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36bb8edf | 1 | /* Measure memset function throughput with large data sizes. |
04277e02 | 2 | Copyright (C) 2017-2019 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 | |
17 | <http://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 | #endif /* WIDE */ | |
eb332f9f | 25 | #define START_SIZE 128 |
36bb8edf SP |
26 | #define MIN_PAGE_SIZE (getpagesize () + 32 * 1024 * 1024) |
27 | #define TIMEOUT (20 * 60) | |
28 | #include "bench-string.h" | |
29 | ||
30 | #ifndef WIDE | |
36bb8edf | 31 | # define SIMPLE_MEMSET simple_memset |
36bb8edf | 32 | #else |
36bb8edf | 33 | # define SIMPLE_MEMSET simple_wmemset |
36bb8edf SP |
34 | #endif /* WIDE */ |
35 | ||
36 | #include <assert.h> | |
37 | #include "json-lib.h" | |
38 | ||
39 | ||
40 | typedef CHAR *(*proto_t) (CHAR *, int, size_t); | |
41 | ||
42 | CHAR * | |
43 | inhibit_loop_to_libcall | |
44 | SIMPLE_MEMSET (CHAR *s, int c, size_t n) | |
45 | { | |
46 | CHAR *r = s, *end = s + n; | |
47 | while (r < end) | |
48 | *r++ = c; | |
49 | return s; | |
50 | } | |
51 | ||
52 | IMPL (SIMPLE_MEMSET, 1) | |
53 | ||
54 | static void | |
55 | do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s, CHAR *s_end, | |
56 | int c __attribute ((unused)), size_t n) | |
57 | { | |
58 | size_t i, iters = MIN_PAGE_SIZE / n; | |
59 | timing_t start, stop, cur; | |
60 | ||
61 | TIMING_NOW (start); | |
4d7632ff | 62 | for (i = 0; i < iters && s <= s_end; s_end -= n, i++) |
36bb8edf SP |
63 | CALL (impl, s, c, n); |
64 | TIMING_NOW (stop); | |
65 | ||
66 | TIMING_DIFF (cur, start, stop); | |
67 | ||
68 | /* Get time taken per function call. */ | |
4d7632ff | 69 | json_element_double (json_ctx, (double) cur / i); |
36bb8edf SP |
70 | } |
71 | ||
72 | static void | |
73 | do_test (json_ctx_t *json_ctx, int c, size_t len) | |
74 | { | |
75 | json_element_object_begin (json_ctx); | |
76 | json_attr_uint (json_ctx, "length", len); | |
77 | json_attr_uint (json_ctx, "char", c); | |
78 | json_array_begin (json_ctx, "timings"); | |
79 | ||
80 | FOR_EACH_IMPL (impl, 0) | |
81 | { | |
82 | do_one_test (json_ctx, impl, (CHAR *) buf1, | |
83 | (CHAR *) buf1 + MIN_PAGE_SIZE - len, c, len); | |
014efdd7 | 84 | alloc_bufs (); |
36bb8edf SP |
85 | } |
86 | ||
87 | json_array_end (json_ctx); | |
88 | json_element_object_end (json_ctx); | |
89 | } | |
90 | ||
91 | int | |
92 | test_main (void) | |
93 | { | |
94 | json_ctx_t json_ctx; | |
95 | size_t i; | |
96 | ||
97 | test_init (); | |
98 | ||
99 | json_init (&json_ctx, 0, stdout); | |
100 | ||
101 | json_document_begin (&json_ctx); | |
102 | json_attr_string (&json_ctx, "timing_type", TIMING_TYPE); | |
103 | ||
104 | json_attr_object_begin (&json_ctx, "functions"); | |
105 | json_attr_object_begin (&json_ctx, TEST_NAME); | |
106 | json_attr_string (&json_ctx, "bench-variant", "walk"); | |
107 | ||
108 | json_array_begin (&json_ctx, "ifuncs"); | |
109 | FOR_EACH_IMPL (impl, 0) | |
110 | json_element_string (&json_ctx, impl->name); | |
111 | json_array_end (&json_ctx); | |
112 | ||
113 | json_array_begin (&json_ctx, "results"); | |
114 | for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1) | |
115 | /* Test length alignments from 0-16 bytes. */ | |
116 | for (int j = 0; j < i && j < 16; j++) | |
117 | do_test (&json_ctx, 65, i + j); | |
118 | ||
119 | for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1) | |
120 | for (int j = 0; j < i && j < 16; j++) | |
121 | do_test (&json_ctx, 0, i + j); | |
122 | ||
123 | json_array_end (&json_ctx); | |
124 | json_attr_object_end (&json_ctx); | |
125 | json_attr_object_end (&json_ctx); | |
126 | json_document_end (&json_ctx); | |
127 | ||
128 | return ret; | |
129 | } | |
130 | ||
131 | #include <support/test-driver.c> |