linux-kernel - Re: [RFC PATCH] x86, fpu: Use eagerfpu by default on all CPUs

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Message-ID: <20150222132104.GD7529@pd.tnic>
Date:	Sun, 22 Feb 2015 14:21:04 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Andy Lutomirski <luto@...capital.net>,
	Oleg Nesterov <oleg@...hat.com>,
	Rik van Riel <riel@...hat.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>, kbuild-all@...org
Subject: Re: [RFC PATCH] x86, fpu: Use eagerfpu by default on all CPUs

On Sun, Feb 22, 2015 at 01:57:36PM +0100, Ingo Molnar wrote:
> This is also very similar to the ~0.6 secs improvement your 
> first set of numbers gave.

Yeah, running without --repeat was simply misleading.

> So now that it appears we have consistent numbers, it would 
> be nice to check it on older hardware (and other workloads) 
> as well, to see whether it's a consistent win.

I'll try to dig out some old boxes we have here, maybe the build robot
could do some measurements too.

Fengguang et al, guys, is it possible for you to run this patch:

https://lkml.kernel.org/r/b0ba174ea882ed36cf7011e872baf427c23b7e09.1424458621.git.luto@amacapital.net

on your fleet - has to be baremetal - to check how it behaves,
performance-wise? Older machines would be preferred...

That would be lovely :-)

Thanks!

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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