linux-kernel - Re: [patch] Performance Counters for Linux, v2

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Message-ID: <4d8e3fd30812090414v2e7a4bc3h621ca56e91ae367@mail.gmail.com>
Date:	Tue, 9 Dec 2008 13:14:11 +0100
From:	"Paolo Ciarrocchi" <paolo.ciarrocchi@...il.com>
To:	"David Miller" <davem@...emloft.net>, "Ingo Molnar" <mingo@...e.hu>
Cc:	eranian@...il.com, linux-kernel@...r.kernel.org,
	tglx@...utronix.de, linux-arch@...r.kernel.org,
	akpm@...ux-foundation.org, dada1@...mosbay.com,
	robert.richter@....com, arjan@...radead.org, hpa@...or.com,
	a.p.zijlstra@...llo.nl, rostedt@...dmis.org, paulus@...ba.org
Subject: Re: [patch] Performance Counters for Linux, v2

On Tue, Dec 9, 2008 at 12:29 PM, David Miller <davem@...emloft.net> wrote:
> From: Ingo Molnar <mingo@...e.hu>
> Date: Tue, 9 Dec 2008 12:22:25 +0100
>
>>
>> * David Miller <davem@...emloft.net> wrote:
>>
>> > From: Ingo Molnar <mingo@...e.hu>
>> > Date: Tue, 9 Dec 2008 12:02:46 +0100
>> >
>> > >
>> > > * stephane eranian <eranian@...glemail.com> wrote:
>> > >
>> > > > > There's also more generic x86 support: all 4 generic PMCs of Nehalem
>> > > > > / Core i7 are supported - i've run 4 instances of KernelTop and they
>> > > > > used up four separate PMCs.
>> > > >
>> > > > Core/Atom have 5 counters, Nehalem has 7. Why are you not using all of
>> > > > them already?
>> > >
>> > > no, Nehalem has 4 generic purpose PMCs and 3 fixed-purpose PMCs (7
>> > > total),
>> >  ...
>> > > Saying that it has 7 is misleading.
>> >
>> > Even you just did.
>>
>> which portion of my point stressing the general purpose attribute was
>> unclear to you?
>
> I'm just teasing you because you picked a trite point from stephane's
> email instead of the meat later on, which I would have found more
> interesting to hear you comment on.

I'm interested in Ingo's comments on that argument as well but I don't
feel the need to act like were are all in a kindergarten.

You are two astonishing developers and I'm sure you can demonstrate
that you can have a pure technical discussion on this topic as you did
several times in the past.

Regards,
-- 
Paolo
http://paolo.ciarrocchi.googlepages.com/
http://mypage.vodafone.it/
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