From owner-freebsd-hackers Fri Oct 19 17:16:21 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from root.com (root.com [209.102.106.178]) by hub.freebsd.org (Postfix) with ESMTP id E3EEF37B401; Fri, 19 Oct 2001 17:16:17 -0700 (PDT) Received: (from dg@localhost) by root.com (8.11.2/8.11.2) id f9K0EFq89356; Fri, 19 Oct 2001 17:14:15 -0700 (PDT) (envelope-from dg) Date: Fri, 19 Oct 2001 17:14:15 -0700 From: David Greenman To: Marko Zec Cc: freebsd-hackers@freebsd.org, freebsd-net@freebsd.org Subject: Re: fxp driver - receive interrupt bundling Message-ID: <20011019171415.B48897@nexus.root.com> References: <3BD0B1D4.CFC32A4D@tel.fer.hr> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3BD0B1D4.CFC32A4D@tel.fer.hr>; from zec@tel.fer.hr on Sat, Oct 20, 2001 at 01:05:56AM +0200 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 http://fly.cc.fer.hr/~zec/index.html you can find a 4.4-RELEASE fxp >driver source, with patches that incorporate receive interrupt bundling >microcode, borrowed from the Intel's Linux e100 driver. > >Bundling interrupts for a couple of received Ethernet frames can >significantly lower interrupt processing overhead, so if you have a >really busy server or router or whatever this code can make a noticeable >difference. On an 1200 MHz Athlon machine, the microcode saves around >10% of CPU utilization, with incoming traffic of 20k pps on a single >interface. > >The code is tested on 82558 rev B0 hardware, I'd be glad to know how it >works on other versions of Intel's fxp cards. > >Pls. send your comments, suggestions etc. to zec@tel.fer.hr > >Have fun! Nifty! -DG David Greenman Co-founder, The FreeBSD Project - http://www.freebsd.org President, TeraSolutions, Inc. - http://www.terasolutions.com Pave the road of life with opportunities. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message