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