Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755613AbZJ1Uq3 (ORCPT ); Wed, 28 Oct 2009 16:46:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755597AbZJ1Uq0 (ORCPT ); Wed, 28 Oct 2009 16:46:26 -0400 Received: from rhlx01.hs-esslingen.de ([129.143.116.10]:51492 "EHLO rhlx01.hs-esslingen.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755569AbZJ1UqZ (ORCPT ); Wed, 28 Oct 2009 16:46:25 -0400 Date: Wed, 28 Oct 2009 21:46:28 +0100 From: Andreas Mohr To: Igor Chudov Cc: linux-kernel@vger.kernel.org Subject: Re: Hyperthreading on 4 core CPU DECREASES performance??? Message-ID: <20091028204628.GA8519@rhlx01.hs-esslingen.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Priority: none User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 513 Lines: 14 Hi, > I would like to know how can I make the scheduler to prefer to spread > the tasks across physical cores as opposed to bundling two on one core > and leaving some cores idle. Did you have /sys/devices/system/cpu/sched_smt_power_savings activated? Andreas Mohr -- 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/