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| author | Steven Rostedt <srostedt@redhat.com> | 2012-11-02 22:33:05 (GMT) |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2013-01-23 04:38:03 (GMT) |
| commit | 567cd4da54ff45513d2ca1f0e3cb9ba45b66d6cf (patch) | |
| tree | 1a9e719a31643138fa76ecf556401fee1f536813 /kernel/rwsem.c | |
| parent | 897f68a48b1f8fb6cb7493e1ee37e3ed7f879937 (diff) | |
| download | linux-567cd4da54ff45513d2ca1f0e3cb9ba45b66d6cf.tar.xz | |
ring-buffer: User context bit recursion checking
Using context bit recursion checking, we can help increase the
performance of the ring buffer.
Before this patch:
# echo function > /debug/tracing/current_tracer
# for i in `seq 10`; do ./hackbench 50; done
Time: 10.285
Time: 10.407
Time: 10.243
Time: 10.372
Time: 10.380
Time: 10.198
Time: 10.272
Time: 10.354
Time: 10.248
Time: 10.253
(average: 10.3012)
Now we have:
# echo function > /debug/tracing/current_tracer
# for i in `seq 10`; do ./hackbench 50; done
Time: 9.712
Time: 9.824
Time: 9.861
Time: 9.827
Time: 9.962
Time: 9.905
Time: 9.886
Time: 10.088
Time: 9.861
Time: 9.834
(average: 9.876)
a 4% savings!
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/rwsem.c')
0 files changed, 0 insertions, 0 deletions