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 on low abort ratio method will be recompiled. 29 * @library /test/lib / 30 * @modules java.base/jdk.internal.misc 31 * java.management 32 * @build sun.hotspot.WhiteBox 33 * @run driver ClassFileInstaller sun.hotspot.WhiteBox 34 * sun.hotspot.WhiteBox$WhiteBoxPermission 35 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 36 * -XX:+WhiteBoxAPI 37 * compiler.rtm.locking.TestRTMDeoptOnLowAbortRatio 38 */ 39 40 package compiler.rtm.locking; 41 42 import compiler.testlibrary.rtm.AbortProvoker; 43 import compiler.testlibrary.rtm.CompilableTest; 44 import compiler.testlibrary.rtm.RTMLockingStatistics; 45 import compiler.testlibrary.rtm.RTMTestBase; 46 import compiler.testlibrary.rtm.predicate.SupportedCPU; 47 import compiler.testlibrary.rtm.predicate.SupportedVM; 48 import jdk.internal.misc.Unsafe; 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 low abort ratio method will be deoptimized with 58 * <i>rtm_state_change</i> reason and will continue to use RTM-based lock 59 * elision after that. 60 * This test make asserts on total locks count done by compiled method, 61 * so in order to avoid issue with retriable locks -XX:RTMRetryCount=0 is used. 62 * For more details on that issue see {@link TestUseRTMAfterLockInflation}. 63 */ 64 public class TestRTMDeoptOnLowAbortRatio extends CommandLineOptionTest { 65 private static final long LOCKING_THRESHOLD = 100L; 66 private static final long ABORT_THRESHOLD = LOCKING_THRESHOLD / 2L; 67 68 private TestRTMDeoptOnLowAbortRatio() { 69 super(new AndPredicate(new SupportedCPU(), new SupportedVM())); 70 } 71 72 @Override 73 protected void runTestCases() throws Throwable { 74 verifyRTMDeopt(false); 75 verifyRTMDeopt(true); 76 } 77 78 private void verifyRTMDeopt(boolean useStackLock) throws Throwable { 79 CompilableTest test = new Test(); 80 String logFileName = String.format("rtm_deopt_%s_stack_lock.xml", 81 useStackLock ? "use" : "no"); 82 83 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest( 84 logFileName, 85 test, 86 "-XX:+UseRTMDeopt", 87 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks", 88 useStackLock), 89 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold", 90 TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD), 91 CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold", 92 TestRTMDeoptOnLowAbortRatio.ABORT_THRESHOLD), 93 "-XX:RTMAbortRatio=100", 94 "-XX:CompileThreshold=1", 95 "-XX:RTMRetryCount=0", 96 "-XX:RTMTotalCountIncrRate=1", 97 "-XX:+PrintPreciseRTMLockingStatistics", 98 Test.class.getName(), 99 Boolean.toString(!useStackLock) 100 ); 101 102 outputAnalyzer.shouldHaveExitValue(0); 103 104 int firedTraps = RTMTestBase.firedRTMStateChangeTraps(logFileName); 105 106 Asserts.assertEQ(firedTraps, 1, 107 "Expected to get only one deoptimization due to rtm" 108 + " state change"); 109 110 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString( 111 test.getMethodWithLockName(), outputAnalyzer.getOutput()); 112 113 Asserts.assertEQ(statistics.size(), 2, 114 "VM output should contain two RTM locking " 115 + "statistics entries for method " 116 + test.getMethodWithLockName()); 117 118 RTMLockingStatistics statisticsBeforeDeopt = null; 119 120 for (RTMLockingStatistics s : statistics) { 121 if (s.getTotalLocks() 122 == TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD) { 123 Asserts.assertNull(statisticsBeforeDeopt, 124 "Only one abort was expected during test run"); 125 statisticsBeforeDeopt = s; 126 } 127 } 128 129 Asserts.assertNotNull(statisticsBeforeDeopt, 130 "After LockThreshold was reached, method should be recompiled " 131 + "with rtm lock eliding."); 132 } 133 134 public static class Test implements CompilableTest { 135 private static final Unsafe UNSAFE = Unsafe.getUnsafe(); 136 private final Object monitor = new Object(); 137 138 @Override 139 public String getMethodWithLockName() { 140 return this.getClass().getName() + "::forceAbort"; 141 } 142 143 @Override 144 public String[] getMethodsToCompileNames() { 145 return new String[] { getMethodWithLockName() }; 146 } 147 148 public void forceAbort(boolean abort) { 149 synchronized(monitor) { 150 if (abort) { 151 Test.UNSAFE.addressSize(); 152 } 153 } 154 } 155 156 /** 157 * Usage: 158 * Test <inflate monitor> 159 */ 160 public static void main(String args[]) throws Throwable { 161 Asserts.assertGTE(args.length, 1, "One argument required."); 162 Test t = new Test(); 163 boolean shouldBeInflated = Boolean.valueOf(args[0]); 164 if (shouldBeInflated) { 165 AbortProvoker.inflateMonitor(t.monitor); 166 } 167 for (int i = 0; i < AbortProvoker.DEFAULT_ITERATIONS; i++) { 168 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated); 169 t.forceAbort(i >= TestRTMDeoptOnLowAbortRatio.ABORT_THRESHOLD); 170 } 171 } 172 } 173 174 public static void main(String args[]) throws Throwable { 175 new TestRTMDeoptOnLowAbortRatio().test(); 176 } 177 }