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1 | /* Measure memcpy functions. | |
2 | Copyright (C) 2013-2021 Free Software Foundation, Inc. | |
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 | #ifndef MEMCPY_RESULT | |
20 | # define MEMCPY_RESULT(dst, len) dst | |
21 | # define MIN_PAGE_SIZE 131072 | |
22 | # define TEST_MAIN | |
23 | # define TEST_NAME "memcpy" | |
24 | # include "bench-string.h" | |
25 | ||
26 | void *generic_memcpy (void *, const void *, size_t); | |
27 | ||
28 | IMPL (memcpy, 1) | |
29 | IMPL (generic_memcpy, 0) | |
30 | ||
31 | #endif | |
32 | ||
33 | # include "json-lib.h" | |
34 | ||
35 | typedef void *(*proto_t) (void *, const void *, size_t); | |
36 | ||
37 | static void | |
38 | do_one_test (json_ctx_t *json_ctx, impl_t *impl, char *dst, const char *src, | |
39 | size_t len) | |
40 | { | |
41 | size_t i, iters = INNER_LOOP_ITERS; | |
42 | timing_t start, stop, cur; | |
43 | ||
44 | TIMING_NOW (start); | |
45 | for (i = 0; i < iters; ++i) | |
46 | { | |
47 | CALL (impl, dst, src, len); | |
48 | } | |
49 | TIMING_NOW (stop); | |
50 | ||
51 | TIMING_DIFF (cur, start, stop); | |
52 | ||
53 | json_element_double (json_ctx, (double) cur / (double) iters); | |
54 | } | |
55 | ||
56 | static void | |
57 | do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len) | |
58 | { | |
59 | size_t i, j; | |
60 | char *s1, *s2; | |
61 | ||
62 | align1 &= 63; | |
63 | if (align1 + len >= page_size) | |
64 | return; | |
65 | ||
66 | align2 &= 63; | |
67 | if (align2 + len >= page_size) | |
68 | return; | |
69 | ||
70 | s1 = (char *) (buf1 + align1); | |
71 | s2 = (char *) (buf2 + align2); | |
72 | ||
73 | for (i = 0, j = 1; i < len; i++, j += 23) | |
74 | s1[i] = j; | |
75 | ||
76 | json_element_object_begin (json_ctx); | |
77 | json_attr_uint (json_ctx, "length", (double) len); | |
78 | json_attr_uint (json_ctx, "align1", (double) align1); | |
79 | json_attr_uint (json_ctx, "align2", (double) align2); | |
80 | json_array_begin (json_ctx, "timings"); | |
81 | ||
82 | FOR_EACH_IMPL (impl, 0) | |
83 | do_one_test (json_ctx, impl, s2, s1, len); | |
84 | ||
85 | json_array_end (json_ctx); | |
86 | json_element_object_end (json_ctx); | |
87 | } | |
88 | ||
89 | int | |
90 | test_main (void) | |
91 | { | |
92 | json_ctx_t json_ctx; | |
93 | size_t i; | |
94 | ||
95 | test_init (); | |
96 | ||
97 | json_init (&json_ctx, 0, stdout); | |
98 | ||
99 | json_document_begin (&json_ctx); | |
100 | json_attr_string (&json_ctx, "timing_type", TIMING_TYPE); | |
101 | ||
102 | json_attr_object_begin (&json_ctx, "functions"); | |
103 | json_attr_object_begin (&json_ctx, TEST_NAME); | |
104 | json_attr_string (&json_ctx, "bench-variant", "default"); | |
105 | ||
106 | json_array_begin (&json_ctx, "ifuncs"); | |
107 | FOR_EACH_IMPL (impl, 0) | |
108 | json_element_string (&json_ctx, impl->name); | |
109 | json_array_end (&json_ctx); | |
110 | ||
111 | json_array_begin (&json_ctx, "results"); | |
112 | for (i = 0; i < 18; ++i) | |
113 | { | |
114 | do_test (&json_ctx, 0, 0, 1 << i); | |
115 | do_test (&json_ctx, i, 0, 1 << i); | |
116 | do_test (&json_ctx, 0, i, 1 << i); | |
117 | do_test (&json_ctx, i, i, 1 << i); | |
118 | } | |
119 | ||
120 | for (i = 0; i < 32; ++i) | |
121 | { | |
122 | do_test (&json_ctx, 0, 0, i); | |
123 | do_test (&json_ctx, i, 0, i); | |
124 | do_test (&json_ctx, 0, i, i); | |
125 | do_test (&json_ctx, i, i, i); | |
126 | } | |
127 | ||
128 | for (i = 3; i < 32; ++i) | |
129 | { | |
130 | if ((i & (i - 1)) == 0) | |
131 | continue; | |
132 | do_test (&json_ctx, 0, 0, 16 * i); | |
133 | do_test (&json_ctx, i, 0, 16 * i); | |
134 | do_test (&json_ctx, 0, i, 16 * i); | |
135 | do_test (&json_ctx, i, i, 16 * i); | |
136 | } | |
137 | ||
138 | for (i = 32; i < 64; ++i) | |
139 | { | |
140 | do_test (&json_ctx, 0, 0, 32 * i); | |
141 | do_test (&json_ctx, i, 0, 32 * i); | |
142 | do_test (&json_ctx, 0, i, 32 * i); | |
143 | do_test (&json_ctx, i, i, 32 * i); | |
144 | } | |
145 | ||
146 | do_test (&json_ctx, 0, 0, getpagesize ()); | |
147 | ||
148 | json_array_end (&json_ctx); | |
149 | json_attr_object_end (&json_ctx); | |
150 | json_attr_object_end (&json_ctx); | |
151 | json_document_end (&json_ctx); | |
152 | ||
153 | return ret; | |
154 | } | |
155 | ||
156 | #include <support/test-driver.c> | |
157 | ||
158 | #define libc_hidden_builtin_def(X) | |
159 | #undef MEMCPY | |
160 | #define MEMCPY generic_memcpy | |
161 | #include <string/memcpy.c> | |
162 | #include <string/wordcopy.c> |