From owner-freebsd-hackers Thu Feb 7 15:27:44 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from seven.Alameda.net (seven.Alameda.net [64.81.63.137]) by hub.freebsd.org (Postfix) with ESMTP id A642537B41D for ; Thu, 7 Feb 2002 15:27:37 -0800 (PST) Received: by seven.Alameda.net (Postfix, from userid 1000) id B066E3A242; Thu, 7 Feb 2002 15:27:36 -0800 (PST) Date: Thu, 7 Feb 2002 15:27:36 -0800 From: Ulf Zimmermann To: Josef Karthauser Cc: "Duane H. Hesser" , hackers@FreeBSD.ORG, Ulf Zimmermann Subject: Re: USB UHCI speed issue ? Message-ID: <20020207152736.T45642@seven.alameda.net> Reply-To: ulf@Alameda.net References: <20020116110612.B16252@genius.tao.org.uk> <200201200139.g0K1dv621605@androcles.com> <20020120112349.B7430@genius.tao.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20020120112349.B7430@genius.tao.org.uk>; from joe@tao.org.uk on Sun, Jan 20, 2002 at 11:23:49AM +0000 Organization: Alameda Networks, Inc. X-Operating-System: FreeBSD 4.4-STABLE Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Sun, Jan 20, 2002 at 11:23:49AM +0000, Josef Karthauser wrote: > On Sat, Jan 19, 2002 at 05:39:56PM -0800, Duane H. Hesser wrote: > > > > I can confirm the problem, and point you to a message in the "current" > > archives (Dec 15) which contains a simple 3 or 4 line patch to uhui.c. > > The message, authored by Andrew Gordon, may be found at > > > > http://www.FreeBSD.org/cgi/getmsg.cgi?fetch=775757+780830+/usr/local/www/db/text/2001/freebsd-current/20011216.freebsd-curren > > t > > Hmm. :) Looking at the NetBSD code, they made a major commit to fix the > same issue: > > uhci.c revision 1.123 > date: 2000/08/13 16:18:09; author: augustss; state: Exp; lines: +136 -31 > Implement what in Intel-speech is known as "bandwidth reclamation". > It means that we continously poll USB devices that have a pending transfer > instead of polling just once every ms. This speeds up some transfers > at the expense of using more PCI bandwidth. > > I'm looking at what is necessary to port that change over. > > Joe I was wondering if this has been ported over and if so, how about a -stable version. -- Regards, Ulf. --------------------------------------------------------------------- Ulf Zimmermann, 1525 Pacific Ave., Alameda, CA-94501, #: 510-865-0204 You can find my resume at: http://seven.Alameda.net/~ulf/resume.html To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message