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 RTMTotalCountIncrRate option affects
29 * RTM locking statistics.
30 * @library /testlibrary /testlibrary/whitebox /compiler/testlibrary
31 * @build TestRTMTotalCountIncrRate
32 * @run main/othervm/bootclasspath -XX:+UnlockDiagnosticVMOptions
33 * -XX:+WhiteBoxAPI TestRTMTotalCountIncrRate
34 */
35
36 import java.util.List;
37
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
45 /**
46 * Test verifies that with RTMTotalCountIncrRate=1 RTM locking statistics
47 * contains precise information abort attempted locks and that with other values
48 * statistics contains information abort non-zero locking attempts.
49 * Since assert done for RTMTotalCountIncrRate=1 is pretty strict, test uses
50 * -XX:RTMRetryCount=0 to avoid issue with retriable aborts. For more details on
51 * that issue see {@link TestUseRTMAfterLockInflation}.
52 */
53 public class TestRTMTotalCountIncrRate extends CommandLineOptionTest {
54 private TestRTMTotalCountIncrRate() {
55 super(new AndPredicate(new SupportedCPU(), new SupportedVM()));
56 }
57
58 @Override
59 protected void runTestCases() throws Throwable {
60 verifyLocksCount(1, false);
61 verifyLocksCount(64, false);
62 verifyLocksCount(128, false);
63 verifyLocksCount(1, true);
64 verifyLocksCount(64, true);
65 verifyLocksCount(128, true);
66 }
67
68 private void verifyLocksCount(int incrRate, 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 CommandLineOptionTest.prepareNumericFlag(
77 "RTMTotalCountIncrRate", incrRate),
78 "-XX:RTMRetryCount=0",
79 "-XX:+PrintPreciseRTMLockingStatistics",
80 Test.class.getName(),
81 Boolean.toString(!useStackLock)
82 );
83
84 outputAnalyzer.shouldHaveExitValue(0);
85
86 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
87 test.getMethodWithLockName(), outputAnalyzer.getOutput());
88
89 Asserts.assertEQ(statistics.size(), 1, "VM output should contain "
90 + "exactly one RTM locking statistics entry for method "
91 + test.getMethodWithLockName());
92
93 RTMLockingStatistics lock = statistics.get(0);
94 if (incrRate == 1) {
95 Asserts.assertEQ(lock.getTotalLocks(), Test.TOTAL_ITERATIONS,
96 "Total locks should be exactly the same as amount of "
97 + "iterations.");
98 } else {
99 Asserts.assertGT(lock.getTotalLocks(), 0L, "RTM statistics "
100 + "should contain information for at least on lock.");
101 }
102 }
103
104 public static class Test implements CompilableTest {
105 private static final long TOTAL_ITERATIONS = 10000L;
106 private final Object monitor = new Object();
107 // Following field have to be static in order to avoid escape analysis.
108 @SuppressWarnings("UnsuedDeclaration")
109 private static int field = 0;
110
111 @Override
112 public String getMethodWithLockName() {
113 return this.getClass().getName() + "::lock";
114 }
115
116 @Override
117 public String[] getMethodsToCompileNames() {
118 return new String[] {
119 getMethodWithLockName()
120 };
121 }
122
123 public void lock() {
124 synchronized(monitor) {
125 Test.field++;
126 }
127 }
128
129 /**
130 * Usage:
131 * Test <inflate monitor>
132 */
133 public static void main(String args[]) throws Throwable {
134 Asserts.assertGTE(args.length, 1, "One argument required.");
135 Test test = new Test();
136
137 if (Boolean.valueOf(args[0])) {
138 AbortProvoker.inflateMonitor(test.monitor);
139 }
140 for (long i = 0L; i < Test.TOTAL_ITERATIONS; i++) {
141 test.lock();
142 }
143 }
144 }
145
146 public static void main(String args[]) throws Throwable {
147 new TestRTMTotalCountIncrRate().test();
148 }
149 }