| 1 | /* Actual benchmark kernels used by bench-hash-funcs.h |
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| 2 | Copyright (C) 2022-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | |
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| 20 | #include "bench-util.h" |
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| 21 | |
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| 22 | /* We go through the trouble of using macros here because many of the |
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| 23 | hash functions are meant to be inlined so its not fair to benchmark |
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| 24 | them with a function pointer where they won't be inlinable. */ |
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| 25 | #undef RUN_FUNC |
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| 26 | #undef POSTFIX |
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| 27 | #ifdef SIMPLE |
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| 28 | # define RUN_FUNC SIMPLE_TEST_FUNC |
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| 29 | # define POSTFIX _simple |
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| 30 | #else |
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| 31 | # define RUN_FUNC TEST_FUNC |
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| 32 | # define POSTFIX _optimized |
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| 33 | #endif |
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| 34 | |
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| 35 | #define PRIMITIVE_CAT(x, y) x ## y |
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| 36 | #define CAT(x, y) PRIMITIVE_CAT (x, y) |
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| 37 | |
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| 38 | static double __attribute__ ((noinline, noclone)) |
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| 39 | CAT (do_one_test_kernel, POSTFIX) (const char *s, size_t len) |
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| 40 | { |
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| 41 | |
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| 42 | unsigned int iters; |
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| 43 | timing_t start, stop, cur; |
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| 44 | |
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| 45 | /* Warmup. */ |
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| 46 | for (iters = NFIXED_ITERS / 32; iters; --iters) |
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| 47 | DO_NOT_OPTIMIZE_OUT (RUN_FUNC (s, len)); |
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| 48 | |
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| 49 | TIMING_NOW (start); |
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| 50 | for (iters = NFIXED_ITERS; iters; --iters) |
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| 51 | DO_NOT_OPTIMIZE_OUT (RUN_FUNC (s, len)); |
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| 52 | |
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| 53 | TIMING_NOW (stop); |
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| 54 | |
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| 55 | TIMING_DIFF (cur, start, stop); |
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| 56 | |
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| 57 | (void) (len); |
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| 58 | return (double) cur / (double) NFIXED_ITERS; |
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| 59 | } |
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| 60 | |
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| 61 | static double __attribute__ ((noinline, noclone)) |
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| 62 | CAT (do_rand_test_kernel, POSTFIX) (char const *bufs, |
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| 63 | unsigned int const *sizes) |
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| 64 | { |
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| 65 | unsigned int i, iters; |
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| 66 | size_t offset; |
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| 67 | timing_t start, stop, cur; |
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| 68 | |
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| 69 | /* Warmup. */ |
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| 70 | for (i = 0, offset = 0; i < NRAND_BUFS; ++i, offset += RAND_BENCH_MAX_LEN) |
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| 71 | DO_NOT_OPTIMIZE_OUT (RUN_FUNC (bufs + offset, sizes[i])); |
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| 72 | |
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| 73 | TIMING_NOW (start); |
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| 74 | for (iters = NRAND_ITERS; iters; --iters) |
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| 75 | { |
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| 76 | for (i = 0, offset = 0; i < NRAND_BUFS; |
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| 77 | ++i, offset += RAND_BENCH_MAX_LEN) |
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| 78 | DO_NOT_OPTIMIZE_OUT (RUN_FUNC (bufs + offset, sizes[i])); |
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| 79 | |
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| 80 | } |
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| 81 | TIMING_NOW (stop); |
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| 82 | |
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| 83 | TIMING_DIFF (cur, start, stop); |
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| 84 | |
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| 85 | (void) (sizes); |
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| 86 | return (double) cur / (double) (NRAND_ITERS * NRAND_BUFS); |
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| 87 | } |
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| 88 | |
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