mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-29 05:51:10 +00:00
36 lines
1.3 KiB
C
36 lines
1.3 KiB
C
/* Benchmark utility functions.
|
|
Copyright (C) 2015-2023 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/>. */
|
|
|
|
/* 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);
|