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dc98eeeb | 1 | /* Measure bzero functions with large data sizes. |
6d7e8eda | 2 | Copyright (C) 2022-2023 Free Software Foundation, Inc. |
dc98eeeb L |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <https://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #define TEST_MAIN | |
cf975913 L |
20 | #ifdef DO_MEMSET |
21 | # define TEST_NAME "memset" | |
22 | #else | |
23 | # define TEST_NAME "bzero" | |
24 | #endif | |
dc98eeeb L |
25 | #define START_SIZE (128 * 1024) |
26 | #define MIN_PAGE_SIZE (getpagesize () + 64 * 1024 * 1024) | |
27 | #define TIMEOUT (20 * 60) | |
28 | #include "bench-string.h" | |
29 | ||
30 | #include "json-lib.h" | |
31 | ||
cf975913 L |
32 | #ifdef DO_MEMSET |
33 | void *generic_memset (void *, int, size_t); | |
34 | ||
35 | typedef void *(*proto_t) (void *, int, size_t); | |
36 | ||
37 | IMPL (memset, 1) | |
38 | IMPL (generic_memset, 0) | |
39 | #else | |
dc98eeeb L |
40 | static void |
41 | memset_zero (void * s, size_t len) | |
42 | { | |
43 | memset (s, '\0', len); | |
44 | } | |
45 | ||
46 | typedef void (*proto_t) (void *, size_t); | |
47 | ||
48 | IMPL (bzero, 1) | |
49 | IMPL (memset_zero, 0) | |
cf975913 | 50 | #endif |
dc98eeeb L |
51 | |
52 | static void | |
53 | do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s, size_t n) | |
54 | { | |
55 | size_t i, iters = 16; | |
56 | timing_t start, stop, cur; | |
57 | ||
58 | TIMING_NOW (start); | |
59 | for (i = 0; i < iters; ++i) | |
60 | { | |
cf975913 L |
61 | #ifdef DO_MEMSET |
62 | CALL (impl, s, 0, n); | |
63 | #else | |
dc98eeeb | 64 | CALL (impl, s, n); |
cf975913 | 65 | #endif |
dc98eeeb L |
66 | } |
67 | TIMING_NOW (stop); | |
68 | ||
69 | TIMING_DIFF (cur, start, stop); | |
70 | ||
71 | json_element_double (json_ctx, (double) cur / (double) iters); | |
72 | } | |
73 | ||
74 | static void | |
75 | do_test (json_ctx_t *json_ctx, size_t align, size_t len) | |
76 | { | |
77 | align &= 63; | |
78 | if ((align + len) * sizeof (CHAR) > page_size) | |
79 | return; | |
80 | ||
81 | json_element_object_begin (json_ctx); | |
82 | json_attr_uint (json_ctx, "length", len); | |
83 | json_attr_uint (json_ctx, "alignment", align); | |
84 | json_array_begin (json_ctx, "timings"); | |
85 | ||
86 | FOR_EACH_IMPL (impl, 0) | |
87 | { | |
88 | do_one_test (json_ctx, impl, (CHAR *) (buf1) + align, len); | |
89 | alloc_bufs (); | |
90 | } | |
91 | ||
92 | json_array_end (json_ctx); | |
93 | json_element_object_end (json_ctx); | |
94 | } | |
95 | ||
96 | int | |
97 | test_main (void) | |
98 | { | |
99 | json_ctx_t json_ctx; | |
100 | size_t i; | |
101 | ||
102 | test_init (); | |
103 | ||
104 | json_init (&json_ctx, 0, stdout); | |
105 | ||
106 | json_document_begin (&json_ctx); | |
107 | json_attr_string (&json_ctx, "timing_type", TIMING_TYPE); | |
108 | ||
109 | json_attr_object_begin (&json_ctx, "functions"); | |
110 | json_attr_object_begin (&json_ctx, TEST_NAME); | |
111 | json_attr_string (&json_ctx, "bench-variant", "large"); | |
112 | ||
113 | json_array_begin (&json_ctx, "ifuncs"); | |
114 | FOR_EACH_IMPL (impl, 0) | |
115 | json_element_string (&json_ctx, impl->name); | |
116 | json_array_end (&json_ctx); | |
117 | ||
118 | json_array_begin (&json_ctx, "results"); | |
119 | ||
120 | for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1) | |
121 | { | |
122 | do_test (&json_ctx, 0, i); | |
123 | do_test (&json_ctx, 3, i); | |
124 | } | |
125 | ||
126 | json_array_end (&json_ctx); | |
127 | json_attr_object_end (&json_ctx); | |
128 | json_attr_object_end (&json_ctx); | |
129 | json_document_end (&json_ctx); | |
130 | ||
131 | return ret; | |
132 | } | |
133 | ||
134 | #include <support/test-driver.c> | |
cf975913 L |
135 | |
136 | #ifdef DO_MEMSET | |
137 | # define libc_hidden_builtin_def(X) | |
138 | # define libc_hidden_def(X) | |
139 | # define libc_hidden_weak(X) | |
140 | # define weak_alias(X,Y) | |
141 | # undef MEMSET | |
142 | # define MEMSET generic_memset | |
143 | # include <string/memset.c> | |
144 | #endif |