1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
/**
* @test
* @bug 8031320
* @summary Verify that RTMLockingThreshold affects rtm state transition
* ProfileRTM => UseRTM.
* @library /testlibrary /testlibrary/whitebox /compiler/testlibrary
* @build TestRTMLockingThreshold
* @run main ClassFileInstaller sun.hotspot.WhiteBox
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
* -XX:+WhiteBoxAPI TestRTMLockingThreshold
*/
import java.util.List;
import com.oracle.java.testlibrary.*;
import com.oracle.java.testlibrary.cli.CommandLineOptionTest;
import com.oracle.java.testlibrary.cli.predicate.AndPredicate;
import rtm.*;
import rtm.predicate.SupportedCPU;
import rtm.predicate.SupportedVM;
import sun.misc.Unsafe;
/**
* Test verifies that RTMLockingThreshold option actually affects how soon
* method will be deoptimized on low abort ratio.
*/
public class TestRTMLockingThreshold extends CommandLineOptionTest {
private TestRTMLockingThreshold() {
super(new AndPredicate(new SupportedVM(), new SupportedCPU()));
}
/**
* We use non-zero abort threshold to avoid abort related to
* interrupts, VMM calls, etc. during first lock attempt.
*
*/
private static final int ABORT_THRESHOLD = 10;
@Override
protected void runTestCases() throws Throwable {
verifyLockingThreshold(0, false);
verifyLockingThreshold(100, false);
verifyLockingThreshold(1000, false);
verifyLockingThreshold(0, true);
verifyLockingThreshold(100, true);
verifyLockingThreshold(1000, true);
}
private void verifyLockingThreshold(int lockingThreshold,
boolean useStackLock) throws Throwable {
CompilableTest test = new Test();
OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
test,
"-XX:CompileThreshold=1",
CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
useStackLock),
"-XX:+UseRTMDeopt",
"-XX:RTMTotalCountIncrRate=1",
"-XX:RTMRetryCount=0",
CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold",
TestRTMLockingThreshold.ABORT_THRESHOLD),
CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",
lockingThreshold),
"-XX:RTMAbortRatio=100",
"-XX:+PrintPreciseRTMLockingStatistics",
Test.class.getName(),
Boolean.toString(!useStackLock),
Integer.toString(lockingThreshold)
);
outputAnalyzer.shouldHaveExitValue(0);
List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
test.getMethodWithLockName(), outputAnalyzer.getOutput());
Asserts.assertEQ(statistics.size(), 2, "VM output should contain two "
+ "RTM locking statistics entries.");
/**
* We force abort on each odd iteration, so if RTMLockingThreshold==0,
* then we have to make 1 call without abort to avoid rtm state
* transition to NoRTM (otherwise actual abort ratio will be 100%),
* and after that make 1 call with abort to force deoptimization.
* This leads us to two locks for threshold 0.
* For other threshold values we have to make RTMLockingThreshold + 1
* locks if locking threshold is even, or + 0 if odd.
*/
long expectedValue = lockingThreshold +
(lockingThreshold == 0L ? 2L : lockingThreshold % 2L);
RTMLockingStatistics statBeforeDeopt = null;
for (RTMLockingStatistics s : statistics) {
if (s.getTotalLocks() == expectedValue) {
Asserts.assertNull(statBeforeDeopt,
"Only one statistics entry should contain aborts");
statBeforeDeopt = s;
}
}
Asserts.assertNotNull(statBeforeDeopt, "There should be exactly one "
+ "statistics entry corresponding to ProfileRTM state.");
}
public static class Test implements CompilableTest {
// Following field have to be static in order to avoid escape analysis.
@SuppressWarnings("UnsuedDeclaration")
private static int field = 0;
private static final int TOTAL_ITERATIONS = 10000;
private static final Unsafe UNSAFE = Utils.getUnsafe();
private final Object monitor = new Object();
@Override
public String getMethodWithLockName() {
return this.getClass().getName() + "::lock";
}
@Override
public String[] getMethodsToCompileNames() {
return new String[] {
getMethodWithLockName(),
sun.misc.Unsafe.class.getName() + "::addressSize"
};
}
public void lock(boolean abort) {
synchronized(monitor) {
if (abort) {
Test.field += Test.UNSAFE.addressSize();
}
}
}
/**
* Usage:
* Test <inflate monitor>
*/
public static void main(String args[]) throws Throwable {
Asserts.assertGTE(args.length, 1, "One argument required.");
Test t = new Test();
if (Boolean.valueOf(args[0])) {
AbortProvoker.inflateMonitor(t.monitor);
}
for (int i = 0; i < Test.TOTAL_ITERATIONS; i++) {
t.lock(i % 2 == 1);
}
}
}
public static void main(String args[]) throws Throwable {
new TestRTMLockingThreshold().test();
}
}
|
