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 sun.hotspot.WhiteBox
32 * sun.hotspot.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 private static final long ABORT_THRESHOLD = LOCKING_THRESHOLD / 2L;
57
58 private TestRTMDeoptOnLowAbortRatio() {
59 super(new AndPredicate(new SupportedCPU(), new SupportedVM()));
60 }
61
62 @Override
63 protected void runTestCases() throws Throwable {
64 verifyRTMDeopt(false);
65 verifyRTMDeopt(true);
66 }
67
68 private void verifyRTMDeopt(boolean useStackLock) throws Throwable {
69 CompilableTest test = new Test();
70 String logFileName = String.format("rtm_deopt_%s_stack_lock.xml",
71 useStackLock ? "use" : "no");
72
73 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
74 logFileName,
75 test,
76 "-XX:+UseRTMDeopt",
77 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
78 useStackLock),
79 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",
80 TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD),
81 CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold",
82 TestRTMDeoptOnLowAbortRatio.ABORT_THRESHOLD),
83 "-XX:RTMAbortRatio=100",
84 "-XX:CompileThreshold=1",
85 "-XX:RTMRetryCount=0",
86 "-XX:RTMTotalCountIncrRate=1",
87 "-XX:+PrintPreciseRTMLockingStatistics",
88 Test.class.getName(),
89 Boolean.toString(!useStackLock)
90 );
91
92 outputAnalyzer.shouldHaveExitValue(0);
93
94 int firedTraps = RTMTestBase.firedRTMStateChangeTraps(logFileName);
95
96 Asserts.assertEQ(firedTraps, 1,
97 "Expected to get only one deoptimization due to rtm"
98 + " state change");
99
100 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
101 test.getMethodWithLockName(), outputAnalyzer.getOutput());
102
103 Asserts.assertEQ(statistics.size(), 2,
104 "VM output should contain two RTM locking "
105 + "statistics entries for method "
106 + test.getMethodWithLockName());
107
108 RTMLockingStatistics statisticsBeforeDeopt = null;
109
110 for (RTMLockingStatistics s : statistics) {
111 if (s.getTotalLocks()
112 == TestRTMDeoptOnLowAbortRatio.LOCKING_THRESHOLD) {
113 Asserts.assertNull(statisticsBeforeDeopt,
114 "Only one abort was expected during test run");
115 statisticsBeforeDeopt = s;
116 }
117 }
118
119 Asserts.assertNotNull(statisticsBeforeDeopt,
120 "After LockThreshold was reached, method should be recompiled "
121 + "with rtm lock eliding.");
122 }
123
124 public static class Test implements CompilableTest {
125 private static final Unsafe UNSAFE = Utils.getUnsafe();
126 private final Object monitor = new Object();
127
128 @Override
129 public String getMethodWithLockName() {
130 return this.getClass().getName() + "::forceAbort";
131 }
132
133 @Override
134 public String[] getMethodsToCompileNames() {
135 return new String[] { getMethodWithLockName() };
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 boolean shouldBeInflated = Boolean.valueOf(args[0]);
154 if (shouldBeInflated) {
155 AbortProvoker.inflateMonitor(t.monitor);
156 }
157 for (int i = 0; i < AbortProvoker.DEFAULT_ITERATIONS; i++) {
158 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated);
159 t.forceAbort(i >= TestRTMDeoptOnLowAbortRatio.ABORT_THRESHOLD);
160 }
161 }
162 }
163
164 public static void main(String args[]) throws Throwable {
165 new TestRTMDeoptOnLowAbortRatio().test();
166 }
167 }