From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Wed, 20 Oct 2010 14:50:11 +0000 (-0200)
Subject: perf events: Precalculate the header space for PERF_SAMPLE_ fields
X-Git-Tag: v2.6.38-rc1~490^2~66
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c320c7b7d380e630f595de1236d9d085b035d5b4;p=pandora-kernel.git

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>
---

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