From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 27 Jan 2001 07:51:08 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 27 Jan 2001 07:50:48 -0500 Received: from shell.cyberus.ca ([209.195.95.7]:36277 "EHLO shell.cyberus.ca") by vger.kernel.org with ESMTP id ; Sat, 27 Jan 2001 07:50:42 -0500 Date: Sat, 27 Jan 2001 07:49:35 -0500 (EST) From: jamal To: Ion Badulescu cc: Andrew Morton , lkml , "netdev@oss.sgi.com" Subject: Re: sendfile+zerocopy: fairly sexy (nothing to do with ECN) In-Reply-To: <200101271005.f0RA5DX04357@moisil.dev.hydraweb.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 27 Jan 2001, Ion Badulescu wrote: > > 750MHz PIII, Adaptec Starfire NIC, driver modified to use hardware sg+csum > (both Tx/Rx), and Intel i82559 (eepro100), no hardware csum support, > vanilla driver. > > The box has 512MB of RAM, and I'm using a 100MB file, so it's entirely cached. > > starfire: > 2.4.1-pre10+zerocopy, using sendfile(): 9.6% CPU > 2.4.1-pre10+zerocopy, using read()/write(): 18.3%-29.6% CPU * why so much variance? > What are your throughput numbers? Could you also, please, test using: http://www.cyberus.ca/~hadi/ttcp-sf.tar.gz post both sender and receiver data. Repeat each test about 5 times. cheers, jamal - 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/