]> git.karo-electronics.de Git - linux-beck.git/commit
perf events: Precalculate the header space for PERF_SAMPLE_ fields
authorArnaldo Carvalho de Melo <acme@redhat.com>
Wed, 20 Oct 2010 14:50:11 +0000 (12:50 -0200)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Tue, 30 Nov 2010 21:19:04 +0000 (19:19 -0200)
commitc320c7b7d380e630f595de1236d9d085b035d5b4
treee1544fa8cc259a1d300fac9104dd3c46458572fe
parent068ffaa8bfb67c2ddb3ecaf38cc90f94a1a92fe3
perf events: Precalculate the header space for PERF_SAMPLE_ fields

PERF_SAMPLE_{CALLCHAIN,RAW} have variable lenghts per sample, but the others
can be precalculated, reducing a bit the per sample cost.

Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Ian Munsie <imunsie@au1.ibm.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
include/linux/perf_event.h
kernel/perf_event.c