From: Frederic Weisbecker <fweisbec@gmail.com>
Date: Wed, 14 Apr 2010 20:09:02 +0000 (+0200)
Subject: perf: Make the trace events sample period default to 1
X-Git-Tag: v2.6.35-rc1~522^2~104
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f92128193094c288bc315db1694fafeaeb7ee1d0;p=pandora-kernel.git

perf: Make the trace events sample period default to 1

Trace events are mostly used for tracing and then require not to
be lost when possible. As opposite to hardware events that really
require to trigger after a given sample period, trace events mostly
need to trigger everytime.

It is a frustrating experience to trace with perf and realize we
lost a lot of events because we forgot the "-c 1" option.

Then default sample_period to 1 for trace events but let the user
override it.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
---

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