1 | /* Measure memchr 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 | #include <assert.h> |
20 | #include <stdint.h> |
21 | |
22 | #define TEST_MAIN |
23 | #define TEST_NAME "rawmemchr" |
24 | #include "bench-string.h" |
25 | |
26 | #include "json-lib.h" |
27 | |
28 | typedef char *(*proto_t) (const char *, int); |
29 | |
30 | char * |
31 | generic_rawmemchr (const char *s, int c) |
32 | { |
33 | if (c != 0) |
34 | return memchr (s, c, PTRDIFF_MAX); |
35 | return (char *)s + strlen (s); |
36 | } |
37 | |
38 | IMPL (rawmemchr, 1) |
39 | IMPL (generic_rawmemchr, 0) |
40 | |
41 | static void |
42 | do_one_test (json_ctx_t *json_ctx, impl_t *impl, const char *s, int c, char *exp_res) |
43 | { |
44 | size_t i, iters = INNER_LOOP_ITERS_LARGE * 4; |
45 | timing_t start, stop, cur; |
46 | char *res = CALL (impl, s, c); |
47 | if (res != exp_res) |
48 | { |
49 | error (status: 0, errnum: 0, format: "Wrong result in function %s %p %p" , impl->name, |
50 | res, exp_res); |
51 | ret = 1; |
52 | return; |
53 | } |
54 | |
55 | TIMING_NOW (start); |
56 | for (i = 0; i < iters; ++i) |
57 | { |
58 | CALL (impl, s, c); |
59 | } |
60 | TIMING_NOW (stop); |
61 | |
62 | TIMING_DIFF (cur, start, stop); |
63 | |
64 | json_element_double (ctx: json_ctx, d: (double) cur / (double) iters); |
65 | } |
66 | |
67 | static void |
68 | do_test (json_ctx_t *json_ctx, size_t align, size_t pos, size_t len, int seek_char) |
69 | { |
70 | size_t i; |
71 | char *result; |
72 | |
73 | align &= 7; |
74 | if (align + len >= page_size) |
75 | return; |
76 | |
77 | for (i = 0; i < len; ++i) |
78 | { |
79 | buf1[align + i] = 1 + 23 * i % 127; |
80 | if (buf1[align + i] == seek_char) |
81 | buf1[align + i] = seek_char + 1; |
82 | } |
83 | buf1[align + len] = 0; |
84 | |
85 | assert (pos < len); |
86 | |
87 | buf1[align + pos] = seek_char; |
88 | buf1[align + len] = -seek_char; |
89 | result = (char *) (buf1 + align + pos); |
90 | |
91 | json_element_object_begin (ctx: json_ctx); |
92 | json_attr_uint (ctx: json_ctx, name: "length" , d: pos); |
93 | json_attr_uint (ctx: json_ctx, name: "alignment" , d: align); |
94 | json_attr_uint (ctx: json_ctx, name: "char" , d: seek_char); |
95 | json_array_begin (ctx: json_ctx, name: "timings" ); |
96 | |
97 | FOR_EACH_IMPL (impl, 0) |
98 | do_one_test (json_ctx, impl, s: (char *) (buf1 + align), c: seek_char, exp_res: result); |
99 | |
100 | json_array_end (ctx: json_ctx); |
101 | json_element_object_end (ctx: json_ctx); |
102 | } |
103 | |
104 | int |
105 | test_main (void) |
106 | { |
107 | json_ctx_t json_ctx; |
108 | size_t i; |
109 | |
110 | test_init (); |
111 | |
112 | json_init (ctx: &json_ctx, indent_level: 0, stdout); |
113 | |
114 | json_document_begin (ctx: &json_ctx); |
115 | json_attr_string (ctx: &json_ctx, name: "timing_type" , TIMING_TYPE); |
116 | |
117 | json_attr_object_begin (ctx: &json_ctx, name: "functions" ); |
118 | json_attr_object_begin (ctx: &json_ctx, TEST_NAME); |
119 | json_attr_string (ctx: &json_ctx, name: "bench-variant" , s: "" ); |
120 | |
121 | json_array_begin (ctx: &json_ctx, name: "ifuncs" ); |
122 | FOR_EACH_IMPL (impl, 0) |
123 | json_element_string (ctx: &json_ctx, s: impl->name); |
124 | json_array_end (ctx: &json_ctx); |
125 | |
126 | json_array_begin (ctx: &json_ctx, name: "results" ); |
127 | |
128 | for (i = 1; i < 7; ++i) |
129 | { |
130 | do_test (json_ctx: &json_ctx, align: 0, pos: 16 << i, len: 2048, seek_char: 23); |
131 | do_test (json_ctx: &json_ctx, align: i, pos: 64, len: 256, seek_char: 23); |
132 | do_test (json_ctx: &json_ctx, align: 0, pos: 16 << i, len: 2048, seek_char: 0); |
133 | do_test (json_ctx: &json_ctx, align: i, pos: 64, len: 256, seek_char: 0); |
134 | } |
135 | for (i = 1; i < 32; ++i) |
136 | { |
137 | do_test (json_ctx: &json_ctx, align: 0, pos: i, len: i + 1, seek_char: 23); |
138 | do_test (json_ctx: &json_ctx, align: 0, pos: i, len: i + 1, seek_char: 0); |
139 | } |
140 | |
141 | json_array_end (ctx: &json_ctx); |
142 | json_attr_object_end (ctx: &json_ctx); |
143 | json_attr_object_end (ctx: &json_ctx); |
144 | json_document_end (ctx: &json_ctx); |
145 | |
146 | return ret; |
147 | } |
148 | |
149 | #include <support/test-driver.c> |
150 | |