diff -r 6841a4be0faa -r 54399106938f hotspot/test/compiler/rtm/locking/TestRTMLockingThreshold.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/hotspot/test/compiler/rtm/locking/TestRTMLockingThreshold.java Fri Apr 11 00:35:23 2014 +0400 @@ -0,0 +1,179 @@ +/* + * 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 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(); + } +}