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Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
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From:
Pavel Machek <pavel@...>
To: Suresh Siddha <suresh.b.siddha@...>
Cc: <mingo@...>, <hpa@...>, <tglx@...>, <andi@...>, <hch@...>, <linux-kernel@...>, Arjan van de Ven <arjan@...>
Subject:
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
Date: Thursday, March 6, 2008 - 5:21 pm
On Thu 2008-03-06 11:26:53, Suresh Siddha wrote:
quoted text
> On Wed, Mar 05, 2008 at 08:48:01PM +0100, Pavel Machek wrote: > > On Mon 2008-03-03 15:02:46, Suresh Siddha wrote: > > > Only allocate the FPU area when the application actually uses FPU, i.e., in the > > > first lazy FPU trap. This could save memory for non-fpu using apps. > > > > How many such apps are on your system, and how much does this > > 'optimalization' cost? > > On a normal kernel boot, where there are 200 or so tasks running, only 20 > or so apps seem to be using FPU.
Aha, now I see it is useful ;-). Pavel -- (english)
http://www.livejournal.com/~pavelmachek
(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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Messages in current thread:
[patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, Suresh Siddha
, (Mon Mar 3, 7:02 pm)
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, Pavel Machek
, (Wed Mar 5, 3:48 pm)
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, Suresh Siddha
, (Thu Mar 6, 3:26 pm)
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, Pavel Machek
, (Thu Mar 6, 5:21 pm)
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, Christoph Hellwig
, (Mon Mar 3, 9:20 pm)
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, Suresh Siddha
, (Mon Mar 3, 9:43 pm)
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, Ingo Molnar
, (Tue Mar 4, 6:32 am)
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, Suresh Siddha
, (Tue Mar 4, 1:55 pm)
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, Pavel Machek
, (Wed Mar 5, 3:47 pm)
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, Ingo Molnar
, (Thu Mar 6, 11:51 am)
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, Pavel Machek
, (Thu Mar 6, 4:24 pm)
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, H. Peter Anvin
, (Fri Mar 7, 8:29 am)
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, Arjan van de Ven
, (Fri Mar 7, 9:06 am)
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, Andi Kleen
, (Fri Mar 7, 9:18 am)
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, Arjan van de Ven
, (Fri Mar 7, 9:20 am)
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, Andi Kleen
, (Fri Mar 7, 9:27 am)
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, Andi Kleen
, (Thu Mar 6, 4:52 pm)
Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
, Suresh Siddha
, (Thu Mar 6, 3:10 pm)
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