linux-kernel - Re: Cycles annotation support for perf tools

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Message-ID: <20150524185500.GA5792@krava.redhat.com>
Date:	Sun, 24 May 2015 20:55:00 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	acme@...nel.org, linux-kernel@...r.kernel.org, namhyung@...nel.org,
	eranian@...gle.com
Subject: Re: Cycles annotation support for perf tools

On Sun, May 10, 2015 at 06:51:56AM -0700, Andi Kleen wrote:
> The upcoming Skylake CPU has a new timed branch stack feature,
> that reports cycle counts for individual branches in the
> last branch record.
> 
> This allows to get fine grained cost information for code, and also allows
> to compute fine grained IPC.
> 
> This patchkit adds support for this in the perf tools:
> - Basic support for the cycles field like other branch fields
> - Show cycles in the standard branch sort view (no IPC here,
>   as IPC needs the instruction counts from annotation)
> - Annotate cycles and IPC in the assembler annotate view
> - Add branch support to top, so we can do live annotation.
> - Misc support, like dumping it in perf report -D

hi,
do you have a branch with this change?

thanks,
jirka
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