1 /* Measure memchr functions.
2 Copyright (C) 2013-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
22 # define SMALL_CHAR 127
24 # define SMALL_CHAR 1273
27 #ifndef USE_AS_MEMRCHR
30 # define TEST_NAME "memchr"
32 # define TEST_NAME "wmemchr"
34 # include "bench-string.h"
36 typedef void *(*proto_t
) (const void *, int, size_t);
39 generic_memchr (const void *, int, size_t);
44 IMPL (generic_memchr
, 0)
47 #endif /* !USE_AS_MEMRCHR */
51 do_one_test (json_ctx_t
*json_ctx
, impl_t
*impl
, const CHAR
*s
, int c
,
54 size_t i
, iters
= INNER_LOOP_ITERS8
/ 2;
55 timing_t start
, stop
, cur
;
58 for (i
= 0; i
< iters
; ++i
)
64 TIMING_DIFF (cur
, start
, stop
);
66 json_element_double (json_ctx
, (double) cur
/ (double) iters
);
70 do_test (json_ctx_t
*json_ctx
, size_t align
, size_t pos
, size_t len
,
71 int seek_char
, int invert_pos
)
75 align
&= getpagesize () - 1;
76 if ((align
+ len
) * sizeof (CHAR
) >= page_size
)
79 CHAR
*buf
= (CHAR
*) (buf1
);
81 for (i
= 0; i
< len
; ++i
)
83 buf
[align
+ i
] = 1 + 23 * i
% SMALL_CHAR
;
84 if (buf
[align
+ i
] == seek_char
)
85 buf
[align
+ i
] = seek_char
+ 1;
92 buf
[align
+ len
- pos
] = seek_char
;
94 buf
[align
+ pos
] = seek_char
;
95 buf
[align
+ len
] = -seek_char
;
99 buf
[align
+ len
] = seek_char
;
102 json_element_object_begin (json_ctx
);
103 json_attr_uint (json_ctx
, "align", align
);
104 json_attr_uint (json_ctx
, "pos", pos
);
105 json_attr_uint (json_ctx
, "len", len
);
106 json_attr_uint (json_ctx
, "seek_char", seek_char
);
107 json_attr_uint (json_ctx
, "invert_pos", invert_pos
);
109 json_array_begin (json_ctx
, "timings");
111 FOR_EACH_IMPL (impl
, 0)
112 do_one_test (json_ctx
, impl
, (CHAR
*) (buf
+ align
), seek_char
, len
);
114 json_array_end (json_ctx
);
115 json_element_object_end (json_ctx
);
121 size_t i
, j
, al
, al_max
;
126 json_init (&json_ctx
, 0, stdout
);
128 json_document_begin (&json_ctx
);
129 json_attr_string (&json_ctx
, "timing_type", TIMING_TYPE
);
131 json_attr_object_begin (&json_ctx
, "functions");
132 json_attr_object_begin (&json_ctx
, TEST_NAME
);
133 json_attr_string (&json_ctx
, "bench-variant", "");
135 json_array_begin (&json_ctx
, "ifuncs");
136 FOR_EACH_IMPL (impl
, 0)
137 json_element_string (&json_ctx
, impl
->name
);
138 json_array_end (&json_ctx
);
140 json_array_begin (&json_ctx
, "results");
143 #ifdef USE_AS_MEMRCHR
144 al_max
= getpagesize () / 2;
147 for (repeats
= 0; repeats
< 2; ++repeats
)
149 for (al
= 0; al
<= al_max
; al
+= getpagesize () / 2)
151 for (i
= 1; i
< 8; ++i
)
153 do_test (&json_ctx
, al
, 16 << i
, 2048, 23, repeats
);
154 do_test (&json_ctx
, al
+ i
, 64, 256, 23, repeats
);
155 do_test (&json_ctx
, al
, 16 << i
, 2048, 0, repeats
);
156 do_test (&json_ctx
, al
+ i
, 64, 256, 0, repeats
);
158 do_test (&json_ctx
, al
+ getpagesize () - 15, 64, 256, 0,
160 #ifdef USE_AS_MEMRCHR
161 /* Also test the position close to the beginning for memrchr. */
162 do_test (&json_ctx
, al
, i
, 256, 23, repeats
);
163 do_test (&json_ctx
, al
, i
, 256, 0, repeats
);
164 do_test (&json_ctx
, al
+ i
, i
, 256, 23, repeats
);
165 do_test (&json_ctx
, al
+ i
, i
, 256, 0, repeats
);
168 for (i
= 1; i
< 8; ++i
)
170 do_test (&json_ctx
, al
+ i
, i
<< 5, 192, 23, repeats
);
171 do_test (&json_ctx
, al
+ i
, i
<< 5, 192, 0, repeats
);
172 do_test (&json_ctx
, al
+ i
, i
<< 5, 256, 23, repeats
);
173 do_test (&json_ctx
, al
+ i
, i
<< 5, 256, 0, repeats
);
174 do_test (&json_ctx
, al
+ i
, i
<< 5, 512, 23, repeats
);
175 do_test (&json_ctx
, al
+ i
, i
<< 5, 512, 0, repeats
);
177 do_test (&json_ctx
, al
+ getpagesize () - 15, i
<< 5, 256, 23,
182 for (i
= 1; i
< 32; ++i
)
184 do_test (&json_ctx
, 0, i
, i
+ 1, 23, repeats
);
185 do_test (&json_ctx
, 0, i
, i
+ 1, 0, repeats
);
186 do_test (&json_ctx
, i
, i
, i
+ 1, 23, repeats
);
187 do_test (&json_ctx
, i
, i
, i
+ 1, 0, repeats
);
188 do_test (&json_ctx
, 0, i
, i
- 1, 23, repeats
);
189 do_test (&json_ctx
, 0, i
, i
- 1, 0, repeats
);
190 do_test (&json_ctx
, i
, i
, i
- 1, 23, repeats
);
191 do_test (&json_ctx
, i
, i
, i
- 1, 0, repeats
);
193 do_test (&json_ctx
, getpagesize () / 2, i
, i
+ 1, 23, repeats
);
194 do_test (&json_ctx
, getpagesize () / 2, i
, i
+ 1, 0, repeats
);
195 do_test (&json_ctx
, getpagesize () / 2 + i
, i
, i
+ 1, 23, repeats
);
196 do_test (&json_ctx
, getpagesize () / 2 + i
, i
, i
+ 1, 0, repeats
);
197 do_test (&json_ctx
, getpagesize () / 2, i
, i
- 1, 23, repeats
);
198 do_test (&json_ctx
, getpagesize () / 2, i
, i
- 1, 0, repeats
);
199 do_test (&json_ctx
, getpagesize () / 2 + i
, i
, i
- 1, 23, repeats
);
200 do_test (&json_ctx
, getpagesize () / 2 + i
, i
, i
- 1, 0, repeats
);
202 do_test (&json_ctx
, getpagesize () - 15, i
, i
- 1, 23, repeats
);
203 do_test (&json_ctx
, getpagesize () - 15, i
, i
- 1, 0, repeats
);
205 do_test (&json_ctx
, getpagesize () - 15, i
, i
+ 1, 23, repeats
);
206 do_test (&json_ctx
, getpagesize () - 15, i
, i
+ 1, 0, repeats
);
208 #ifdef USE_AS_MEMRCHR
209 do_test (&json_ctx
, 0, 1, i
+ 1, 23, repeats
);
210 do_test (&json_ctx
, 0, 2, i
+ 1, 0, repeats
);
213 for (al
= 0; al
<= al_max
; al
+= getpagesize () / 2)
215 for (i
= (16 / sizeof (CHAR
)); i
<= (8192 / sizeof (CHAR
)); i
+= i
)
217 for (j
= 0; j
<= (384 / sizeof (CHAR
));
218 j
+= (32 / sizeof (CHAR
)))
220 do_test (&json_ctx
, al
, i
+ j
, i
, 23, repeats
);
221 do_test (&json_ctx
, al
, i
, i
+ j
, 23, repeats
);
224 do_test (&json_ctx
, al
, i
- j
, i
, 23, repeats
);
225 do_test (&json_ctx
, al
, i
, i
- j
, 23, repeats
);
231 #ifndef USE_AS_MEMRCHR
236 json_array_end (&json_ctx
);
237 json_attr_object_end (&json_ctx
);
238 json_attr_object_end (&json_ctx
);
239 json_document_end (&json_ctx
);
244 #include <support/test-driver.c>
247 # ifndef USE_AS_MEMRCHR
249 # define MEMCHR generic_memchr
250 # include <string/memchr.c>
253 # define MEMRCHR generic_memrchr
254 # include <string/memrchr.c>