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 * @requires vm.flavor == "server" & !vm.emulatedClient & vm.rtm.cpu & vm.rtm.os
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 jdk.internal.misc.Unsafe;
48 import jdk.test.lib.Asserts;
49 import jdk.test.lib.process.OutputAnalyzer;
50 import jdk.test.lib.cli.CommandLineOptionTest;
51
52 import java.util.List;
53
54 /**
55 * Test verifies that method will be deoptimized on high abort ratio
56 * as soon as abort ratio reaches RTMAbortRatio's value.
57 */
58 public class TestRTMAbortRatio {
59
60 protected void runTestCases() throws Throwable {
61 verifyAbortRatio(0, false);
62 verifyAbortRatio(10, false);
63 verifyAbortRatio(50, false);
64 verifyAbortRatio(100, false);
65
66 verifyAbortRatio(0, true);
67 verifyAbortRatio(10, true);
68 verifyAbortRatio(50, true);
69 verifyAbortRatio(100, true);
70 }
71
72 private void verifyAbortRatio(int abortRatio, boolean useStackLock)
73 throws Throwable {
74 CompilableTest test = new Test();
75
76 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
77 test,
78 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
79 useStackLock),
80 "-XX:+UseRTMDeopt",
81 "-XX:RTMTotalCountIncrRate=1",
82 "-XX:RTMAbortThreshold=0",
83 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",
84 10 * Test.TOTAL_ITERATIONS),
85 CommandLineOptionTest.prepareNumericFlag("RTMAbortRatio",
86 abortRatio),
87 "-XX:+PrintPreciseRTMLockingStatistics",
88 test.getClass().getName(),
89 Boolean.toString(!useStackLock));
90
91 outputAnalyzer.shouldHaveExitValue(0);
92
93 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
94 test.getMethodWithLockName(), outputAnalyzer.getOutput());
95
96 Asserts.assertEQ(statistics.size(), 1, "VM output should contain "
97 + "exactly one RTM locking statistics entry.");
98
99 RTMLockingStatistics lock = statistics.get(0);
100 int actualRatio;
101
102 if (lock.getTotalAborts() == 1L) {
103 actualRatio = 0;
104 } else {
105 actualRatio = (int) (lock.getTotalLocks()
106 / (lock.getTotalAborts() - 1L));
107 }
108
109 Asserts.assertLTE(actualRatio, abortRatio, String.format(
110 "Actual abort ratio (%d) should lower or equal to "
111 + "specified (%d).", actualRatio, abortRatio));
112 }
113
114 /**
115 * Force abort after {@code Test.WARMUP_ITERATIONS} is done.
116 */
117 public static class Test implements CompilableTest {
118 private static final int TOTAL_ITERATIONS = 10000;
119 private static final int WARMUP_ITERATIONS = 1000;
120 private static final Unsafe UNSAFE = Unsafe.getUnsafe();
121 private final Object monitor = new Object();
122 // Following field have to be static in order to avoid escape analysis.
123 @SuppressWarnings("UnsuedDeclaration")
124 private static int field = 0;
125
126 @Override
127 public String getMethodWithLockName() {
128 return this.getClass().getName() + "::lock";
129 }
130
131 @Override
132 public String[] getMethodsToCompileNames() {
133 return new String[] { getMethodWithLockName(), "*.pageSize" };
134 }
135
136 public void lock(boolean abort) {
137 synchronized(monitor) {
138 if (abort) {
139 Test.UNSAFE.pageSize();
140 }
141 }
142 }
143
144 /**
145 * Usage:
146 * Test <inflate monitor>
147 */
148 public static void main(String args[]) throws Throwable {
149 Asserts.assertGTE(args.length, 1, "One argument required.");
150 Test t = new Test();
151 boolean shouldBeInflated = Boolean.valueOf(args[0]);
152 if (shouldBeInflated) {
153 AbortProvoker.inflateMonitor(t.monitor);
154 }
155 for (int i = 0; i < Test.TOTAL_ITERATIONS; i++) {
156 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated);
157 t.lock(i >= Test.WARMUP_ITERATIONS);
158 }
159 }
160 }
161
162 public static void main(String args[]) throws Throwable {
163 new TestRTMAbortRatio().runTestCases();
164 }
165 }
166