Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755858AbZJ1VLs (ORCPT ); Wed, 28 Oct 2009 17:11:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755616AbZJ1VLr (ORCPT ); Wed, 28 Oct 2009 17:11:47 -0400 Received: from mail-ew0-f208.google.com ([209.85.219.208]:40991 "EHLO mail-ew0-f208.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754431AbZJ1VLr (ORCPT ); Wed, 28 Oct 2009 17:11:47 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=nU815IJTlMzTjObunNmgwWFvlTW6cdV73OYNAfmiTHZegbcjvXO6H5ftQNmQtI7NvL BxzXpK7wldE04HIcTugJWFTb47GIKqT6pakMV0BhteHW0SPdzALELQ+1UgnRnPKrkO7j xa/eyddT1nkoGJO4eleck/qaGv0PXDe4qJDNQ= MIME-Version: 1.0 In-Reply-To: <20091028204628.GA8519@rhlx01.hs-esslingen.de> References: <20091028204628.GA8519@rhlx01.hs-esslingen.de> Date: Wed, 28 Oct 2009 16:11:51 -0500 Message-ID: Subject: Re: Hyperthreading on 4 core CPU DECREASES performance??? From: Igor Chudov To: Andreas Mohr Cc: linux-kernel@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 678 Lines: 14 On Wed, Oct 28, 2009 at 3:46 PM, Andreas Mohr wrote: >> 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, no, I did not have it activated, it was set to 0. I did check it before and double checked it now. -- 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/