linux-kernel - Re: [PATCH 1/2] perf, tools, stat: Initialize statistics correctly

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Date:	Wed, 9 Apr 2014 15:42:42 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	acme@...radead.org, mingo@...nel.org, linux-kernel@...r.kernel.org,
	peterz@...radead.org, eranian@...gle.com, namhyung@...nel.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 1/2] perf, tools, stat: Initialize statistics correctly

On Tue, Mar 25, 2014 at 10:31:38AM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> perf stat did initialize the stats structure used to compute
> stddev etc. incorrectly. It merely zeroes it. But one member
> (min) needs to be set to a non zero value. This causes min
> to be not computed at all. Call init_stats() correctly.
> 
> It doesn't matter for stat currently because it doesn't use
> min, but it's still better to do it correctly.
> 
> The other users of statistics are already correct.
> 
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>

Acked-by: Jiri Olsa <jolsa@...hat.com>

thanks,
jirka
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