/*
* Copyright (c) 2013, 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.
*
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package org.graalvm.compiler.debug.test;
import static org.junit.Assert.assertEquals;
import java.lang.management.ThreadMXBean;
import org.graalvm.compiler.debug.Debug;
import org.graalvm.compiler.debug.DebugCloseable;
import org.graalvm.compiler.debug.DebugConfig;
import org.graalvm.compiler.debug.DebugConfigScope;
import org.graalvm.compiler.debug.DebugTimer;
import org.graalvm.compiler.debug.Management;
import org.graalvm.compiler.options.OptionValues;
import org.graalvm.util.EconomicMap;
import org.junit.Assume;
import org.junit.Before;
import org.junit.Test;
@SuppressWarnings("try")
public class DebugTimerTest {
private static final ThreadMXBean threadMXBean = Management.getThreadMXBean();
@Before
public void checkCapabilities() {
Assume.assumeTrue("skipping management interface test", threadMXBean.isCurrentThreadCpuTimeSupported());
}
/**
* Actively spins the current thread for at least a given number of milliseconds in such a way
* that timers for the current thread keep ticking over.
*
* @return the number of milliseconds actually spent spinning which is guaranteed to be >=
* {@code ms}
*/
private static long spin(long ms) {
long start = threadMXBean.getCurrentThreadCpuTime();
do {
long durationMS = (threadMXBean.getCurrentThreadCpuTime() - start) / 1000;
if (durationMS >= ms) {
return durationMS;
}
} while (true);
}
/**
* Asserts that a timer replied recursively without any other interleaving timers has the same
* flat and accumulated times.
*/
@Test
public void test2() {
OptionValues options = new OptionValues(EconomicMap.create());
DebugConfig debugConfig = Debug.fixedConfig(options, 0, 0, false, false, true, false, false, null, null, System.out);
try (DebugConfigScope dcs = new DebugConfigScope(debugConfig); Debug.Scope s = Debug.scope("DebugTimerTest")) {
DebugTimer timerC = Debug.timer("TimerC");
try (DebugCloseable c1 = timerC.start()) {
spin(50);
try (DebugCloseable c2 = timerC.start()) {
spin(50);
try (DebugCloseable c3 = timerC.start()) {
spin(50);
try (DebugCloseable c4 = timerC.start()) {
spin(50);
try (DebugCloseable c5 = timerC.start()) {
spin(50);
}
}
}
}
}
if (timerC.getFlat() != null) {
assertEquals(timerC.getFlat().getCurrentValue(), timerC.getCurrentValue());
}
}
}
}