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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!simtel!news.kei.com!newshost.marcam.com!usc!elroy.jpl.nasa.gov!swrinde!news.dell.com!news.dell.com!not-for-mail From: james@raid.us.dell.com (James Van Artsdalen) Newsgroups: comp.unix.bsd.bsdi.misc Subject: Re: performance problems with intel etherexpress/bsdi 2.0.1/intel p6 Date: 8 Oct 1995 22:29:16 -0500 Organization: Dell Computer Corporation Lines: 25 Message-ID: <45a4uc$f83@raid.us.dell.com> References: <DG5CL5.FLI@world.std.com> Reply-To: james@raid.us.dell.com (James Van Artsdalen) NNTP-Posting-Host: raid.us.dell.com Keywords: poor performance In <DG5CL5.FLI@world.std.com>, mis@world.std.com (Mark Seiden) wrote: > for a special event (see http://www.1010.org) we are trying > to get 2.0.1 running on a p6 with an intel ex board. > > at the moment ftp performance is around 1kB/sec. yucko. > the behavior is bursty. transfers a few kB then times out. You need to give more detail on the peripheral cards. One wonders if there is a bus master / DMA device in the system and if the (brand new, beta) chipset/CPU is handling these sorts of cycles correctly. I would personally break out the logic analyzer at this point and look at the PCI or ISA bus for constipation of some sort. If none of the peripherals are bus master or DMA, then another possibility is that some delay loops are running too fast in the kernel device driver. Perhaps a non-Intel NIC would work better: The SMC NIC's work fine in my 133 MHz P-5. The 3com NIC's seem to get kernel error messages about the "FIFO" occasionally, but I'm told this does no harm(???). -- James R. Van Artsdalen james@dell.com "Live Free or Die" Dell Computer Co 9505 Arboretum Blvd Austin TX 78759-7299 512-728-8789