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 * @test
26 * @bug 8031320
27 * @summary Verify that RTMAbortRatio affects amount of aborts before
28 * deoptimization.
29 * @library /test/lib /
30 * @modules java.base/jdk.internal.misc
31 * java.management
32 * @build sun.hotspot.WhiteBox
33 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
34 * sun.hotspot.WhiteBox$WhiteBoxPermission
35 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
36 * -XX:+WhiteBoxAPI
37 * compiler.rtm.locking.TestRTMAbortRatio
38 */
39
40 package compiler.rtm.locking;
41
42 import compiler.testlibrary.rtm.AbortProvoker;
43 import compiler.testlibrary.rtm.CompilableTest;
44 import compiler.testlibrary.rtm.RTMLockingStatistics;
45 import compiler.testlibrary.rtm.RTMTestBase;
46 import compiler.testlibrary.rtm.predicate.SupportedCPU;
47 import compiler.testlibrary.rtm.predicate.SupportedOS;
48 import compiler.testlibrary.rtm.predicate.SupportedVM;
49 import jdk.internal.misc.Unsafe;
50 import jdk.test.lib.Asserts;
51 import jdk.test.lib.process.OutputAnalyzer;
52 import jdk.test.lib.cli.CommandLineOptionTest;
53 import jdk.test.lib.cli.predicate.AndPredicate;
54
55 import java.util.List;
56
57 /**
58 * Test verifies that method will be deoptimized on high abort ratio
59 * as soon as abort ratio reaches RTMAbortRatio's value.
60 */
61 public class TestRTMAbortRatio extends CommandLineOptionTest {
62 private TestRTMAbortRatio() {
63 super(new AndPredicate(new SupportedCPU(), new SupportedOS(), new SupportedVM()));
64 }
65
66 @Override
67 protected void runTestCases() throws Throwable {
68 verifyAbortRatio(0, false);
69 verifyAbortRatio(10, false);
70 verifyAbortRatio(50, false);
71 verifyAbortRatio(100, false);
72
73 verifyAbortRatio(0, true);
74 verifyAbortRatio(10, true);
75 verifyAbortRatio(50, true);
76 verifyAbortRatio(100, true);
77 }
78
79 private void verifyAbortRatio(int abortRatio, boolean useStackLock)
80 throws Throwable {
81 CompilableTest test = new Test();
82
83 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
84 test,
85 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
86 useStackLock),
87 "-XX:+UseRTMDeopt",
88 "-XX:RTMTotalCountIncrRate=1",
89 "-XX:RTMAbortThreshold=0",
90 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",
91 10 * Test.TOTAL_ITERATIONS),
92 CommandLineOptionTest.prepareNumericFlag("RTMAbortRatio",
93 abortRatio),
94 "-XX:+PrintPreciseRTMLockingStatistics",
95 test.getClass().getName(),
96 Boolean.toString(!useStackLock));
97
98 outputAnalyzer.shouldHaveExitValue(0);
99
100 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
101 test.getMethodWithLockName(), outputAnalyzer.getOutput());
102
103 Asserts.assertEQ(statistics.size(), 1, "VM output should contain "
104 + "exactly one RTM locking statistics entry.");
105
106 RTMLockingStatistics lock = statistics.get(0);
107 int actualRatio;
108
109 if (lock.getTotalAborts() == 1L) {
110 actualRatio = 0;
111 } else {
112 actualRatio = (int) (lock.getTotalLocks()
113 / (lock.getTotalAborts() - 1L));
114 }
115
116 Asserts.assertLTE(actualRatio, abortRatio, String.format(
117 "Actual abort ratio (%d) should lower or equal to "
118 + "specified (%d).", actualRatio, abortRatio));
119 }
120
121 /**
122 * Force abort after {@code Test.WARMUP_ITERATIONS} is done.
123 */
124 public static class Test implements CompilableTest {
125 private static final int TOTAL_ITERATIONS = 10000;
126 private static final int WARMUP_ITERATIONS = 1000;
127 private static final Unsafe UNSAFE = Unsafe.getUnsafe();
128 private final Object monitor = new Object();
129 // Following field have to be static in order to avoid escape analysis.
130 @SuppressWarnings("UnsuedDeclaration")
131 private static int field = 0;
132
133 @Override
134 public String getMethodWithLockName() {
135 return this.getClass().getName() + "::lock";
136 }
137
138 @Override
139 public String[] getMethodsToCompileNames() {
140 return new String[] { getMethodWithLockName() };
141 }
142
143 public void lock(boolean abort) {
144 synchronized(monitor) {
145 if (abort) {
146 Test.UNSAFE.addressSize();
147 }
148 }
149 }
150
151 /**
152 * Usage:
153 * Test <inflate monitor>
154 */
155 public static void main(String args[]) throws Throwable {
156 Asserts.assertGTE(args.length, 1, "One argument required.");
157 Test t = new Test();
158 boolean shouldBeInflated = Boolean.valueOf(args[0]);
159 if (shouldBeInflated) {
160 AbortProvoker.inflateMonitor(t.monitor);
161 }
162 for (int i = 0; i < Test.TOTAL_ITERATIONS; i++) {
163 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated);
164 t.lock(i >= Test.WARMUP_ITERATIONS);
165 }
166 }
167 }
168
169 public static void main(String args[]) throws Throwable {
170 new TestRTMAbortRatio().test();
171 }
172 }
173