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 RTMAbortRatio affects amount of aborts before
29 * deoptimization.
30 * @library /test/lib /
31 * @modules java.base/jdk.internal.misc
32 * java.management
33 * @build sun.hotspot.WhiteBox
34 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
35 * sun.hotspot.WhiteBox$WhiteBoxPermission
36 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
37 * -XX:+WhiteBoxAPI
38 * compiler.rtm.locking.TestRTMAbortRatio
39 */
40
41 package compiler.rtm.locking;
42
43 import compiler.testlibrary.rtm.AbortProvoker;
44 import compiler.testlibrary.rtm.CompilableTest;
45 import compiler.testlibrary.rtm.RTMLockingStatistics;
46 import compiler.testlibrary.rtm.RTMTestBase;
47 import compiler.testlibrary.rtm.predicate.SupportedCPU;
48 import compiler.testlibrary.rtm.predicate.SupportedOS;
49 import compiler.testlibrary.rtm.predicate.SupportedVM;
50 import jdk.internal.misc.Unsafe;
51 import jdk.test.lib.Asserts;
52 import jdk.test.lib.process.OutputAnalyzer;
53 import jdk.test.lib.unsafe.UnsafeHelper;
54 import jdk.test.lib.cli.CommandLineOptionTest;
55 import jdk.test.lib.cli.predicate.AndPredicate;
56
57 import java.util.List;
58
59 /**
60 * Test verifies that method will be deoptimized on high abort ratio
61 * as soon as abort ratio reaches RTMAbortRatio's value.
62 */
63 public class TestRTMAbortRatio extends CommandLineOptionTest {
64 private TestRTMAbortRatio() {
65 super(new AndPredicate(new SupportedCPU(), new SupportedOS(), new SupportedVM()));
66 }
67
68 @Override
69 protected void runTestCases() throws Throwable {
70 verifyAbortRatio(0, false);
71 verifyAbortRatio(10, false);
72 verifyAbortRatio(50, false);
73 verifyAbortRatio(100, false);
74
75 verifyAbortRatio(0, true);
76 verifyAbortRatio(10, true);
77 verifyAbortRatio(50, true);
78 verifyAbortRatio(100, true);
79 }
80
81 private void verifyAbortRatio(int abortRatio, boolean useStackLock)
82 throws Throwable {
83 CompilableTest test = new Test();
84
85 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
86 test,
87 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
88 useStackLock),
89 "-XX:+UseRTMDeopt",
90 "-XX:RTMTotalCountIncrRate=1",
91 "-XX:RTMAbortThreshold=0",
92 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",
93 10 * Test.TOTAL_ITERATIONS),
94 CommandLineOptionTest.prepareNumericFlag("RTMAbortRatio",
95 abortRatio),
96 "-XX:+PrintPreciseRTMLockingStatistics",
97 test.getClass().getName(),
98 Boolean.toString(!useStackLock));
99
100 outputAnalyzer.shouldHaveExitValue(0);
101
102 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
103 test.getMethodWithLockName(), outputAnalyzer.getOutput());
104
105 Asserts.assertEQ(statistics.size(), 1, "VM output should contain "
106 + "exactly one RTM locking statistics entry.");
107
108 RTMLockingStatistics lock = statistics.get(0);
109 int actualRatio;
110
111 if (lock.getTotalAborts() == 1L) {
112 actualRatio = 0;
113 } else {
114 actualRatio = (int) (lock.getTotalLocks()
115 / (lock.getTotalAborts() - 1L));
116 }
117
118 Asserts.assertLTE(actualRatio, abortRatio, String.format(
119 "Actual abort ratio (%d) should lower or equal to "
120 + "specified (%d).", actualRatio, abortRatio));
121 }
122
123 /**
124 * Force abort after {@code Test.WARMUP_ITERATIONS} is done.
125 */
126 public static class Test implements CompilableTest {
127 private static final int TOTAL_ITERATIONS = 10000;
128 private static final int WARMUP_ITERATIONS = 1000;
129 private static final Unsafe UNSAFE = UnsafeHelper.getUnsafe();
130 private final Object monitor = new Object();
131 // Following field have to be static in order to avoid escape analysis.
132 @SuppressWarnings("UnsuedDeclaration")
133 private static int field = 0;
134
135 @Override
136 public String getMethodWithLockName() {
137 return this.getClass().getName() + "::lock";
138 }
139
140 @Override
141 public String[] getMethodsToCompileNames() {
142 return new String[] { getMethodWithLockName() };
143 }
144
145 public void lock(boolean abort) {
146 synchronized(monitor) {
147 if (abort) {
148 Test.UNSAFE.addressSize();
149 }
150 }
151 }
152
153 /**
154 * Usage:
155 * Test <inflate monitor>
156 */
157 public static void main(String args[]) throws Throwable {
158 Asserts.assertGTE(args.length, 1, "One argument required.");
159 Test t = new Test();
160 boolean shouldBeInflated = Boolean.valueOf(args[0]);
161 if (shouldBeInflated) {
162 AbortProvoker.inflateMonitor(t.monitor);
163 }
164 for (int i = 0; i < Test.TOTAL_ITERATIONS; i++) {
165 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated);
166 t.lock(i >= Test.WARMUP_ITERATIONS);
167 }
168 }
169 }
170
171 public static void main(String args[]) throws Throwable {
172 new TestRTMAbortRatio().test();
173 }
174 }
175