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benchtests: Bump start size since smaller sizes are noisy

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Numbers for very small sizes (< 128B) are much noisier for non-cached
benchmarks like the walk benchmarks, so don't include them.

	* benchtests/bench-memcpy-walk.c (START_SIZE): Set to 128.
	* benchtests/bench-memmove-walk.c (START_SIZE): Likewise.
	* benchtests/bench-memset-walk.c (START_SIZE): Likewise.
This commit is contained in:
Siddhesh Poyarekar 2017-11-20 17:56:35 +05:30
parent 4d7632ff68
commit eb332f9feb
4 changed files with 7 additions and 3 deletions
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4
ChangeLog
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@ -1,5 +1,9 @@
2017-11-20 Siddhesh Poyarekar <siddhesh@sourceware.org>
* benchtests/bench-memcpy-walk.c (START_SIZE): Set to 128.
* benchtests/bench-memmove-walk.c (START_SIZE): Likewise.
* benchtests/bench-memset-walk.c (START_SIZE): Likewise.
* benchtests/bench-memcpy-walk.c (do_one_test): Copy only
backwards. Fix timing computation.
* benchtests/bench-memmove-walk.c (do_one_test): Likewise.

2
benchtests/bench-memcpy-walk.c
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@ -29,7 +29,7 @@
#ifndef MEMCPY_RESULT
# define MEMCPY_RESULT(dst, len) dst
# define START_SIZE 1
# define START_SIZE 128
# define MIN_PAGE_SIZE (getpagesize () + 32 * 1024 * 1024)
# define TEST_MAIN
# define TEST_NAME "memcpy"

2
benchtests/bench-memmove-walk.c
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@ -29,7 +29,7 @@
#ifndef MEMMOVE_RESULT
# define MEMMOVE_RESULT(dst, len) dst
# define START_SIZE 1
# define START_SIZE 128
# define MIN_PAGE_SIZE (getpagesize () + 32 * 1024 * 1024)
# define TEST_MAIN
# define TEST_NAME "memmove"

2
benchtests/bench-memset-walk.c
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@ -22,7 +22,7 @@
#else
# define TEST_NAME "wmemset"
#endif /* WIDE */
#define START_SIZE (1)
#define START_SIZE 128
#define MIN_PAGE_SIZE (getpagesize () + 32 * 1024 * 1024)
#define TIMEOUT (20 * 60)
#include "bench-string.h"