From owner-freebsd-stable@FreeBSD.ORG Thu Nov 18 18:46:50 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 8308010656A8 for ; Thu, 18 Nov 2010 18:46:50 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from qmta02.emeryville.ca.mail.comcast.net (qmta02.emeryville.ca.mail.comcast.net [76.96.30.24]) by mx1.freebsd.org (Postfix) with ESMTP id 6803A8FC1A for ; Thu, 18 Nov 2010 18:46:49 +0000 (UTC) Received: from omta16.emeryville.ca.mail.comcast.net ([76.96.30.72]) by qmta02.emeryville.ca.mail.comcast.net with comcast id YdB21f0051ZMdJ4A2impQ6; Thu, 18 Nov 2010 18:46:49 +0000 Received: from koitsu.dyndns.org ([98.248.41.155]) by omta16.emeryville.ca.mail.comcast.net with comcast id Yimo1f00M3LrwQ28cimoZn; Thu, 18 Nov 2010 18:46:49 +0000 Received: by icarus.home.lan (Postfix, from userid 1000) id 5098F9B427; Thu, 18 Nov 2010 10:46:48 -0800 (PST) Date: Thu, 18 Nov 2010 10:46:48 -0800 From: Jeremy Chadwick To: Alexander Best Message-ID: <20101118184648.GA46187@icarus.home.lan> References: <4CE50849.106@zedat.fu-berlin.de> <4CE52177.3020306@freebsd.org> <20101118182324.GA36312@freebsd.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101118182324.GA36312@freebsd.org> User-Agent: Mutt/1.5.21 (2010-09-15) Cc: "O. Hartmann" , freebsd-performance@freebsd.org, FreeBSD Current , FreeBSD Stable , Andriy Gapon Subject: Re: TTY task group scheduling X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Nov 2010 18:46:50 -0000 On Thu, Nov 18, 2010 at 06:23:24PM +0000, Alexander Best wrote: > On Thu Nov 18 10, Andriy Gapon wrote: > > on 18/11/2010 13:04 O. Hartmann said the following: > > > On 11/18/10 02:30, grarpamp wrote: > > >> Just documenting regarding interactive performance things. > > >> This one's from Linux. > > >> > > >> http://www.phoronix.com/scan.php?page=article&item=linux_2637_video&num=1 > > > > > > Well, > > > it would be nice to have those improvements in FreeBSD, but I doubt this will make > > > it in due time to FreeBSD's kernel. > > > > Well, I think that those improvements apply only to a very specific usage pattern > > and are greatly over-hyped. > > you think so? judging from the videos the changes are having a huge impact imo. > > cheers. > alex > > btw: i posted a similar thread on freebsd-backers@, but nobody seemed > interested in it. subject line is "sched_autogroup_enabled". FWIW, this /. post pretty much sums up my opinion of this scheduler change (though I admit something could be learned from it): http://linux.slashdot.org/comments.pl?sid=1870628&cid=34241622 Specifically, the quote: "process grouping is too difficult to be done based on such simplistic criteria". -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |