From owner-freebsd-hackers Tue Jan 27 17:14:22 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id RAA00922 for hackers-outgoing; Tue, 27 Jan 1998 17:14:22 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from tnt.isi.edu (tnt.isi.edu [128.9.128.128]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id RAA00904 for ; Tue, 27 Jan 1998 17:14:14 -0800 (PST) (envelope-from hutton@ISI.EDU) Received: from ISI.EDU (moo.isi.edu [128.9.160.187]) by tnt.isi.edu (8.8.7/8.8.6) with ESMTP id RAA10116; Tue, 27 Jan 1998 17:14:10 -0800 (PST) Message-Id: <199801280114.RAA10116@tnt.isi.edu> X-Mailer: exmh version 1.6.4 10/10/95 To: Chris Csanady cc: Amancio Hasty , freebsd-hackers@FreeBSD.ORG Reply-To: hutton@ISI.EDU Subject: Re: Gigabit ethernet cards for FreeBSD? In-reply-to: Your message of Tue, 27 Jan 1998 15:21:10 -0600. <199801272121.PAA06499@friley585.res.iastate.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Tue, 27 Jan 1998 17:14:10 -0800 From: Anne Hutton Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk > > >Just wondering if there are any for FreeBSD , how they perform and how > >much they cost? > > Packet Engines makes one, as well as a full duplex repeater. The NIC's > are somewhere in the $1000-1500 range I believe. As for performance, it's > not quite gigabit yet. With 2 PPro200's, the TCP performance for larger > write sizes is still limited to around 20MB/s. we also found that TCP performance for the Myrinet (also a gigabit technology) on PPro200's running FreeBSD was not good - around 160Mbps. UDP performance was better at around 300Mbps. However, to achieve higher throughput for host based IP forwarding we developed a driver capable of "peer DMA". This increased our throughput to 440Mbps. No changes were made to the OS or protocol stack to achieve this. Ted Faber provided the references in an earlier email. BTW what is the MTU on Gigabit ethernet - 1500? Anne Hutton USC/ISI 4676 Admiralty Way, Marina Del Rey, CA 90292 Tel: 310-822-1511 ext. 211