1 /*
2 * Copyright (c) 2014, 2016, 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 /test/lib /
31 * @modules java.base/jdk.internal.misc
32 * java.management
33 * @build sun.hotspot.WhiteBox
34 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
35 * sun.hotspot.WhiteBox$WhiteBoxPermission
36 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
37 * -XX:+WhiteBoxAPI
38 * compiler.rtm.locking.TestRTMLockingThreshold
39 */
40
41 package compiler.rtm.locking;
42
43 import compiler.testlibrary.rtm.AbortProvoker;
44 import compiler.testlibrary.rtm.CompilableTest;
45 import compiler.testlibrary.rtm.RTMLockingStatistics;
46 import compiler.testlibrary.rtm.RTMTestBase;
47 import compiler.testlibrary.rtm.predicate.SupportedCPU;
48 import compiler.testlibrary.rtm.predicate.SupportedVM;
49 import jdk.internal.misc.Unsafe;
50 import jdk.test.lib.Asserts;
51 import jdk.test.lib.process.OutputAnalyzer;
52 import jdk.test.lib.unsafe.UnsafeHelper;
53 import jdk.test.lib.cli.CommandLineOptionTest;
54 import jdk.test.lib.cli.predicate.AndPredicate;
55
56 import java.util.List;
57
58 /**
59 * Test verifies that RTMLockingThreshold option actually affects how soon
60 * method will be deoptimized on low abort ratio.
61 */
62 public class TestRTMLockingThreshold extends CommandLineOptionTest {
63 private TestRTMLockingThreshold() {
64 super(new AndPredicate(new SupportedVM(), new SupportedCPU()));
65 }
66
67 /**
68 * We use non-zero abort threshold to avoid abort related to
69 * interrupts, VMM calls, etc. during first lock attempt.
70 *
71 */
72 private static final int MIN_ABORT_THRESHOLD = 10;
73
74 @Override
75 protected void runTestCases() throws Throwable {
76 verifyLockingThreshold(0, false);
77 verifyLockingThreshold(100, false);
78 verifyLockingThreshold(1000, false);
79
80 verifyLockingThreshold(0, true);
81 verifyLockingThreshold(100, true);
82 verifyLockingThreshold(1000, true);
83 }
84
85 private void verifyLockingThreshold(int lockingThreshold,
86 boolean useStackLock) throws Throwable {
87 CompilableTest test = new Test();
88
89 int abortThreshold = Math.max(lockingThreshold / 2,
90 TestRTMLockingThreshold.MIN_ABORT_THRESHOLD);
91
92 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
93 test,
94 "-XX:CompileThreshold=1",
95 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
96 useStackLock),
97 "-XX:+UseRTMDeopt",
98 "-XX:RTMTotalCountIncrRate=1",
99 "-XX:RTMRetryCount=0",
100 CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold",
101 abortThreshold),
102 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",
103 lockingThreshold),
104 "-XX:RTMAbortRatio=100",
105 "-XX:+PrintPreciseRTMLockingStatistics",
106 Test.class.getName(),
107 Boolean.toString(!useStackLock),
108 Integer.toString(lockingThreshold)
109 );
110
111 outputAnalyzer.shouldHaveExitValue(0);
112
113 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
114 test.getMethodWithLockName(), outputAnalyzer.getOutput());
115
116 Asserts.assertEQ(statistics.size(), 2, "VM output should contain two "
117 + "RTM locking statistics entries.");
118
119 /**
120 * If RTMLockingThreshold==0, then we have to make at least 1 call.
121 */
122 long expectedValue = lockingThreshold;
123 if (expectedValue == 0) {
124 expectedValue++;
125 }
126
127 RTMLockingStatistics statBeforeDeopt = null;
128 for (RTMLockingStatistics s : statistics) {
129 if (s.getTotalLocks() == expectedValue) {
130 Asserts.assertNull(statBeforeDeopt,
131 "Only one statistics entry should contain aborts");
132 statBeforeDeopt = s;
133 }
134 }
135
136 Asserts.assertNotNull(statBeforeDeopt, "There should be exactly one "
137 + "statistics entry corresponding to ProfileRTM state.");
138 }
139
140 public static class Test implements CompilableTest {
141 // Following field have to be static in order to avoid escape analysis.
142 @SuppressWarnings("UnsuedDeclaration")
143 private static int field = 0;
144 private static final int TOTAL_ITERATIONS = 10000;
145 private static final Unsafe UNSAFE = UnsafeHelper.getUnsafe();
146 private final Object monitor = new Object();
147
148
149 @Override
150 public String getMethodWithLockName() {
151 return this.getClass().getName() + "::lock";
152 }
153
154 @Override
155 public String[] getMethodsToCompileNames() {
156 return new String[] { getMethodWithLockName() };
157 }
158
159 public void lock(boolean abort) {
160 synchronized(monitor) {
161 if (abort) {
162 Test.field += Test.UNSAFE.addressSize();
163 }
164 }
165 }
166
167 /**
168 * Usage:
169 * Test <inflate monitor>
170 */
171 public static void main(String args[]) throws Throwable {
172 Asserts.assertGTE(args.length, 2, "Two arguments required.");
173 Test t = new Test();
174 boolean shouldBeInflated = Boolean.valueOf(args[0]);
175 int lockingThreshold = Integer.valueOf(args[1]);
176 if (shouldBeInflated) {
177 AbortProvoker.inflateMonitor(t.monitor);
178 }
179 for (int i = 0; i < Test.TOTAL_ITERATIONS; i++) {
180 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated);
181 t.lock(i >= lockingThreshold / 2);
182 }
183 }
184 }
185
186 public static void main(String args[]) throws Throwable {
187 new TestRTMLockingThreshold().test();
188 }
189 }