Mercurial > hg > graal-compiler
diff graal/com.oracle.jvmci.debug.test/src/com/oracle/jvmci/debug/test/DebugTimerTest.java @ 21554:b1530a6cce8c
renamed com.oracle.graal.[debug|options|hotspotvmconfig]* modules to com.oracle.jvmci.[debug|options|hotspotvmconfig]* modules (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Tue, 26 May 2015 23:21:15 +0200 |
parents | graal/com.oracle.graal.debug.test/src/com/oracle/graal/debug/test/DebugTimerTest.java@fa75218e3942 |
children | f5b549811bac |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.jvmci.debug.test/src/com/oracle/jvmci/debug/test/DebugTimerTest.java Tue May 26 23:21:15 2015 +0200 @@ -0,0 +1,138 @@ +/* + * 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); + } + } + } +}