From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 8 May 2001 03:18:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 8 May 2001 03:18:37 -0400 Received: from smtp1.cern.ch ([137.138.128.38]:5132 "EHLO smtp1.cern.ch") by vger.kernel.org with ESMTP id ; Tue, 8 May 2001 03:18:20 -0400 Date: Tue, 8 May 2001 09:18:11 +0200 From: Jamie Lokier To: "Richard B. Johnson" Cc: Alan Cox , alexander.eichhorn@rz.tu-ilmenau.de, linux-kernel@vger.kernel.org Subject: Re: [Question] Explanation of zero-copy networking Message-ID: <20010508091811.C17720@pcep-jamie.cern.ch> In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: ; from root@chaos.analogic.com on Mon, May 07, 2001 at 12:12:57PM -0400 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Richard B. Johnson wrote: > However, PCI to memory copying runs at about 300 megabytes per > second on modern PCs and memory to memory copying runs at over 1,000 > megabytes per second. In the future, these speeds will increase. That would be "big expensive modern PCs" then. Our clusters of 700MHz boxes are strictly limited to 132 megabytes per second over PCI... -- Jamie