1 | /* Measure memcpy functions with large data sizes. |
2 | Copyright (C) 2016-2022 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 | #ifndef MEMCPY_RESULT |
20 | # define MEMCPY_RESULT(dst, len) dst |
21 | # define START_SIZE (64 * 1024) |
22 | # define MIN_PAGE_SIZE (getpagesize () + 32 * 1024 * 1024) |
23 | # define TEST_MAIN |
24 | # define TEST_NAME "memcpy" |
25 | # define TIMEOUT (20 * 60) |
26 | # include "bench-string.h" |
27 | |
28 | IMPL (memcpy, 1) |
29 | #endif |
30 | |
31 | #include "json-lib.h" |
32 | |
33 | typedef char *(*proto_t) (char *, const char *, size_t); |
34 | |
35 | static void |
36 | do_one_test (json_ctx_t *json_ctx, impl_t *impl, char *dst, const char *src, |
37 | size_t len) |
38 | { |
39 | size_t i, iters = 16; |
40 | timing_t start, stop, cur; |
41 | |
42 | TIMING_NOW (start); |
43 | for (i = 0; i < iters; ++i) |
44 | { |
45 | CALL (impl, dst, src, len); |
46 | } |
47 | TIMING_NOW (stop); |
48 | |
49 | TIMING_DIFF (cur, start, stop); |
50 | |
51 | json_element_double (ctx: json_ctx, d: (double) cur / (double) iters); |
52 | } |
53 | |
54 | static void |
55 | do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len, |
56 | int both_ways) |
57 | { |
58 | size_t i, j; |
59 | char *s1, *s2; |
60 | size_t repeats; |
61 | align1 &= 4095; |
62 | if (align1 + len >= page_size) |
63 | return; |
64 | |
65 | align2 &= 4095; |
66 | if (align2 + len >= page_size) |
67 | return; |
68 | |
69 | s1 = (char *) (buf1 + align1); |
70 | s2 = (char *) (buf2 + align2); |
71 | |
72 | for (repeats = both_ways ? 2 : 1; repeats; --repeats) |
73 | { |
74 | for (i = 0, j = 1; i < len; i++, j += 23) |
75 | s1[i] = j; |
76 | |
77 | json_element_object_begin (ctx: json_ctx); |
78 | json_attr_uint (ctx: json_ctx, name: "length" , d: (double) len); |
79 | json_attr_uint (ctx: json_ctx, name: "align1" , d: (double) align1); |
80 | json_attr_uint (ctx: json_ctx, name: "align2" , d: (double) align2); |
81 | json_attr_uint (ctx: json_ctx, name: "dst > src" , d: (double) (s2 > s1)); |
82 | json_array_begin (ctx: json_ctx, name: "timings" ); |
83 | |
84 | FOR_EACH_IMPL (impl, 0) |
85 | do_one_test (json_ctx, impl, dst: s2, src: s1, len); |
86 | |
87 | json_array_end (ctx: json_ctx); |
88 | json_element_object_end (ctx: json_ctx); |
89 | |
90 | s1 = (char *) (buf2 + align1); |
91 | s2 = (char *) (buf1 + align2); |
92 | } |
93 | } |
94 | |
95 | int |
96 | test_main (void) |
97 | { |
98 | json_ctx_t json_ctx; |
99 | size_t i; |
100 | |
101 | test_init (); |
102 | |
103 | json_init (ctx: &json_ctx, indent_level: 0, stdout); |
104 | |
105 | json_document_begin (ctx: &json_ctx); |
106 | json_attr_string (ctx: &json_ctx, name: "timing_type" , TIMING_TYPE); |
107 | |
108 | json_attr_object_begin (ctx: &json_ctx, name: "functions" ); |
109 | json_attr_object_begin (ctx: &json_ctx, TEST_NAME); |
110 | json_attr_string (ctx: &json_ctx, name: "bench-variant" , s: "large" ); |
111 | |
112 | json_array_begin (ctx: &json_ctx, name: "ifuncs" ); |
113 | FOR_EACH_IMPL (impl, 0) |
114 | json_element_string (ctx: &json_ctx, s: impl->name); |
115 | json_array_end (ctx: &json_ctx); |
116 | |
117 | json_array_begin (ctx: &json_ctx, name: "results" ); |
118 | for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1) |
119 | { |
120 | do_test (json_ctx: &json_ctx, align1: 0, align2: 0, len: i + 7, both_ways: 1); |
121 | do_test (json_ctx: &json_ctx, align1: 0, align2: 3, len: i + 15, both_ways: 1); |
122 | do_test (json_ctx: &json_ctx, align1: 3, align2: 0, len: i + 31, both_ways: 1); |
123 | do_test (json_ctx: &json_ctx, align1: 3, align2: 5, len: i + 63, both_ways: 1); |
124 | do_test (json_ctx: &json_ctx, align1: 0, align2: 127, len: i, both_ways: 1); |
125 | do_test (json_ctx: &json_ctx, align1: 0, align2: 255, len: i, both_ways: 1); |
126 | do_test (json_ctx: &json_ctx, align1: 0, align2: 256, len: i, both_ways: 1); |
127 | do_test (json_ctx: &json_ctx, align1: 0, align2: 4064, len: i, both_ways: 1); |
128 | } |
129 | |
130 | json_array_end (ctx: &json_ctx); |
131 | json_attr_object_end (ctx: &json_ctx); |
132 | json_attr_object_end (ctx: &json_ctx); |
133 | json_document_end (ctx: &json_ctx); |
134 | |
135 | return ret; |
136 | } |
137 | |
138 | #include <support/test-driver.c> |
139 | |