109 lines
4.0 KiB
Java
109 lines
4.0 KiB
Java
/*
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* Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.openjdk.bench.vm.compiler;
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import org.openjdk.jmh.annotations.*;
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import org.openjdk.jmh.infra.Blackhole;
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import java.util.concurrent.TimeUnit;
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@Warmup(iterations = 5, time = 300, timeUnit = TimeUnit.MILLISECONDS)
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@Measurement(iterations = 5, time = 300, timeUnit = TimeUnit.MILLISECONDS)
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@Fork(value = 3, jvmArgs = {"-XX:+TieredCompilation", "-XX:TieredStopAtLevel=1"})
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@BenchmarkMode(Mode.AverageTime)
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@OutputTimeUnit(TimeUnit.NANOSECONDS)
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@Threads(1)
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@State(Scope.Benchmark)
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public class SecondarySuperCacheHits {
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// This test targets C1 specifically, to enter the interesting code path
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// without heavily optimizing compiler like C2 optimizing based on profiles,
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// or folding the instanceof checks.
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// The test verifies what happens on a happy path, when we can actually cache
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// the last super and use it effectively.
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interface I01 {}
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interface I02 {}
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interface I03 {}
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interface I04 {}
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interface I05 {}
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interface I06 {}
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interface I07 {}
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interface I08 {}
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interface I09 {}
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interface I10 {}
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interface I11 {}
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interface I12 {}
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interface I13 {}
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interface I14 {}
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interface I15 {}
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interface I16 {}
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interface I17 {}
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interface I18 {}
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interface I19 {}
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interface I20 {}
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class B {}
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class C1 extends B implements I01, I02, I03, I04, I05, I06, I07, I08, I09, I10, I11, I12, I13, I14, I15, I16, I17, I18, I19, I20 {}
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volatile B o;
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@Setup
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public void setup() {
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o = new C1();
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}
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static final int ITERS = 10000;
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@Benchmark
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@OperationsPerInvocation(20*ITERS)
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public void test(Blackhole bh) {
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I01);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I02);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I03);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I04);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I05);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I06);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I07);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I08);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I09);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I10);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I11);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I12);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I13);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I14);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I15);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I16);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I17);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I18);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I19);
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for (int c = 0; c < ITERS; c++) bh.consume(o instanceof I20);
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}
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}
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