tree 76e66aed31494cdf9f287011bbe1025f21910dac
parent 71cf8b8ff7d6a79af086be9e4c72628da9d62d58
author Arnaldo Carvalho de Melo <acme@redhat.com> 1270212642 -0300
committer Arnaldo Carvalho de Melo <acme@redhat.com> 1270236508 -0300

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>