1 /* 2 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 /** 26 * @test 27 * @bug 8031320 28 * @summary Verify that RTMRetryCount affects actual amount of retries. 29 * @library /testlibrary /test/lib /compiler/testlibrary 30 * @modules java.base/sun.misc 31 * java.management 32 * @build TestRTMRetryCount 33 * @run main ClassFileInstaller sun.hotspot.WhiteBox 34 * sun.hotspot.WhiteBox$WhiteBoxPermission 35 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 36 * -XX:+WhiteBoxAPI TestRTMRetryCount 37 */ 38 39 import java.util.List; 40 41 import jdk.test.lib.*; 42 import jdk.test.lib.cli.CommandLineOptionTest; 43 import jdk.test.lib.cli.predicate.AndPredicate; 44 import rtm.*; 45 import rtm.predicate.SupportedCPU; 46 import rtm.predicate.SupportedVM; 47 48 /** 49 * Test verifies that RTMRetryCount option actually affects amount of 50 * retries on lock busy. 51 */ 52 public class TestRTMRetryCount extends CommandLineOptionTest { 53 /** 54 * Time in ms, during which busy lock will be locked. 55 */ 56 private static final int LOCKING_TIME = 5000; 57 private static final boolean INFLATE_MONITOR = true; 58 59 private TestRTMRetryCount() { 60 super(new AndPredicate(new SupportedCPU(), new SupportedVM())); 61 } 62 63 @Override 64 protected void runTestCases() throws Throwable { 65 verifyRTMRetryCount(0); 66 verifyRTMRetryCount(1); 67 verifyRTMRetryCount(5); 68 verifyRTMRetryCount(10); 69 } 70 71 private void verifyRTMRetryCount(int retryCount) throws Throwable { 72 CompilableTest busyLock = new BusyLock(); 73 long expectedAborts = retryCount + 1L; 74 75 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest( 76 busyLock, 77 "-XX:-UseRTMXendForLockBusy", 78 "-XX:RTMTotalCountIncrRate=1", 79 CommandLineOptionTest.prepareNumericFlag("RTMRetryCount", 80 retryCount), 81 "-XX:RTMTotalCountIncrRate=1", 82 "-XX:+PrintPreciseRTMLockingStatistics", 83 BusyLock.class.getName(), 84 Boolean.toString(TestRTMRetryCount.INFLATE_MONITOR), 85 Integer.toString(TestRTMRetryCount.LOCKING_TIME) 86 ); 87 88 outputAnalyzer.shouldHaveExitValue(0); 89 90 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString( 91 busyLock.getMethodWithLockName(), outputAnalyzer.getStdout()); 92 93 Asserts.assertEQ(statistics.size(), 1, "VM output should contain " 94 + "exactly one rtm locking statistics entry for method " 95 + busyLock.getMethodWithLockName()); 96 97 Asserts.assertEQ(statistics.get(0).getTotalAborts(), expectedAborts, 98 String.format("It is expected to get %d aborts", 99 expectedAborts)); 100 } 101 102 public static void main(String args[]) throws Throwable { 103 new TestRTMRetryCount().test(); 104 } 105 }