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| author |   Christophe Leroy <christophe.leroy@c-s.fr> | 2015-09-22 16:34:32 +0200 |
|---|---|---|
| committer |   Scott Wood <oss@buserror.net> | 2016-03-04 23:03:45 -0600 |
| commit | f867d556dd8525fe6ff0d22a34249528e590f994 (patch) | |
| tree | 32ebba9cfc1b00d1f394b480d5cfab443382864e /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | powerpc32: optimise a few instructions in csum_partial() (diff) | |
| download | wireguard-linux-f867d556dd8525fe6ff0d22a34249528e590f994.tar.xz wireguard-linux-f867d556dd8525fe6ff0d22a34249528e590f994.zip | |
powerpc32: optimise csum_partial() loop
On the 8xx, load latency is 2 cycles and taking branches also takes
2 cycles. So let's unroll the loop.
This patch improves csum_partial() speed by around 10% on both:
* 8xx (single issue processor with parallel execution)
* 83xx (superscalar 6xx processor with dual instruction fetch
and parallel execution)
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <oss@buserror.net>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions