| /* |
| * 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 on low abort ratio method will be recompiled. |
| * @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.TestRTMDeoptOnLowAbortRatio |
| */ |
| |
| 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 low abort ratio method will be deoptimized with |
| * <i>rtm_state_change</i> reason and will continue to use RTM-based lock |
| * elision after that. |
| * This test make asserts on total locks count done by compiled method, |
| * so in order to avoid issue with retriable locks -XX:RTMRetryCount=0 is used. |
| * For more details on that issue see {@link TestUseRTMAfterLockInflation}. |
| */ |
| public class TestRTMDeoptOnLowAbortRatio { |
| private static final long LOCKING_THRESHOLD = 100L; |
| private static final long ABORT_THRESHOLD = LOCKING_THRESHOLD / 2L; |
| |
| protected void runTestCases() throws Throwable { |
| verifyRTMDeopt(false); |
| verifyRTMDeopt(true); |
| } |
| |
| private void verifyRTMDeopt(boolean useStackLock) throws Throwable { |
| CompilableTest test = new Test(); |
| String logFileName = String.format("rtm_deopt_%s_stack_lock.xml", |
| useStackLock ? "use" : "no"); |
| |
| OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest( |
| logFileName, |
| test, |
| "-XX:+UseRTMDeopt", |
| CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks", |
| useStackLock), |
| CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold", |
| TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD), |
| CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold", |
| TestRTMDeoptOnLowAbortRatio.ABORT_THRESHOLD), |
| "-XX:RTMAbortRatio=100", |
| "-XX:CompileThreshold=1", |
| "-XX:RTMRetryCount=0", |
| "-XX:RTMTotalCountIncrRate=1", |
| "-XX:+PrintPreciseRTMLockingStatistics", |
| Test.class.getName(), |
| Boolean.toString(!useStackLock) |
| ); |
| |
| outputAnalyzer.shouldHaveExitValue(0); |
| |
| int firedTraps = RTMTestBase.firedRTMStateChangeTraps(logFileName); |
| |
| Asserts.assertEQ(firedTraps, 1, |
| "Expected to get only one deoptimization due to rtm" |
| + " state change"); |
| |
| List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString( |
| test.getMethodWithLockName(), outputAnalyzer.getOutput()); |
| |
| Asserts.assertEQ(statistics.size(), 2, |
| "VM output should contain two RTM locking " |
| + "statistics entries for method " |
| + test.getMethodWithLockName()); |
| |
| RTMLockingStatistics statisticsBeforeDeopt = null; |
| |
| for (RTMLockingStatistics s : statistics) { |
| if (s.getTotalLocks() |
| == TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD) { |
| Asserts.assertNull(statisticsBeforeDeopt, |
| "Only one abort was expected during test run"); |
| statisticsBeforeDeopt = s; |
| } |
| } |
| |
| Asserts.assertNotNull(statisticsBeforeDeopt, |
| "After LockThreshold was reached, method should be recompiled " |
| + "with rtm lock eliding."); |
| } |
| |
| public static class Test implements CompilableTest { |
| private static final Unsafe UNSAFE = Unsafe.getUnsafe(); |
| private final Object monitor = new Object(); |
| |
| @Override |
| public String getMethodWithLockName() { |
| return this.getClass().getName() + "::forceAbort"; |
| } |
| |
| @Override |
| public String[] getMethodsToCompileNames() { |
| return new String[] { getMethodWithLockName() }; |
| } |
| |
| public void forceAbort(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 < AbortProvoker.DEFAULT_ITERATIONS; i++) { |
| AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated); |
| t.forceAbort(i >= TestRTMDeoptOnLowAbortRatio.ABORT_THRESHOLD); |
| } |
| } |
| } |
| |
| public static void main(String args[]) throws Throwable { |
| new TestRTMDeoptOnLowAbortRatio().runTestCases(); |
| } |
| } |