1 /* 2 * Copyright (c) 2014, 2016, 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 RTMSpinLoopCount affects time spent 29 * between locking attempts. 30 * @library /test/lib / 31 * @modules java.base/jdk.internal.misc 32 * java.management 33 * @build sun.hotspot.WhiteBox 34 * @run driver ClassFileInstaller sun.hotspot.WhiteBox 35 * sun.hotspot.WhiteBox$WhiteBoxPermission 36 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 37 * -XX:+WhiteBoxAPI 38 * compiler.rtm.locking.TestRTMSpinLoopCount 39 */ 40 41 package compiler.rtm.locking; 42 43 import compiler.testlibrary.rtm.BusyLock; 44 import compiler.testlibrary.rtm.CompilableTest; 45 import compiler.testlibrary.rtm.RTMLockingStatistics; 46 import compiler.testlibrary.rtm.RTMTestBase; 47 import compiler.testlibrary.rtm.predicate.SupportedCPU; 48 import compiler.testlibrary.rtm.predicate.SupportedVM; 49 import jdk.test.lib.Asserts; 50 import jdk.test.lib.process.OutputAnalyzer; 51 import jdk.test.lib.cli.CommandLineOptionTest; 52 import jdk.test.lib.cli.predicate.AndPredicate; 53 54 import java.util.List; 55 56 /** 57 * Test verifies that RTMSpinLoopCount increase time spent between retries 58 * by comparing amount of retries done with different RTMSpinLoopCount's values. 59 */ 60 public class TestRTMSpinLoopCount extends CommandLineOptionTest { 61 private static final int LOCKING_TIME = 1000; 62 private static final int RTM_RETRY_COUNT = 1000; 63 private static final boolean INFLATE_MONITOR = true; 64 private static final long MAX_ABORTS = RTM_RETRY_COUNT + 1L; 65 private static final int[] SPIN_LOOP_COUNTS 66 = new int[] { 0, 100, 1_000, 1_000_000, 10_000_000 }; 67 68 private TestRTMSpinLoopCount() { 69 super(new AndPredicate(new SupportedVM(), new SupportedCPU())); 70 } 71 72 @Override 73 protected void runTestCases() throws Throwable { 74 long[] aborts = new long[TestRTMSpinLoopCount.SPIN_LOOP_COUNTS.length]; 75 for (int i = 0; i < TestRTMSpinLoopCount.SPIN_LOOP_COUNTS.length; i++) { 76 aborts[i] = getAbortsCountOnLockBusy( 77 TestRTMSpinLoopCount.SPIN_LOOP_COUNTS[i]); 78 } 79 80 for (int i = 1; i < aborts.length; i++) { 81 Asserts.assertLTE(aborts[i], aborts[i - 1], "Increased spin loop " 82 + "count should not increase retries count."); 83 } 84 } 85 86 private long getAbortsCountOnLockBusy(int spinLoopCount) throws Throwable { 87 CompilableTest test = new BusyLock(); 88 89 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest( 90 test, 91 CommandLineOptionTest.prepareNumericFlag("RTMRetryCount", 92 TestRTMSpinLoopCount.RTM_RETRY_COUNT), 93 CommandLineOptionTest.prepareNumericFlag("RTMSpinLoopCount", 94 spinLoopCount), 95 "-XX:-UseRTMXendForLockBusy", 96 "-XX:RTMTotalCountIncrRate=1", 97 "-XX:+PrintPreciseRTMLockingStatistics", 98 BusyLock.class.getName(), 99 Boolean.toString(TestRTMSpinLoopCount.INFLATE_MONITOR), 100 Integer.toString(TestRTMSpinLoopCount.LOCKING_TIME) 101 ); 102 103 outputAnalyzer.shouldHaveExitValue(0); 104 105 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString( 106 test.getMethodWithLockName(), outputAnalyzer.getOutput()); 107 108 Asserts.assertEQ(statistics.size(), 1, 109 "VM output should contain exactly one entry for method " 110 + test.getMethodWithLockName()); 111 112 RTMLockingStatistics lock = statistics.get(0); 113 114 Asserts.assertLTE(lock.getTotalAborts(), 115 TestRTMSpinLoopCount.MAX_ABORTS, String.format("Total aborts " 116 + "count (%d) should be less or equal to %d", 117 lock.getTotalAborts(), 118 TestRTMSpinLoopCount.MAX_ABORTS)); 119 120 return lock.getTotalAborts(); 121 } 122 123 public static void main(String args[]) throws Throwable { 124 new TestRTMSpinLoopCount().test(); 125 } 126 }