1 /*
2 * Copyright (c) 2014, 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 /testlibrary/whitebox /compiler/testlibrary
30 * @build TestRTMDeoptOnLowAbortRatio
31 * @run main ClassFileInstaller sun.hotspot.WhiteBox
32 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
33 * -XX:+WhiteBoxAPI TestRTMDeoptOnLowAbortRatio
34 */
35
36 import java.util.List;
37 import com.oracle.java.testlibrary.*;
38 import com.oracle.java.testlibrary.cli.CommandLineOptionTest;
39 import com.oracle.java.testlibrary.cli.predicate.AndPredicate;
40 import rtm.*;
41 import rtm.predicate.SupportedCPU;
42 import rtm.predicate.SupportedVM;
43 import sun.misc.Unsafe;
44
45 /**
46 * Test verifies that low abort ratio method will be deoptimized with
47 * <i>rtm_state_change</i> reason and will continue to use RTM-based lock
48 * elision after that.
49 * This test make asserts on total locks count done by compiled method,
50 * so in order to avoid issue with retriable locks -XX:RTMRetryCount=0 is used.
51 * For more details on that issue see {@link TestUseRTMAfterLockInflation}.
52 */
53 public class TestRTMDeoptOnLowAbortRatio extends CommandLineOptionTest {
54 private static final long LOCKING_THRESHOLD = 100L;
55
56 private TestRTMDeoptOnLowAbortRatio() {
57 super(new AndPredicate(new SupportedCPU(), new SupportedVM()));
58 }
59
60 @Override
61 protected void runTestCases() throws Throwable {
62 verifyRTMDeopt(false);
63 verifyRTMDeopt(true);
64 }
65
66 private void verifyRTMDeopt(boolean useStackLock) throws Throwable {
67 CompilableTest test = new Test();
68 String logFileName = String.format("rtm_deopt_%s_stack_lock.xml",
69 useStackLock ? "use" : "no");
70
71 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
72 logFileName,
73 test,
74 "-XX:+UseRTMDeopt",
75 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
76 useStackLock),
77 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",
78 TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD),
79 "-XX:RTMAbortThreshold=1",
80 "-XX:RTMAbortRatio=100",
81 "-XX:CompileThreshold=1",
82 "-XX:RTMRetryCount=0",
83 "-XX:RTMTotalCountIncrRate=1",
84 "-XX:+PrintPreciseRTMLockingStatistics",
85 Test.class.getName(),
86 Boolean.toString(!useStackLock)
87 );
88
89 outputAnalyzer.shouldHaveExitValue(0);
90
91 int firedTraps = RTMTestBase.firedRTMStateChangeTraps(logFileName);
92
93 Asserts.assertEQ(firedTraps, 1,
94 "Expected to get only one deoptimization due to rtm"
95 + " state change");
96
97 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
98 test.getMethodWithLockName(), outputAnalyzer.getOutput());
99
100 Asserts.assertEQ(statistics.size(), 2,
101 "VM output should contain two RTM locking "
102 + "statistics entries for method "
103 + test.getMethodWithLockName());
104
105 RTMLockingStatistics statisticsBeforeDeopt = null;
106
107 for (RTMLockingStatistics s : statistics) {
108 if (s.getTotalLocks()
109 == TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD + 1L) {
110 Asserts.assertNull(statisticsBeforeDeopt,
111 "Only one abort was expected during test run");
112 statisticsBeforeDeopt = s;
113 }
114 }
115
116 Asserts.assertNotNull(statisticsBeforeDeopt,
117 "After LockThreshold was reached, method should be recompiled "
118 + "with rtm lock eliding.");
119 }
120
121 public static class Test implements CompilableTest {
122 private static final Unsafe UNSAFE = Utils.getUnsafe();
123 private final Object monitor = new Object();
124
125 @Override
126 public String getMethodWithLockName() {
127 return this.getClass().getName() + "::forceAbort";
128 }
129
130 @Override
131 public String[] getMethodsToCompileNames() {
132 return new String[] {
133 getMethodWithLockName(),
134 sun.misc.Unsafe.class.getName() + "::addressSize"
135 };
136 }
137
138 public void forceAbort(boolean abort) {
139 synchronized(monitor) {
140 if (abort) {
141 Test.UNSAFE.addressSize();
142 }
143 }
144 }
145
146 /**
147 * Usage:
148 * Test <inflate monitor>
149 */
150 public static void main(String args[]) throws Throwable {
151 Asserts.assertGTE(args.length, 1, "One argument required.");
152 Test t = new Test();
153
154 if (Boolean.valueOf(args[0])) {
155 AbortProvoker.inflateMonitor(t.monitor);
156 }
157 for (int i = 0; i < AbortProvoker.DEFAULT_ITERATIONS; i++) {
158 t.forceAbort(
159 i == TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD);
160 }
161 }
162 }
163
164 public static void main(String args[]) throws Throwable {
165 new TestRTMDeoptOnLowAbortRatio().test();
166 }
167 }