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