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 /../../test/lib /compiler/testlibrary 30 * @build com.oracle.java.testlibrary.* 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 private static final long ABORT_THRESHOLD = LOCKING_THRESHOLD / 2L; 57 58 private TestRTMDeoptOnLowAbortRatio() { 59 super(new AndPredicate(new SupportedCPU(), new SupportedVM())); 60 } 61 62 @Override 63 protected void runTestCases() throws Throwable { 64 verifyRTMDeopt(false); 65 verifyRTMDeopt(true); 66 } 67 68 private void verifyRTMDeopt(boolean useStackLock) throws Throwable { 69 CompilableTest test = new Test(); 70 String logFileName = String.format("rtm_deopt_%s_stack_lock.xml", 71 useStackLock ? "use" : "no"); 72 73 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest( 74 logFileName, 75 test, 76 "-XX:+UseRTMDeopt", 77 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks", 78 useStackLock), 79 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold", 80 TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD), 81 CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold", 82 TestRTMDeoptOnLowAbortRatio.ABORT_THRESHOLD), 83 "-XX:RTMAbortRatio=100", 84 "-XX:CompileThreshold=1", 85 "-XX:RTMRetryCount=0", 86 "-XX:RTMTotalCountIncrRate=1", 87 "-XX:+PrintPreciseRTMLockingStatistics", 88 Test.class.getName(), 89 Boolean.toString(!useStackLock) 90 ); 91 92 outputAnalyzer.shouldHaveExitValue(0); 93 94 int firedTraps = RTMTestBase.firedRTMStateChangeTraps(logFileName); 95 96 Asserts.assertEQ(firedTraps, 1, 97 "Expected to get only one deoptimization due to rtm" 98 + " state change"); 99 100 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString( 101 test.getMethodWithLockName(), outputAnalyzer.getOutput()); 102 103 Asserts.assertEQ(statistics.size(), 2, 104 "VM output should contain two RTM locking " 105 + "statistics entries for method " 106 + test.getMethodWithLockName()); 107 108 RTMLockingStatistics statisticsBeforeDeopt = null; 109 110 for (RTMLockingStatistics s : statistics) { 111 if (s.getTotalLocks() 112 == TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD) { 113 Asserts.assertNull(statisticsBeforeDeopt, 114 "Only one abort was expected during test run"); 115 statisticsBeforeDeopt = s; 116 } 117 } 118 119 Asserts.assertNotNull(statisticsBeforeDeopt, 120 "After LockThreshold was reached, method should be recompiled " 121 + "with rtm lock eliding."); 122 } 123 124 public static class Test implements CompilableTest { 125 private static final Unsafe UNSAFE = Utils.getUnsafe(); 126 private final Object monitor = new Object(); 127 128 @Override 129 public String getMethodWithLockName() { 130 return this.getClass().getName() + "::forceAbort"; 131 } 132 133 @Override 134 public String[] getMethodsToCompileNames() { 135 return new String[] { getMethodWithLockName() }; 136 } 137 138 public void forceAbort(boolean abort) { 139 synchronized(monitor) { 140 if (abort) { 141 Test.UNSAFE.addressSize(); 142 } 143 } 144 } 145 146 /** 147 * Usage: 148 * Test <inflate monitor> 149 */ 150 public static void main(String args[]) throws Throwable { 151 Asserts.assertGTE(args.length, 1, "One argument required."); 152 Test t = new Test(); 153 boolean shouldBeInflated = Boolean.valueOf(args[0]); 154 if (shouldBeInflated) { 155 AbortProvoker.inflateMonitor(t.monitor); 156 } 157 for (int i = 0; i < AbortProvoker.DEFAULT_ITERATIONS; i++) { 158 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated); 159 t.forceAbort(i >= TestRTMDeoptOnLowAbortRatio.ABORT_THRESHOLD); 160 } 161 } 162 } 163 164 public static void main(String args[]) throws Throwable { 165 new TestRTMDeoptOnLowAbortRatio().test(); 166 } 167 }