Date: Tue, 27 Jan 1998 17:14:10 -0800 From: Anne Hutton <hutton@ISI.EDU> To: Chris Csanady <ccsanady@friley585.res.iastate.edu> Cc: Amancio Hasty <hasty@rah.star-gate.com>, freebsd-hackers@FreeBSD.ORG Subject: Re: Gigabit ethernet cards for FreeBSD? Message-ID: <199801280114.RAA10116@tnt.isi.edu> In-Reply-To: Your message of Tue, 27 Jan 1998 15:21:10 -0600. <199801272121.PAA06499@friley585.res.iastate.edu>
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> > >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
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