1 /*
2 * Copyright (c) 2012, 2016, 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 */
35 import jdk.test.lib.process.ProcessTools;
36
37 public class TestHumongousAllocInitialMark {
38 // Heap sizes < 224 MB are increased to 224 MB if vm_page_size == 64K to
39 // fulfill alignment constraints.
40 private static final int heapSize = 224; // MB
41 private static final int heapRegionSize = 1; // MB
42 private static final int initiatingHeapOccupancyPercent = 50; // %
43
44 public static void main(String[] args) throws Exception {
45 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
46 "-XX:+UseG1GC",
47 "-Xms" + heapSize + "m",
48 "-Xmx" + heapSize + "m",
49 "-XX:G1HeapRegionSize=" + heapRegionSize + "m",
50 "-XX:InitiatingHeapOccupancyPercent=" + initiatingHeapOccupancyPercent,
51 "-Xlog:gc",
52 HumongousObjectAllocator.class.getName());
53
54 OutputAnalyzer output = new OutputAnalyzer(pb.start());
55 output.shouldContain("Pause Initial Mark (G1 Humongous Allocation)");
56 output.shouldNotContain("Full GC");
57 output.shouldHaveExitValue(0);
58 }
59
60 static class HumongousObjectAllocator {
61 private static byte[] dummy;
62
63 public static void main(String [] args) throws Exception {
64 // Make object size 75% of region size
65 final int humongousObjectSize =
66 (int)(heapRegionSize * 1024 * 1024 * 0.75);
67
68 // Number of objects to allocate to go above IHOP
69 final int humongousObjectAllocations =
70 (int)((heapSize * initiatingHeapOccupancyPercent / 100.0) / heapRegionSize) + 1;
71
72 // Allocate
73 for (int i = 1; i <= humongousObjectAllocations; i++) {
74 System.out.println("Allocating humongous object " + i + "/" + humongousObjectAllocations +
75 " of size " + humongousObjectSize + " bytes");
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1 /*
2 * Copyright (c) 2012, 2018, 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 */
35 import jdk.test.lib.process.ProcessTools;
36
37 public class TestHumongousAllocInitialMark {
38 // Heap sizes < 224 MB are increased to 224 MB if vm_page_size == 64K to
39 // fulfill alignment constraints.
40 private static final int heapSize = 224; // MB
41 private static final int heapRegionSize = 1; // MB
42 private static final int initiatingHeapOccupancyPercent = 50; // %
43
44 public static void main(String[] args) throws Exception {
45 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
46 "-XX:+UseG1GC",
47 "-Xms" + heapSize + "m",
48 "-Xmx" + heapSize + "m",
49 "-XX:G1HeapRegionSize=" + heapRegionSize + "m",
50 "-XX:InitiatingHeapOccupancyPercent=" + initiatingHeapOccupancyPercent,
51 "-Xlog:gc",
52 HumongousObjectAllocator.class.getName());
53
54 OutputAnalyzer output = new OutputAnalyzer(pb.start());
55 output.shouldContain("Pause Young (Concurrent Start) (G1 Humongous Allocation)");
56 output.shouldNotContain("Full GC");
57 output.shouldHaveExitValue(0);
58 }
59
60 static class HumongousObjectAllocator {
61 private static byte[] dummy;
62
63 public static void main(String [] args) throws Exception {
64 // Make object size 75% of region size
65 final int humongousObjectSize =
66 (int)(heapRegionSize * 1024 * 1024 * 0.75);
67
68 // Number of objects to allocate to go above IHOP
69 final int humongousObjectAllocations =
70 (int)((heapSize * initiatingHeapOccupancyPercent / 100.0) / heapRegionSize) + 1;
71
72 // Allocate
73 for (int i = 1; i <= humongousObjectAllocations; i++) {
74 System.out.println("Allocating humongous object " + i + "/" + humongousObjectAllocations +
75 " of size " + humongousObjectSize + " bytes");
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