Date: Thu, 19 Aug 1999 11:11:07 -0600 (MDT) From: "Kenneth D. Merry" <ken@kdm.org> To: wes@softweyr.com (Wes Peters) Cc: wpaul@skynet.ctr.columbia.edu, crandall@matchlogic.com, dmiller@search.sparks.net, freebsd-hackers@FreeBSD.ORG Subject: Re: Gigabit ethernet support? Message-ID: <199908191711.LAA31017@panzer.kdm.org> In-Reply-To: <37BBA73D.37765DD5@softweyr.com> from Wes Peters at "Aug 19, 1999 00:42:05 am"
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Wes Peters wrote... > "Kenneth D. Merry" wrote: > > Wes Peters wrote... > > > We have two of the NetGear GA620's here, and they work quite nicely. I use > > > them for testing throughput via Gig-E on our switches. Mine is running in > > > a lowly PII/233, on a 32-bit x 33 Mhz slot, and can push bits at 320 Mbps. > > > The GA620 will work in any 32 or 64 bit, 33 or 66 Mhz slot. A 64x66 slot > > > would probably speed things up appreciably. > > > > I doubt a faster PCI interface would really speed things up. My guess is > > that you've got some other bottleneck other than PCI bandwidth. Is the CPU > > pegged on either end? > > Not on mine, it's running about 45%. The other end is much faster, a PII/400, > and is just discarding the packets, so it's not sweating. The window size tweaks may help you somewhat. > > I would recommend that you make sure you've got a couple of things tweaked, > > they may increase your performance somewhat: > > > > - set your MTU to 9000, unless of course you're going through a switch that > > can't handle it > > Not yet, that's part of what I will be developing. ;^) Due to architectural > limitations, we may not be able to support jumbo frames larger than 8k. That's unfortunate, since you won't be compliant with the pseudo-standard. With 1500 byte packets, you probably won't be able to get much better throughput than what you're getting now. I can get about 340Mbps with standard sized packets with a couple Pentium II 350's, and the CPU isn't pegged on either end. Ken -- Kenneth Merry ken@kdm.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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