1 /*
2 * Copyright (c) 2018, 2019, 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
25 #ifndef SHARE_MEMORY_METASPACE_METASPACECOMMON_HPP
26 #define SHARE_MEMORY_METASPACE_METASPACECOMMON_HPP
27
28 #include "utilities/align.hpp"
29 #include "utilities/debug.hpp"
30 #include "utilities/globalDefinitions.hpp"
31
32 class outputStream;
33
34 namespace metaspace {
35
36
37 // Print a size, in words, scaled.
38 void print_scaled_words(outputStream* st, size_t word_size, size_t scale = 0, int width = -1);
39
40 // Convenience helper: prints a size value and a percentage.
41 void print_scaled_words_and_percentage(outputStream* st, size_t word_size, size_t compare_word_size, size_t scale = 0, int width = -1);
42
43 // Print a human readable size.
44 // byte_size: size, in bytes, to be printed.
45 // scale: one of 1 (byte-wise printing), sizeof(word) (word-size printing), K, M, G (scaled by KB, MB, GB respectively,
46 // or 0, which means the best scale is choosen dynamically.
47 // width: printing width.
48 void print_human_readable_size(outputStream* st, size_t byte_size, size_t scale = 0, int width = -1);
49
50 // Prints a percentage value. Values smaller than 1% but not 0 are displayed as "<1%", values
51 // larger than 99% but not 100% are displayed as ">100%".
52 void print_percentage(outputStream* st, size_t total, size_t part);
53
54
55 #define assert_is_aligned(value, alignment) \
56 assert(is_aligned((value), (alignment)), \
57 SIZE_FORMAT_HEX " is not aligned to " \
58 SIZE_FORMAT, (size_t)(uintptr_t)value, (alignment))
59
60 // Internal statistics.
61 #ifdef ASSERT
62 struct internal_statistics_t {
63 // Number of allocations.
64 uintx num_allocs;
65 // Number of times a ClassLoaderMetaspace was born...
66 uintx num_metaspace_births;
67 // ... and died.
68 uintx num_metaspace_deaths;
69 // Number of times VirtualSpaceListNodes were created...
70 uintx num_vsnodes_created;
71 // ... and purged.
72 uintx num_vsnodes_purged;
73 // Number of times we expanded the committed section of the space.
74 uintx num_committed_space_expanded;
75 // Number of deallocations
76 uintx num_deallocs;
77 // Number of deallocations triggered from outside ("real" deallocations).
78 uintx num_external_deallocs;
79 // Number of times an allocation was satisfied from deallocated blocks.
80 uintx num_allocs_from_deallocated_blocks;
81 // Number of times a chunk was added to the freelist
82 uintx num_chunks_added_to_freelist;
83 // Number of times a chunk was removed from the freelist
84 uintx num_chunks_removed_from_freelist;
85 // Number of chunk merges
86 uintx num_chunk_merges;
87 // Number of chunk splits
88 uintx num_chunk_splits;
89 };
90 extern internal_statistics_t g_internal_statistics;
91 #endif
92
93 // Pretty printing helpers
94 const char* classes_plural(uintx num);
95 const char* loaders_plural(uintx num);
96 void print_number_of_classes(outputStream* out, uintx classes, uintx classes_shared);
97
98 } // namespace metaspace
99
100 #endif // SHARE_MEMORY_METASPACE_METASPACECOMMON_HPP