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 on low abort ratio method will be recompiled.
29 * @library /testlibrary /test/lib /compiler/testlibrary
30 * @modules java.base/sun.misc
31 * java.management
32 * @build TestRTMDeoptOnLowAbortRatio
33 * @run main ClassFileInstaller sun.hotspot.WhiteBox
34 * sun.hotspot.WhiteBox$WhiteBoxPermission
35 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
36 * -XX:+WhiteBoxAPI TestRTMDeoptOnLowAbortRatio
37 */
38
39 import java.util.List;
40 import jdk.test.lib.*;
41 import jdk.test.lib.cli.CommandLineOptionTest;
42 import jdk.test.lib.cli.predicate.AndPredicate;
43 import rtm.*;
44 import rtm.predicate.SupportedCPU;
45 import rtm.predicate.SupportedVM;
46 import sun.misc.Unsafe;
47
48 /**
49 * Test verifies that low abort ratio method will be deoptimized with
50 * <i>rtm_state_change</i> reason and will continue to use RTM-based lock
51 * elision after that.
52 * This test make asserts on total locks count done by compiled method,
53 * so in order to avoid issue with retriable locks -XX:RTMRetryCount=0 is used.
54 * For more details on that issue see {@link TestUseRTMAfterLockInflation}.
55 */
56 public class TestRTMDeoptOnLowAbortRatio extends CommandLineOptionTest {
57 private static final long LOCKING_THRESHOLD = 100L;
58 private static final long ABORT_THRESHOLD = LOCKING_THRESHOLD / 2L;
59
60 private TestRTMDeoptOnLowAbortRatio() {
61 super(new AndPredicate(new SupportedCPU(), new SupportedVM()));
62 }
63
64 @Override
65 protected void runTestCases() throws Throwable {
66 verifyRTMDeopt(false);
67 verifyRTMDeopt(true);
68 }
69
70 private void verifyRTMDeopt(boolean useStackLock) throws Throwable {
71 CompilableTest test = new Test();
72 String logFileName = String.format("rtm_deopt_%s_stack_lock.xml",
73 useStackLock ? "use" : "no");
74
75 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
76 logFileName,
77 test,
78 "-XX:+UseRTMDeopt",
79 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
80 useStackLock),
81 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",
82 TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD),
83 CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold",
84 TestRTMDeoptOnLowAbortRatio.ABORT_THRESHOLD),
85 "-XX:RTMAbortRatio=100",
86 "-XX:CompileThreshold=1",
87 "-XX:RTMRetryCount=0",
88 "-XX:RTMTotalCountIncrRate=1",
89 "-XX:+PrintPreciseRTMLockingStatistics",
90 Test.class.getName(),
91 Boolean.toString(!useStackLock)
92 );
93
94 outputAnalyzer.shouldHaveExitValue(0);
95
96 int firedTraps = RTMTestBase.firedRTMStateChangeTraps(logFileName);
97
98 Asserts.assertEQ(firedTraps, 1,
99 "Expected to get only one deoptimization due to rtm"
100 + " state change");
101
102 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
103 test.getMethodWithLockName(), outputAnalyzer.getOutput());
104
105 Asserts.assertEQ(statistics.size(), 2,
106 "VM output should contain two RTM locking "
107 + "statistics entries for method "
108 + test.getMethodWithLockName());
109
110 RTMLockingStatistics statisticsBeforeDeopt = null;
111
112 for (RTMLockingStatistics s : statistics) {
113 if (s.getTotalLocks()
114 == TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD) {
115 Asserts.assertNull(statisticsBeforeDeopt,
116 "Only one abort was expected during test run");
117 statisticsBeforeDeopt = s;
118 }
119 }
120
121 Asserts.assertNotNull(statisticsBeforeDeopt,
122 "After LockThreshold was reached, method should be recompiled "
123 + "with rtm lock eliding.");
124 }
125
126 public static class Test implements CompilableTest {
127 private static final Unsafe UNSAFE = Utils.getUnsafe();
128 private final Object monitor = new Object();
129
130 @Override
131 public String getMethodWithLockName() {
132 return this.getClass().getName() + "::forceAbort";
133 }
134
135 @Override
136 public String[] getMethodsToCompileNames() {
137 return new String[] { getMethodWithLockName() };
138 }
139
140 public void forceAbort(boolean abort) {
141 synchronized(monitor) {
142 if (abort) {
143 Test.UNSAFE.addressSize();
144 }
145 }
146 }
147
148 /**
149 * Usage:
150 * Test <inflate monitor>
151 */
152 public static void main(String args[]) throws Throwable {
153 Asserts.assertGTE(args.length, 1, "One argument required.");
154 Test t = new Test();
155 boolean shouldBeInflated = Boolean.valueOf(args[0]);
156 if (shouldBeInflated) {
157 AbortProvoker.inflateMonitor(t.monitor);
158 }
159 for (int i = 0; i < AbortProvoker.DEFAULT_ITERATIONS; i++) {
160 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated);
161 t.forceAbort(i >= TestRTMDeoptOnLowAbortRatio.ABORT_THRESHOLD);
162 }
163 }
164 }
165
166 public static void main(String args[]) throws Throwable {
167 new TestRTMDeoptOnLowAbortRatio().test();
168 }
169 }