1 /*
2 * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2020 SAP SE. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 /*
27 * This is a stress test for allocating from a single MetaspaceArena from
28 * multiple threads, optionally with reserve limit (mimicking the non-expandable CompressedClassSpace)
29 * or commit limit (mimimcking MaxMetaspaceSize).
30 *
31 * The test threads will start to allocate from the Arena, and occasionally deallocate.
32 * The threads run with a safety allocation max; if reached (or, if the underlying arena
33 * hits either commit or reserve limit, if given) they will switch to deallocation and then
34 * kind of float at the allocation ceiling, alternating between allocation and deallocation.
35 *
36 * We test with various flags, to exercise all 3 reclaim policies (none, balanced (default)
37 * and aggessive) as well as one run with allocation guards enabled.
38 *
39 * We also set MetaspaceVerifyInterval very low to trigger many verifications in debug vm.
40 *
41 */
42
43
44 /*
45 * @test id=debug
46 * @library /test/lib
47 * @modules java.base/jdk.internal.misc
48 * java.management
49 * @build sun.hotspot.WhiteBox
50 * @key randomness
51 * @requires (vm.debug == true)
52 *
53 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
54 *
55 * @run main/othervm/timeout=400 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:VerifyMetaspaceInterval=10 TestMetaspaceAllocationMT1
56 * @run main/othervm/timeout=400 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:VerifyMetaspaceInterval=10 -XX:MetaspaceReclaimPolicy=none TestMetaspaceAllocationMT1
57 * @run main/othervm/timeout=400 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:VerifyMetaspaceInterval=10 -XX:MetaspaceReclaimPolicy=aggressive TestMetaspaceAllocationMT1
58 * @run main/othervm/timeout=400 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:VerifyMetaspaceInterval=10 -XX:+MetaspaceGuardAllocations TestMetaspaceAllocationMT1
59 *
60 */
61
62 /*
63 * @test id=ndebug
64 * @library /test/lib
65 * @modules java.base/jdk.internal.misc
66 * java.management
67 * @build sun.hotspot.WhiteBox
68 * @key randomness
69 * @requires (vm.debug == false)
70 *
71 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
72 *
73 * @run main/othervm/timeout=400 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI TestMetaspaceAllocationMT1
74 * @run main/othervm/timeout=400 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:MetaspaceReclaimPolicy=none TestMetaspaceAllocationMT1
75 * @run main/othervm/timeout=400 -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:MetaspaceReclaimPolicy=aggressive TestMetaspaceAllocationMT1
76 */
77
78 public class TestMetaspaceAllocationMT1 {
79
80 public static void main(String[] args) throws Exception {
81
82 final long testAllocationCeiling = 1024 * 1024 * 8; // 8m words = 64M on 64bit
83 final int numThreads = 4;
84 final int seconds = 10;
85
86 for (int i = 0; i < 3; i ++) {
87
88 long commitLimit = (i == 1) ? 1024 * 256 : 0;
89
90 // Note: reserve limit must be a multiple of Metaspace::reserve_alignment_words()
91 // (512 K)
92 long reserveLimit = (i == 2) ? 1024 * 512 : 0;
93
94 System.out.println("#### Test: ");
95 System.out.println("#### testAllocationCeiling: " + testAllocationCeiling);
96 System.out.println("#### numThreads: " + numThreads);
97 System.out.println("#### seconds: " + seconds);
98 System.out.println("#### commitLimit: " + commitLimit);
99 System.out.println("#### reserveLimit: " + reserveLimit);
100 System.out.println("#### ReclaimPolicy: " + Settings.settings().reclaimPolicy);
101 System.out.println("#### guards: " + Settings.settings().usesAllocationGuards);
102
103 MetaspaceTestContext context = new MetaspaceTestContext(commitLimit, reserveLimit);
104 MetaspaceTestOneArenaManyThreads test = new MetaspaceTestOneArenaManyThreads(context, testAllocationCeiling, numThreads, seconds);
105
106 try {
107 test.runTest();
108 } catch (RuntimeException e) {
109 System.out.println(e);
110 context.printToTTY();
111 throw e;
112 }
113
114 context.destroy();
115
116 System.out.println("#### Done. ####");
117 System.out.println("###############");
118
119 }
120
121 }
122
123 }