1 | /* Measure memset function throughput with large data sizes. |
2 | Copyright (C) 2017-2022 Free Software Foundation, Inc. |
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 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #define TEST_MAIN |
20 | #define TEST_NAME "memset" |
21 | #define START_SIZE 128 |
22 | #define MIN_PAGE_SIZE (getpagesize () + 32 * 1024 * 1024) |
23 | #define TIMEOUT (20 * 60) |
24 | #include "bench-string.h" |
25 | |
26 | #include "json-lib.h" |
27 | |
28 | void *generic_memset (void *, int, size_t); |
29 | typedef void *(*proto_t) (void *, int, size_t); |
30 | |
31 | IMPL (MEMSET, 1) |
32 | IMPL (generic_memset, 0) |
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); |
42 | for (i = 0; i < iters && s <= s_end; s_end -= n, i++) |
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. */ |
49 | json_element_double (ctx: json_ctx, d: (double) cur / i); |
50 | } |
51 | |
52 | static void |
53 | do_test (json_ctx_t *json_ctx, int c, size_t len) |
54 | { |
55 | json_element_object_begin (ctx: json_ctx); |
56 | json_attr_uint (ctx: json_ctx, name: "length" , d: len); |
57 | json_attr_uint (ctx: json_ctx, name: "char" , d: c); |
58 | json_array_begin (ctx: json_ctx, name: "timings" ); |
59 | |
60 | FOR_EACH_IMPL (impl, 0) |
61 | { |
62 | do_one_test (json_ctx, impl, s: (CHAR *) buf1, |
63 | s_end: (CHAR *) buf1 + MIN_PAGE_SIZE - len, c, n: len); |
64 | alloc_bufs (); |
65 | } |
66 | |
67 | json_array_end (ctx: json_ctx); |
68 | json_element_object_end (ctx: 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 (ctx: &json_ctx, indent_level: 0, stdout); |
80 | |
81 | json_document_begin (ctx: &json_ctx); |
82 | json_attr_string (ctx: &json_ctx, name: "timing_type" , TIMING_TYPE); |
83 | |
84 | json_attr_object_begin (ctx: &json_ctx, name: "functions" ); |
85 | json_attr_object_begin (ctx: &json_ctx, TEST_NAME); |
86 | json_attr_string (ctx: &json_ctx, name: "bench-variant" , s: "walk" ); |
87 | |
88 | json_array_begin (ctx: &json_ctx, name: "ifuncs" ); |
89 | FOR_EACH_IMPL (impl, 0) |
90 | json_element_string (ctx: &json_ctx, s: impl->name); |
91 | json_array_end (ctx: &json_ctx); |
92 | |
93 | json_array_begin (ctx: &json_ctx, name: "results" ); |
94 | for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1) |
95 | { |
96 | do_test (json_ctx: &json_ctx, c: 65, len: i); |
97 | do_test (json_ctx: &json_ctx, c: 65, len: i + 1); |
98 | } |
99 | |
100 | for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1) |
101 | { |
102 | do_test (json_ctx: &json_ctx, c: 0, len: i); |
103 | do_test (json_ctx: &json_ctx, c: 0, len: i + 1); |
104 | } |
105 | |
106 | json_array_end (ctx: &json_ctx); |
107 | json_attr_object_end (ctx: &json_ctx); |
108 | json_attr_object_end (ctx: &json_ctx); |
109 | json_document_end (ctx: &json_ctx); |
110 | |
111 | return ret; |
112 | } |
113 | |
114 | #include <support/test-driver.c> |
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> |
123 | |