1 /* Measure memcmp functions.
2 Copyright (C) 2013-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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/>. */
21 # define TEST_NAME "__memcmpeq"
23 # define TEST_NAME "wmemcmp"
25 # define TEST_NAME "memcmp"
27 #include "bench-string.h"
30 typedef int (*proto_t) (const CHAR *, const CHAR *, size_t);
35 do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s1,
36 const CHAR *s2, size_t len)
38 size_t i, iters = INNER_LOOP_ITERS_LARGE;
39 timing_t start, stop, cur;
42 for (i = 0; i < iters; ++i)
44 CALL (impl, s1, s2, len);
48 TIMING_DIFF (cur, start, stop);
50 json_element_double (json_ctx, (double) cur / (double) iters);
54 do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len,
60 align1 &= (4096 - CHARBYTES);
61 if (align1 + (len + 1) * CHARBYTES >= page_size)
64 align2 &= (4096 - CHARBYTES);
65 if (align2 + (len + 1) * CHARBYTES >= page_size)
68 json_element_object_begin (json_ctx);
69 json_attr_uint (json_ctx, "length", (double) len);
70 json_attr_uint (json_ctx, "align1", (double) align1);
71 json_attr_uint (json_ctx, "align2", (double) align2);
72 json_attr_uint (json_ctx, "result", (double) exp_result);
73 json_array_begin (json_ctx, "timings");
75 s1 = (CHAR *)(buf1 + align1);
76 s2 = (CHAR *)(buf2 + align2);
78 for (i = 0; i < len; i++)
79 s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % MAX_CHAR;
85 s2[len - 1] -= exp_result;
88 FOR_EACH_IMPL (impl, 0)
90 do_one_test (json_ctx, impl, s1, s2, len);
93 json_array_end (json_ctx);
94 json_element_object_end (json_ctx);
105 json_init (&json_ctx, 0, stdout);
107 json_document_begin (&json_ctx);
108 json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
110 json_attr_object_begin (&json_ctx, "functions");
111 json_attr_object_begin (&json_ctx, TEST_NAME);
112 json_attr_string (&json_ctx, "bench-variant", "default");
114 json_array_begin (&json_ctx, "ifuncs");
115 FOR_EACH_IMPL (impl, 0)
116 json_element_string (&json_ctx, impl->name);
117 json_array_end (&json_ctx);
119 json_array_begin (&json_ctx, "results");
120 for (i = 0; i < 32; ++i)
122 do_test (&json_ctx, i * CHARBYTES, i * CHARBYTES, i, 0);
123 do_test (&json_ctx, i * CHARBYTES, i * CHARBYTES, i, 1);
124 do_test (&json_ctx, i * CHARBYTES, i * CHARBYTES, i, -1);
127 for (i = 0; i < 32; ++i)
129 do_test (&json_ctx, 0, 0, i, 0);
130 do_test (&json_ctx, 0, 0, i, 1);
131 do_test (&json_ctx, 0, 0, i, -1);
132 do_test (&json_ctx, 4096 - i, 0, i, 0);
133 do_test (&json_ctx, 4096 - i, 0, i, 1);
134 do_test (&json_ctx, 4096 - i, 0, i, -1);
137 for (i = 33; i < 385; i += 32)
139 do_test (&json_ctx, 0, 0, i, 0);
140 do_test (&json_ctx, 0, 0, i, 1);
141 do_test (&json_ctx, 0, 0, i, -1);
142 do_test (&json_ctx, i, 0, i, 0);
143 do_test (&json_ctx, 0, i, i, 1);
144 do_test (&json_ctx, i, i, i, -1);
147 for (i = 1; i < 10; ++i)
149 do_test (&json_ctx, 0, 0, 2 << i, 0);
150 do_test (&json_ctx, 0, 0, 2 << i, 1);
151 do_test (&json_ctx, 0, 0, 2 << i, -1);
152 do_test (&json_ctx, (8 - i) * CHARBYTES, (2 * i) * CHARBYTES, 16 << i, 0);
153 do_test (&json_ctx, 0, 0, 16 << i, 0);
154 do_test (&json_ctx, 0, 0, 16 << i, 1);
155 do_test (&json_ctx, 0, 0, 16 << i, -1);
156 do_test (&json_ctx, i, 0, 2 << i, 0);
157 do_test (&json_ctx, 0, i, 2 << i, 1);
158 do_test (&json_ctx, i, i, 2 << i, -1);
159 do_test (&json_ctx, i, 0, 16 << i, 0);
160 do_test (&json_ctx, 0, i, 16 << i, 1);
161 do_test (&json_ctx, i, i, 16 << i, -1);
164 for (i = 1; i < 10; ++i)
166 do_test (&json_ctx, i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, 0);
167 do_test (&json_ctx, i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, 1);
168 do_test (&json_ctx, i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, -1);
171 json_array_end (&json_ctx);
172 json_attr_object_end (&json_ctx);
173 json_attr_object_end (&json_ctx);
174 json_document_end (&json_ctx);
179 #include <support/test-driver.c>