From owner-freebsd-hackers Mon Mar 19 23:44:48 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from info.iet.unipi.it (info.iet.unipi.it [131.114.9.184]) by hub.freebsd.org (Postfix) with ESMTP id 1D0B637B718 for ; Mon, 19 Mar 2001 23:44:45 -0800 (PST) (envelope-from luigi@info.iet.unipi.it) Received: (from luigi@localhost) by info.iet.unipi.it (8.9.3/8.9.3) id IAA94631; Tue, 20 Mar 2001 08:43:46 +0100 (CET) (envelope-from luigi) From: Luigi Rizzo Message-Id: <200103200743.IAA94631@info.iet.unipi.it> Subject: Re: Routing latency In-Reply-To: <3AB7077A.543522F0@herbelot.com> from Thierry Herbelot at "Mar 20, 2001 08:32:10 am" To: Thierry Herbelot Date: Tue, 20 Mar 2001 08:43:45 +0100 (CET) Cc: "[M_rten Wikstr_m]" , "'freebsd-hackers@freebsd.org'" X-Mailer: ELM [version 2.4ME+ PL61 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > > I'm using the de driver. Alas, the NICs seems quite old. They are 21140's. > > I've only got one 21143. I think there is a 3COM 3c905b in the lab too. > > Would it be better to use the 21143 + 3com than two 21140s? > > definitely : in my packet blaster, I get an order of magnitude less > packet drops with a 3c905 than with a dc NIC (which is on a multi-port > NIC : the PCI-PCI bridge may be a hindrance there) not my experience -- with the 21143 i can blast 140kpacket/s and receive them with no problems. For sure the "de" driver might have its own problems, but i think a lot of packet drops also depend on the card not being properly set for full duplex (which can cause collisions and lots of drops). cheers luigi > TfH > > > > /M_rten > > -- > Thierry Herbelot > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message