From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264236AbTDWSlo (ORCPT ); Wed, 23 Apr 2003 14:41:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264243AbTDWSlo (ORCPT ); Wed, 23 Apr 2003 14:41:44 -0400 Received: from e35.co.us.ibm.com ([32.97.110.133]:18649 "EHLO e35.co.us.ibm.com") by vger.kernel.org with ESMTP id S264236AbTDWSlk (ORCPT ); Wed, 23 Apr 2003 14:41:40 -0400 Date: Wed, 23 Apr 2003 11:43:19 -0700 From: "Martin J. Bligh" To: Andrew Theurer , Ingo Molnar , linux-kernel@vger.kernel.org Subject: Re: [patch] HT scheduler, sched-2.5.68-B2 Message-ID: <1538380000.1051123399@flay> In-Reply-To: <200304231253.09520.habanero@us.ibm.com> References: <1535810000.1051120075@flay> <200304231253.09520.habanero@us.ibm.com> X-Mailer: Mulberry/2.1.2 (Linux/x86) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org >> > - turn off the more agressive idle-steal variant. This could fix the >> > low-load regression reported by Martin J. Bligh. >> >> Yup, that fixed it (I tested just your first version with just that >> bit altered). > > Can we make this an arch specific option? I have a feeling the HT performance > on low loads will actually drop with this disabled. Is it really an arch thing? Or is it a load level thing? I get the feeling it might be switchable dynamically, dependant on load ... M.