1 | /* Measure bzero functions with large data sizes. |
2 | Copyright (C) 2022-2024 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 | #ifdef DO_MEMSET |
21 | # define TEST_NAME "memset" |
22 | #else |
23 | # define TEST_NAME "bzero" |
24 | #endif |
25 | #define START_SIZE (128 * 1024) |
26 | #define MIN_PAGE_SIZE (getpagesize () + 64 * 1024 * 1024) |
27 | #define TIMEOUT (20 * 60) |
28 | #include "bench-string.h" |
29 | |
30 | #include "json-lib.h" |
31 | |
32 | #ifdef DO_MEMSET |
33 | void *generic_memset (void *, int, size_t); |
34 | |
35 | typedef void *(*proto_t) (void *, int, size_t); |
36 | |
37 | IMPL (memset, 1) |
38 | IMPL (generic_memset, 0) |
39 | #else |
40 | static void |
41 | memset_zero (void * s, size_t len) |
42 | { |
43 | memset (s, '\0', len); |
44 | } |
45 | |
46 | typedef void (*proto_t) (void *, size_t); |
47 | |
48 | IMPL (bzero, 1) |
49 | IMPL (memset_zero, 0) |
50 | #endif |
51 | |
52 | static void |
53 | do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s, size_t n) |
54 | { |
55 | size_t i, iters = 16; |
56 | timing_t start, stop, cur; |
57 | |
58 | TIMING_NOW (start); |
59 | for (i = 0; i < iters; ++i) |
60 | { |
61 | #ifdef DO_MEMSET |
62 | CALL (impl, s, 0, n); |
63 | #else |
64 | CALL (impl, s, n); |
65 | #endif |
66 | } |
67 | TIMING_NOW (stop); |
68 | |
69 | TIMING_DIFF (cur, start, stop); |
70 | |
71 | json_element_double (ctx: json_ctx, d: (double) cur / (double) iters); |
72 | } |
73 | |
74 | static void |
75 | do_test (json_ctx_t *json_ctx, size_t align, size_t len) |
76 | { |
77 | align &= 63; |
78 | if ((align + len) * sizeof (CHAR) > page_size) |
79 | return; |
80 | |
81 | json_element_object_begin (ctx: json_ctx); |
82 | json_attr_uint (ctx: json_ctx, name: "length" , d: len); |
83 | json_attr_uint (ctx: json_ctx, name: "alignment" , d: align); |
84 | json_array_begin (ctx: json_ctx, name: "timings" ); |
85 | |
86 | FOR_EACH_IMPL (impl, 0) |
87 | { |
88 | do_one_test (json_ctx, impl, s: (CHAR *) (buf1) + align, n: len); |
89 | alloc_bufs (); |
90 | } |
91 | |
92 | json_array_end (ctx: json_ctx); |
93 | json_element_object_end (ctx: json_ctx); |
94 | } |
95 | |
96 | int |
97 | test_main (void) |
98 | { |
99 | json_ctx_t json_ctx; |
100 | size_t i; |
101 | |
102 | test_init (); |
103 | |
104 | json_init (ctx: &json_ctx, indent_level: 0, stdout); |
105 | |
106 | json_document_begin (ctx: &json_ctx); |
107 | json_attr_string (ctx: &json_ctx, name: "timing_type" , TIMING_TYPE); |
108 | |
109 | json_attr_object_begin (ctx: &json_ctx, name: "functions" ); |
110 | json_attr_object_begin (ctx: &json_ctx, TEST_NAME); |
111 | json_attr_string (ctx: &json_ctx, name: "bench-variant" , s: "large" ); |
112 | |
113 | json_array_begin (ctx: &json_ctx, name: "ifuncs" ); |
114 | FOR_EACH_IMPL (impl, 0) |
115 | json_element_string (ctx: &json_ctx, s: impl->name); |
116 | json_array_end (ctx: &json_ctx); |
117 | |
118 | json_array_begin (ctx: &json_ctx, name: "results" ); |
119 | |
120 | for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1) |
121 | { |
122 | do_test (json_ctx: &json_ctx, align: 0, len: i); |
123 | do_test (json_ctx: &json_ctx, align: 3, len: i); |
124 | } |
125 | |
126 | json_array_end (ctx: &json_ctx); |
127 | json_attr_object_end (ctx: &json_ctx); |
128 | json_attr_object_end (ctx: &json_ctx); |
129 | json_document_end (ctx: &json_ctx); |
130 | |
131 | return ret; |
132 | } |
133 | |
134 | #include <support/test-driver.c> |
135 | |
136 | #ifdef DO_MEMSET |
137 | # define libc_hidden_builtin_def(X) |
138 | # define libc_hidden_def(X) |
139 | # define libc_hidden_weak(X) |
140 | # define weak_alias(X,Y) |
141 | # undef MEMSET |
142 | # define MEMSET generic_memset |
143 | # include <string/memset.c> |
144 | #endif |
145 | |