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| author | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2017-11-20 17:55:59 +0530 |
|---|---|---|
| committer | Siddhesh Poyarekar <siddhesh@sourceware.org> | 2017-11-20 18:03:32 +0530 |
| commit | 4d7632ff687dc60fb9ed38bae682d395017b61a8 (patch) | |
| tree | 3ee504482bd103ea4adb3cf2368451b133c9266a /benchtests/bench-memset-walk.c | |
| parent | a465b89ee82642c193cfd7deb6eb5d999ffaa5b7 (diff) | |
| download | glibc-4d7632ff687dc60fb9ed38bae682d395017b61a8.tar.gz | |
benchtests: Fix walking sizes and directions for *-walk benchmarks
Make the walking benchmarks walk only backwards since copying both
ways is biased in favour of implementations that use non-temporal
stores for larger sizes; falkor is one of them. This also fixes up
bugs in computation of the result which ended up multiplying the
length with the timing result unnecessarily.
* benchtests/bench-memcpy-walk.c (do_one_test): Copy only
backwards. Fix timing computation.
* benchtests/bench-memmove-walk.c (do_one_test): Likewise.
* benchtests/bench-memset-walk.c (do_one_test): Walk backwards
on memset by N at a time. Fix timing computation.
Diffstat (limited to 'benchtests/bench-memset-walk.c')
| -rw-r--r-- | benchtests/bench-memset-walk.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/benchtests/bench-memset-walk.c b/benchtests/bench-memset-walk.c index 59d2626f46..80fbe092b8 100644 --- a/benchtests/bench-memset-walk.c +++ b/benchtests/bench-memset-walk.c @@ -66,14 +66,14 @@ do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s, CHAR *s_end, timing_t start, stop, cur; TIMING_NOW (start); - for (i = 0; i < iters && s <= s_end; s++, i++) + for (i = 0; i < iters && s <= s_end; s_end -= n, i++) CALL (impl, s, c, n); TIMING_NOW (stop); TIMING_DIFF (cur, start, stop); /* Get time taken per function call. */ - json_element_double (json_ctx, (double) cur * n / i); + json_element_double (json_ctx, (double) cur / i); } static void |