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36bb8edf | 1 | /* Measure memset function throughput with large data sizes. |
6d7e8eda | 2 | Copyright (C) 2017-2023 Free Software Foundation, Inc. |
36bb8edf SP |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
36bb8edf SP |
18 | |
19 | #define TEST_MAIN | |
3c05dd79 | 20 | #define TEST_NAME "memset" |
eb332f9f | 21 | #define START_SIZE 128 |
36bb8edf SP |
22 | #define MIN_PAGE_SIZE (getpagesize () + 32 * 1024 * 1024) |
23 | #define TIMEOUT (20 * 60) | |
24 | #include "bench-string.h" | |
25 | ||
36bb8edf SP |
26 | #include "json-lib.h" |
27 | ||
3c05dd79 WD |
28 | void *generic_memset (void *, int, size_t); |
29 | typedef void *(*proto_t) (void *, int, size_t); | |
36bb8edf | 30 | |
3c05dd79 WD |
31 | IMPL (MEMSET, 1) |
32 | IMPL (generic_memset, 0) | |
36bb8edf SP |
33 | |
34 | static void | |
35 | do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s, CHAR *s_end, | |
36 | int c __attribute ((unused)), size_t n) | |
37 | { | |
38 | size_t i, iters = MIN_PAGE_SIZE / n; | |
39 | timing_t start, stop, cur; | |
40 | ||
41 | TIMING_NOW (start); | |
4d7632ff | 42 | for (i = 0; i < iters && s <= s_end; s_end -= n, i++) |
36bb8edf SP |
43 | CALL (impl, s, c, n); |
44 | TIMING_NOW (stop); | |
45 | ||
46 | TIMING_DIFF (cur, start, stop); | |
47 | ||
48 | /* Get time taken per function call. */ | |
4d7632ff | 49 | json_element_double (json_ctx, (double) cur / i); |
36bb8edf SP |
50 | } |
51 | ||
52 | static void | |
53 | do_test (json_ctx_t *json_ctx, int c, size_t len) | |
54 | { | |
55 | json_element_object_begin (json_ctx); | |
56 | json_attr_uint (json_ctx, "length", len); | |
57 | json_attr_uint (json_ctx, "char", c); | |
58 | json_array_begin (json_ctx, "timings"); | |
59 | ||
60 | FOR_EACH_IMPL (impl, 0) | |
61 | { | |
62 | do_one_test (json_ctx, impl, (CHAR *) buf1, | |
63 | (CHAR *) buf1 + MIN_PAGE_SIZE - len, c, len); | |
014efdd7 | 64 | alloc_bufs (); |
36bb8edf SP |
65 | } |
66 | ||
67 | json_array_end (json_ctx); | |
68 | json_element_object_end (json_ctx); | |
69 | } | |
70 | ||
71 | int | |
72 | test_main (void) | |
73 | { | |
74 | json_ctx_t json_ctx; | |
75 | size_t i; | |
76 | ||
77 | test_init (); | |
78 | ||
79 | json_init (&json_ctx, 0, stdout); | |
80 | ||
81 | json_document_begin (&json_ctx); | |
82 | json_attr_string (&json_ctx, "timing_type", TIMING_TYPE); | |
83 | ||
84 | json_attr_object_begin (&json_ctx, "functions"); | |
85 | json_attr_object_begin (&json_ctx, TEST_NAME); | |
86 | json_attr_string (&json_ctx, "bench-variant", "walk"); | |
87 | ||
88 | json_array_begin (&json_ctx, "ifuncs"); | |
89 | FOR_EACH_IMPL (impl, 0) | |
90 | json_element_string (&json_ctx, impl->name); | |
91 | json_array_end (&json_ctx); | |
92 | ||
93 | json_array_begin (&json_ctx, "results"); | |
94 | for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1) | |
46ae0732 WD |
95 | { |
96 | do_test (&json_ctx, 65, i); | |
97 | do_test (&json_ctx, 65, i + 1); | |
98 | } | |
36bb8edf SP |
99 | |
100 | for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1) | |
46ae0732 WD |
101 | { |
102 | do_test (&json_ctx, 0, i); | |
103 | do_test (&json_ctx, 0, i + 1); | |
104 | } | |
36bb8edf SP |
105 | |
106 | json_array_end (&json_ctx); | |
107 | json_attr_object_end (&json_ctx); | |
108 | json_attr_object_end (&json_ctx); | |
109 | json_document_end (&json_ctx); | |
110 | ||
111 | return ret; | |
112 | } | |
113 | ||
114 | #include <support/test-driver.c> | |
3c05dd79 WD |
115 | |
116 | #define libc_hidden_builtin_def(X) | |
117 | #define libc_hidden_def(X) | |
118 | #define libc_hidden_weak(X) | |
119 | #define weak_alias(X,Y) | |
120 | #undef MEMSET | |
121 | #define MEMSET generic_memset | |
122 | #include <string/memset.c> |