1 /*
2 * Copyright (c) 2013, 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 * Common helpers for TestSummarizeRSetStats* tests
26 */
27
28 import sun.management.ManagementFactoryHelper;
29 import com.sun.management.HotSpotDiagnosticMXBean;
30 import com.sun.management.VMOption;
31
32 import com.oracle.java.testlibrary.*;
33 import java.util.regex.Matcher;
34 import java.util.regex.Pattern;
35 import java.lang.Thread;
36 import java.util.ArrayList;
37 import java.util.Arrays;
38
39 class VerifySummaryOutput {
40 // 4M size, both are directly allocated into the old gen
41 static Object[] largeObject1 = new Object[1024 * 1024];
42 static Object[] largeObject2 = new Object[1024 * 1024];
43
44 static int[] temp;
45
46 public static void main(String[] args) {
47 // create some cross-references between these objects
48 for (int i = 0; i < largeObject1.length; i++) {
49 largeObject1[i] = largeObject2;
50 }
51
52 for (int i = 0; i < largeObject2.length; i++) {
53 largeObject2[i] = largeObject1;
54 }
55
56 int numGCs = Integer.parseInt(args[0]);
57
58 if (numGCs > 0) {
59 // try to force a minor collection: the young gen is 4M, the
60 // amount of data allocated below is roughly that (4*1024*1024 +
61 // some header data)
62 for (int i = 0; i < 1024 ; i++) {
63 temp = new int[1024];
64 }
65 }
66
67 for (int i = 0; i < numGCs - 1; i++) {
68 System.gc();
69 }
70 }
71 }
72
73 public class TestSummarizeRSetStatsTools {
74
75 // the VM is currently run using G1GC, i.e. trying to test G1 functionality.
76 public static boolean testingG1GC() {
77 HotSpotDiagnosticMXBean diagnostic = ManagementFactoryHelper.getDiagnosticMXBean();
78
79 VMOption option = diagnostic.getVMOption("UseG1GC");
80 if (option.getValue().equals("false")) {
81 System.out.println("Skipping this test. It is only a G1 test.");
82 return false;
83 }
84 return true;
85 }
86
87 public static String runTest(String[] additionalArgs, int numGCs) throws Exception {
88 ArrayList<String> finalargs = new ArrayList<String>();
89 String[] defaultArgs = new String[] {
90 "-XX:+UseG1GC",
91 "-Xmn4m",
92 "-Xmx20m",
93 "-XX:InitiatingHeapOccupancyPercent=100", // we don't want the additional GCs due to initial marking
94 "-XX:+PrintGC",
95 "-XX:+UnlockDiagnosticVMOptions",
96 "-XX:G1HeapRegionSize=1M",
97 };
98
99 finalargs.addAll(Arrays.asList(defaultArgs));
100
101 if (additionalArgs != null) {
102 finalargs.addAll(Arrays.asList(additionalArgs));
103 }
104
105 finalargs.add(VerifySummaryOutput.class.getName());
106 finalargs.add(String.valueOf(numGCs));
107
108 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
109 finalargs.toArray(new String[0]));
110 OutputAnalyzer output = new OutputAnalyzer(pb.start());
111
112 output.shouldHaveExitValue(0);
113
114 String result = output.getStdout();
115 return result;
116 }
117
118 private static void checkCounts(int expected, int actual, String which) throws Exception {
119 if (expected != actual) {
120 throw new Exception("RSet summaries mention " + which + " regions an incorrect number of times. Expected " + expected + ", got " + actual);
121 }
122 }
123
124 public static void expectPerRegionRSetSummaries(String result, int expectedCumulative, int expectedPeriodic) throws Exception {
125 expectRSetSummaries(result, expectedCumulative, expectedPeriodic);
126 int actualYoung = result.split("Young regions").length - 1;
127 int actualHumonguous = result.split("Humonguous regions").length - 1;
128 int actualFree = result.split("Free regions").length - 1;
129 int actualOther = result.split("Old regions").length - 1;
130
131 // the strings we check for above are printed four times per summary
132 int expectedPerRegionTypeInfo = (expectedCumulative + expectedPeriodic) * 4;
133
134 checkCounts(expectedPerRegionTypeInfo, actualYoung, "Young");
135 checkCounts(expectedPerRegionTypeInfo, actualHumonguous, "Humonguous");
136 checkCounts(expectedPerRegionTypeInfo, actualFree, "Free");
137 checkCounts(expectedPerRegionTypeInfo, actualOther, "Old");
138 }
139
140 public static void expectRSetSummaries(String result, int expectedCumulative, int expectedPeriodic) throws Exception {
141 int actualTotal = result.split("concurrent refinement").length - 1;
142 int actualCumulative = result.split("Cumulative RS summary").length - 1;
143
144 if (expectedCumulative != actualCumulative) {
145 throw new Exception("Incorrect amount of RSet summaries at the end. Expected " + expectedCumulative + ", got " + actualCumulative);
146 }
147
148 if (expectedPeriodic != (actualTotal - actualCumulative)) {
149 throw new Exception("Incorrect amount of per-period RSet summaries at the end. Expected " + expectedPeriodic + ", got " + (actualTotal - actualCumulative));
150 }
151 }
152 }
153