diff options
| author |   Siddhesh Poyarekar <siddhesh@sourceware.org> | 2017-09-14 22:39:49 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2017-09-14 22:54:24 +0530 |
| commit | 503c92c37a95f769762e65aff9383b302178c2bc (patch) | |
| tree | 6374607403822c719c9e0719e549478b378557c0 /benchtests/bench-memset-large.c | |
| parent | benchtests: Make memset benchmarks print json (diff) | |
| download | glibc-503c92c37a95f769762e65aff9383b302178c2bc.tar.gz glibc-503c92c37a95f769762e65aff9383b302178c2bc.tar.bz2 glibc-503c92c37a95f769762e65aff9383b302178c2bc.zip | |
benchtests: Reallocate buffers for memset
Keeping the same buffers along with copying the same size of data into
the same location means that the first routine is typically the
slowest since it has to bear the cost of fetching data into to cache.
Reallocating buffers stabilizes numbers by a bit.
* benchtests/bench-string.h (realloc_bufs): New function.
(test_init): Call it.
* benchtests/bench-memset-large.c (do_test): Likewise.
* benchtests/bench-memset.c (do_test): Likewise.
Diffstat (limited to 'benchtests/bench-memset-large.c')
| -rw-r--r-- | benchtests/bench-memset-large.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/benchtests/bench-memset-large.c b/benchtests/bench-memset-large.c index c0f19749f6..6cd48c99ea 100644 --- a/benchtests/bench-memset-large.c +++ b/benchtests/bench-memset-large.c @@ -90,7 +90,10 @@ do_test (json_ctx_t *json_ctx, size_t align, int c, size_t len) json_array_begin (json_ctx, "timings"); FOR_EACH_IMPL (impl, 0) - do_one_test (json_ctx, impl, (CHAR *) (buf1) + align, c, len); + { + do_one_test (json_ctx, impl, (CHAR *) (buf1) + align, c, len); + realloc_bufs (); + } json_array_end (json_ctx); json_element_object_end (json_ctx); |