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 RTMLockingThreshold affects rtm state transition 29 * ProfileRTM => UseRTM. 30 * @library /testlibrary /../../test/lib /compiler/testlibrary 31 * @build TestRTMLockingThreshold 32 * @run main ClassFileInstaller sun.hotspot.WhiteBox 33 * sun.hotspot.WhiteBox$WhiteBoxPermission 34 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 35 * -XX:+WhiteBoxAPI TestRTMLockingThreshold 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 RTMLockingThreshold option actually affects how soon 49 * method will be deoptimized on low abort ratio. 50 */ 51 public class TestRTMLockingThreshold extends CommandLineOptionTest { 52 private TestRTMLockingThreshold() { 53 super(new AndPredicate(new SupportedVM(), new SupportedCPU())); 54 } 55 56 /** 57 * We use non-zero abort threshold to avoid abort related to 58 * interrupts, VMM calls, etc. during first lock attempt. 59 * 60 */ 61 private static final int MIN_ABORT_THRESHOLD = 10; 62 63 @Override 64 protected void runTestCases() throws Throwable { 65 verifyLockingThreshold(0, false); 66 verifyLockingThreshold(100, false); 67 verifyLockingThreshold(1000, false); 68 69 verifyLockingThreshold(0, true); 70 verifyLockingThreshold(100, true); 71 verifyLockingThreshold(1000, true); 72 } 73 74 private void verifyLockingThreshold(int lockingThreshold, 75 boolean useStackLock) throws Throwable { 76 CompilableTest test = new Test(); 77 78 int abortThreshold = Math.max(lockingThreshold / 2, 79 TestRTMLockingThreshold.MIN_ABORT_THRESHOLD); 80 81 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest( 82 test, 83 "-XX:CompileThreshold=1", 84 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks", 85 useStackLock), 86 "-XX:+UseRTMDeopt", 87 "-XX:RTMTotalCountIncrRate=1", 88 "-XX:RTMRetryCount=0", 89 CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold", 90 abortThreshold), 91 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold", 92 lockingThreshold), 93 "-XX:RTMAbortRatio=100", 94 "-XX:+PrintPreciseRTMLockingStatistics", 95 Test.class.getName(), 96 Boolean.toString(!useStackLock), 97 Integer.toString(lockingThreshold) 98 ); 99 100 outputAnalyzer.shouldHaveExitValue(0); 101 102 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString( 103 test.getMethodWithLockName(), outputAnalyzer.getOutput()); 104 105 Asserts.assertEQ(statistics.size(), 2, "VM output should contain two " 106 + "RTM locking statistics entries."); 107 108 /** 109 * If RTMLockingThreshold==0, then we have to make at least 1 call. 110 */ 111 long expectedValue = lockingThreshold; 112 if (expectedValue == 0) { 113 expectedValue++; 114 } 115 116 RTMLockingStatistics statBeforeDeopt = null; 117 for (RTMLockingStatistics s : statistics) { 118 if (s.getTotalLocks() == expectedValue) { 119 Asserts.assertNull(statBeforeDeopt, 120 "Only one statistics entry should contain aborts"); 121 statBeforeDeopt = s; 122 } 123 } 124 125 Asserts.assertNotNull(statBeforeDeopt, "There should be exactly one " 126 + "statistics entry corresponding to ProfileRTM state."); 127 } 128 129 public static class Test implements CompilableTest { 130 // Following field have to be static in order to avoid escape analysis. 131 @SuppressWarnings("UnsuedDeclaration") 132 private static int field = 0; 133 private static final int TOTAL_ITERATIONS = 10000; 134 private static final Unsafe UNSAFE = Utils.getUnsafe(); 135 private final Object monitor = new Object(); 136 137 138 @Override 139 public String getMethodWithLockName() { 140 return this.getClass().getName() + "::lock"; 141 } 142 143 @Override 144 public String[] getMethodsToCompileNames() { 145 return new String[] { getMethodWithLockName() }; 146 } 147 148 public void lock(boolean abort) { 149 synchronized(monitor) { 150 if (abort) { 151 Test.field += 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, 2, "Two arguments required."); 162 Test t = new Test(); 163 boolean shouldBeInflated = Boolean.valueOf(args[0]); 164 int lockingThreshold = Integer.valueOf(args[1]); 165 if (shouldBeInflated) { 166 AbortProvoker.inflateMonitor(t.monitor); 167 } 168 for (int i = 0; i < Test.TOTAL_ITERATIONS; i++) { 169 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated); 170 t.lock(i >= lockingThreshold / 2); 171 } 172 } 173 } 174 175 public static void main(String args[]) throws Throwable { 176 new TestRTMLockingThreshold().test(); 177 } 178 }