Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 29 Jul 2002 19:41:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 29 Jul 2002 19:41:35 -0400 Received: from [195.223.140.120] ([195.223.140.120]:18464 "EHLO penguin.e-mind.com") by vger.kernel.org with ESMTP id ; Mon, 29 Jul 2002 19:41:34 -0400 Date: Tue, 30 Jul 2002 01:45:58 +0200 From: Andrea Arcangeli To: Alan Cox Cc: Andrew Theurer , linux-kernel@vger.kernel.org, Marcelo Tosatti Subject: Re: Linux 2.4.19-rc3 (hyperthreading) Message-ID: <20020729234558.GM1201@dualathlon.random> References: <200207291454.30076.habanero@us.ibm.com> <1027978122.4050.22.camel@irongate.swansea.linux.org.uk> <20020729203840.GA1201@dualathlon.random> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20020729203840.GA1201@dualathlon.random> User-Agent: Mutt/1.3.27i X-GnuPG-Key-URL: http://e-mind.com/~andrea/aa.gnupg.asc X-PGP-Key-URL: http://e-mind.com/~andrea/aa.asc Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1174 Lines: 24 On Mon, Jul 29, 2002 at 10:38:40PM +0200, Andrea Arcangeli wrote: > On Mon, Jul 29, 2002 at 10:28:42PM +0100, Alan Cox wrote: > > On Mon, 2002-07-29 at 20:54, Andrew Theurer wrote: > > > I would caution against having hyperthreading on by default in the 2.4.19 > > > release. I am seeing a significant degrade in network workloads on P4 with > > > hyperthreading on. On 2.4.19-pre10, I get 788 Mbps on NetBench, but on > > > 2.4.19-rc1 (and probably rc3, should know in an hour), I get 690 Mbps. It is > > > clearly a hyperthreading/interrupt routing issue. On this system (4 x P4), > > > > Quite possibly. I've just merged the O(1) scheduler load balancing fixes > > for the hyperthreading stuff, rc3 uses the old scheduler so that isnt > > btw, please make sure to merge my patch, the original one had several > severe bugs. and the new one had a bug too :). Please merge the fix I posted to l-k too thanks. Andrea - 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/