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 RTMLockingThreshold affects rtm state transition
29 * ProfileRTM => UseRTM.
30 * @library /testlibrary /test/lib /compiler/testlibrary
31 * @modules java.base/sun.misc
32 * java.management
33 * @build TestRTMLockingThreshold
34 * @run main ClassFileInstaller sun.hotspot.WhiteBox
35 * sun.hotspot.WhiteBox$WhiteBoxPermission
36 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
37 * -XX:+WhiteBoxAPI TestRTMLockingThreshold
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 rtm.*;
45 import rtm.predicate.SupportedCPU;
46 import rtm.predicate.SupportedVM;
47 import sun.misc.Unsafe;
48
49 /**
50 * Test verifies that RTMLockingThreshold option actually affects how soon
51 * method will be deoptimized on low abort ratio.
52 */
53 public class TestRTMLockingThreshold extends CommandLineOptionTest {
54 private TestRTMLockingThreshold() {
55 super(new AndPredicate(new SupportedVM(), new SupportedCPU()));
56 }
57
58 /**
59 * We use non-zero abort threshold to avoid abort related to
60 * interrupts, VMM calls, etc. during first lock attempt.
61 *
62 */
63 private static final int MIN_ABORT_THRESHOLD = 10;
64
65 @Override
66 protected void runTestCases() throws Throwable {
67 verifyLockingThreshold(0, false);
68 verifyLockingThreshold(100, false);
69 verifyLockingThreshold(1000, false);
70
71 verifyLockingThreshold(0, true);
72 verifyLockingThreshold(100, true);
73 verifyLockingThreshold(1000, true);
74 }
75
76 private void verifyLockingThreshold(int lockingThreshold,
77 boolean useStackLock) throws Throwable {
78 CompilableTest test = new Test();
79
80 int abortThreshold = Math.max(lockingThreshold / 2,
81 TestRTMLockingThreshold.MIN_ABORT_THRESHOLD);
82
83 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
84 test,
85 "-XX:CompileThreshold=1",
86 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
87 useStackLock),
88 "-XX:+UseRTMDeopt",
89 "-XX:RTMTotalCountIncrRate=1",
90 "-XX:RTMRetryCount=0",
91 CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold",
92 abortThreshold),
93 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",
94 lockingThreshold),
95 "-XX:RTMAbortRatio=100",
96 "-XX:+PrintPreciseRTMLockingStatistics",
97 Test.class.getName(),
98 Boolean.toString(!useStackLock),
99 Integer.toString(lockingThreshold)
100 );
101
102 outputAnalyzer.shouldHaveExitValue(0);
103
104 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
105 test.getMethodWithLockName(), outputAnalyzer.getOutput());
106
107 Asserts.assertEQ(statistics.size(), 2, "VM output should contain two "
108 + "RTM locking statistics entries.");
109
110 /**
111 * If RTMLockingThreshold==0, then we have to make at least 1 call.
112 */
113 long expectedValue = lockingThreshold;
114 if (expectedValue == 0) {
115 expectedValue++;
116 }
117
118 RTMLockingStatistics statBeforeDeopt = null;
119 for (RTMLockingStatistics s : statistics) {
120 if (s.getTotalLocks() == expectedValue) {
121 Asserts.assertNull(statBeforeDeopt,
122 "Only one statistics entry should contain aborts");
123 statBeforeDeopt = s;
124 }
125 }
126
127 Asserts.assertNotNull(statBeforeDeopt, "There should be exactly one "
128 + "statistics entry corresponding to ProfileRTM state.");
129 }
130
131 public static class Test implements CompilableTest {
132 // Following field have to be static in order to avoid escape analysis.
133 @SuppressWarnings("UnsuedDeclaration")
134 private static int field = 0;
135 private static final int TOTAL_ITERATIONS = 10000;
136 private static final Unsafe UNSAFE = Utils.getUnsafe();
137 private final Object monitor = new Object();
138
139
140 @Override
141 public String getMethodWithLockName() {
142 return this.getClass().getName() + "::lock";
143 }
144
145 @Override
146 public String[] getMethodsToCompileNames() {
147 return new String[] { getMethodWithLockName() };
148 }
149
150 public void lock(boolean abort) {
151 synchronized(monitor) {
152 if (abort) {
153 Test.field += Test.UNSAFE.addressSize();
154 }
155 }
156 }
157
158 /**
159 * Usage:
160 * Test <inflate monitor>
161 */
162 public static void main(String args[]) throws Throwable {
163 Asserts.assertGTE(args.length, 2, "Two arguments required.");
164 Test t = new Test();
165 boolean shouldBeInflated = Boolean.valueOf(args[0]);
166 int lockingThreshold = Integer.valueOf(args[1]);
167 if (shouldBeInflated) {
168 AbortProvoker.inflateMonitor(t.monitor);
169 }
170 for (int i = 0; i < Test.TOTAL_ITERATIONS; i++) {
171 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated);
172 t.lock(i >= lockingThreshold / 2);
173 }
174 }
175 }
176
177 public static void main(String args[]) throws Throwable {
178 new TestRTMLockingThreshold().test();
179 }
180 }