1 /*
2 * Copyright (c) 2014, 2015, 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 /testlibrary /test/lib /
31 * @modules java.base/jdk.internal.misc
32 * java.management
33 * @build TestRTMAbortRatio
34 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
35 * sun.hotspot.WhiteBox$WhiteBoxPermission
36 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
37 * -XX:+WhiteBoxAPI TestRTMAbortRatio
38 */
39
40 import java.util.List;
41 import jdk.test.lib.*;
42 import jdk.test.lib.cli.CommandLineOptionTest;
43 import jdk.test.lib.cli.predicate.AndPredicate;
44 import compiler.testlibrary.rtm.*;
45 import compiler.testlibrary.rtm.predicate.SupportedCPU;
46 import compiler.testlibrary.rtm.predicate.SupportedVM;
47 import jdk.internal.misc.Unsafe;
48
49 /**
50 * Test verifies that method will be deoptimized on high abort ratio
51 * as soon as abort ratio reaches RTMAbortRatio's value.
52 */
53 public class TestRTMAbortRatio extends CommandLineOptionTest {
54 private TestRTMAbortRatio() {
55 super(new AndPredicate(new SupportedCPU(), new SupportedVM()));
56 }
57
58 @Override
59 protected void runTestCases() throws Throwable {
60 verifyAbortRatio(0, false);
61 verifyAbortRatio(10, false);
62 verifyAbortRatio(50, false);
63 verifyAbortRatio(100, false);
64
65 verifyAbortRatio(0, true);
66 verifyAbortRatio(10, true);
67 verifyAbortRatio(50, true);
68 verifyAbortRatio(100, true);
69 }
70
71 private void verifyAbortRatio(int abortRatio, boolean useStackLock)
72 throws Throwable {
73 CompilableTest test = new Test();
74
75 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
76 test,
77 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
78 useStackLock),
79 "-XX:+UseRTMDeopt",
80 "-XX:RTMTotalCountIncrRate=1",
81 "-XX:RTMAbortThreshold=0",
82 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",
83 10 * Test.TOTAL_ITERATIONS),
84 CommandLineOptionTest.prepareNumericFlag("RTMAbortRatio",
85 abortRatio),
86 "-XX:+PrintPreciseRTMLockingStatistics",
87 test.getClass().getName(),
88 Boolean.toString(!useStackLock));
89
90 outputAnalyzer.shouldHaveExitValue(0);
91
92 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
93 test.getMethodWithLockName(), outputAnalyzer.getOutput());
94
95 Asserts.assertEQ(statistics.size(), 1, "VM output should contain "
96 + "exactly one RTM locking statistics entry.");
97
98 RTMLockingStatistics lock = statistics.get(0);
99 int actualRatio;
100
101 if (lock.getTotalAborts() == 1L) {
102 actualRatio = 0;
103 } else {
104 actualRatio = (int) (lock.getTotalLocks()
105 / (lock.getTotalAborts() - 1L));
106 }
107
108 Asserts.assertLTE(actualRatio, abortRatio, String.format(
109 "Actual abort ratio (%d) should lower or equal to "
110 + "specified (%d).", actualRatio, abortRatio));
111 }
112
113 /**
114 * Force abort after {@code Test.WARMUP_ITERATIONS} is done.
115 */
116 public static class Test implements CompilableTest {
117 private static final int TOTAL_ITERATIONS = 10000;
118 private static final int WARMUP_ITERATIONS = 1000;
119 private static final Unsafe UNSAFE = Utils.getUnsafe();
120 private final Object monitor = new Object();
121 // Following field have to be static in order to avoid escape analysis.
122 @SuppressWarnings("UnsuedDeclaration")
123 private static int field = 0;
124
125 @Override
126 public String getMethodWithLockName() {
127 return this.getClass().getName() + "::lock";
128 }
129
130 @Override
131 public String[] getMethodsToCompileNames() {
132 return new String[] { getMethodWithLockName() };
133 }
134
135 public void lock(boolean abort) {
136 synchronized(monitor) {
137 if (abort) {
138 Test.UNSAFE.addressSize();
139 }
140 }
141 }
142
143 /**
144 * Usage:
145 * Test <inflate monitor>
146 */
147 public static void main(String args[]) throws Throwable {
148 Asserts.assertGTE(args.length, 1, "One argument required.");
149 Test t = new Test();
150 boolean shouldBeInflated = Boolean.valueOf(args[0]);
151 if (shouldBeInflated) {
152 AbortProvoker.inflateMonitor(t.monitor);
153 }
154 for (int i = 0; i < Test.TOTAL_ITERATIONS; i++) {
155 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated);
156 t.lock(i >= Test.WARMUP_ITERATIONS);
157 }
158 }
159 }
160
161 public static void main(String args[]) throws Throwable {
162 new TestRTMAbortRatio().test();
163 }
164 }
165