Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id <S132290AbQLVWLw>; Fri, 22 Dec 2000 17:11:52 -0500
Received: (majordomo@vger.kernel.org) by vger.kernel.org
	id <S132444AbQLVWLm>; Fri, 22 Dec 2000 17:11:42 -0500
Received: from mailhst2.its.tudelft.nl ([130.161.34.250]:27652 "EHLO
	mailhst2.its.tudelft.nl") by vger.kernel.org with ESMTP
	id <S132290AbQLVWLa>; Fri, 22 Dec 2000 17:11:30 -0500
Date: Fri, 22 Dec 2000 22:39:43 +0100
From: Erik Mouw <J.A.K.Mouw@ITS.TUDelft.NL>
To: "Jeff V. Merkey" <jmerkey@vger.timpanogas.org>
Cc: Linux kernel mailing list <linux-kernel@vger.kernel.org>
Subject: Re: bigphysarea support in 2.2.19 and 2.4.0 kernels
Message-ID: <20001222223943.E25239@arthur.ubicom.tudelft.nl>
In-Reply-To: <E149DKS-0003cX-00@the-village.bc.nu> <20001221154446.A10579@vger.timpanogas.org> <20001221155339.A10676@vger.timpanogas.org> <20001222093928.A30636@polyware.nl> <20001222111105.B14232@vger.timpanogas.org> <20001222113530.A14479@vger.timpanogas.org> <20001222202137.A27844@gruyere.muc.suse.de> <20001222132541.A1555@vger.timpanogas.org> <20001222205103.A9441@polyware.nl> <20001222145450.B2025@vger.timpanogas.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.2.5i
In-Reply-To: <20001222145450.B2025@vger.timpanogas.org>; from jmerkey@vger.timpanogas.org on Fri, Dec 22, 2000 at 02:54:50PM -0700
Organization: Eric Conspiracy Secret Labs
X-Eric-Conspiracy: There is no conspiracy!
Sender: linux-kernel-owner@vger.kernel.org
X-Mailing-List: linux-kernel@vger.kernel.org

On Fri, Dec 22, 2000 at 02:54:50PM -0700, Jeff V. Merkey wrote:
> Having a 1 Gigabyte per second fat pipe that runs over a prallel bus 
> fabric with a standard PCI card that costs @ $ 500 and can run LVS 
> and TUX at high speeds would be for the common good, particularly since
> NT and W2K both have implementations of Dolphin SCI that allow them 
> to exploit this hardware.  

I'm just wondering how you are going to do 1 Gbyte per second when you
still have to get the data through a PCI bus to that card. In theory,
standard PCI can do 133 Mbyte/s, but only when you're very lucky to be
able to burst large chunks of data. OK, 64 bit PCI at 66 MHz should
quadruple the throughput, but that's still not enough for 1 Gbyte/s.


Erik

-- 
J.A.K. (Erik) Mouw, Information and Communication Theory Group, Department
of Electrical Engineering, Faculty of Information Technology and Systems,
Delft University of Technology, PO BOX 5031,  2600 GA Delft, The Netherlands
Phone: +31-15-2783635  Fax: +31-15-2781843  Email: J.A.K.Mouw@its.tudelft.nl
WWW: http://www-ict.its.tudelft.nl/~erik/
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/