Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262322AbVAELJ7 (ORCPT ); Wed, 5 Jan 2005 06:09:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262324AbVAELJ7 (ORCPT ); Wed, 5 Jan 2005 06:09:59 -0500 Received: from smtp.uninet.ee ([194.204.0.4]:28174 "EHLO smtp.uninet.ee") by vger.kernel.org with ESMTP id S262322AbVAELJ5 (ORCPT ); Wed, 5 Jan 2005 06:09:57 -0500 Message-ID: <41DBCAE5.9010408@tuleriit.ee> Date: Wed, 05 Jan 2005 13:09:25 +0200 From: Indrek Kruusa Reply-To: indrek.kruusa@tuleriit.ee User-Agent: Mozilla Thunderbird 0.8 (X11/20040923) X-Accept-Language: en-us, en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: Re: Very high load on P4 machines with 2.4.28 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 740 Lines: 20 > On Maw, 2005-01-04 at 22:41, Nicholas Berry wrote: > >/ Indeed. AIX (sorry) 5.3 on POWER5 explicitly disables SMT (IBM/ >>/ hyperthreading) if the load doesn't warrant it./ >>/ / > >/ (Now how about that for Linux?) :)/ > It would be very nice to do but AFAIK no current processor with > hypedthreading lets you do dynamic disabling. Maybe I am victim of marketing (or poor memory) but wasn't it so that x86 instruction HLT was possible to use for single logical processor? Indrek - 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/