mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-27 03:41:23 +08:00
88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
/* Actual benchmark kernels used by bench-hash-funcs.h
|
|
Copyright (C) 2022-2023 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
|
|
#include "bench-util.h"
|
|
|
|
/* We go through the trouble of using macros here because many of the
|
|
hash functions are meant to be inlined so its not fair to benchmark
|
|
them with a function pointer where they won't be inlinable. */
|
|
#undef RUN_FUNC
|
|
#undef POSTFIX
|
|
#ifdef SIMPLE
|
|
# define RUN_FUNC SIMPLE_TEST_FUNC
|
|
# define POSTFIX _simple
|
|
#else
|
|
# define RUN_FUNC TEST_FUNC
|
|
# define POSTFIX _optimized
|
|
#endif
|
|
|
|
#define PRIMITIVE_CAT(x, y) x ## y
|
|
#define CAT(x, y) PRIMITIVE_CAT (x, y)
|
|
|
|
static double __attribute__ ((noinline, noclone))
|
|
CAT (do_one_test_kernel, POSTFIX) (const char *s, size_t len)
|
|
{
|
|
|
|
unsigned int iters;
|
|
timing_t start, stop, cur;
|
|
|
|
/* Warmup. */
|
|
for (iters = NFIXED_ITERS / 32; iters; --iters)
|
|
DO_NOT_OPTIMIZE_OUT (RUN_FUNC (s, len));
|
|
|
|
TIMING_NOW (start);
|
|
for (iters = NFIXED_ITERS; iters; --iters)
|
|
DO_NOT_OPTIMIZE_OUT (RUN_FUNC (s, len));
|
|
|
|
TIMING_NOW (stop);
|
|
|
|
TIMING_DIFF (cur, start, stop);
|
|
|
|
(void) (len);
|
|
return (double) cur / (double) NFIXED_ITERS;
|
|
}
|
|
|
|
static double __attribute__ ((noinline, noclone))
|
|
CAT (do_rand_test_kernel, POSTFIX) (char const *bufs,
|
|
unsigned int const *sizes)
|
|
{
|
|
unsigned int i, iters;
|
|
size_t offset;
|
|
timing_t start, stop, cur;
|
|
|
|
/* Warmup. */
|
|
for (i = 0, offset = 0; i < NRAND_BUFS; ++i, offset += RAND_BENCH_MAX_LEN)
|
|
DO_NOT_OPTIMIZE_OUT (RUN_FUNC (bufs + offset, sizes[i]));
|
|
|
|
TIMING_NOW (start);
|
|
for (iters = NRAND_ITERS; iters; --iters)
|
|
{
|
|
for (i = 0, offset = 0; i < NRAND_BUFS;
|
|
++i, offset += RAND_BENCH_MAX_LEN)
|
|
DO_NOT_OPTIMIZE_OUT (RUN_FUNC (bufs + offset, sizes[i]));
|
|
|
|
}
|
|
TIMING_NOW (stop);
|
|
|
|
TIMING_DIFF (cur, start, stop);
|
|
|
|
(void) (sizes);
|
|
return (double) cur / (double) (NRAND_ITERS * NRAND_BUFS);
|
|
}
|