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| author | Steven Rostedt <srostedt@redhat.com> | 2010-10-08 17:51:48 (GMT) |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2010-10-19 17:22:36 (GMT) |
| commit | 747e94ae3d1b4c9bf5380e569f614eb9040b79e7 (patch) | |
| tree | 29404444fa5106e6d3361fc6c85b4463777ec3a3 /mm/util.c | |
| parent | 51ea8a88aae425915b458bfe295f1f10a3d52781 (diff) | |
| download | linux-747e94ae3d1b4c9bf5380e569f614eb9040b79e7.tar.xz | |
ring-buffer: Make write slow path out of line
Gcc inlines the slow path of the ring buffer write which can
hurt performance. This patch simply forces the slow path function
rb_move_tail() to always be a function.
The ring_buffer_benchmark module with reader_disabled=1 shows that
this patch changes the time to record an event from 135 ns to
132 ns. (3 ns or 2.22% improvement)
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'mm/util.c')
0 files changed, 0 insertions, 0 deletions