1 | /* Measure memcmp 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 | #ifdef TEST_MEMCMPEQ |
21 | # define TEST_NAME "__memcmpeq" |
22 | #elif defined WIDE |
23 | # define TEST_NAME "wmemcmp" |
24 | #else |
25 | # define TEST_NAME "memcmp" |
26 | #endif |
27 | #include "bench-string.h" |
28 | #include "json-lib.h" |
29 | |
30 | typedef int (*proto_t) (const CHAR *, const CHAR *, size_t); |
31 | |
32 | IMPL (MEMCMP, 1) |
33 | |
34 | static void |
35 | do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s1, |
36 | const CHAR *s2, size_t len) |
37 | { |
38 | size_t i, iters = INNER_LOOP_ITERS_LARGE; |
39 | timing_t start, stop, cur; |
40 | |
41 | TIMING_NOW (start); |
42 | for (i = 0; i < iters; ++i) |
43 | { |
44 | CALL (impl, s1, s2, 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 | int exp_result) |
56 | { |
57 | size_t i; |
58 | CHAR *s1, *s2; |
59 | |
60 | align1 &= (4096 - CHARBYTES); |
61 | if (align1 + (len + 1) * CHARBYTES >= page_size) |
62 | return; |
63 | |
64 | align2 &= (4096 - CHARBYTES); |
65 | if (align2 + (len + 1) * CHARBYTES >= page_size) |
66 | return; |
67 | |
68 | json_element_object_begin (ctx: json_ctx); |
69 | json_attr_uint (ctx: json_ctx, name: "length" , d: (double) len); |
70 | json_attr_uint (ctx: json_ctx, name: "align1" , d: (double) align1); |
71 | json_attr_uint (ctx: json_ctx, name: "align2" , d: (double) align2); |
72 | json_attr_uint (ctx: json_ctx, name: "result" , d: (double) exp_result); |
73 | json_array_begin (ctx: json_ctx, name: "timings" ); |
74 | |
75 | s1 = (CHAR *)(buf1 + align1); |
76 | s2 = (CHAR *)(buf2 + align2); |
77 | |
78 | for (i = 0; i < len; i++) |
79 | s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % MAX_CHAR; |
80 | |
81 | if (len) |
82 | { |
83 | s1[len] = align1; |
84 | s2[len] = align2; |
85 | s2[len - 1] -= exp_result; |
86 | } |
87 | |
88 | FOR_EACH_IMPL (impl, 0) |
89 | { |
90 | do_one_test (json_ctx, impl, s1, s2, len); |
91 | } |
92 | |
93 | json_array_end (ctx: json_ctx); |
94 | json_element_object_end (ctx: json_ctx); |
95 | } |
96 | |
97 | int |
98 | test_main (void) |
99 | { |
100 | json_ctx_t json_ctx; |
101 | size_t i; |
102 | |
103 | test_init (); |
104 | |
105 | json_init (ctx: &json_ctx, indent_level: 0, stdout); |
106 | |
107 | json_document_begin (ctx: &json_ctx); |
108 | json_attr_string (ctx: &json_ctx, name: "timing_type" , TIMING_TYPE); |
109 | |
110 | json_attr_object_begin (ctx: &json_ctx, name: "functions" ); |
111 | json_attr_object_begin (ctx: &json_ctx, TEST_NAME); |
112 | json_attr_string (ctx: &json_ctx, name: "bench-variant" , s: "default" ); |
113 | |
114 | json_array_begin (ctx: &json_ctx, name: "ifuncs" ); |
115 | FOR_EACH_IMPL (impl, 0) |
116 | json_element_string (ctx: &json_ctx, s: impl->name); |
117 | json_array_end (ctx: &json_ctx); |
118 | |
119 | json_array_begin (ctx: &json_ctx, name: "results" ); |
120 | for (i = 0; i < 32; ++i) |
121 | { |
122 | do_test (json_ctx: &json_ctx, align1: i * CHARBYTES, align2: i * CHARBYTES, len: i, exp_result: 0); |
123 | do_test (json_ctx: &json_ctx, align1: i * CHARBYTES, align2: i * CHARBYTES, len: i, exp_result: 1); |
124 | do_test (json_ctx: &json_ctx, align1: i * CHARBYTES, align2: i * CHARBYTES, len: i, exp_result: -1); |
125 | } |
126 | |
127 | for (i = 0; i < 32; ++i) |
128 | { |
129 | do_test (json_ctx: &json_ctx, align1: 0, align2: 0, len: i, exp_result: 0); |
130 | do_test (json_ctx: &json_ctx, align1: 0, align2: 0, len: i, exp_result: 1); |
131 | do_test (json_ctx: &json_ctx, align1: 0, align2: 0, len: i, exp_result: -1); |
132 | do_test (json_ctx: &json_ctx, align1: 4096 - i, align2: 0, len: i, exp_result: 0); |
133 | do_test (json_ctx: &json_ctx, align1: 4096 - i, align2: 0, len: i, exp_result: 1); |
134 | do_test (json_ctx: &json_ctx, align1: 4096 - i, align2: 0, len: i, exp_result: -1); |
135 | } |
136 | |
137 | for (i = 33; i < 385; i += 32) |
138 | { |
139 | do_test (json_ctx: &json_ctx, align1: 0, align2: 0, len: i, exp_result: 0); |
140 | do_test (json_ctx: &json_ctx, align1: 0, align2: 0, len: i, exp_result: 1); |
141 | do_test (json_ctx: &json_ctx, align1: 0, align2: 0, len: i, exp_result: -1); |
142 | do_test (json_ctx: &json_ctx, align1: i, align2: 0, len: i, exp_result: 0); |
143 | do_test (json_ctx: &json_ctx, align1: 0, align2: i, len: i, exp_result: 1); |
144 | do_test (json_ctx: &json_ctx, align1: i, align2: i, len: i, exp_result: -1); |
145 | } |
146 | |
147 | for (i = 1; i < 10; ++i) |
148 | { |
149 | do_test (json_ctx: &json_ctx, align1: 0, align2: 0, len: 2 << i, exp_result: 0); |
150 | do_test (json_ctx: &json_ctx, align1: 0, align2: 0, len: 2 << i, exp_result: 1); |
151 | do_test (json_ctx: &json_ctx, align1: 0, align2: 0, len: 2 << i, exp_result: -1); |
152 | do_test (json_ctx: &json_ctx, align1: (8 - i) * CHARBYTES, align2: (2 * i) * CHARBYTES, len: 16 << i, exp_result: 0); |
153 | do_test (json_ctx: &json_ctx, align1: 0, align2: 0, len: 16 << i, exp_result: 0); |
154 | do_test (json_ctx: &json_ctx, align1: 0, align2: 0, len: 16 << i, exp_result: 1); |
155 | do_test (json_ctx: &json_ctx, align1: 0, align2: 0, len: 16 << i, exp_result: -1); |
156 | do_test (json_ctx: &json_ctx, align1: i, align2: 0, len: 2 << i, exp_result: 0); |
157 | do_test (json_ctx: &json_ctx, align1: 0, align2: i, len: 2 << i, exp_result: 1); |
158 | do_test (json_ctx: &json_ctx, align1: i, align2: i, len: 2 << i, exp_result: -1); |
159 | do_test (json_ctx: &json_ctx, align1: i, align2: 0, len: 16 << i, exp_result: 0); |
160 | do_test (json_ctx: &json_ctx, align1: 0, align2: i, len: 16 << i, exp_result: 1); |
161 | do_test (json_ctx: &json_ctx, align1: i, align2: i, len: 16 << i, exp_result: -1); |
162 | } |
163 | |
164 | for (i = 1; i < 10; ++i) |
165 | { |
166 | do_test (json_ctx: &json_ctx, align1: i * CHARBYTES, align2: 2 * (i * CHARBYTES), len: 8 << i, exp_result: 0); |
167 | do_test (json_ctx: &json_ctx, align1: i * CHARBYTES, align2: 2 * (i * CHARBYTES), len: 8 << i, exp_result: 1); |
168 | do_test (json_ctx: &json_ctx, align1: i * CHARBYTES, align2: 2 * (i * CHARBYTES), len: 8 << i, exp_result: -1); |
169 | } |
170 | |
171 | json_array_end (ctx: &json_ctx); |
172 | json_attr_object_end (ctx: &json_ctx); |
173 | json_attr_object_end (ctx: &json_ctx); |
174 | json_document_end (ctx: &json_ctx); |
175 | |
176 | return ret; |
177 | } |
178 | |
179 | #include <support/test-driver.c> |
180 | |