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Benchtests: Remove simple_mem(r)chr

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Instead of benchmarking slow byte oriented loops, include the optimized
generic memchr/memrchr implementation.  Adjust iteration count to reduce
benchmark time.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Wilco Dijkstra 2023-03-03 12:54:45 +00:00
parent 73a284f618
commit dcfcb8e392
2 changed files with 26 additions and 30 deletions
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40
benchtests/bench-memchr.c
View file

@ -16,6 +16,8 @@
License along with the GNU C Library; if not, see License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */ <https://www.gnu.org/licenses/>. */
#include "json-lib.h"
#ifndef WIDE #ifndef WIDE
# define SMALL_CHAR 127 # define SMALL_CHAR 127
#else #else
@ -31,35 +33,25 @@
# endif /* WIDE */ # endif /* WIDE */
# include "bench-string.h" # include "bench-string.h"
# ifndef WIDE typedef void *(*proto_t) (const void *, int, size_t);
# define SIMPLE_MEMCHR simple_memchr
# else
# define SIMPLE_MEMCHR simple_wmemchr
# endif /* WIDE */
typedef CHAR *(*proto_t) (const CHAR *, int, size_t); void *
CHAR *SIMPLE_MEMCHR (const CHAR *, int, size_t); generic_memchr (const void *, int, size_t);
IMPL (SIMPLE_MEMCHR, 0)
IMPL (MEMCHR, 1) IMPL (MEMCHR, 1)
CHAR * # ifndef WIDE
SIMPLE_MEMCHR (const CHAR *s, int c, size_t n) IMPL (generic_memchr, 0)
{ # endif
while (n--)
if (*s++ == (CHAR) c)
return (CHAR *) s - 1;
return NULL;
}
#endif /* !USE_AS_MEMRCHR */ #endif /* !USE_AS_MEMRCHR */
#include "json-lib.h"
static void static void
do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s, int c, do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s, int c,
size_t n) size_t n)
{ {
size_t i, iters = INNER_LOOP_ITERS_LARGE; size_t i, iters = INNER_LOOP_ITERS;
timing_t start, stop, cur; timing_t start, stop, cur;
TIMING_NOW (start); TIMING_NOW (start);
@ -250,3 +242,15 @@ test_main (void)
} }
#include <support/test-driver.c> #include <support/test-driver.c>
#ifndef WIDE
# ifndef USE_AS_MEMRCHR
# undef MEMCHR
# define MEMCHR generic_memchr
# include <string/memchr.c>
# else
# undef MEMRCHR
# define MEMRCHR generic_memrchr
# include <string/memrchr.c>
# endif
#endif

16
benchtests/bench-memrchr.c
View file

@ -21,20 +21,12 @@
#include "bench-string.h" #include "bench-string.h"
typedef char *(*proto_t) (const char *, int, size_t); typedef char *(*proto_t) (const char *, int, size_t);
char *simple_memrchr (const char *, int, size_t);
IMPL (simple_memrchr, 0) void *
generic_memrchr (const void *, int, size_t);
IMPL (memrchr, 1) IMPL (memrchr, 1)
IMPL (generic_memrchr, 0)
char *
simple_memrchr (const char *s, int c, size_t n)
{
s = s + n;
while (n--)
if (*--s == (char) c)
return (char *) s;
return NULL;
}
#define USE_AS_MEMRCHR #define USE_AS_MEMRCHR
#include "bench-memchr.c" #include "bench-memchr.c"