1 | /* Measure strlen functions. |
2 | Copyright (C) 2013-2024 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 | #ifndef WIDE |
21 | # define TEST_NAME "strnlen" |
22 | #else |
23 | # define TEST_NAME "wcsnlen" |
24 | # define generic_strnlen generic_wcsnlen |
25 | #endif /* WIDE */ |
26 | #include "bench-string.h" |
27 | #include "json-lib.h" |
28 | |
29 | #define BIG_CHAR MAX_CHAR |
30 | |
31 | #ifndef WIDE |
32 | # define MIDDLE_CHAR 127 |
33 | #else |
34 | # define MIDDLE_CHAR 1121 |
35 | #endif /* WIDE */ |
36 | |
37 | typedef size_t (*proto_t) (const CHAR *, size_t); |
38 | size_t generic_strnlen (const CHAR *, size_t); |
39 | |
40 | IMPL (STRNLEN, 1) |
41 | IMPL (generic_strnlen, 0) |
42 | |
43 | static void |
44 | do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s, size_t maxlen, |
45 | size_t exp_len) |
46 | { |
47 | size_t len = CALL (impl, s, maxlen), i, iters = INNER_LOOP_ITERS; |
48 | timing_t start, stop, cur; |
49 | |
50 | if (len != exp_len) |
51 | { |
52 | error (status: 0, errnum: 0, format: "Wrong result in function %s %zd %zd" , impl->name, len, |
53 | exp_len); |
54 | ret = 1; |
55 | return; |
56 | } |
57 | /* Warmup. */ |
58 | for (i = 0; i < iters / 16; ++i) |
59 | { |
60 | CALL (impl, s, maxlen); |
61 | } |
62 | |
63 | TIMING_NOW (start); |
64 | for (i = 0; i < iters; ++i) |
65 | { |
66 | CALL (impl, s, maxlen); |
67 | } |
68 | TIMING_NOW (stop); |
69 | |
70 | TIMING_DIFF (cur, start, stop); |
71 | |
72 | json_element_double (ctx: json_ctx, d: (double) cur / (double) iters); |
73 | } |
74 | |
75 | static void |
76 | do_test (json_ctx_t *json_ctx, size_t align, size_t len, size_t maxlen, |
77 | int max_char) |
78 | { |
79 | size_t i; |
80 | |
81 | align &= getpagesize () - 1; |
82 | if ((align + len) * sizeof (CHAR) >= page_size) |
83 | return; |
84 | |
85 | CHAR *buf = (CHAR *) (buf1); |
86 | |
87 | json_element_object_begin (ctx: json_ctx); |
88 | json_attr_uint (ctx: json_ctx, name: "len" , d: len); |
89 | json_attr_uint (ctx: json_ctx, name: "maxlen" , d: maxlen); |
90 | json_attr_uint (ctx: json_ctx, name: "max_char" , d: max_char); |
91 | json_attr_uint (ctx: json_ctx, name: "align" , d: align); |
92 | json_array_begin (ctx: json_ctx, name: "timings" ); |
93 | |
94 | for (i = 0; i < len; ++i) |
95 | buf[align + i] = 1 + 7 * i % max_char; |
96 | buf[align + len] = 0; |
97 | |
98 | FOR_EACH_IMPL (impl, 0) |
99 | do_one_test (json_ctx, impl, s: (CHAR *) (buf + align), maxlen, |
100 | MIN (len, maxlen)); |
101 | |
102 | json_array_end (ctx: json_ctx); |
103 | json_element_object_end (ctx: json_ctx); |
104 | } |
105 | |
106 | int |
107 | test_main (void) |
108 | { |
109 | size_t i, j; |
110 | json_ctx_t json_ctx; |
111 | |
112 | test_init (); |
113 | |
114 | json_init (ctx: &json_ctx, indent_level: 0, stdout); |
115 | |
116 | json_document_begin (ctx: &json_ctx); |
117 | json_attr_string (ctx: &json_ctx, name: "timing_type" , TIMING_TYPE); |
118 | |
119 | json_attr_object_begin (ctx: &json_ctx, name: "functions" ); |
120 | json_attr_object_begin (ctx: &json_ctx, TEST_NAME); |
121 | json_attr_string (ctx: &json_ctx, name: "bench-variant" , s: "" ); |
122 | |
123 | json_array_begin (ctx: &json_ctx, name: "ifuncs" ); |
124 | FOR_EACH_IMPL (impl, 0) |
125 | json_element_string (ctx: &json_ctx, s: impl->name); |
126 | json_array_end (ctx: &json_ctx); |
127 | |
128 | json_array_begin (ctx: &json_ctx, name: "results" ); |
129 | |
130 | for (i = 0; i <= 1; ++i) |
131 | { |
132 | do_test (json_ctx: &json_ctx, align: i, len: 1, maxlen: 128, MIDDLE_CHAR); |
133 | do_test (json_ctx: &json_ctx, align: i, len: 128, maxlen: 1, MIDDLE_CHAR); |
134 | do_test (json_ctx: &json_ctx, align: i, len: 1, maxlen: 2, MIDDLE_CHAR); |
135 | do_test (json_ctx: &json_ctx, align: i, len: 2, maxlen: 1, MIDDLE_CHAR); |
136 | |
137 | do_test (json_ctx: &json_ctx, align: 32 + i, len: 1, maxlen: 128, MIDDLE_CHAR); |
138 | do_test (json_ctx: &json_ctx, align: 32 + i, len: 128, maxlen: 1, MIDDLE_CHAR); |
139 | do_test (json_ctx: &json_ctx, align: 32 + i, len: 1, maxlen: 2, MIDDLE_CHAR); |
140 | do_test (json_ctx: &json_ctx, align: 32 + i, len: 2, maxlen: 1, MIDDLE_CHAR); |
141 | } |
142 | |
143 | for (i = 1; i < 8; ++i) |
144 | { |
145 | do_test (json_ctx: &json_ctx, align: 0, len: i, maxlen: i - 1, MIDDLE_CHAR); |
146 | do_test (json_ctx: &json_ctx, align: 0, len: i, maxlen: i, MIDDLE_CHAR); |
147 | do_test (json_ctx: &json_ctx, align: 0, len: i, maxlen: i + 1, MIDDLE_CHAR); |
148 | } |
149 | |
150 | for (i = 1; i < 8; ++i) |
151 | { |
152 | do_test (json_ctx: &json_ctx, align: i, len: i, maxlen: i - 1, MIDDLE_CHAR); |
153 | do_test (json_ctx: &json_ctx, align: i, len: i, maxlen: i, MIDDLE_CHAR); |
154 | do_test (json_ctx: &json_ctx, align: i, len: i, maxlen: i + 1, MIDDLE_CHAR); |
155 | } |
156 | |
157 | for (i = 2; i <= 10; ++i) |
158 | { |
159 | do_test (json_ctx: &json_ctx, align: 0, len: 1 << i, maxlen: 5000, MIDDLE_CHAR); |
160 | do_test (json_ctx: &json_ctx, align: 1, len: 1 << i, maxlen: 5000, MIDDLE_CHAR); |
161 | do_test (json_ctx: &json_ctx, align: 0, len: 5000, maxlen: 1 << i, MIDDLE_CHAR); |
162 | do_test (json_ctx: &json_ctx, align: 1, len: 5000, maxlen: 1 << i, MIDDLE_CHAR); |
163 | } |
164 | |
165 | for (i = 1; i < 8; ++i) |
166 | { |
167 | do_test (json_ctx: &json_ctx, align: 0, len: i, maxlen: 5000, BIG_CHAR); |
168 | do_test (json_ctx: &json_ctx, align: 0, len: 5000, maxlen: i, BIG_CHAR); |
169 | } |
170 | |
171 | for (i = 1; i < 8; ++i) |
172 | { |
173 | do_test (json_ctx: &json_ctx, align: i, len: i, maxlen: 5000, BIG_CHAR); |
174 | do_test (json_ctx: &json_ctx, align: i, len: 5000, maxlen: i, BIG_CHAR); |
175 | } |
176 | |
177 | for (i = 2; i <= 10; ++i) |
178 | { |
179 | do_test (json_ctx: &json_ctx, align: 0, len: 1 << i, maxlen: 5000, BIG_CHAR); |
180 | do_test (json_ctx: &json_ctx, align: 1, len: 1 << i, maxlen: 5000, BIG_CHAR); |
181 | do_test (json_ctx: &json_ctx, align: 0, len: 5000, maxlen: 1 << i, BIG_CHAR); |
182 | do_test (json_ctx: &json_ctx, align: 1, len: 5000, maxlen: 1 << i, BIG_CHAR); |
183 | } |
184 | |
185 | for (i = (16 / sizeof (CHAR)); i <= (8192 / sizeof (CHAR)); i += i) |
186 | { |
187 | for (j = 0; j <= (704 / sizeof (CHAR)); j += (32 / sizeof (CHAR))) |
188 | { |
189 | do_test (json_ctx: &json_ctx, align: 0, len: i + j, maxlen: i, BIG_CHAR); |
190 | do_test (json_ctx: &json_ctx, align: 64, len: i + j, maxlen: i, BIG_CHAR); |
191 | |
192 | do_test (json_ctx: &json_ctx, align: 0, len: i, maxlen: i + j, BIG_CHAR); |
193 | do_test (json_ctx: &json_ctx, align: 64, len: i, maxlen: i + j, BIG_CHAR); |
194 | |
195 | if (j < i) |
196 | { |
197 | do_test (json_ctx: &json_ctx, align: 0, len: i - j, maxlen: i, BIG_CHAR); |
198 | do_test (json_ctx: &json_ctx, align: 64, len: i - j, maxlen: i, BIG_CHAR); |
199 | |
200 | do_test (json_ctx: &json_ctx, align: 0, len: i, maxlen: i - j, BIG_CHAR); |
201 | do_test (json_ctx: &json_ctx, align: 64, len: i, maxlen: i - j, BIG_CHAR); |
202 | } |
203 | } |
204 | } |
205 | |
206 | json_array_end (ctx: &json_ctx); |
207 | json_attr_object_end (ctx: &json_ctx); |
208 | json_attr_object_end (ctx: &json_ctx); |
209 | json_document_end (ctx: &json_ctx); |
210 | |
211 | return ret; |
212 | } |
213 | |
214 | #include <support/test-driver.c> |
215 | |
216 | #define libc_hidden_def(X) |
217 | #ifndef WIDE |
218 | # undef STRNLEN |
219 | # define STRNLEN generic_strnlen |
220 | # include <string/strnlen.c> |
221 | #else |
222 | # define WCSNLEN generic_strnlen |
223 | # include <wcsmbs/wcsnlen.c> |
224 | #endif |
225 | |