Mercurial > hg > truffle
view test/compiler/rtm/locking/TestRTMLockingThreshold.java @ 19098:71302ef5f55a
small refactoring in DefaultTruffleSplittingStrategyNew
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Tue, 03 Feb 2015 16:09:16 +0100 |
parents | ba8268c23fa2 |
children |
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/* * Copyright (c) 2014, 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. * */ /** * @test * @bug 8031320 * @summary Verify that RTMLockingThreshold affects rtm state transition * ProfileRTM => UseRTM. * @library /testlibrary /testlibrary/whitebox /compiler/testlibrary * @build TestRTMLockingThreshold * @run main ClassFileInstaller sun.hotspot.WhiteBox * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions * -XX:+WhiteBoxAPI TestRTMLockingThreshold */ import java.util.List; import com.oracle.java.testlibrary.*; import com.oracle.java.testlibrary.cli.CommandLineOptionTest; import com.oracle.java.testlibrary.cli.predicate.AndPredicate; import rtm.*; import rtm.predicate.SupportedCPU; import rtm.predicate.SupportedVM; import sun.misc.Unsafe; /** * Test verifies that RTMLockingThreshold option actually affects how soon * method will be deoptimized on low abort ratio. */ public class TestRTMLockingThreshold extends CommandLineOptionTest { private TestRTMLockingThreshold() { super(new AndPredicate(new SupportedVM(), new SupportedCPU())); } /** * We use non-zero abort threshold to avoid abort related to * interrupts, VMM calls, etc. during first lock attempt. * */ private static final int ABORT_THRESHOLD = 10; @Override protected void runTestCases() throws Throwable { verifyLockingThreshold(0, false); verifyLockingThreshold(100, false); verifyLockingThreshold(1000, false); verifyLockingThreshold(0, true); verifyLockingThreshold(100, true); verifyLockingThreshold(1000, true); } private void verifyLockingThreshold(int lockingThreshold, boolean useStackLock) throws Throwable { CompilableTest test = new Test(); OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest( test, "-XX:CompileThreshold=1", CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks", useStackLock), "-XX:+UseRTMDeopt", "-XX:RTMTotalCountIncrRate=1", "-XX:RTMRetryCount=0", CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold", TestRTMLockingThreshold.ABORT_THRESHOLD), CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold", lockingThreshold), "-XX:RTMAbortRatio=100", "-XX:+PrintPreciseRTMLockingStatistics", Test.class.getName(), Boolean.toString(!useStackLock), Integer.toString(lockingThreshold) ); outputAnalyzer.shouldHaveExitValue(0); List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString( test.getMethodWithLockName(), outputAnalyzer.getOutput()); Asserts.assertEQ(statistics.size(), 2, "VM output should contain two " + "RTM locking statistics entries."); /** * We force abort on each odd iteration, so if RTMLockingThreshold==0, * then we have to make 1 call without abort to avoid rtm state * transition to NoRTM (otherwise actual abort ratio will be 100%), * and after that make 1 call with abort to force deoptimization. * This leads us to two locks for threshold 0. * For other threshold values we have to make RTMLockingThreshold + 1 * locks if locking threshold is even, or + 0 if odd. */ long expectedValue = lockingThreshold + (lockingThreshold == 0L ? 2L : lockingThreshold % 2L); RTMLockingStatistics statBeforeDeopt = null; for (RTMLockingStatistics s : statistics) { if (s.getTotalLocks() == expectedValue) { Asserts.assertNull(statBeforeDeopt, "Only one statistics entry should contain aborts"); statBeforeDeopt = s; } } Asserts.assertNotNull(statBeforeDeopt, "There should be exactly one " + "statistics entry corresponding to ProfileRTM state."); } public static class Test implements CompilableTest { // Following field have to be static in order to avoid escape analysis. @SuppressWarnings("UnsuedDeclaration") private static int field = 0; private static final int TOTAL_ITERATIONS = 10000; private static final Unsafe UNSAFE = Utils.getUnsafe(); private final Object monitor = new Object(); @Override public String getMethodWithLockName() { return this.getClass().getName() + "::lock"; } @Override public String[] getMethodsToCompileNames() { return new String[] { getMethodWithLockName(), sun.misc.Unsafe.class.getName() + "::addressSize" }; } public void lock(boolean abort) { synchronized(monitor) { if (abort) { Test.field += Test.UNSAFE.addressSize(); } } } /** * Usage: * Test <inflate monitor> */ public static void main(String args[]) throws Throwable { Asserts.assertGTE(args.length, 1, "One argument required."); Test t = new Test(); if (Boolean.valueOf(args[0])) { AbortProvoker.inflateMonitor(t.monitor); } for (int i = 0; i < Test.TOTAL_ITERATIONS; i++) { t.lock(i % 2 == 1); } } } public static void main(String args[]) throws Throwable { new TestRTMLockingThreshold().test(); } }