1 | /* Measure STRLEN 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 | #ifndef WIDE |
21 | # define TEST_NAME "strlen" |
22 | #else |
23 | # define TEST_NAME "wcslen" |
24 | # define generic_strlen generic_wcslen |
25 | # define memchr_strlen wcschr_wcslen |
26 | #endif |
27 | #include "bench-string.h" |
28 | |
29 | #include "json-lib.h" |
30 | |
31 | typedef size_t (*proto_t) (const CHAR *); |
32 | |
33 | size_t generic_strlen (const CHAR *); |
34 | size_t memchr_strlen (const CHAR *); |
35 | |
36 | IMPL (memchr_strlen, 0) |
37 | IMPL (generic_strlen, 0) |
38 | |
39 | size_t |
40 | memchr_strlen (const CHAR *p) |
41 | { |
42 | return (const CHAR *)MEMCHR (p, 0, PTRDIFF_MAX) - p; |
43 | } |
44 | |
45 | IMPL (STRLEN, 1) |
46 | |
47 | |
48 | static void |
49 | do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s, size_t exp_len) |
50 | { |
51 | size_t len = CALL (impl, s), i, iters = INNER_LOOP_ITERS_LARGE; |
52 | timing_t start, stop, cur; |
53 | |
54 | if (len != exp_len) |
55 | { |
56 | error (status: 0, errnum: 0, format: "Wrong result in function %s %zd %zd" , impl->name, |
57 | len, exp_len); |
58 | ret = 1; |
59 | return; |
60 | } |
61 | |
62 | TIMING_NOW (start); |
63 | for (i = 0; i < iters; ++i) |
64 | { |
65 | CALL (impl, s); |
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 | size_t i; |
78 | |
79 | align &= 63; |
80 | if (align + sizeof (CHAR) * len >= page_size) |
81 | return; |
82 | |
83 | json_element_object_begin (ctx: json_ctx); |
84 | json_attr_uint (ctx: json_ctx, name: "length" , d: len); |
85 | json_attr_uint (ctx: json_ctx, name: "alignment" , d: align); |
86 | json_array_begin (ctx: json_ctx, name: "timings" ); |
87 | |
88 | |
89 | FOR_EACH_IMPL (impl, 0) |
90 | { |
91 | CHAR *buf = (CHAR *) (buf1); |
92 | |
93 | for (i = 0; i < len; ++i) |
94 | buf[align + i] = 1 + 11111 * i % MAX_CHAR; |
95 | buf[align + len] = 0; |
96 | |
97 | do_one_test (json_ctx, impl, s: (CHAR *) (buf + align), exp_len: len); |
98 | alloc_bufs (); |
99 | } |
100 | |
101 | json_array_end (ctx: json_ctx); |
102 | json_element_object_end (ctx: json_ctx); |
103 | } |
104 | |
105 | int |
106 | test_main (void) |
107 | { |
108 | json_ctx_t json_ctx; |
109 | size_t i; |
110 | |
111 | test_init (); |
112 | |
113 | json_init (ctx: &json_ctx, indent_level: 0, stdout); |
114 | |
115 | json_document_begin (ctx: &json_ctx); |
116 | json_attr_string (ctx: &json_ctx, name: "timing_type" , TIMING_TYPE); |
117 | |
118 | json_attr_object_begin (ctx: &json_ctx, name: "functions" ); |
119 | json_attr_object_begin (ctx: &json_ctx, TEST_NAME); |
120 | json_attr_string (ctx: &json_ctx, name: "bench-variant" , s: "" ); |
121 | |
122 | json_array_begin (ctx: &json_ctx, name: "ifuncs" ); |
123 | FOR_EACH_IMPL (impl, 0) |
124 | json_element_string (ctx: &json_ctx, s: impl->name); |
125 | json_array_end (ctx: &json_ctx); |
126 | |
127 | json_array_begin (ctx: &json_ctx, name: "results" ); |
128 | /* Checking with only 4 * N alignments for wcslen, other alignments are wrong for wchar_t type arrays*/ |
129 | |
130 | for (i = 1; i < 8; ++i) |
131 | { |
132 | do_test (json_ctx: &json_ctx, align: sizeof (CHAR) * i, len: i); |
133 | do_test (json_ctx: &json_ctx, align: 0, len: i); |
134 | } |
135 | |
136 | for (i = 2; i <= 12; ++i) |
137 | { |
138 | do_test (json_ctx: &json_ctx, align: 0, len: 1 << i); |
139 | do_test (json_ctx: &json_ctx, align: sizeof (CHAR) * 7, len: 1 << i); |
140 | do_test (json_ctx: &json_ctx, align: sizeof (CHAR) * i, len: 1 << i); |
141 | do_test (json_ctx: &json_ctx, align: sizeof (CHAR) * i, len: (size_t)((1 << i) / 1.5)); |
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 | #define libc_hidden_builtin_def(X) |
155 | #ifndef WIDE |
156 | # undef STRLEN |
157 | # define STRLEN generic_strlen |
158 | # include <string/strlen.c> |
159 | #else |
160 | # define WCSLEN generic_strlen |
161 | # include <wcsmbs/wcslen.c> |
162 | #endif |
163 | |