linux-kernel - Re: [PATCH 4/9] perf stat: Remove transaction

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Date:	Wed, 3 Jun 2015 17:14:50 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Jiri Olsa <jolsa@...nel.org>, lkml <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	David Ahern <dsahern@...il.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Andi Kleen <ak@...ux.intel.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 4/9] perf stat: Remove transaction_run from shadow
 update/print code

On Wed, Jun 03, 2015 at 12:10:38PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Wed, Jun 03, 2015 at 04:25:54PM +0200, Jiri Olsa escreveu:
> > It's no longer needed, because we use nameid to recognize
> > transaction events.
> > 
> > Keeping it only in stat code to initialize transaction events.
> 
> Lemme see if I understand this correctly, this update_shadow_stats() is
> called only for transaction runs?
> 
> It doesn't seem so, so now we will update those stats all the time?

update_shadow_stats is called on currently read/processed
counter and based on its 'type' we update various other
counters - shadow counters - which are the base for things
like IPC in the stat output

jirka
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