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