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