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