1 /* 2 * Copyright (c) 2014, 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 /testlibrary /../../test/lib /compiler/testlibrary 31 * @build com.oracle.java.testlibrary.* TestRTMAbortRatio 32 * @run main ClassFileInstaller sun.hotspot.WhiteBox 33 * sun.hotspot.WhiteBox$WhiteBoxPermission 34 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 35 * -XX:+WhiteBoxAPI TestRTMAbortRatio 36 */ 37 38 import java.util.List; 39 import com.oracle.java.testlibrary.*; 40 import com.oracle.java.testlibrary.cli.CommandLineOptionTest; 41 import com.oracle.java.testlibrary.cli.predicate.AndPredicate; 42 import rtm.*; 43 import rtm.predicate.SupportedCPU; 44 import rtm.predicate.SupportedVM; 45 import sun.misc.Unsafe; 46 47 /** 48 * Test verifies that method will be deoptimized on high abort ratio 49 * as soon as abort ratio reaches RTMAbortRatio's value. 50 */ 51 public class TestRTMAbortRatio extends CommandLineOptionTest { 52 private TestRTMAbortRatio() { 53 super(new AndPredicate(new SupportedCPU(), new SupportedVM())); 54 } 55 56 @Override 57 protected void runTestCases() throws Throwable { 58 verifyAbortRatio(0, false); 59 verifyAbortRatio(10, false); 60 verifyAbortRatio(50, false); 61 verifyAbortRatio(100, false); 62 63 verifyAbortRatio(0, true); 64 verifyAbortRatio(10, true); 65 verifyAbortRatio(50, true); 66 verifyAbortRatio(100, true); 67 } 68 69 private void verifyAbortRatio(int abortRatio, boolean useStackLock) 70 throws Throwable { 71 CompilableTest test = new Test(); 72 73 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest( 74 test, 75 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks", 76 useStackLock), 77 "-XX:+UseRTMDeopt", 78 "-XX:RTMTotalCountIncrRate=1", 79 "-XX:RTMAbortThreshold=0", 80 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold", 81 10 * Test.TOTAL_ITERATIONS), 82 CommandLineOptionTest.prepareNumericFlag("RTMAbortRatio", 83 abortRatio), 84 "-XX:+PrintPreciseRTMLockingStatistics", 85 test.getClass().getName(), 86 Boolean.toString(!useStackLock)); 87 88 outputAnalyzer.shouldHaveExitValue(0); 89 90 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString( 91 test.getMethodWithLockName(), outputAnalyzer.getOutput()); 92 93 Asserts.assertEQ(statistics.size(), 1, "VM output should contain " 94 + "exactly one RTM locking statistics entry."); 95 96 RTMLockingStatistics lock = statistics.get(0); 97 int actualRatio; 98 99 if (lock.getTotalAborts() == 1L) { 100 actualRatio = 0; 101 } else { 102 actualRatio = (int) (lock.getTotalLocks() 103 / (lock.getTotalAborts() - 1L)); 104 } 105 106 Asserts.assertLTE(actualRatio, abortRatio, String.format( 107 "Actual abort ratio (%d) should lower or equal to " 108 + "specified (%d).", actualRatio, abortRatio)); 109 } 110 111 /** 112 * Force abort after {@code Test.WARMUP_ITERATIONS} is done. 113 */ 114 public static class Test implements CompilableTest { 115 private static final int TOTAL_ITERATIONS = 10000; 116 private static final int WARMUP_ITERATIONS = 1000; 117 private static final Unsafe UNSAFE = Utils.getUnsafe(); 118 private final Object monitor = new Object(); 119 // Following field have to be static in order to avoid escape analysis. 120 @SuppressWarnings("UnsuedDeclaration") 121 private static int field = 0; 122 123 @Override 124 public String getMethodWithLockName() { 125 return this.getClass().getName() + "::lock"; 126 } 127 128 @Override 129 public String[] getMethodsToCompileNames() { 130 return new String[] { getMethodWithLockName() }; 131 } 132 133 public void lock(boolean abort) { 134 synchronized(monitor) { 135 if (abort) { 136 Test.UNSAFE.addressSize(); 137 } 138 } 139 } 140 141 /** 142 * Usage: 143 * Test <inflate monitor> 144 */ 145 public static void main(String args[]) throws Throwable { 146 Asserts.assertGTE(args.length, 1, "One argument required."); 147 Test t = new Test(); 148 boolean shouldBeInflated = Boolean.valueOf(args[0]); 149 if (shouldBeInflated) { 150 AbortProvoker.inflateMonitor(t.monitor); 151 } 152 for (int i = 0; i < Test.TOTAL_ITERATIONS; i++) { 153 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated); 154 t.lock(i >= Test.WARMUP_ITERATIONS); 155 } 156 } 157 } 158 159 public static void main(String args[]) throws Throwable { 160 new TestRTMAbortRatio().test(); 161 } 162 } 163