Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261503AbVCRI1A (ORCPT ); Fri, 18 Mar 2005 03:27:00 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261508AbVCRI1A (ORCPT ); Fri, 18 Mar 2005 03:27:00 -0500 Received: from ns.suse.de ([195.135.220.2]:47794 "EHLO Cantor.suse.de") by vger.kernel.org with ESMTP id S261503AbVCRI0E (ORCPT ); Fri, 18 Mar 2005 03:26:04 -0500 Date: Fri, 18 Mar 2005 09:25:54 +0100 From: Kurt Garloff To: Nick Piggin Cc: Linux kernel list , Ian Pratt , Andi Kleen Subject: Re: 2.6.11 vs 2.6.10 slowdown on i686 Message-ID: <20050318082554.GA12536@tpkurt.garloff.de> Mail-Followup-To: Kurt Garloff , Nick Piggin , Linux kernel list , Ian Pratt , Andi Kleen References: <42397A04.2060703@yahoo.com.au> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="W/nzBZO5zC0uMSeA" Content-Disposition: inline In-Reply-To: <42397A04.2060703@yahoo.com.au> X-Operating-System: Linux 2.6.11.1-4-default i686 X-PGP-Info: on http://www.garloff.de/kurt/mykeys.pgp X-PGP-Key: 1024D/1C98774E, 1024R/CEFC9215 Organization: SUSE/Novell User-Agent: Mutt/1.5.6i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1374 Lines: 47 --W/nzBZO5zC0uMSeA Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable 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.=20 >=20 > There are some changes in the current -bk tree (which are a > bit in-flux at the moment) which introduce some optimisations. >=20 > 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, --=20 Kurt Garloff, Director SUSE Labs, Novell Inc. --W/nzBZO5zC0uMSeA Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) iD8DBQFCOpCSxmLh6hyYd04RAhDQAJ9+SxyXgatmZUr5aYSF668qHqweYACgkWDD EYB8uUyQuHUV50nP3DpfMHA= =Y4bt -----END PGP SIGNATURE----- --W/nzBZO5zC0uMSeA-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/