linux-kernel - Re: [PATCH V5 0/13] perf: Intel uncore pmu counting support

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Message-ID: <20120613073846.GA8057@gmail.com>
Date:	Wed, 13 Jun 2012 09:38:46 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	"Yan, Zheng" <zheng.z.yan@...el.com>, a.p.zijlstra@...llo.nl,
	mingo@...e.hu, jolsa@...hat.com, andi@...stfloor.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V5 0/13] perf: Intel uncore pmu counting support


* Stephane Eranian <eranian@...gle.com> wrote:

> > Peter suggests keeping the uncore names as they're listed in 
> > the intel doc. For Sandybirdge-EP, uncore names are 
> > something like: Cbo, iMC, QPI. I think Uncore_Cbo_0 appears 
> > better than uncore_Cbo_0
>
> Keeping the name is different from keeping the upper vs. lower 
> case letters. I think this need to be case insensitive. What 
> does it buy you to be case sensitive? Don't think Intel is 
> ever going to create two events which differ only by the lower 
> vs. upper case. And, I think that's extra frustration when you 
> type the event name because you have to also remember the 
> letter case.

Yeah - the right approach is to make it all lowercase in sysfs - 
then user-space can tolower() the string provided by the user.

There should be no case sensitivity in event specifications 
anywhere.

Thanks,

	Ingo
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