linux-kernel - Re: [PATCH 5/7] perf, tools, stat: Implement --metric-only mode

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Date:	Tue, 1 Mar 2016 15:53:42 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Andi Kleen <andi@...stfloor.org>, acme@...nel.org,
	jolsa@...nel.org, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 5/7] perf, tools, stat: Implement --metric-only mode

> > 
> > % perf stat -a -I 1000 --metric-only
> >      1.001452803 frontend cycles idle insn per cycle       stalled cycles per insn branch-misses of all branches
> 
> where does 'frontend' collumn come from?
> can't see it in the code or get it in output..

It comes from the shadow stats. All the columns are collected from
there. Probably your CPU doesn't implement it. I try to hide 
it when it's not supported.

-Andi