1 | /* Measure bzero functions. |
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 MIN_PAGE_SIZE 131072 |
26 | #include "bench-string.h" |
27 | |
28 | #include "json-lib.h" |
29 | |
30 | #ifdef DO_MEMSET |
31 | void *generic_memset (void *, int, size_t); |
32 | |
33 | typedef void *(*proto_t) (void *, int, size_t); |
34 | |
35 | IMPL (memset, 1) |
36 | IMPL (generic_memset, 0) |
37 | |
38 | #else |
39 | static void |
40 | memset_zero (void * s, size_t len) |
41 | { |
42 | memset (s, '\0', len); |
43 | } |
44 | |
45 | typedef void (*proto_t) (void *, size_t); |
46 | |
47 | IMPL (bzero, 1) |
48 | IMPL (memset_zero, 0) |
49 | #endif |
50 | |
51 | static void |
52 | do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s, size_t n) |
53 | { |
54 | size_t i, iters = INNER_LOOP_ITERS8; |
55 | timing_t start, stop, cur; |
56 | |
57 | TIMING_NOW (start); |
58 | for (i = 0; i < iters; ++i) |
59 | { |
60 | #ifdef DO_MEMSET |
61 | CALL (impl, s, 0, n); |
62 | #else |
63 | CALL (impl, s, n); |
64 | #endif |
65 | } |
66 | TIMING_NOW (stop); |
67 | |
68 | TIMING_DIFF (cur, start, stop); |
69 | |
70 | json_element_double (ctx: json_ctx, d: (double) cur / (double) iters); |
71 | } |
72 | |
73 | static void |
74 | do_test (json_ctx_t *json_ctx, size_t align, size_t len) |
75 | { |
76 | align &= 4095; |
77 | if ((align + len) * sizeof (CHAR) > page_size) |
78 | return; |
79 | |
80 | json_element_object_begin (ctx: json_ctx); |
81 | json_attr_uint (ctx: json_ctx, name: "length" , d: len); |
82 | json_attr_uint (ctx: json_ctx, name: "alignment" , d: align); |
83 | json_array_begin (ctx: json_ctx, name: "timings" ); |
84 | |
85 | FOR_EACH_IMPL (impl, 0) |
86 | { |
87 | do_one_test (json_ctx, impl, s: (CHAR *) (buf1) + align, n: len); |
88 | } |
89 | |
90 | json_array_end (ctx: json_ctx); |
91 | json_element_object_end (ctx: json_ctx); |
92 | } |
93 | |
94 | int |
95 | test_main (void) |
96 | { |
97 | json_ctx_t json_ctx; |
98 | size_t i; |
99 | |
100 | test_init (); |
101 | alloc_bufs (); |
102 | json_init (ctx: &json_ctx, indent_level: 0, stdout); |
103 | |
104 | json_document_begin (ctx: &json_ctx); |
105 | json_attr_string (ctx: &json_ctx, name: "timing_type" , TIMING_TYPE); |
106 | |
107 | json_attr_object_begin (ctx: &json_ctx, name: "functions" ); |
108 | json_attr_object_begin (ctx: &json_ctx, TEST_NAME); |
109 | json_attr_string (ctx: &json_ctx, name: "bench-variant" , s: "default" ); |
110 | |
111 | json_array_begin (ctx: &json_ctx, name: "ifuncs" ); |
112 | FOR_EACH_IMPL (impl, 0) |
113 | json_element_string (ctx: &json_ctx, s: impl->name); |
114 | json_array_end (ctx: &json_ctx); |
115 | |
116 | json_array_begin (ctx: &json_ctx, name: "results" ); |
117 | |
118 | for (i = 0; i < 18; ++i) |
119 | do_test (json_ctx: &json_ctx, align: 0, len: 1 << i); |
120 | for (i = 0; i < 64; ++i) |
121 | { |
122 | do_test (json_ctx: &json_ctx, align: i, len: i); |
123 | do_test (json_ctx: &json_ctx, align: 4096 - i, len: i); |
124 | do_test (json_ctx: &json_ctx, align: 4095, len: i); |
125 | if (i & (i - 1)) |
126 | do_test (json_ctx: &json_ctx, align: 0, len: i); |
127 | } |
128 | for (i = 32; i < 1024; i+=32) |
129 | { |
130 | do_test (json_ctx: &json_ctx, align: 0, len: i); |
131 | do_test (json_ctx: &json_ctx, align: i, len: i); |
132 | } |
133 | do_test (json_ctx: &json_ctx, align: 1, len: 14); |
134 | do_test (json_ctx: &json_ctx, align: 3, len: 1024); |
135 | do_test (json_ctx: &json_ctx, align: 4, len: 64); |
136 | do_test (json_ctx: &json_ctx, align: 2, len: 25); |
137 | |
138 | for (i = 33; i <= 256; i += 4) |
139 | { |
140 | do_test (json_ctx: &json_ctx, align: 0, len: 32 * i); |
141 | do_test (json_ctx: &json_ctx, align: i, len: 32 * i); |
142 | } |
143 | |
144 | json_array_end (ctx: &json_ctx); |
145 | json_attr_object_end (ctx: &json_ctx); |
146 | json_attr_object_end (ctx: &json_ctx); |
147 | json_document_end (ctx: &json_ctx); |
148 | |
149 | return ret; |
150 | } |
151 | |
152 | #include <support/test-driver.c> |
153 | |
154 | #ifdef DO_MEMSET |
155 | # define libc_hidden_builtin_def(X) |
156 | # define libc_hidden_def(X) |
157 | # define libc_hidden_weak(X) |
158 | # define weak_alias(X,Y) |
159 | # undef MEMSET |
160 | # define MEMSET generic_memset |
161 | # include <string/memset.c> |
162 | #endif |
163 | |