1 /*
2 * Copyright (c) 2018, 2021, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2018, 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/freeBlocks.hpp"
28 #include "memory/metaspace/metaspaceCommon.hpp"
29 #include "memory/metaspace/metaspaceSettings.hpp"
30 #include "memory/metaspace/virtualSpaceNode.hpp"
31 #include "utilities/align.hpp"
32 #include "utilities/debug.hpp"
33 #include "utilities/globalDefinitions.hpp"
34 #include "utilities/ostream.hpp"
35
36 namespace metaspace {
37
38 // Print a size, in words, scaled.
39 void print_scaled_words(outputStream* st, size_t word_size, size_t scale, int width) {
40 print_human_readable_size(st, word_size * sizeof(MetaWord), scale, width);
41 }
42
43 // Convenience helper: prints a size value and a percentage.
44 void print_scaled_words_and_percentage(outputStream* st, size_t word_size, size_t compare_word_size, size_t scale, int width) {
45 print_scaled_words(st, word_size, scale, width);
46 st->print(" (");
47 print_percentage(st, compare_word_size, word_size);
48 st->print(")");
49 }
50
51 static const char* display_unit_for_scale(size_t scale) {
52 const char* s = NULL;
53 switch(scale) {
54 case 1: s = "bytes"; break;
55 case BytesPerWord: s = "words"; break;
56 case K: s = "KB"; break;
57 case M: s = "MB"; break;
58 case G: s = "GB"; break;
59 default:
60 ShouldNotReachHere();
61 }
62 return s;
63 }
64
65 // Print a human readable size.
66 // byte_size: size, in bytes, to be printed.
67 // scale: one of 1 (byte-wise printing), sizeof(word) (word-size printing), K, M, G (scaled by KB, MB, GB respectively,
68 // or 0, which means the best scale is chosen dynamically.
69 // width: printing width.
70 void print_human_readable_size(outputStream* st, size_t byte_size, size_t scale, int width) {
71 if (scale == 0) {
72 // Dynamic mode. Choose scale for this value.
73 if (byte_size == 0) {
74 // Zero values are printed as bytes.
75 scale = 1;
76 } else {
77 if (byte_size >= G) {
78 scale = G;
79 } else if (byte_size >= M) {
80 scale = M;
81 } else if (byte_size >= K) {
82 scale = K;
83 } else {
84 scale = 1;
85 }
86 }
87 return print_human_readable_size(st, byte_size, scale, width);
88 }
89
90 #ifdef ASSERT
91 assert(scale == 1 || scale == BytesPerWord ||
92 scale == K || scale == M || scale == G, "Invalid scale");
93 // Special case: printing wordsize should only be done with word-sized values
94 if (scale == BytesPerWord) {
95 assert(byte_size % BytesPerWord == 0, "not word sized");
96 }
97 #endif
98
99 if (width == -1) {
100 if (scale == 1) {
101 st->print(SIZE_FORMAT " bytes", byte_size);
102 } else if (scale == BytesPerWord) {
103 st->print(SIZE_FORMAT " words", byte_size / BytesPerWord);
104 } else {
105 const char* display_unit = display_unit_for_scale(scale);
106 float display_value = (float) byte_size / scale;
107 // Prevent very small but non-null values showing up as 0.00.
108 if (byte_size > 0 && display_value < 0.01f) {
109 st->print("<0.01 %s", display_unit);
110 } else {
111 st->print("%.2f %s", display_value, display_unit);
112 }
113 }
114 } else {
115 if (scale == 1) {
116 st->print("%*" PRIuPTR " bytes", width, byte_size);
117 } else if (scale == BytesPerWord) {
118 st->print("%*" PRIuPTR " words", width, byte_size / BytesPerWord);
119 } else {
120 const char* display_unit = display_unit_for_scale(scale);
121 float display_value = (float) byte_size / scale;
122 // Since we use width to display a number with two trailing digits, increase it a bit.
123 width += 3;
124 // Prevent very small but non-null values showing up as 0.00.
125 if (byte_size > 0 && display_value < 0.01f) {
126 st->print("%*s %s", width, "<0.01", display_unit);
127 } else {
128 st->print("%*.2f %s", width, display_value, display_unit);
129 }
130 }
131 }
132 }
133
134 // Prints a percentage value. Values smaller than 1% but not 0 are displayed as "<1%", values
135 // larger than 99% but not 100% are displayed as ">100%".
136 void print_percentage(outputStream* st, size_t total, size_t part) {
137 if (total == 0) {
138 st->print(" ?%%");
139 } else if (part == 0) {
140 st->print(" 0%%");
141 } else if (part == total) {
142 st->print("100%%");
143 } else {
144 // Note: clearly print very-small-but-not-0% and very-large-but-not-100% percentages.
145 float p = ((float)part / total) * 100.0f;
146 if (p < 1.0f) {
147 st->print(" <1%%");
148 } else if (p > 99.0f){
149 st->print(">99%%");
150 } else {
151 st->print("%3.0f%%", p);
152 }
153 }
154 }
155
156 const char* loaders_plural(uintx num) {
157 return num == 1 ? "loader" : "loaders";
158 }
159
160 const char* classes_plural(uintx num) {
161 return num == 1 ? "class" : "classes";
162 }
163
164 void print_number_of_classes(outputStream* out, uintx classes, uintx classes_shared) {
165 out->print(UINTX_FORMAT " %s", classes, classes_plural(classes));
166 if (classes_shared > 0) {
167 out->print(" (" UINTX_FORMAT " shared)", classes_shared);
168 }
169 }
170
171 // Given a net allocation word size, return the raw word size we actually allocate.172 // Note: externally visible for gtests.173 //static174 size_t get_raw_word_size_for_requested_word_size(size_t word_size) {175 size_t byte_size = word_size * BytesPerWord;176 177 // Deallocated metablocks are kept in a binlist which limits their minimal178 // size to at least the size of a binlist item (2 words).179 byte_size = MAX2(byte_size, FreeBlocks::MinWordSize * BytesPerWord);180 181 // Metaspace allocations are aligned to word size.182 byte_size = align_up(byte_size, AllocationAlignmentByteSize);183 184 size_t raw_word_size = byte_size / BytesPerWord;185 assert(raw_word_size * BytesPerWord == byte_size, "Sanity");186 return raw_word_size;187 }188
189 } // namespace metaspace
190
--- EOF ---