math: Reverse include order in <math-type-macros-*.h>
[glibc.git] / benchtests / bench-memset-walk.c
blob4dcb1529cfe86d6d1734fdf5fe6456d395f2f778
1 /* Measure memset function throughput with large data sizes.
2 Copyright (C) 2017-2018 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 <http://www.gnu.org/licenses/>. */
19 #define TEST_MAIN
20 #ifndef WIDE
21 # define TEST_NAME "memset"
22 #else
23 # define TEST_NAME "wmemset"
24 #endif /* WIDE */
25 #define START_SIZE 128
26 #define MIN_PAGE_SIZE (getpagesize () + 32 * 1024 * 1024)
27 #define TIMEOUT (20 * 60)
28 #include "bench-string.h"
30 #ifndef WIDE
31 # define MEMSET memset
32 # define CHAR char
33 # define SIMPLE_MEMSET simple_memset
34 # define MEMCMP memcmp
35 #else
36 # include <wchar.h>
37 # define MEMSET wmemset
38 # define CHAR wchar_t
39 # define SIMPLE_MEMSET simple_wmemset
40 # define MEMCMP wmemcmp
41 #endif /* WIDE */
43 #include <assert.h>
44 #include "json-lib.h"
47 typedef CHAR *(*proto_t) (CHAR *, int, size_t);
49 CHAR *
50 inhibit_loop_to_libcall
51 SIMPLE_MEMSET (CHAR *s, int c, size_t n)
53 CHAR *r = s, *end = s + n;
54 while (r < end)
55 *r++ = c;
56 return s;
59 IMPL (SIMPLE_MEMSET, 1)
61 static void
62 do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s, CHAR *s_end,
63 int c __attribute ((unused)), size_t n)
65 size_t i, iters = MIN_PAGE_SIZE / n;
66 timing_t start, stop, cur;
68 TIMING_NOW (start);
69 for (i = 0; i < iters && s <= s_end; s_end -= n, i++)
70 CALL (impl, s, c, n);
71 TIMING_NOW (stop);
73 TIMING_DIFF (cur, start, stop);
75 /* Get time taken per function call. */
76 json_element_double (json_ctx, (double) cur / i);
79 static void
80 do_test (json_ctx_t *json_ctx, int c, size_t len)
82 json_element_object_begin (json_ctx);
83 json_attr_uint (json_ctx, "length", len);
84 json_attr_uint (json_ctx, "char", c);
85 json_array_begin (json_ctx, "timings");
87 FOR_EACH_IMPL (impl, 0)
89 do_one_test (json_ctx, impl, (CHAR *) buf1,
90 (CHAR *) buf1 + MIN_PAGE_SIZE - len, c, len);
91 realloc_bufs ();
94 json_array_end (json_ctx);
95 json_element_object_end (json_ctx);
98 int
99 test_main (void)
101 json_ctx_t json_ctx;
102 size_t i;
104 test_init ();
106 json_init (&json_ctx, 0, stdout);
108 json_document_begin (&json_ctx);
109 json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
111 json_attr_object_begin (&json_ctx, "functions");
112 json_attr_object_begin (&json_ctx, TEST_NAME);
113 json_attr_string (&json_ctx, "bench-variant", "walk");
115 json_array_begin (&json_ctx, "ifuncs");
116 FOR_EACH_IMPL (impl, 0)
117 json_element_string (&json_ctx, impl->name);
118 json_array_end (&json_ctx);
120 json_array_begin (&json_ctx, "results");
121 for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1)
122 /* Test length alignments from 0-16 bytes. */
123 for (int j = 0; j < i && j < 16; j++)
124 do_test (&json_ctx, 65, i + j);
126 for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1)
127 for (int j = 0; j < i && j < 16; j++)
128 do_test (&json_ctx, 0, i + j);
130 json_array_end (&json_ctx);
131 json_attr_object_end (&json_ctx);
132 json_attr_object_end (&json_ctx);
133 json_document_end (&json_ctx);
135 return ret;
138 #include <support/test-driver.c>