From: Kurt Garloff <garloff@suse.de>
To: Nick Piggin <npiggin@suse.de>
Cc: Linux kernel list <linux-kernel@vger.kernel.org>,
Ian Pratt <Ian.Pratt@cl.cam.ac.uk>, Andi Kleen <ak@suse.de>
Subject: Re: 2.6.11 vs 2.6.10 slowdown on i686
Date: Fri, 18 Mar 2005 09:25:54 +0100 [thread overview]
Message-ID: <20050318082554.GA12536@tpkurt.garloff.de> (raw)
In-Reply-To: <42397A04.2060703@yahoo.com.au>
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Hi Nick,
On Thu, Mar 17, 2005 at 11:37:24PM +1100, Nick Piggin wrote:
> Ian Pratt wrote:
> >fork: 166 -> 235 (40% slowdown)
> >exec: 857 -> 1003 (17% slowdown)
> >
> >I'm guessing this is down to the 4 level pagetables. This is rather a
> >surprise as I thought the compiler would optimise most of these
> >changes away. Apparently not.
>
> There are some changes in the current -bk tree (which are a
> bit in-flux at the moment) which introduce some optimisations.
>
> They should bring 2-level performance close to par with 2.6.10.
> If not, complain again :)
Is there a clean patchset that we should look at to test?
Regards,
--
Kurt Garloff, Director SUSE Labs, Novell Inc.
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next prev parent reply other threads:[~2005-03-18 8:27 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-17 12:16 Ian Pratt
2005-03-17 12:37 ` Nick Piggin
2005-03-17 20:23 ` Ian Pratt
2005-03-18 8:25 ` Kurt Garloff [this message]
2005-03-18 8:46 ` Nick Piggin
2005-03-17 18:36 ` Andi Kleen
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