From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Fri, 2 Apr 2010 12:50:42 +0000 (-0300)
Subject: perf hist: Only allocate callchain_node if processing callchains
X-Git-Tag: v2.6.35-rc1~522^2~127^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b9fb93047756c5e4129dfda7591612de61b0e877;p=pandora-kernel.git

perf hist: Only allocate callchain_node if processing callchains

The struct callchain_node size is 120 bytes, that are never used when
there are no callchains or '-g none' is specified, so conditionally
allocate it, reducing sizeof(struct hist_entry) from 210 bytes to only
96, greatly speeding the non-callchain processing.

LKML-Reference: <new-submission>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---

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