1 /* Measure memset functions.
2 Copyright (C) 2013-2023 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 #define TEST_MAIN
20 #ifndef WIDE
21 # define TEST_NAME "memset"
22 #else
23 # define TEST_NAME "wmemset"
24 # define generic_memset generic_wmemset
25 #endif /* WIDE */
26 #define MIN_PAGE_SIZE 131072
27 #include "bench-string.h"
28
29 #include "json-lib.h"
30
31 #ifdef WIDE
32 CHAR *generic_wmemset (CHAR *, CHAR, size_t);
33 #else
34 void *generic_memset (void *, int, size_t);
35 #endif
36
37 typedef void *(*proto_t) (void *, int, size_t);
38
39 IMPL (MEMSET, 1)
40 IMPL (generic_memset, 0)
41
42 static void
43 do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s,
44 int c __attribute ((unused)), size_t n)
45 {
46 size_t i, iters = INNER_LOOP_ITERS;
47 timing_t start, stop, cur;
48
49 TIMING_NOW (start);
50 for (i = 0; i < iters; ++i)
51 {
52 CALL (impl, s, c, n);
53 }
54 TIMING_NOW (stop);
55
56 TIMING_DIFF (cur, start, stop);
57
58 json_element_double (json_ctx, (double) cur / (double) iters);
59 }
60
61 static void
62 do_test (json_ctx_t *json_ctx, size_t align, int c, size_t len)
63 {
64 align &= 4095;
65 if ((align + len) * sizeof (CHAR) > page_size)
66 return;
67
68 json_element_object_begin (json_ctx);
69 json_attr_uint (json_ctx, "length", len);
70 json_attr_uint (json_ctx, "alignment", align);
71 json_attr_int (json_ctx, "char", c);
72 json_array_begin (json_ctx, "timings");
73
74 FOR_EACH_IMPL (impl, 0)
75 {
76 do_one_test (json_ctx, impl, (CHAR *) (buf1) + align, c, len);
77 }
78
79 json_array_end (json_ctx);
80 json_element_object_end (json_ctx);
81 }
82
83 int
84 test_main (void)
85 {
86 json_ctx_t json_ctx;
87 size_t i;
88 int c = 0;
89
90
91 test_init ();
92 alloc_bufs ();
93 json_init (&json_ctx, 0, stdout);
94
95 json_document_begin (&json_ctx);
96 json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
97
98 json_attr_object_begin (&json_ctx, "functions");
99 json_attr_object_begin (&json_ctx, TEST_NAME);
100 json_attr_string (&json_ctx, "bench-variant", "default");
101
102 json_array_begin (&json_ctx, "ifuncs");
103 FOR_EACH_IMPL (impl, 0)
104 json_element_string (&json_ctx, impl->name);
105 json_array_end (&json_ctx);
106
107 json_array_begin (&json_ctx, "results");
108
109 for (c = -65; c <= 130; c += 65)
110 {
111 for (i = 0; i < 18; ++i)
112 do_test (&json_ctx, 0, c, 1 << i);
113 for (i = 0; i < 64; ++i)
114 {
115 do_test (&json_ctx, i, c, i);
116 do_test (&json_ctx, 4096 - i, c, i);
117 do_test (&json_ctx, 4095, c, i);
118 if (i & (i - 1))
119 do_test (&json_ctx, 0, c, i);
120 }
121 for (i = 32; i < 1024; i+=32)
122 {
123 do_test (&json_ctx, 0, c, i);
124 do_test (&json_ctx, i, c, i);
125 }
126 do_test (&json_ctx, 1, c, 14);
127 do_test (&json_ctx, 3, c, 1024);
128 do_test (&json_ctx, 4, c, 64);
129 do_test (&json_ctx, 2, c, 25);
130 }
131 for (i = 33; i <= 256; i += 4)
132 {
133 do_test (&json_ctx, 0, c, 32 * i);
134 do_test (&json_ctx, i, c, 32 * i);
135 }
136
137 json_array_end (&json_ctx);
138 json_attr_object_end (&json_ctx);
139 json_attr_object_end (&json_ctx);
140 json_document_end (&json_ctx);
141
142 return ret;
143 }
144
145 #include <support/test-driver.c>
146
147 #define libc_hidden_builtin_def(X)
148 #define libc_hidden_def(X)
149 #define libc_hidden_weak(X)
150 #define weak_alias(X,Y)
151 #ifndef WIDE
152 # undef MEMSET
153 # define MEMSET generic_memset
154 # include <string/memset.c>
155 #else
156 # define WMEMSET generic_wmemset
157 # include <wcsmbs/wmemset.c>
158 #endif