linux-kernel - Re: [PATCH 1/3] perf/e6500: Make event translations available in sysfs

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Date:	Mon, 9 Feb 2015 11:07:38 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Tom Huynh <tom.huynh@...escale.com>, benh@...nel.crashing.org,
	paulus@...ba.org, mpe@...erman.id.au, mingo@...hat.com,
	acme@...nel.org, Kim.Phillips@...escale.com,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	jolsa@...hat.com
Subject: Re: [PATCH 1/3] perf/e6500: Make event translations available in
 sysfs


* Peter Zijlstra <peterz@...radead.org> wrote:

> On Fri, Feb 06, 2015 at 04:43:54PM -0600, Tom Huynh wrote:
> >  arch/powerpc/perf/e6500-events-list.h         | 289 ++++++++++++++++++++++++++
> 
> That's a lot of events to stuff in the kernel, would a 
> userspace list not be more convenient?
> 
> ISTR there being various discussions on providing support 
> for that in tools/perf, Jiri?

As long as it's in a single well organized place in tools/, 
I'd be fine with that solution as well.

What doesn't work very well is disjunct, disorganized, 
inconsistent event descriptions all across the tooling and 
platform landscape - putting static tables into sysfs is a 
marked improvement over that, despite its memory usage.

Thanks,

	Ingo
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