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319dddc1 | 1 | /* Actual benchmark kernels used by bench-hash-funcs.h |
6d7e8eda | 2 | Copyright (C) 2022-2023 Free Software Foundation, Inc. |
319dddc1 NG |
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 | ||
5d765ada | 20 | #include "bench-util.h" |
319dddc1 NG |
21 | |
22 | /* We go through the trouble of using macros here because many of the | |
23 | hash functions are meant to be inlined so its not fair to benchmark | |
24 | them with a function pointer where they won't be inlinable. */ | |
25 | #undef RUN_FUNC | |
26 | #undef POSTFIX | |
27 | #ifdef SIMPLE | |
28 | # define RUN_FUNC SIMPLE_TEST_FUNC | |
29 | # define POSTFIX _simple | |
30 | #else | |
31 | # define RUN_FUNC TEST_FUNC | |
32 | # define POSTFIX _optimized | |
33 | #endif | |
34 | ||
35 | #define PRIMITIVE_CAT(x, y) x ## y | |
36 | #define CAT(x, y) PRIMITIVE_CAT (x, y) | |
37 | ||
38 | static double __attribute__ ((noinline, noclone)) | |
39 | CAT (do_one_test_kernel, POSTFIX) (const char *s, size_t len) | |
40 | { | |
41 | ||
42 | unsigned int iters; | |
43 | timing_t start, stop, cur; | |
44 | ||
45 | /* Warmup. */ | |
46 | for (iters = NFIXED_ITERS / 32; iters; --iters) | |
47 | DO_NOT_OPTIMIZE_OUT (RUN_FUNC (s, len)); | |
48 | ||
49 | TIMING_NOW (start); | |
50 | for (iters = NFIXED_ITERS; iters; --iters) | |
51 | DO_NOT_OPTIMIZE_OUT (RUN_FUNC (s, len)); | |
52 | ||
53 | TIMING_NOW (stop); | |
54 | ||
55 | TIMING_DIFF (cur, start, stop); | |
56 | ||
57 | (void) (len); | |
58 | return (double) cur / (double) NFIXED_ITERS; | |
59 | } | |
60 | ||
61 | static double __attribute__ ((noinline, noclone)) | |
62 | CAT (do_rand_test_kernel, POSTFIX) (char const *bufs, | |
63 | unsigned int const *sizes) | |
64 | { | |
65 | unsigned int i, iters; | |
66 | size_t offset; | |
67 | timing_t start, stop, cur; | |
68 | ||
69 | /* Warmup. */ | |
70 | for (i = 0, offset = 0; i < NRAND_BUFS; ++i, offset += RAND_BENCH_MAX_LEN) | |
71 | DO_NOT_OPTIMIZE_OUT (RUN_FUNC (bufs + offset, sizes[i])); | |
72 | ||
73 | TIMING_NOW (start); | |
74 | for (iters = NRAND_ITERS; iters; --iters) | |
75 | { | |
76 | for (i = 0, offset = 0; i < NRAND_BUFS; | |
77 | ++i, offset += RAND_BENCH_MAX_LEN) | |
78 | DO_NOT_OPTIMIZE_OUT (RUN_FUNC (bufs + offset, sizes[i])); | |
79 | ||
80 | } | |
81 | TIMING_NOW (stop); | |
82 | ||
83 | TIMING_DIFF (cur, start, stop); | |
84 | ||
85 | (void) (sizes); | |
86 | return (double) cur / (double) (NRAND_ITERS * NRAND_BUFS); | |
87 | } |