| /* |
| * Copyright (c) 2014, 2015, 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 RTMSpinLoopCount affects time spent |
| * between locking attempts. |
| * @library /testlibrary /test/lib / |
| * @modules java.base/jdk.internal.misc |
| * java.management |
| * @build compiler.rtm.locking.TestRTMSpinLoopCount |
| * @run driver ClassFileInstaller sun.hotspot.WhiteBox |
| * sun.hotspot.WhiteBox$WhiteBoxPermission |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions |
| * -XX:+WhiteBoxAPI |
| * compiler.rtm.locking.TestRTMSpinLoopCount |
| */ |
| |
| package compiler.rtm.locking; |
| |
| import compiler.testlibrary.rtm.BusyLock; |
| import compiler.testlibrary.rtm.CompilableTest; |
| import compiler.testlibrary.rtm.RTMLockingStatistics; |
| import compiler.testlibrary.rtm.RTMTestBase; |
| import compiler.testlibrary.rtm.predicate.SupportedCPU; |
| import compiler.testlibrary.rtm.predicate.SupportedVM; |
| import jdk.test.lib.Asserts; |
| import jdk.test.lib.OutputAnalyzer; |
| import jdk.test.lib.cli.CommandLineOptionTest; |
| import jdk.test.lib.cli.predicate.AndPredicate; |
| |
| import java.util.List; |
| |
| /** |
| * Test verifies that RTMSpinLoopCount increase time spent between retries |
| * by comparing amount of retries done with different RTMSpinLoopCount's values. |
| */ |
| public class TestRTMSpinLoopCount extends CommandLineOptionTest { |
| private static final int LOCKING_TIME = 1000; |
| private static final int RTM_RETRY_COUNT = 1000; |
| private static final boolean INFLATE_MONITOR = true; |
| private static final long MAX_ABORTS = RTM_RETRY_COUNT + 1L; |
| private static final int[] SPIN_LOOP_COUNTS |
| = new int[] { 0, 100, 1_000, 1_000_000, 10_000_000 }; |
| |
| private TestRTMSpinLoopCount() { |
| super(new AndPredicate(new SupportedVM(), new SupportedCPU())); |
| } |
| |
| @Override |
| protected void runTestCases() throws Throwable { |
| long[] aborts = new long[TestRTMSpinLoopCount.SPIN_LOOP_COUNTS.length]; |
| for (int i = 0; i < TestRTMSpinLoopCount.SPIN_LOOP_COUNTS.length; i++) { |
| aborts[i] = getAbortsCountOnLockBusy( |
| TestRTMSpinLoopCount.SPIN_LOOP_COUNTS[i]); |
| } |
| |
| for (int i = 1; i < aborts.length; i++) { |
| Asserts.assertLTE(aborts[i], aborts[i - 1], "Increased spin loop " |
| + "count should not increase retries count."); |
| } |
| } |
| |
| private long getAbortsCountOnLockBusy(int spinLoopCount) throws Throwable { |
| CompilableTest test = new BusyLock(); |
| |
| OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest( |
| test, |
| CommandLineOptionTest.prepareNumericFlag("RTMRetryCount", |
| TestRTMSpinLoopCount.RTM_RETRY_COUNT), |
| CommandLineOptionTest.prepareNumericFlag("RTMSpinLoopCount", |
| spinLoopCount), |
| "-XX:-UseRTMXendForLockBusy", |
| "-XX:RTMTotalCountIncrRate=1", |
| "-XX:+PrintPreciseRTMLockingStatistics", |
| BusyLock.class.getName(), |
| Boolean.toString(TestRTMSpinLoopCount.INFLATE_MONITOR), |
| Integer.toString(TestRTMSpinLoopCount.LOCKING_TIME) |
| ); |
| |
| outputAnalyzer.shouldHaveExitValue(0); |
| |
| List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString( |
| test.getMethodWithLockName(), outputAnalyzer.getOutput()); |
| |
| Asserts.assertEQ(statistics.size(), 1, |
| "VM output should contain exactly one entry for method " |
| + test.getMethodWithLockName()); |
| |
| RTMLockingStatistics lock = statistics.get(0); |
| |
| Asserts.assertLTE(lock.getTotalAborts(), |
| TestRTMSpinLoopCount.MAX_ABORTS, String.format("Total aborts " |
| + "count (%d) should be less or equal to %d", |
| lock.getTotalAborts(), |
| TestRTMSpinLoopCount.MAX_ABORTS)); |
| |
| return lock.getTotalAborts(); |
| } |
| |
| public static void main(String args[]) throws Throwable { |
| new TestRTMSpinLoopCount().test(); |
| } |
| } |