1 /* Measure memmove functions.
2 Copyright (C) 2013-2024 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/>. */
20 #define TEST_NAME "memmove"
21 #include "bench-string.h"
24 void *generic_memmove (void *, const void *, size_t);
26 typedef void *(*proto_t) (void *, const void *, size_t);
29 IMPL (generic_memmove, 0)
32 do_one_test (json_ctx_t *json_ctx, impl_t *impl, char *dst, char *src,
35 size_t i, iters = INNER_LOOP_ITERS;
36 timing_t start, stop, cur;
37 for (i = 0; i < iters / 64; ++i)
39 CALL (impl, dst, src, len);
42 for (i = 0; i < iters; ++i)
44 CALL (impl, dst, src, 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)
59 align1 &= (getpagesize () - 1);
60 if (align1 + len >= page_size)
63 align2 &= (getpagesize () - 1);
64 if (align2 + len >= page_size)
67 s1 = (char *) (buf2 + align1);
68 s2 = (char *) (buf2 + align2);
70 for (i = 0, j = 1; i < len; i++, j += 23)
73 json_element_object_begin (json_ctx);
74 json_attr_uint (json_ctx, "length", (double) len);
75 json_attr_uint (json_ctx, "align1", (double) align1);
76 json_attr_uint (json_ctx, "align2", (double) align2);
77 json_array_begin (json_ctx, "timings");
79 FOR_EACH_IMPL (impl, 0)
80 do_one_test (json_ctx, impl, s2, s1, len);
82 json_array_end (json_ctx);
83 json_element_object_end (json_ctx);
91 size_t half_page = getpagesize () / 2;
95 json_init (&json_ctx, 0, stdout);
97 json_document_begin (&json_ctx);
98 json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
100 json_attr_object_begin (&json_ctx, "functions");
101 json_attr_object_begin (&json_ctx, "memmove");
102 json_attr_string (&json_ctx, "bench-variant", "default");
104 json_array_begin (&json_ctx, "ifuncs");
106 FOR_EACH_IMPL (impl, 0)
107 json_element_string (&json_ctx, impl->name);
108 json_array_end (&json_ctx);
110 json_array_begin (&json_ctx, "results");
111 for (i = 0; i < 14; ++i)
113 do_test (&json_ctx, 0, 32, 1 << i);
114 do_test (&json_ctx, 32, 0, 1 << i);
115 do_test (&json_ctx, 0, i, 1 << i);
116 do_test (&json_ctx, i, 0, 1 << i);
119 for (i = 0; i < 32; ++i)
121 do_test (&json_ctx, 0, 32, i);
122 do_test (&json_ctx, 32, 0, i);
123 do_test (&json_ctx, 0, i, i);
124 do_test (&json_ctx, i, 0, i);
127 for (i = 3; i < 32; ++i)
129 if ((i & (i - 1)) == 0)
131 do_test (&json_ctx, 0, 32, 16 * i);
132 do_test (&json_ctx, 32, 0, 16 * i);
133 do_test (&json_ctx, 0, i, 16 * i);
134 do_test (&json_ctx, i, 0, 16 * i);
137 for (i = 32; i < 64; ++i)
139 do_test (&json_ctx, 0, 0, 32 * i);
140 do_test (&json_ctx, i, 0, 32 * i);
141 do_test (&json_ctx, 0, i, 32 * i);
142 do_test (&json_ctx, i, i, 32 * i);
145 for (i = 0; i <= 48; ++i)
147 do_test (&json_ctx, 0, 0, 2048 + 64 * i);
148 do_test (&json_ctx, i, 0, 2048 + 64 * i);
149 do_test (&json_ctx, 0, i, 2048 + 64 * i);
150 do_test (&json_ctx, i, i, 2048 + 64 * i);
151 do_test (&json_ctx, half_page, 0, 2048 + 64 * i);
152 do_test (&json_ctx, 0, half_page, 2048 + 64 * i);
153 do_test (&json_ctx, half_page + i, 0, 2048 + 64 * i);
154 do_test (&json_ctx, i, half_page, 2048 + 64 * i);
155 do_test (&json_ctx, half_page, i, 2048 + 64 * i);
156 do_test (&json_ctx, 0, half_page + i, 2048 + 64 * i);
157 do_test (&json_ctx, half_page + i, i, 2048 + 64 * i);
158 do_test (&json_ctx, i, half_page + i, 2048 + 64 * i);
161 json_array_end (&json_ctx);
162 json_attr_object_end (&json_ctx);
163 json_attr_object_end (&json_ctx);
164 json_document_end (&json_ctx);
169 #include <support/test-driver.c>
171 #define libc_hidden_builtin_def(X)
173 #define MEMMOVE generic_memmove
174 #include <string/memmove.c>
175 #include <string/wordcopy.c>