From owner-freebsd-current@FreeBSD.ORG  Mon Oct 12 04:33:59 2009
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 4ED49106566B
	for <freebsd-current@freebsd.org>; Mon, 12 Oct 2009 04:33:59 +0000 (UTC)
	(envelope-from sgk@troutmask.apl.washington.edu)
Received: from troutmask.apl.washington.edu (troutmask.apl.washington.edu
	[128.208.78.105])
	by mx1.freebsd.org (Postfix) with ESMTP id 3268E8FC0A
	for <freebsd-current@freebsd.org>; Mon, 12 Oct 2009 04:33:59 +0000 (UTC)
Received: from troutmask.apl.washington.edu (localhost.apl.washington.edu
	[127.0.0.1])
	by troutmask.apl.washington.edu (8.14.3/8.14.3) with ESMTP id
	n9C4XwMf039404; Sun, 11 Oct 2009 21:33:58 -0700 (PDT)
	(envelope-from sgk@troutmask.apl.washington.edu)
Received: (from sgk@localhost)
	by troutmask.apl.washington.edu (8.14.3/8.14.3/Submit) id
	n9C4XwE8039403; Sun, 11 Oct 2009 21:33:58 -0700 (PDT)
	(envelope-from sgk)
Date: Sun, 11 Oct 2009 21:33:58 -0700
From: Steve Kargl <sgk@troutmask.apl.washington.edu>
To: Alex R <alex@mailinglist.ahhyes.net>
Message-ID: <20091012043358.GA39364@troutmask.apl.washington.edu>
References: <6729ad0409e449f8dbda69ecd8feb618.squirrel@webmail.lerctr.org>
	<20091012014846.GB38325@troutmask.apl.washington.edu>
	<fe073255a48a675c0a8ab5bb8c105e61.squirrel@webmail.lerctr.org>
	<20091012023912.GA38822@troutmask.apl.washington.edu>
	<4AD29937.2040004@mailinglist.ahhyes.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <4AD29937.2040004@mailinglist.ahhyes.net>
User-Agent: Mutt/1.4.2.3i
Cc: freebsd-current@freebsd.org
Subject: Re: Scheduler weirdness
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 12 Oct 2009 04:33:59 -0000

On Mon, Oct 12, 2009 at 01:49:27PM +1100, Alex R wrote:
> Steve Kargl wrote:
> >So, you have 4 cpus and 4 folding-at-home processes and you're
> >trying to use the system with other apps?  Switch to 4BSD.
> >
> >  
> 
> I thought SCHED_ULE was meant to be a much better choice under an SMP 
> environment. Why are you suggesting he rebuild his kernel and use the 
> legacy scheduler?
> 

If you have N cpus and N+1 numerical intensitive applications,
ULE may have poor performance compared to 4BSD.   In OP's case,
he has 4 cpus and 4 numerical intensity (?) applications.  He,
however, also is trying to use the system in some interactive
way.

-- 
Steve