
| } |
| |
| @Setup(Level.Invocation) |
| public void beforeInvocation() { |
| swap(); |
| } |
| } |
| |
| @Benchmark |
| @Warmup(iterations = 10) |
| public int mixedHashCode(MixedHashcode state) { |
| return state.getNextHashCode(); |
| } |
| } |