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.unsafe.UnsafeHelper; 53 import jdk.test.lib.cli.CommandLineOptionTest; 54 import jdk.test.lib.cli.predicate.AndPredicate; 55 56 import java.util.List; 57 58 /** 59 * Test verifies that method will be deoptimized on high abort ratio 60 * as soon as abort ratio reaches RTMAbortRatio's value. 61 */ 62 public class TestRTMAbortRatio extends CommandLineOptionTest { 63 private TestRTMAbortRatio() { 64 super(new AndPredicate(new SupportedCPU(), new SupportedVM())); 65 } 66 67 @Override 68 protected void runTestCases() throws Throwable { 69 verifyAbortRatio(0, false); 70 verifyAbortRatio(10, false); 71 verifyAbortRatio(50, false); 72 verifyAbortRatio(100, false); 73 74 verifyAbortRatio(0, true); 75 verifyAbortRatio(10, true); 76 verifyAbortRatio(50, true); 77 verifyAbortRatio(100, true); 78 } 79 80 private void verifyAbortRatio(int abortRatio, boolean useStackLock) 81 throws Throwable { 82 CompilableTest test = new Test(); 83 84 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest( 85 test, 86 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks", 87 useStackLock), 88 "-XX:+UseRTMDeopt", 89 "-XX:RTMTotalCountIncrRate=1", 90 "-XX:RTMAbortThreshold=0", 91 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold", 92 10 * Test.TOTAL_ITERATIONS), 93 CommandLineOptionTest.prepareNumericFlag("RTMAbortRatio", 94 abortRatio), 95 "-XX:+PrintPreciseRTMLockingStatistics", 96 test.getClass().getName(), 97 Boolean.toString(!useStackLock)); 98 99 outputAnalyzer.shouldHaveExitValue(0); 100 101 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString( 102 test.getMethodWithLockName(), outputAnalyzer.getOutput()); 103 104 Asserts.assertEQ(statistics.size(), 1, "VM output should contain " 105 + "exactly one RTM locking statistics entry."); 106 107 RTMLockingStatistics lock = statistics.get(0); 108 int actualRatio; 109 110 if (lock.getTotalAborts() == 1L) { 111 actualRatio = 0; 112 } else { 113 actualRatio = (int) (lock.getTotalLocks() 114 / (lock.getTotalAborts() - 1L)); 115 } 116 117 Asserts.assertLTE(actualRatio, abortRatio, String.format( 118 "Actual abort ratio (%d) should lower or equal to " 119 + "specified (%d).", actualRatio, abortRatio)); 120 } 121 122 /** 123 * Force abort after {@code Test.WARMUP_ITERATIONS} is done. 124 */ 125 public static class Test implements CompilableTest { 126 private static final int TOTAL_ITERATIONS = 10000; 127 private static final int WARMUP_ITERATIONS = 1000; 128 private static final Unsafe UNSAFE = UnsafeHelper.getUnsafe(); 129 private final Object monitor = new Object(); 130 // Following field have to be static in order to avoid escape analysis. 131 @SuppressWarnings("UnsuedDeclaration") 132 private static int field = 0; 133 134 @Override 135 public String getMethodWithLockName() { 136 return this.getClass().getName() + "::lock"; 137 } 138 139 @Override 140 public String[] getMethodsToCompileNames() { 141 return new String[] { getMethodWithLockName() }; 142 } 143 144 public void lock(boolean abort) { 145 synchronized(monitor) { 146 if (abort) { 147 Test.UNSAFE.addressSize(); 148 } 149 } 150 } 151 152 /** 153 * Usage: 154 * Test <inflate monitor> 155 */ 156 public static void main(String args[]) throws Throwable { 157 Asserts.assertGTE(args.length, 1, "One argument required."); 158 Test t = new Test(); 159 boolean shouldBeInflated = Boolean.valueOf(args[0]); 160 if (shouldBeInflated) { 161 AbortProvoker.inflateMonitor(t.monitor); 162 } 163 for (int i = 0; i < Test.TOTAL_ITERATIONS; i++) { 164 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated); 165 t.lock(i >= Test.WARMUP_ITERATIONS); 166 } 167 } 168 } 169 170 public static void main(String args[]) throws Throwable { 171 new TestRTMAbortRatio().test(); 172 } 173 } 174