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/*
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* Copyright (c) 2015, 2019 Oracle and/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.java.util.logging;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.atomic.AtomicInteger;
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import java.util.logging.LogRecord;
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import org.openjdk.jmh.annotations.Benchmark;
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import org.openjdk.jmh.annotations.BenchmarkMode;
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import org.openjdk.jmh.annotations.Mode;
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import org.openjdk.jmh.annotations.OutputTimeUnit;
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import org.openjdk.jmh.annotations.Param;
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import org.openjdk.jmh.annotations.Scope;
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import org.openjdk.jmh.annotations.State;
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import org.openjdk.jmh.infra.Blackhole;
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@State(value = Scope.Benchmark)
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@BenchmarkMode(Mode.AverageTime)
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@OutputTimeUnit(TimeUnit.NANOSECONDS)
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public class LoggingRuntimeMicros {
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// TestStack will add this number of calls to the call stack
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@Param({"4", "100", "1000"})
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// For more thorough testing, consider:
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// @Param({"4", "10", "100", "256", "1000"})
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public int depth;
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/** Logging handler for testing logging calls. */
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@State(value = Scope.Thread) // create a separate one for each worker thread
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public static class TestHandler extends java.util.logging.Handler {
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private final static AtomicInteger serialNum = new AtomicInteger(0);
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private final java.util.logging.Logger logger;
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private volatile LogRecord record;
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public TestHandler() {
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// Each instance uses its own logger
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logger = java.util.logging.Logger.getLogger("StackWalkBench" + serialNum.incrementAndGet());
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logger.setUseParentHandlers(false);
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logger.addHandler(this);
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}
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@Override
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public void publish(LogRecord record) {
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record.getSourceMethodName();
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this.record = record;
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}
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private LogRecord reset() {
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LogRecord record = this.record;
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this.record = null;
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return record;
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}
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public final LogRecord testInferCaller(String msg) {
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logger.info(msg);
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LogRecord rec = this.reset();
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if (!"testInferCaller".equals(rec.getSourceMethodName())) {
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throw new RuntimeException("bad caller: "
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+ rec.getSourceClassName() + "."
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+ rec.getSourceMethodName());
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}
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return rec;
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}
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public final LogRecord testLogp(String msg) {
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logger.logp(java.util.logging.Level.INFO, "foo", "bar", msg);
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LogRecord rec = this.reset();
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if (!"bar".equals(rec.getSourceMethodName())) {
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throw new RuntimeException("bad caller: "
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+ rec.getSourceClassName() + "."
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+ rec.getSourceMethodName());
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}
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return rec;
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}
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@Override public void flush() {}
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@Override public void close() throws SecurityException {}
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}
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/** Build a call stack of a given size, then run trigger code in it.
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* (Does not account for existing frames higher up in the JMH machinery).
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*/
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static class TestStack {
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final long fence;
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long current;
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final Runnable trigger;
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TestStack(long max, Runnable trigger) {
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this.fence = max;
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this.current = 0;
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this.trigger = trigger;
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}
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public void start() {
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one();
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}
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public void one() {
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if (check()) {
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two();
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}
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}
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void two() {
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if (check()) {
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three();
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}
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}
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private void three() {
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if (check()) {
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one();
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}
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}
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boolean check() {
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if (++current == fence) {
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trigger.run();
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return false;
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} else {
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return true;
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}
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}
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}
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@Benchmark
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public void testLoggingInferCaller(TestHandler handler, Blackhole bh) {
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final Blackhole localBH = bh;
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final boolean[] done = {false};
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new TestStack(depth, new Runnable() {
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public void run() {
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localBH.consume(handler.testInferCaller("test"));
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done[0] = true;
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}
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}).start();
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if (!done[0]) {
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throw new RuntimeException();
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}
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}
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@Benchmark
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public void testLoggingLogp(TestHandler handler, Blackhole bh) {
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final Blackhole localBH = bh;
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final boolean[] done = {false};
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new TestStack(depth, new Runnable() {
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public void run() {
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localBH.consume(handler.testLogp("test"));
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done[0] = true;
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}
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}).start();
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if (!done[0]) {
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throw new RuntimeException();
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}
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}
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}
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