1 | /* Measure memmove 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 | #define BASE_PAGE_SIZE (1024 * 1024) |
20 | #define START_SIZE (4 * 1024) |
21 | #define MIN_PAGE_SIZE (getpagesize () + 16 * 1024 * 1024) |
22 | #define TEST_MAIN |
23 | #define TEST_NAME "memmove" |
24 | #define TIMEOUT (20 * 60) |
25 | #include "bench-string.h" |
26 | #include "json-lib.h" |
27 | |
28 | IMPL (memmove, 1) |
29 | |
30 | typedef char *(*proto_t) (char *, const char *, size_t); |
31 | |
32 | static void |
33 | do_one_test (json_ctx_t *json_ctx, impl_t *impl, char *dst, char *src, |
34 | size_t len) |
35 | { |
36 | size_t i, iters = 16; |
37 | timing_t start, stop, cur; |
38 | |
39 | TIMING_NOW (start); |
40 | for (i = 0; i < iters; ++i) |
41 | { |
42 | CALL (impl, dst, src, len); |
43 | } |
44 | TIMING_NOW (stop); |
45 | |
46 | TIMING_DIFF (cur, start, stop); |
47 | |
48 | json_element_double (ctx: json_ctx, d: (double) cur / (double) iters); |
49 | } |
50 | |
51 | static void |
52 | do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len) |
53 | { |
54 | size_t i, j; |
55 | char *s1, *s2; |
56 | |
57 | align1 &= 127; |
58 | if (align1 + len >= page_size) |
59 | return; |
60 | |
61 | align2 &= 127; |
62 | if (align2 + len >= page_size) |
63 | return; |
64 | |
65 | s1 = (char *) (buf2 + align1); |
66 | s2 = (char *) (buf2 + align2); |
67 | |
68 | for (i = 0, j = 1; i < len; i++, j += 23) |
69 | s1[i] = j; |
70 | |
71 | json_element_object_begin (ctx: json_ctx); |
72 | json_attr_uint (ctx: json_ctx, name: "length" , d: (double) len); |
73 | json_attr_uint (ctx: json_ctx, name: "align1" , d: (double) align1); |
74 | json_attr_uint (ctx: json_ctx, name: "align2" , d: (double) align2); |
75 | json_array_begin (ctx: json_ctx, name: "timings" ); |
76 | |
77 | FOR_EACH_IMPL (impl, 0) |
78 | do_one_test (json_ctx, impl, dst: s2, src: s1, len); |
79 | |
80 | json_array_end (ctx: json_ctx); |
81 | json_element_object_end (ctx: json_ctx); |
82 | } |
83 | |
84 | int |
85 | test_main (void) |
86 | { |
87 | json_ctx_t json_ctx; |
88 | size_t i; |
89 | |
90 | test_init (); |
91 | |
92 | json_init (ctx: &json_ctx, indent_level: 0, stdout); |
93 | |
94 | json_document_begin (ctx: &json_ctx); |
95 | json_attr_string (ctx: &json_ctx, name: "timing_type" , TIMING_TYPE); |
96 | |
97 | json_attr_object_begin (ctx: &json_ctx, name: "functions" ); |
98 | json_attr_object_begin (ctx: &json_ctx, name: "memmove" ); |
99 | json_attr_string (ctx: &json_ctx, name: "bench-variant" , s: "large" ); |
100 | |
101 | json_array_begin (ctx: &json_ctx, name: "ifuncs" ); |
102 | |
103 | FOR_EACH_IMPL (impl, 0) |
104 | json_element_string (ctx: &json_ctx, s: impl->name); |
105 | json_array_end (ctx: &json_ctx); |
106 | |
107 | json_array_begin (ctx: &json_ctx, name: "results" ); |
108 | for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1) |
109 | { |
110 | do_test (json_ctx: &json_ctx, align1: 0, align2: 64, len: i + 7); |
111 | do_test (json_ctx: &json_ctx, align1: 0, align2: 3, len: i + 15); |
112 | do_test (json_ctx: &json_ctx, align1: 3, align2: 0, len: i + 31); |
113 | do_test (json_ctx: &json_ctx, align1: 3, align2: 7, len: i + 63); |
114 | do_test (json_ctx: &json_ctx, align1: 9, align2: 5, len: i + 127); |
115 | } |
116 | |
117 | json_array_end (ctx: &json_ctx); |
118 | json_attr_object_end (ctx: &json_ctx); |
119 | json_attr_object_end (ctx: &json_ctx); |
120 | json_document_end (ctx: &json_ctx); |
121 | |
122 | return ret; |
123 | } |
124 | |
125 | #include <support/test-driver.c> |
126 | |