| /* |
| * Copyright (c) 2014, 2016, 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 RTMAbortRatio affects amount of aborts before |
| * deoptimization. |
| * @library /test/lib / |
| * @modules java.base/jdk.internal.misc |
| * java.management |
| * @requires vm.flavor == "server" & !vm.emulatedClient & vm.rtm.cpu & vm.rtm.os |
| * @build sun.hotspot.WhiteBox |
| * @run driver ClassFileInstaller sun.hotspot.WhiteBox |
| * sun.hotspot.WhiteBox$WhiteBoxPermission |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions |
| * -XX:+WhiteBoxAPI |
| * compiler.rtm.locking.TestRTMAbortRatio |
| */ |
| |
| package compiler.rtm.locking; |
| |
| import compiler.testlibrary.rtm.AbortProvoker; |
| import compiler.testlibrary.rtm.CompilableTest; |
| import compiler.testlibrary.rtm.RTMLockingStatistics; |
| import compiler.testlibrary.rtm.RTMTestBase; |
| import jdk.internal.misc.Unsafe; |
| import jdk.test.lib.Asserts; |
| import jdk.test.lib.process.OutputAnalyzer; |
| import jdk.test.lib.cli.CommandLineOptionTest; |
| |
| import java.util.List; |
| |
| /** |
| * Test verifies that method will be deoptimized on high abort ratio |
| * as soon as abort ratio reaches RTMAbortRatio's value. |
| */ |
| public class TestRTMAbortRatio { |
| |
| protected void runTestCases() throws Throwable { |
| verifyAbortRatio(0, false); |
| verifyAbortRatio(10, false); |
| verifyAbortRatio(50, false); |
| verifyAbortRatio(100, false); |
| |
| verifyAbortRatio(0, true); |
| verifyAbortRatio(10, true); |
| verifyAbortRatio(50, true); |
| verifyAbortRatio(100, true); |
| } |
| |
| private void verifyAbortRatio(int abortRatio, boolean useStackLock) |
| throws Throwable { |
| CompilableTest test = new Test(); |
| |
| OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest( |
| test, |
| CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks", |
| useStackLock), |
| "-XX:+UseRTMDeopt", |
| "-XX:RTMTotalCountIncrRate=1", |
| "-XX:RTMAbortThreshold=0", |
| CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold", |
| 10 * Test.TOTAL_ITERATIONS), |
| CommandLineOptionTest.prepareNumericFlag("RTMAbortRatio", |
| abortRatio), |
| "-XX:+PrintPreciseRTMLockingStatistics", |
| test.getClass().getName(), |
| Boolean.toString(!useStackLock)); |
| |
| outputAnalyzer.shouldHaveExitValue(0); |
| |
| List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString( |
| test.getMethodWithLockName(), outputAnalyzer.getOutput()); |
| |
| Asserts.assertEQ(statistics.size(), 1, "VM output should contain " |
| + "exactly one RTM locking statistics entry."); |
| |
| RTMLockingStatistics lock = statistics.get(0); |
| int actualRatio; |
| |
| if (lock.getTotalAborts() == 1L) { |
| actualRatio = 0; |
| } else { |
| actualRatio = (int) (lock.getTotalLocks() |
| / (lock.getTotalAborts() - 1L)); |
| } |
| |
| Asserts.assertLTE(actualRatio, abortRatio, String.format( |
| "Actual abort ratio (%d) should lower or equal to " |
| + "specified (%d).", actualRatio, abortRatio)); |
| } |
| |
| /** |
| * Force abort after {@code Test.WARMUP_ITERATIONS} is done. |
| */ |
| public static class Test implements CompilableTest { |
| private static final int TOTAL_ITERATIONS = 10000; |
| private static final int WARMUP_ITERATIONS = 1000; |
| private static final Unsafe UNSAFE = Unsafe.getUnsafe(); |
| private final Object monitor = new Object(); |
| // Following field have to be static in order to avoid escape analysis. |
| @SuppressWarnings("UnsuedDeclaration") |
| private static int field = 0; |
| |
| @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.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 >= Test.WARMUP_ITERATIONS); |
| } |
| } |
| } |
| |
| public static void main(String args[]) throws Throwable { |
| new TestRTMAbortRatio().runTestCases(); |
| } |
| } |
| |