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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!news.mel.connect.com.au!munnari.OZ.AU!news.ecn.uoknor.edu!feed1.news.erols.com!arclight.uoregon.edu!hammer.uoregon.edu!newsgate.cuhk.edu.hk!hpg30a.csc.cuhk.hk!news.cuhk.edu.hk!news.sprintlink.net!news-stk-11.sprintlink.net!news2.noc.netcom.net!noc.netcom.net!usenet From: Henry Wong <henry@cplabs.com> Newsgroups: comp.unix.bsd.freebsd.misc,comp.unix.bsd.misc Subject: Re: 100Base-TX: where's the bottleneck? Date: Mon, 04 Nov 1996 10:37:24 -0800 Organization: DASCOM HOLDING Ltd. Lines: 25 Message-ID: <327E37E4.5AD4@cplabs.com> References: <327D4EE8.2D@cplabs.com> <55jkrt$7jc@cynic.portal.ca> NNTP-Posting-Host: cplabs.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-NETCOM-Date: Mon Nov 04 10:30:09 AM PST 1996 X-Mailer: Mozilla 3.01b1 (X11; I; HP-UX A.09.05 9000/712) Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:30602 comp.unix.bsd.misc:1427 Curt Sampson wrote: > > The problem is most likely in the drivers. As I recall, the FreeBSD > driver doesn't do DMA on those cards. > > A couple of people are talking about doing a DMA driver for NetBSD; > if you or anyone you know is interested in working on a version > that would work under NetBSD and FreeBSD, drop me a note. > > BTW, you can use a program called `netperf' to test your performance > instead of going to the trouble of writing your own code. > Yes, the driver just uses PIO mode, not Bus Master mode. But I think even if it works on PIO mode, it shouldn't get so low performance. I changed hub to 10M hub, I got the performance about 7Mbs. Maybe that is a litter faster than normal 10M ethernet adpter's performance. Also I used netperf to test. I got the same result either on 100M ethernet or 10M ethernet. Thanks henry