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/* Benchmark utility functions.
Copyright (C) 2015-2024 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/>. */
/* Prevent compiler to optimize away call. */
#define DO_NOT_OPTIMIZE_OUT(value) \
({ \
__typeof (value) __v = (value); \
asm volatile ("" : : "r,m" (__v) : "memory"); \
__v; \
})
#ifndef START_ITER
# define START_ITER (100000000)
#endif
/* bench_start reduces the random variations due to frequency scaling by
executing a small loop with many memory accesses. START_ITER controls
the number of iterations. */
void bench_start (void);
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