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| 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.c | |
| parent | 29c933fb35b7bf872f57dc6977c879832983ab6c (diff) | |
| download | glibc-503c92c37a95f769762e65aff9383b302178c2bc.tar.gz glibc-503c92c37a95f769762e65aff9383b302178c2bc.tar.xz 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.c')
| -rw-r--r-- | benchtests/bench-memset.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/benchtests/bench-memset.c b/benchtests/bench-memset.c index 107e2b7494..724c105935 100644 --- a/benchtests/bench-memset.c +++ b/benchtests/bench-memset.c @@ -132,7 +132,10 @@ 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); |