1 /*
2 * Copyright (c) 2020, 2021, 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 #include "precompiled.hpp"
27 #include "memory/metaspace.hpp"
28 #include "memory/metaspaceUtils.hpp"
29 #include "unittest.hpp"
30
31 TEST_VM(metaspace, MetaspaceUtils_reserved) {
32 size_t reserved = MetaspaceUtils::reserved_bytes();
33 EXPECT_GT(reserved, 0UL);
34
35 size_t reserved_metadata = MetaspaceUtils::reserved_bytes(Metaspace::NonClassType);
36 EXPECT_GT(reserved_metadata, 0UL);
37 EXPECT_LE(reserved_metadata, reserved);
38 }
39
40 TEST_VM(metaspace, MetaspaceUtils_reserved_compressed_class_pointers) {
41 if (!UseCompressedClassPointers) {
42 return;
43 }
44 size_t reserved = MetaspaceUtils::reserved_bytes();
45 EXPECT_GT(reserved, 0UL);
46
47 size_t reserved_class = MetaspaceUtils::reserved_bytes(Metaspace::ClassType);
48 EXPECT_GT(reserved_class, 0UL);
49 EXPECT_LE(reserved_class, reserved);
50 }
51
52 TEST_VM(metaspace, MetaspaceUtils_committed) {
53 size_t committed = MetaspaceUtils::committed_bytes();
54 EXPECT_GT(committed, 0UL);
55
56 size_t reserved = MetaspaceUtils::reserved_bytes();
57 EXPECT_LE(committed, reserved);
58
59 size_t committed_metadata = MetaspaceUtils::committed_bytes(Metaspace::NonClassType);
60 EXPECT_GT(committed_metadata, 0UL);
61 EXPECT_LE(committed_metadata, committed);
62 }
63
64 TEST_VM(metaspace, MetaspaceUtils_committed_compressed_class_pointers) {
65 if (!UseCompressedClassPointers) {
66 return;
67 }
68 size_t committed = MetaspaceUtils::committed_bytes();
69 EXPECT_GT(committed, 0UL);
70
71 size_t committed_class = MetaspaceUtils::committed_bytes(Metaspace::ClassType);
72 EXPECT_GT(committed_class, 0UL);
73 EXPECT_LE(committed_class, committed);
74 }
75
76 TEST_VM(metaspace, MetaspaceUtils_non_compressed_class_pointers) {
77 if (UseCompressedClassPointers) {
78 return;
79 }
80
81 size_t committed_class = MetaspaceUtils::committed_bytes(Metaspace::ClassType);
82 EXPECT_EQ(committed_class, 0UL);
83
84 size_t used_class = MetaspaceUtils::used_bytes(Metaspace::ClassType);
85 EXPECT_EQ(used_class, 0UL);
86
87 size_t reserved_class = MetaspaceUtils::reserved_bytes(Metaspace::ClassType);
88 EXPECT_EQ(reserved_class, 0UL);
89 }
90
91 static void check_metaspace_stats_are_consistent(const MetaspaceStats& stats) {
92 EXPECT_LE(stats.committed(), stats.reserved());
93 EXPECT_LE(stats.used(), stats.committed());
94 }
95
96 static void check_metaspace_stats_are_not_null(const MetaspaceStats& stats) {
97 EXPECT_GT(stats.reserved(), 0UL);
98 EXPECT_GT(stats.committed(), 0UL);
99 EXPECT_GT(stats.used(), 0UL);
100 }
101
102 TEST_VM(MetaspaceUtils, MetaspaceUtils_get_statistics) {
103 MetaspaceCombinedStats combined_stats = MetaspaceUtils::get_combined_statistics();
104 check_metaspace_stats_are_not_null(combined_stats);
105 check_metaspace_stats_are_consistent(combined_stats);
106 check_metaspace_stats_are_not_null(combined_stats.non_class_space_stats());
107 check_metaspace_stats_are_consistent(combined_stats.non_class_space_stats());
108
109 if (UseCompressedClassPointers) {
110 check_metaspace_stats_are_not_null(combined_stats.class_space_stats());
111 check_metaspace_stats_are_consistent(combined_stats.class_space_stats());
112 } else {
113 // if we don't have a class space, combined stats should equal non-class stats
114 EXPECT_EQ(combined_stats.non_class_space_stats().reserved(), combined_stats.reserved());
115 EXPECT_EQ(combined_stats.non_class_space_stats().committed(), combined_stats.committed());
116 EXPECT_EQ(combined_stats.non_class_space_stats().used(), combined_stats.used());
117 }
118 }