Mercurial > hg > graal-compiler
view graal/com.oracle.jvmci.debug.test/src/com/oracle/jvmci/debug/test/DebugTimerTest.java @ 21671:8d0c2aabfc2d
missed Graal -> JVMCI renamings
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 02 Jun 2015 19:11:34 +0200 |
parents | f5b549811bac |
children |
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/* * Copyright (c) 2013, 2013, 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 com.oracle.jvmci.debug.test; import static org.junit.Assert.*; import java.lang.management.*; import org.junit.*; import com.oracle.jvmci.debug.*; public class DebugTimerTest { private static final ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean(); /** * 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); } @Test public void test1() { DebugConfig debugConfig = Debug.fixedConfig(0, 0, false, false, true, false, null, null, System.out); try (DebugConfigScope dcs = new DebugConfigScope(debugConfig); Debug.Scope s = Debug.scope("DebugTimerTest")) { DebugTimer timerA = Debug.timer("TimerA"); DebugTimer timerB = Debug.timer("TimerB"); long spinA; long spinB; try (DebugCloseable a1 = timerA.start()) { spinA = spin(50); try (DebugCloseable b1 = timerB.start()) { spinB = spin(50); } } Assert.assertTrue(timerB.getCurrentValue() < timerA.getCurrentValue()); if (timerA.getFlat() != null && timerB.getFlat() != null) { assertTrue(spinB >= spinA || timerB.getFlat().getCurrentValue() < timerA.getFlat().getCurrentValue()); assertEquals(timerA.getFlat().getCurrentValue(), timerA.getCurrentValue() - timerB.getFlat().getCurrentValue(), 10D); } } } @Test public void test2() { DebugConfig debugConfig = Debug.fixedConfig(0, 0, false, false, true, 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()); } } } @Test public void test3() { DebugConfig debugConfig = Debug.fixedConfig(0, 0, false, false, true, false, null, null, System.out); try (DebugConfigScope dcs = new DebugConfigScope(debugConfig); Debug.Scope s = Debug.scope("DebugTimerTest")) { DebugTimer timerD = Debug.timer("TimerD"); DebugTimer timerE = Debug.timer("TimerE"); long spinD1; long spinE; try (DebugCloseable d1 = timerD.start()) { spinD1 = spin(50); try (DebugCloseable e1 = timerE.start()) { spinE = spin(50); try (DebugCloseable d2 = timerD.start()) { spin(50); try (DebugCloseable d3 = timerD.start()) { spin(50); } } } } Assert.assertTrue(timerE.getCurrentValue() < timerD.getCurrentValue()); if (timerD.getFlat() != null && timerE.getFlat() != null) { assertTrue(spinE >= spinD1 || timerE.getFlat().getCurrentValue() < timerD.getFlat().getCurrentValue()); assertEquals(timerD.getFlat().getCurrentValue(), timerD.getCurrentValue() - timerE.getFlat().getCurrentValue(), 10D); } } } }