From owner-freebsd-hackers Sat Jun 24 17:29:39 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id RAA01974 for hackers-outgoing; Sat, 24 Jun 1995 17:29:39 -0700 Received: from gndrsh.aac.dev.com (gndrsh.aac.dev.com [198.145.92.241]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id RAA01967 for ; Sat, 24 Jun 1995 17:29:36 -0700 Received: (from rgrimes@localhost) by gndrsh.aac.dev.com (8.6.11/8.6.9) id RAA14210; Sat, 24 Jun 1995 17:29:02 -0700 From: "Rodney W. Grimes" Message-Id: <199506250029.RAA14210@gndrsh.aac.dev.com> Subject: Re: FreeBSD as a router To: bde@zeta.org.au (Bruce Evans) Date: Sat, 24 Jun 1995 17:29:02 -0700 (PDT) Cc: davidg@Root.COM, nc@ai.net, hackers@freebsd.org In-Reply-To: <199506242128.HAA01653@godzilla.zeta.org.au> from "Bruce Evans" at Jun 25, 95 07:28:21 am X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Length: 854 Sender: hackers-owner@freebsd.org Precedence: bulk > > >Second question, and related. Even if an software based router has to > >wait for an entire packet frame to come in before routing it, that > >strikes me only as a latency problem, and not a thruput problem, > >especially on cards that can multitask and have builtin buffers [32k in > >the SMC 100mbps I believe] Couldn't the driver be written to grab the > > This seems rather small. 4K buffers cause problems at 10Mbps so I > suppose 40K would cause problems at 100Mbps. The SMC 9332 EtherPower 10/100 is a bus master device with no memory on it at all. It uses host memory for packet buffers and for all practical purposes this can be as much memory as you want to through at it! -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Reliable computers for FreeBSD