1 /*
2 * Copyright (c) 2019, 2020, 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 package gc.g1;
25
26 /*
27 * @test TestLargePageUseForHeap.java
28 * @summary Test that Java heap is allocated using large pages of the appropriate size if available.
29 * @bug 8221517
30 * @key gc
31 * @modules java.base/jdk.internal.misc
32 * @library /test/lib
33 * @requires vm.gc.G1
34 * @build sun.hotspot.WhiteBox
35 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
36 * @run main/othervm -Xbootclasspath/a:. -XX:+UseG1GC -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
37 -XX:+IgnoreUnrecognizedVMOptions -XX:+UseLargePages gc.g1.TestLargePageUseForHeap
38 */
39
40 import jdk.test.lib.process.OutputAnalyzer;
41 import jdk.test.lib.process.ProcessTools;
42 import jtreg.SkippedException;
43 import sun.hotspot.WhiteBox;
44
45 public class TestLargePageUseForHeap {
46 static long largePageSize;
47 static long smallPageSize;
48
49 static void checkSize(OutputAnalyzer output, long expectedSize, String pattern) {
50 String pageSizeStr = output.firstMatch(pattern, 1);
51
52 if (pageSizeStr == null) {
53 output.reportDiagnosticSummary();
54 throw new RuntimeException("Match from '" + pattern + "' got 'null' expected: " + expectedSize);
55 }
56
57 long size = parseMemoryString(pageSizeStr);
58 if (size != expectedSize) {
59 output.reportDiagnosticSummary();
60 throw new RuntimeException("Match from '" + pattern + "' got " + size + " expected: " + expectedSize);
61 }
62 }
63
64 static boolean checkLargePageEnabled(OutputAnalyzer output) {
65 // This message is printed when tried to reserve a memory with large page but it failed.
66 String errorStr = "Reserve regular memory without large pages";
67 String heapPattern = ".*Heap: ";
68 // If errorStr is printed just before heap page log, reservation for Java Heap is failed.
69 String result = output.firstMatch(errorStr + "\n" +
70 "(?:.*Heap address: .*\n)?" // Heap address: 0x00000000f8000000, size: 128 MB, Compressed Oops mode: 32-bit
71 + heapPattern);
72 if (result != null) {
73 return false;
74 }
75 return true;
76 }
77
78 static void checkHeap(OutputAnalyzer output, long expectedPageSize) throws Exception {
79 checkSize(output, expectedPageSize, "Heap: .*page_size=([^ ]+)");
80 }
81
82 static void testVM(long regionSize) throws Exception {
83 ProcessBuilder pb;
84 // Test with large page enabled.
85 pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
86 "-XX:G1HeapRegionSize=" + regionSize,
87 "-Xmx128m",
88 "-Xlog:pagesize,gc+heap+coops=debug",
89 "-XX:+UseLargePages",
90 "-version");
91
92 OutputAnalyzer output = new OutputAnalyzer(pb.start());
93 boolean largePageEnabled = checkLargePageEnabled(output);
94 checkHeap(output, largePageEnabled ? largePageSize : smallPageSize);
95 output.shouldHaveExitValue(0);
96
97 // Test with large page disabled.
98 pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
99 "-XX:G1HeapRegionSize=" + regionSize,
100 "-Xmx128m",
101 "-Xlog:pagesize,gc+heap+coops=debug",
102 "-XX:-UseLargePages",
103 "-version");
104
105 output = new OutputAnalyzer(pb.start());
106 checkHeap(output, smallPageSize);
107 output.shouldHaveExitValue(0);
108 }
109
110 public static void main(String[] args) throws Exception {
111 WhiteBox wb = WhiteBox.getWhiteBox();
112 smallPageSize = wb.getVMPageSize();
113 largePageSize = wb.getVMLargePageSize();
114
115 if (largePageSize == 0) {
116 throw new SkippedException("Large page support does not seem to be available on this platform.");
117 }
118 if (largePageSize == smallPageSize) {
119 throw new SkippedException("Large page support does not seem to be available on this platform."
120 + "Small and large page size are the same.");
121 }
122
123 // G1HeapRegionSize=1MB
124 testVM(1 * 1024 * 1024);
125
126 // G1HeapRegionSize=2MB
127 testVM(2 * 1024 * 1024);
128
129 // G1HeapRegionSize=8MB
130 testVM(8 * 1024 * 1024);
131 }
132
133 public static long parseMemoryString(String value) {
134 long multiplier = 1;
135
136 if (value.endsWith("B")) {
137 multiplier = 1;
138 } else if (value.endsWith("K")) {
139 multiplier = 1024;
140 } else if (value.endsWith("M")) {
141 multiplier = 1024 * 1024;
142 } else if (value.endsWith("G")) {
143 multiplier = 1024 * 1024 * 1024;
144 } else {
145 throw new IllegalArgumentException("Expected memory string '" + value + "'to end with either of: B, K, M, G");
146 }
147
148 long longValue = Long.parseUnsignedLong(value.substring(0, value.length() - 1));
149
150 return longValue * multiplier;
151 }
152 }