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/* Actual benchmark kernels used by bench-hash-funcs.h
Copyright (C) 2022 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/>. */
/* 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);
}
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