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 RTMAbortRatio affects amount of aborts before 29 * deoptimization. 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.TestRTMAbortRatio 39 */ 40 41 package compiler.rtm.locking; 42 43 import compiler.testlibrary.rtm.AbortProvoker; 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.internal.misc.Unsafe; 50 import jdk.test.lib.Asserts; 51 import jdk.test.lib.process.OutputAnalyzer; 52 import jdk.test.lib.cli.CommandLineOptionTest; 53 import jdk.test.lib.cli.predicate.AndPredicate; 54 55 import java.util.List; 56 57 /** 58 * Test verifies that method will be deoptimized on high abort ratio 59 * as soon as abort ratio reaches RTMAbortRatio's value. 60 */ 61 public class TestRTMAbortRatio extends CommandLineOptionTest { 62 private TestRTMAbortRatio() { 63 super(new AndPredicate(new SupportedCPU(), new SupportedVM())); 64 } 65 66 @Override 67 protected void runTestCases() throws Throwable { 68 verifyAbortRatio(0, false); 69 verifyAbortRatio(10, false); 70 verifyAbortRatio(50, false); 71 verifyAbortRatio(100, false); 72 73 verifyAbortRatio(0, true); 74 verifyAbortRatio(10, true); 75 verifyAbortRatio(50, true); 76 verifyAbortRatio(100, true); 77 } 78 79 private void verifyAbortRatio(int abortRatio, boolean useStackLock) 80 throws Throwable { 81 CompilableTest test = new Test(); 82 83 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest( 84 test, 85 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks", 86 useStackLock), 87 "-XX:+UseRTMDeopt", 88 "-XX:RTMTotalCountIncrRate=1", 89 "-XX:RTMAbortThreshold=0", 90 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold", 91 10 * Test.TOTAL_ITERATIONS), 92 CommandLineOptionTest.prepareNumericFlag("RTMAbortRatio", 93 abortRatio), 94 "-XX:+PrintPreciseRTMLockingStatistics", 95 test.getClass().getName(), 96 Boolean.toString(!useStackLock)); 97 98 outputAnalyzer.shouldHaveExitValue(0); 99 100 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString( 101 test.getMethodWithLockName(), outputAnalyzer.getOutput()); 102 103 Asserts.assertEQ(statistics.size(), 1, "VM output should contain " 104 + "exactly one RTM locking statistics entry."); 105 106 RTMLockingStatistics lock = statistics.get(0); 107 int actualRatio; 108 109 if (lock.getTotalAborts() == 1L) { 110 actualRatio = 0; 111 } else { 112 actualRatio = (int) (lock.getTotalLocks() 113 / (lock.getTotalAborts() - 1L)); 114 } 115 116 Asserts.assertLTE(actualRatio, abortRatio, String.format( 117 "Actual abort ratio (%d) should lower or equal to " 118 + "specified (%d).", actualRatio, abortRatio)); 119 } 120 121 /** 122 * Force abort after {@code Test.WARMUP_ITERATIONS} is done. 123 */ 124 public static class Test implements CompilableTest { 125 private static final int TOTAL_ITERATIONS = 10000; 126 private static final int WARMUP_ITERATIONS = 1000; 127 private static final Unsafe UNSAFE = Unsafe.getUnsafe(); 128 private final Object monitor = new Object(); 129 // Following field have to be static in order to avoid escape analysis. 130 @SuppressWarnings("UnsuedDeclaration") 131 private static int field = 0; 132 133 @Override 134 public String getMethodWithLockName() { 135 return this.getClass().getName() + "::lock"; 136 } 137 138 @Override 139 public String[] getMethodsToCompileNames() { 140 return new String[] { getMethodWithLockName() }; 141 } 142 143 public void lock(boolean abort) { 144 synchronized(monitor) { 145 if (abort) { 146 Test.UNSAFE.addressSize(); 147 } 148 } 149 } 150 151 /** 152 * Usage: 153 * Test <inflate monitor> 154 */ 155 public static void main(String args[]) throws Throwable { 156 Asserts.assertGTE(args.length, 1, "One argument required."); 157 Test t = new Test(); 158 boolean shouldBeInflated = Boolean.valueOf(args[0]); 159 if (shouldBeInflated) { 160 AbortProvoker.inflateMonitor(t.monitor); 161 } 162 for (int i = 0; i < Test.TOTAL_ITERATIONS; i++) { 163 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated); 164 t.lock(i >= Test.WARMUP_ITERATIONS); 165 } 166 } 167 } 168 169 public static void main(String args[]) throws Throwable { 170 new TestRTMAbortRatio().test(); 171 } 172 } 173