From owner-freebsd-stable@FreeBSD.ORG Tue Oct 30 02:06:11 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id D3C9755A for ; Tue, 30 Oct 2012 02:06:11 +0000 (UTC) (envelope-from break19@gmail.com) Received: from mail-gg0-f182.google.com (mail-gg0-f182.google.com [209.85.161.182]) by mx1.freebsd.org (Postfix) with ESMTP id 87B778FC08 for ; Tue, 30 Oct 2012 02:06:11 +0000 (UTC) Received: by mail-gg0-f182.google.com with SMTP id l1so1103592ggn.13 for ; Mon, 29 Oct 2012 19:06:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type:content-transfer-encoding; bh=gyMdV+8Ch4JWrfJ9dmuAwTB7OrS7GlPHmG+Cu2UnQCU=; b=NXwOUBQLIshQS11xxiRB6zYZLr/qRnu9pd0SB4RXST9+miSunlNLngP39jvCh37yyJ eDwlcl21Jw1G7rl1QCQi8ZtBgIt9o9lwBf+36ZnQM8tUxkl1KU2gm0KT/LiGrwL+aXEG BGbk5760AtZ5+bYsOIghGdxN05pwOC9OfBO9xWgubpYbbav8Kx/aF15qhi6b3fn8dwe5 pYdjzscHsn1ldcR2ruNjsHHydxnazPYJUiASbMwaLfklbiZlBfJPQaq1xPSSgLRZzC5k HVOAJ0z4EvVYPz4Vi72d+EywJTQUe45Hth/CHjW1ogjJwKiCWmIDzP9LvavAEymdZR0V /8uw== Received: by 10.236.76.132 with SMTP id b4mr31112101yhe.106.1351562765191; Mon, 29 Oct 2012 19:06:05 -0700 (PDT) Received: from [192.168.1.187] (173-17-34-224.client.mchsi.com. [173.17.34.224]) by mx.google.com with ESMTPS id u12sm10274536ank.18.2012.10.29.19.06.04 (version=SSLv3 cipher=OTHER); Mon, 29 Oct 2012 19:06:04 -0700 (PDT) Message-ID: <508F3608.3000301@gmail.com> Date: Mon, 29 Oct 2012 21:06:00 -0500 From: Chuck Burns User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121011 Thunderbird/16.0.1 MIME-Version: 1.0 To: freebsd-stable@freebsd.org Subject: Re: CPU Competition Issue References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 30 Oct 2012 02:06:11 -0000 On 10/29/2012 08:33 PM, Steven Nikkel wrote: > I'm running a long duration CPU-centric process that will gobble up all > available CPU time. I have it set to run at nice +20. While it's running > I've noticed other processes have a hard time getting CPU time and run > their activites very slowly. The processes I've noticed issues with are > IO involved, but they don't appear to be IO blocked as they run > dramatically faster and use much more CPU time when the CPU intensive > process is not running. I haven't noticed issues with other processes, > but I haven't been looking. If I push my CPU intensive process into idle > priority 1, all the other processes return to their normal behaviour as > if it's not running. > > This seems to be a specific behaviour on this one machine running > 9.0-RELEASE-p4 on an Atom 330 dual core. I've tried with and without > hyperthreading enabled with no noticeable change in behaviour. > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" I will likely irritate some people, but you could try the 4BSD scheduler, see if that gives you better results.