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 on low abort ratio method will be recompiled. 29 * @library /testlibrary /testlibrary/whitebox /compiler/testlibrary 30 * @build TestRTMDeoptOnLowAbortRatio 31 * @run main ClassFileInstaller sun.hotspot.WhiteBox 32 * sun.hotspot.WhiteBox$WhiteBoxPermission 33 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 34 * -XX:+WhiteBoxAPI TestRTMDeoptOnLowAbortRatio 35 */ 36 37 import java.util.List; 38 import com.oracle.java.testlibrary.*; 39 import com.oracle.java.testlibrary.cli.CommandLineOptionTest; 40 import com.oracle.java.testlibrary.cli.predicate.AndPredicate; 41 import rtm.*; 42 import rtm.predicate.SupportedCPU; 43 import rtm.predicate.SupportedVM; 44 import sun.misc.Unsafe; 45 46 /** 47 * Test verifies that low abort ratio method will be deoptimized with 48 * <i>rtm_state_change</i> reason and will continue to use RTM-based lock 49 * elision after that. 50 * This test make asserts on total locks count done by compiled method, 51 * so in order to avoid issue with retriable locks -XX:RTMRetryCount=0 is used. 52 * For more details on that issue see {@link TestUseRTMAfterLockInflation}. 53 */ 54 public class TestRTMDeoptOnLowAbortRatio extends CommandLineOptionTest { 55 private static final long LOCKING_THRESHOLD = 100L; 56 57 private TestRTMDeoptOnLowAbortRatio() { 58 super(new AndPredicate(new SupportedCPU(), new SupportedVM())); 59 } 60 61 @Override 62 protected void runTestCases() throws Throwable { 63 verifyRTMDeopt(false); 64 verifyRTMDeopt(true); 65 } 66 67 private void verifyRTMDeopt(boolean useStackLock) throws Throwable { 68 CompilableTest test = new Test(); 69 String logFileName = String.format("rtm_deopt_%s_stack_lock.xml", 70 useStackLock ? "use" : "no"); 71 72 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest( 73 logFileName, 74 test, 75 "-XX:+UseRTMDeopt", 76 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks", 77 useStackLock), 78 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold", 79 TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD), 80 "-XX:RTMAbortThreshold=1", 81 "-XX:RTMAbortRatio=100", 82 "-XX:CompileThreshold=1", 83 "-XX:RTMRetryCount=0", 84 "-XX:RTMTotalCountIncrRate=1", 85 "-XX:+PrintPreciseRTMLockingStatistics", 86 Test.class.getName(), 87 Boolean.toString(!useStackLock) 88 ); 89 90 outputAnalyzer.shouldHaveExitValue(0); 91 92 int firedTraps = RTMTestBase.firedRTMStateChangeTraps(logFileName); 93 94 Asserts.assertEQ(firedTraps, 1, 95 "Expected to get only one deoptimization due to rtm" 96 + " state change"); 97 98 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString( 99 test.getMethodWithLockName(), outputAnalyzer.getOutput()); 100 101 Asserts.assertEQ(statistics.size(), 2, 102 "VM output should contain two RTM locking " 103 + "statistics entries for method " 104 + test.getMethodWithLockName()); 105 106 RTMLockingStatistics statisticsBeforeDeopt = null; 107 108 for (RTMLockingStatistics s : statistics) { 109 if (s.getTotalLocks() 110 == TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD + 1L) { 111 Asserts.assertNull(statisticsBeforeDeopt, 112 "Only one abort was expected during test run"); 113 statisticsBeforeDeopt = s; 114 } 115 } 116 117 Asserts.assertNotNull(statisticsBeforeDeopt, 118 "After LockThreshold was reached, method should be recompiled " 119 + "with rtm lock eliding."); 120 } 121 122 public static class Test implements CompilableTest { 123 private static final Unsafe UNSAFE = Utils.getUnsafe(); 124 private final Object monitor = new Object(); 125 126 @Override 127 public String getMethodWithLockName() { 128 return this.getClass().getName() + "::forceAbort"; 129 } 130 131 @Override 132 public String[] getMethodsToCompileNames() { 133 return new String[] { 134 getMethodWithLockName(), 135 sun.misc.Unsafe.class.getName() + "::addressSize" 136 }; 137 } 138 139 public void forceAbort(boolean abort) { 140 synchronized(monitor) { 141 if (abort) { 142 Test.UNSAFE.addressSize(); 143 } 144 } 145 } 146 147 /** 148 * Usage: 149 * Test <inflate monitor> 150 */ 151 public static void main(String args[]) throws Throwable { 152 Asserts.assertGTE(args.length, 1, "One argument required."); 153 Test t = new Test(); 154 155 if (Boolean.valueOf(args[0])) { 156 AbortProvoker.inflateMonitor(t.monitor); 157 } 158 for (int i = 0; i < AbortProvoker.DEFAULT_ITERATIONS; i++) { 159 t.forceAbort( 160 i == TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD); 161 } 162 } 163 } 164 165 public static void main(String args[]) throws Throwable { 166 new TestRTMDeoptOnLowAbortRatio().test(); 167 } 168 }