1 /*
2 * Copyright Amazon.com Inc. 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 * @summary Test that growth of old-gen triggers old-gen marking
28 * @requires vm.gc.Shenandoah
29 * @library /test/lib
30 * @run driver TestOldGrowthTriggers
31 */
32
33 import java.util.*;
34 import java.math.BigInteger;
35
36 import jdk.test.lib.Asserts;
37 import jdk.test.lib.process.ProcessTools;
38 import jdk.test.lib.process.OutputAnalyzer;
39
40 public class TestOldGrowthTriggers {
41
42 public static void makeOldAllocations() {
43 // Expect most of the BigInteger entries placed into array to be promoted, and most will eventually become garbage within old
44
45 final int array_size = 512 * 1024; // 512K entries
46 BigInteger array[] = new BigInteger[array_size];
47 Random r = new Random(46);
48
49 for (int i = 0; i < array_size; i++) {
50 array[i] = new BigInteger(128, r);
51 }
52
53 for (int refill_count = 0; refill_count < 192; refill_count++) {
54 // Each refill repopulates array_size randomly selected elements within array
55 for (int i = 0; i < array_size; i++) {
56 int replace_index = r.nextInt(array_size);
57 int derive_index = r.nextInt(array_size);
58 switch (i & 0x3) {
59 case 0:
60 // 50% chance of creating garbage
61 array[replace_index] = array[replace_index].max(array[derive_index]);
62 break;
63 case 1:
64 // 50% chance of creating garbage
65 array[replace_index] = array[replace_index].min(array[derive_index]);
66 break;
67 case 2:
68 // creates new old BigInteger, releases old BigInteger,
69 // may create ephemeral data while computing gcd
70 array[replace_index] = array[replace_index].gcd(array[derive_index]);
71 break;
72 case 3:
73 // creates new old BigInteger, releases old BigInteger
74 array[replace_index] = array[replace_index].multiply(array[derive_index]);
75 break;
76 }
77 if ((i & 0x3) == 0x3) {
78 } else {
79 }
80 }
81 }
82 }
83
84 public static void testOld(String... args) throws Exception {
85 String[] cmds = Arrays.copyOf(args, args.length + 2);
86 cmds[args.length] = TestOldGrowthTriggers.class.getName();
87 cmds[args.length + 1] = "test";
88 ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(cmds);
89 OutputAnalyzer output = new OutputAnalyzer(pb.start());
90 output.shouldHaveExitValue(0);
91 if (!output.getOutput().contains("Trigger (OLD): Old has overgrown")) {
92 throw new AssertionError("Generational mode: Should experience OLD triggers due to growth");
93 }
94 }
95
96 public static void main(String[] args) throws Exception {
97 if (args.length > 0 && args[0].equals("test")) {
98 makeOldAllocations();
99 return;
100 }
101
102 testOld("-Xlog:gc",
103 "-Xms256m",
104 "-Xmx256m",
105 "-XX:+UnlockDiagnosticVMOptions",
106 "-XX:+UnlockExperimentalVMOptions",
107 "-XX:+UseShenandoahGC",
108 "-XX:ShenandoahGCMode=generational",
109 "-XX:ShenandoahGuaranteedYoungGCInterval=0",
110 "-XX:ShenandoahGuaranteedOldGCInterval=0"
111 );
112 }
113 }