1 /* Measure memcpy functions.
2 Copyright (C) 2013-2019 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 <http://www.gnu.org/licenses/>. */
20 # define MEMCPY_RESULT(dst, len) dst
21 # define MIN_PAGE_SIZE 131072
23 # define TEST_NAME "memcpy"
24 # include "bench-string.h"
27 simple_memcpy (char *dst, const char *src, size_t n)
36 IMPL (simple_memcpy, 0)
40 # include "json-lib.h"
42 typedef char *(*proto_t) (char *, const char *, size_t);
45 do_one_test (json_ctx_t *json_ctx, impl_t *impl, char *dst, const char *src,
48 size_t i, iters = INNER_LOOP_ITERS;
49 timing_t start, stop, cur;
52 for (i = 0; i < iters; ++i)
54 CALL (impl, dst, src, len);
58 TIMING_DIFF (cur, start, stop);
60 json_element_double (json_ctx, (double) cur / (double) iters);
64 do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len)
70 if (align1 + len >= page_size)
74 if (align2 + len >= page_size)
77 s1 = (char *) (buf1 + align1);
78 s2 = (char *) (buf2 + align2);
80 for (i = 0, j = 1; i < len; i++, j += 23)
83 json_element_object_begin (json_ctx);
84 json_attr_uint (json_ctx, "length", (double) len);
85 json_attr_uint (json_ctx, "align1", (double) align1);
86 json_attr_uint (json_ctx, "align2", (double) align2);
87 json_array_begin (json_ctx, "timings");
89 FOR_EACH_IMPL (impl, 0)
90 do_one_test (json_ctx, impl, s2, s1, len);
92 json_array_end (json_ctx);
93 json_element_object_end (json_ctx);
104 json_init (&json_ctx, 0, stdout);
106 json_document_begin (&json_ctx);
107 json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
109 json_attr_object_begin (&json_ctx, "functions");
110 json_attr_object_begin (&json_ctx, TEST_NAME);
111 json_attr_string (&json_ctx, "bench-variant", "default");
113 json_array_begin (&json_ctx, "ifuncs");
114 FOR_EACH_IMPL (impl, 0)
115 json_element_string (&json_ctx, impl->name);
116 json_array_end (&json_ctx);
118 json_array_begin (&json_ctx, "results");
119 for (i = 0; i < 18; ++i)
121 do_test (&json_ctx, 0, 0, 1 << i);
122 do_test (&json_ctx, i, 0, 1 << i);
123 do_test (&json_ctx, 0, i, 1 << i);
124 do_test (&json_ctx, i, i, 1 << i);
127 for (i = 0; i < 32; ++i)
129 do_test (&json_ctx, 0, 0, i);
130 do_test (&json_ctx, i, 0, i);
131 do_test (&json_ctx, 0, i, i);
132 do_test (&json_ctx, i, i, i);
135 for (i = 3; i < 32; ++i)
137 if ((i & (i - 1)) == 0)
139 do_test (&json_ctx, 0, 0, 16 * i);
140 do_test (&json_ctx, i, 0, 16 * i);
141 do_test (&json_ctx, 0, i, 16 * i);
142 do_test (&json_ctx, i, i, 16 * i);
145 for (i = 32; i < 64; ++i)
147 do_test (&json_ctx, 0, 0, 32 * i);
148 do_test (&json_ctx, i, 0, 32 * i);
149 do_test (&json_ctx, 0, i, 32 * i);
150 do_test (&json_ctx, i, i, 32 * i);
153 do_test (&json_ctx, 0, 0, getpagesize ());
155 json_array_end (&json_ctx);
156 json_attr_object_end (&json_ctx);
157 json_attr_object_end (&json_ctx);
158 json_document_end (&json_ctx);
163 #include <support/test-driver.c>