| /* |
| * 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() }; |
| } |
| |
| 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(); |
| boolean shouldBeInflated = Boolean.valueOf(args[0]); |
| if (shouldBeInflated) { |
| AbortProvoker.inflateMonitor(t.monitor); |
| } |
| for (int i = 0; i < Test.TOTAL_ITERATIONS; i++) { |
| AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated); |
| t.lock(i % 2 == 1); |
| } |
| } |
| } |
| |
| public static void main(String args[]) throws Throwable { |
| new TestRTMLockingThreshold().test(); |
| } |
| } |