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Date: Wed, 20 Nov 2002 22:53:36 +0100
From: Stephan von Krawczynski <skraw@ithnet.com>
To: Dave Jones <davej@codemonkey.org.uk>
Cc: gallir@uib.es, linux-kernel@vger.kernel.org, marcelo@conectiva.com.br
Subject: Re: PATCH: Recognize Tualatin cache size in 2.4.x
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On Wed, 20 Nov 2002 21:41:04 +0000
Dave Jones <davej@codemonkey.org.uk> wrote:

> On Wed, Nov 20, 2002 at 09:03:57PM +0100, Stephan von Krawczynski wrote:
>  > On Tue, 19 Nov 2002 12:08:34 +0000
>  > Dave Jones <davej@codemonkey.org.uk> wrote:
>  > 
>  > > On Mon, Nov 18, 2002 at 09:54:52PM +0100, Ricardo Galli wrote:
>  > > 
>  > >  > It's very cosmetic but very annoying for P3 > 1GHz, where Linux <= 2.4.20-preX 
>  > >  > only reports 32 KB of cache and it also seems to ignore the "cachesize" 
>  > >  > parameter. Perhaps it really uses 256KB, but not sure.
>  > > 
>  > > There was a bug related to that parameter, I'm sure if the fix
>  > > went into the same patch, or a separate one. I'll check later.
>  > 
>  > Sorry for this possibly dumb comment/question:
>  > my Tualatins have 512KB cache on die. Are we all sure that it's used?
>  > /proc says indeed 32KB on 2.4.20-rc2
> 
> Odd. If you can send me the output of dmesg, /proc/cpuinfo
> and x86info -a, I'll take a look.
> (You can find x86info at
>  http://www.codemonkey.org.uk/x86info/x86info-1.11.tar.gz)

Hi Dave,

I just tested your descriptors.diff, and here are the results:
(make dep clean bzImage modules modules_install, all same tree of course)

2.4.20-rc2:
real  5m27.670s   user  5m6.450s   sys  0m18.710s
real  5m27.590s   user  5m6.760s   sys  0m18.660s
real  5m27.953s   user  5m6.900s   sys  0m18.310s

2.4.20-rc2 with descriptors.diff:

real  5m29.005s   user  5m8.540s   sys  0m18.610s
real  5m27.752s   user  5m8.760s   sys  0m17.870s
real  5m29.021s   user  5m8.210s   sys  0m18.540s

Doesn't really look more than cosmetic, does it?
/proc output is correct with your diff.

Regards,
Stephan

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