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.SupportedOS;
49 import compiler.testlibrary.rtm.predicate.SupportedVM;
50 import jdk.internal.misc.Unsafe;
51 import jdk.test.lib.Asserts;
52 import jdk.test.lib.process.OutputAnalyzer;
53 import jdk.test.lib.unsafe.UnsafeHelper;
54 import jdk.test.lib.cli.CommandLineOptionTest;
55 import jdk.test.lib.cli.predicate.AndPredicate;
56
57 import java.util.List;
58
59 /**
60 * Test verifies that RTMLockingThreshold option actually affects how soon
61 * method will be deoptimized on low abort ratio.
62 */
63 public class TestRTMLockingThreshold extends CommandLineOptionTest {
64 private TestRTMLockingThreshold() {
65 super(new AndPredicate(new SupportedCPU(), new SupportedOS(), new SupportedVM()));
66 }
67
68 /**
69 * We use non-zero abort threshold to avoid abort related to
70 * interrupts, VMM calls, etc. during first lock attempt.
71 *
72 */
73 private static final int MIN_ABORT_THRESHOLD = 10;
74
75 @Override
76 protected void runTestCases() throws Throwable {
77 verifyLockingThreshold(0, false);
78 verifyLockingThreshold(100, false);
79 verifyLockingThreshold(1000, false);
80
81 verifyLockingThreshold(0, true);
82 verifyLockingThreshold(100, true);
83 verifyLockingThreshold(1000, true);
84 }
85
86 private void verifyLockingThreshold(int lockingThreshold,
87 boolean useStackLock) throws Throwable {
88 CompilableTest test = new Test();
89
90 int abortThreshold = Math.max(lockingThreshold / 2,
91 TestRTMLockingThreshold.MIN_ABORT_THRESHOLD);
92
93 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
94 test,
95 "-XX:CompileThreshold=1",
96 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
97 useStackLock),
98 "-XX:+UseRTMDeopt",
99 "-XX:RTMTotalCountIncrRate=1",
100 "-XX:RTMRetryCount=0",
101 CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold",
102 abortThreshold),
103 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",
104 lockingThreshold),
105 "-XX:RTMAbortRatio=100",
106 "-XX:+PrintPreciseRTMLockingStatistics",
107 Test.class.getName(),
108 Boolean.toString(!useStackLock),
109 Integer.toString(lockingThreshold)
110 );
111
112 outputAnalyzer.shouldHaveExitValue(0);
113
114 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
115 test.getMethodWithLockName(), outputAnalyzer.getOutput());
116
117 Asserts.assertEQ(statistics.size(), 2, "VM output should contain two "
118 + "RTM locking statistics entries.");
119
120 /**
121 * If RTMLockingThreshold==0, then we have to make at least 1 call.
122 */
123 long expectedValue = lockingThreshold;
124 if (expectedValue == 0) {
125 expectedValue++;
126 }
127
128 RTMLockingStatistics statBeforeDeopt = null;
129 for (RTMLockingStatistics s : statistics) {
130 if (s.getTotalLocks() == expectedValue) {
131 Asserts.assertNull(statBeforeDeopt,
132 "Only one statistics entry should contain aborts");
133 statBeforeDeopt = s;
134 }
135 }
136
137 Asserts.assertNotNull(statBeforeDeopt, "There should be exactly one "
138 + "statistics entry corresponding to ProfileRTM state.");
139 }
140
141 public static class Test implements CompilableTest {
142 // Following field have to be static in order to avoid escape analysis.
143 @SuppressWarnings("UnsuedDeclaration")
144 private static int field = 0;
145 private static final int TOTAL_ITERATIONS = 10000;
146 private static final Unsafe UNSAFE = UnsafeHelper.getUnsafe();
147 private final Object monitor = new Object();
148
149
150 @Override
151 public String getMethodWithLockName() {
152 return this.getClass().getName() + "::lock";
153 }
154
155 @Override
156 public String[] getMethodsToCompileNames() {
157 return new String[] { getMethodWithLockName() };
158 }
159
160 public void lock(boolean abort) {
161 synchronized(monitor) {
162 if (abort) {
163 Test.field += Test.UNSAFE.addressSize();
164 }
165 }
166 }
167
168 /**
169 * Usage:
170 * Test <inflate monitor>
171 */
172 public static void main(String args[]) throws Throwable {
173 Asserts.assertGTE(args.length, 2, "Two arguments required.");
174 Test t = new Test();
175 boolean shouldBeInflated = Boolean.valueOf(args[0]);
176 int lockingThreshold = Integer.valueOf(args[1]);
177 if (shouldBeInflated) {
178 AbortProvoker.inflateMonitor(t.monitor);
179 }
180 for (int i = 0; i < Test.TOTAL_ITERATIONS; i++) {
181 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated);
182 t.lock(i >= lockingThreshold / 2);
183 }
184 }
185 }
186
187 public static void main(String args[]) throws Throwable {
188 new TestRTMLockingThreshold().test();
189 }
190 }