linux-kernel - Re: [PATCH 04/11] perf, tools, report: Add infrastructure for a cycles histogram

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Date:	Mon, 1 Jun 2015 16:19:41 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	acme@...nel.org, namhyung@...nel.org, eranian@...gle.com,
	linux-kernel@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 04/11] perf, tools, report: Add infrastructure for a
 cycles histogram

On Wed, May 27, 2015 at 10:51:47AM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> This adds the basic infrastructure to keep track of cycle counts
> per basic block for annotate. We allocate an array similar to the
> normal accounting, and then account branch cycles there.
> 
> We handle two cases:
> cycles per basic block with start and cycles per branch
> (these are later used for either IPC or just cycles per BB)
> 
> In the start case we cannot handle overlaps, so always the longest
> basic block wins.
> 
> For the cycles per branch case everything is accurately accounted.
> 
> v2: Remove unnecessary checks. Slight restructure. Move
> symbol__get_annotation to another patch. Move histogram allocation.
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>

Acked-by: Jiri Olsa <jolsa@...nel.org>

thanks,
jirka
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