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