1 | /* Measure memmove functions. |
2 | Copyright (C) 2013-2022 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 "memmove" |
21 | #include "bench-string.h" |
22 | #include "json-lib.h" |
23 | |
24 | void *generic_memmove (void *, const void *, size_t); |
25 | |
26 | typedef void *(*proto_t) (void *, const void *, size_t); |
27 | |
28 | IMPL (memmove, 1) |
29 | IMPL (generic_memmove, 0) |
30 | |
31 | static void |
32 | do_one_test (json_ctx_t *json_ctx, impl_t *impl, char *dst, char *src, |
33 | size_t len) |
34 | { |
35 | size_t i, iters = INNER_LOOP_ITERS; |
36 | timing_t start, stop, cur; |
37 | for (i = 0; i < iters / 64; ++i) |
38 | { |
39 | CALL (impl, dst, src, len); |
40 | } |
41 | TIMING_NOW (start); |
42 | for (i = 0; i < iters; ++i) |
43 | { |
44 | CALL (impl, dst, src, len); |
45 | } |
46 | TIMING_NOW (stop); |
47 | |
48 | TIMING_DIFF (cur, start, stop); |
49 | |
50 | json_element_double (ctx: json_ctx, d: (double) cur / (double) iters); |
51 | } |
52 | |
53 | static void |
54 | do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len) |
55 | { |
56 | size_t i, j; |
57 | char *s1, *s2; |
58 | |
59 | align1 &= (getpagesize () - 1); |
60 | if (align1 + len >= page_size) |
61 | return; |
62 | |
63 | align2 &= (getpagesize () - 1); |
64 | if (align2 + len >= page_size) |
65 | return; |
66 | |
67 | s1 = (char *) (buf2 + align1); |
68 | s2 = (char *) (buf2 + align2); |
69 | |
70 | for (i = 0, j = 1; i < len; i++, j += 23) |
71 | s1[i] = j; |
72 | |
73 | json_element_object_begin (ctx: json_ctx); |
74 | json_attr_uint (ctx: json_ctx, name: "length" , d: (double) len); |
75 | json_attr_uint (ctx: json_ctx, name: "align1" , d: (double) align1); |
76 | json_attr_uint (ctx: json_ctx, name: "align2" , d: (double) align2); |
77 | json_array_begin (ctx: json_ctx, name: "timings" ); |
78 | |
79 | FOR_EACH_IMPL (impl, 0) |
80 | do_one_test (json_ctx, impl, dst: s2, src: s1, len); |
81 | |
82 | json_array_end (ctx: json_ctx); |
83 | json_element_object_end (ctx: json_ctx); |
84 | } |
85 | |
86 | static int |
87 | test_main (void) |
88 | { |
89 | json_ctx_t json_ctx; |
90 | size_t i; |
91 | size_t half_page = getpagesize () / 2; |
92 | |
93 | test_init (); |
94 | |
95 | json_init (ctx: &json_ctx, indent_level: 0, stdout); |
96 | |
97 | json_document_begin (ctx: &json_ctx); |
98 | json_attr_string (ctx: &json_ctx, name: "timing_type" , TIMING_TYPE); |
99 | |
100 | json_attr_object_begin (ctx: &json_ctx, name: "functions" ); |
101 | json_attr_object_begin (ctx: &json_ctx, name: "memmove" ); |
102 | json_attr_string (ctx: &json_ctx, name: "bench-variant" , s: "default" ); |
103 | |
104 | json_array_begin (ctx: &json_ctx, name: "ifuncs" ); |
105 | |
106 | FOR_EACH_IMPL (impl, 0) |
107 | json_element_string (ctx: &json_ctx, s: impl->name); |
108 | json_array_end (ctx: &json_ctx); |
109 | |
110 | json_array_begin (ctx: &json_ctx, name: "results" ); |
111 | for (i = 0; i < 14; ++i) |
112 | { |
113 | do_test (json_ctx: &json_ctx, align1: 0, align2: 32, len: 1 << i); |
114 | do_test (json_ctx: &json_ctx, align1: 32, align2: 0, len: 1 << i); |
115 | do_test (json_ctx: &json_ctx, align1: 0, align2: i, len: 1 << i); |
116 | do_test (json_ctx: &json_ctx, align1: i, align2: 0, len: 1 << i); |
117 | } |
118 | |
119 | for (i = 0; i < 32; ++i) |
120 | { |
121 | do_test (json_ctx: &json_ctx, align1: 0, align2: 32, len: i); |
122 | do_test (json_ctx: &json_ctx, align1: 32, align2: 0, len: i); |
123 | do_test (json_ctx: &json_ctx, align1: 0, align2: i, len: i); |
124 | do_test (json_ctx: &json_ctx, align1: i, align2: 0, len: i); |
125 | } |
126 | |
127 | for (i = 3; i < 32; ++i) |
128 | { |
129 | if ((i & (i - 1)) == 0) |
130 | continue; |
131 | do_test (json_ctx: &json_ctx, align1: 0, align2: 32, len: 16 * i); |
132 | do_test (json_ctx: &json_ctx, align1: 32, align2: 0, len: 16 * i); |
133 | do_test (json_ctx: &json_ctx, align1: 0, align2: i, len: 16 * i); |
134 | do_test (json_ctx: &json_ctx, align1: i, align2: 0, len: 16 * i); |
135 | } |
136 | |
137 | for (i = 32; i < 64; ++i) |
138 | { |
139 | do_test (json_ctx: &json_ctx, align1: 0, align2: 0, len: 32 * i); |
140 | do_test (json_ctx: &json_ctx, align1: i, align2: 0, len: 32 * i); |
141 | do_test (json_ctx: &json_ctx, align1: 0, align2: i, len: 32 * i); |
142 | do_test (json_ctx: &json_ctx, align1: i, align2: i, len: 32 * i); |
143 | } |
144 | |
145 | for (i = 0; i <= 48; ++i) |
146 | { |
147 | do_test (json_ctx: &json_ctx, align1: 0, align2: 0, len: 2048 + 64 * i); |
148 | do_test (json_ctx: &json_ctx, align1: i, align2: 0, len: 2048 + 64 * i); |
149 | do_test (json_ctx: &json_ctx, align1: 0, align2: i, len: 2048 + 64 * i); |
150 | do_test (json_ctx: &json_ctx, align1: i, align2: i, len: 2048 + 64 * i); |
151 | do_test (json_ctx: &json_ctx, align1: half_page, align2: 0, len: 2048 + 64 * i); |
152 | do_test (json_ctx: &json_ctx, align1: 0, align2: half_page, len: 2048 + 64 * i); |
153 | do_test (json_ctx: &json_ctx, align1: half_page + i, align2: 0, len: 2048 + 64 * i); |
154 | do_test (json_ctx: &json_ctx, align1: i, align2: half_page, len: 2048 + 64 * i); |
155 | do_test (json_ctx: &json_ctx, align1: half_page, align2: i, len: 2048 + 64 * i); |
156 | do_test (json_ctx: &json_ctx, align1: 0, align2: half_page + i, len: 2048 + 64 * i); |
157 | do_test (json_ctx: &json_ctx, align1: half_page + i, align2: i, len: 2048 + 64 * i); |
158 | do_test (json_ctx: &json_ctx, align1: i, align2: half_page + i, len: 2048 + 64 * i); |
159 | } |
160 | |
161 | json_array_end (ctx: &json_ctx); |
162 | json_attr_object_end (ctx: &json_ctx); |
163 | json_attr_object_end (ctx: &json_ctx); |
164 | json_document_end (ctx: &json_ctx); |
165 | |
166 | return ret; |
167 | } |
168 | |
169 | #include <support/test-driver.c> |
170 | |
171 | #define libc_hidden_builtin_def(X) |
172 | #undef MEMMOVE |
173 | #define MEMMOVE generic_memmove |
174 | #include <string/memmove.c> |
175 | #include <string/wordcopy.c> |
176 | |