From owner-freebsd-net Fri Oct 19 17:50: 5 2001 Delivered-To: freebsd-net@freebsd.org Received: from smtp1.sentex.ca (smtp1.sentex.ca [199.212.134.4]) by hub.freebsd.org (Postfix) with ESMTP id 4290C37B401 for ; Fri, 19 Oct 2001 17:49:59 -0700 (PDT) Received: from chimp.simianscience.com (cage.simianscience.com [64.7.134.1]) by smtp1.sentex.ca (8.11.6/8.11.6) with SMTP id f9K0nml20994; Fri, 19 Oct 2001 20:49:48 -0400 (EDT) (envelope-from mike@sentex.net) From: Mike Tancsa To: zec@tel.fer.hr (Marko Zec) Cc: freebsd-net@freebsd.org Subject: Re: fxp driver - receive interrupt bundling Date: Fri, 19 Oct 2001 20:49:48 -0400 Message-ID: References: In-Reply-To: X-Mailer: Forte Agent 1.8/32.548 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Fri, 19 Oct 2001 23:06:16 +0000 (UTC), in sentex.lists.freebsd.hackers you wrote: >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 Hi, What values would you reccomend for a box with 4 fxp NICs in them ? Does it follow the the INT_DELAY should be lowered as you add more NICs ? ---Mike Mike Tancsa (mdtancsa@sentex.net) =09 Sentex Communications Corp, =09 Waterloo, Ontario, Canada "Given enough time, 100 monkeys on 100 routers=20 could setup a national IP network." (KDW2) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message