1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
/* Measure memset function throughput with large data sizes.
Copyright (C) 2017-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#define TEST_MAIN
#ifdef DO_MEMSET
# define TEST_NAME "memset"
#else
# define TEST_NAME "bzero"
#endif
#define START_SIZE 128
#define MIN_PAGE_SIZE (getpagesize () + 32 * 1024 * 1024)
#define TIMEOUT (20 * 60)
#include "bench-string.h"
#include "json-lib.h"
#ifdef DO_MEMSET
void *generic_memset (void *, int, size_t);
typedef void *(*proto_t) (void *, int, size_t);
IMPL (memset, 1)
IMPL (generic_memset, 0)
#else
static void
memset_zero (void * s, size_t len)
{
memset (s, '\0', len);
}
typedef void (*proto_t) (void *, size_t);
IMPL (bzero, 1)
IMPL (memset_zero, 0)
#endif
static void
do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s, CHAR *s_end,
size_t n)
{
size_t i, iters = MIN_PAGE_SIZE / n;
timing_t start, stop, cur;
TIMING_NOW (start);
for (i = 0; i < iters && s <= s_end; s_end -= n, i++)
#ifdef DO_MEMSET
CALL (impl, s, 0, n);
#else
CALL (impl, s, n);
#endif
TIMING_NOW (stop);
TIMING_DIFF (cur, start, stop);
/* Get time taken per function call. */
json_element_double (json_ctx, (double) cur / i);
}
static void
do_test (json_ctx_t *json_ctx, size_t len)
{
json_element_object_begin (json_ctx);
json_attr_uint (json_ctx, "length", len);
json_array_begin (json_ctx, "timings");
FOR_EACH_IMPL (impl, 0)
{
do_one_test (json_ctx, impl, (CHAR *) buf1,
(CHAR *) buf1 + MIN_PAGE_SIZE - len, len);
alloc_bufs ();
}
json_array_end (json_ctx);
json_element_object_end (json_ctx);
}
int
test_main (void)
{
json_ctx_t json_ctx;
size_t i;
test_init ();
json_init (&json_ctx, 0, stdout);
json_document_begin (&json_ctx);
json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
json_attr_object_begin (&json_ctx, "functions");
json_attr_object_begin (&json_ctx, TEST_NAME);
json_attr_string (&json_ctx, "bench-variant", "walk");
json_array_begin (&json_ctx, "ifuncs");
FOR_EACH_IMPL (impl, 0)
json_element_string (&json_ctx, impl->name);
json_array_end (&json_ctx);
json_array_begin (&json_ctx, "results");
for (i = 1; i <= 64; i++)
do_test (&json_ctx, i);
for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1)
{
do_test (&json_ctx, i);
do_test (&json_ctx, i + 1);
}
json_array_end (&json_ctx);
json_attr_object_end (&json_ctx);
json_attr_object_end (&json_ctx);
json_document_end (&json_ctx);
return ret;
}
#include <support/test-driver.c>
#ifdef DO_MEMSET
# define libc_hidden_builtin_def(X)
# define libc_hidden_def(X)
# define libc_hidden_weak(X)
# define weak_alias(X,Y)
# undef MEMSET
# define MEMSET generic_memset
# include <string/memset.c>
#endif
|
