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Newsgroups: comp.unix.bsd.bsdi.misc Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.uwa.edu.au!classic.iinet.com.au!swing.iinet.net.au!news.uoregon.edu!gatech!news.mathworks.com!news.kei.com!world!mis From: mis@world.std.com (Mark Seiden) Subject: Re: performance problems with intel etherexpress/bsdi 2.0.1/intel p6 Message-ID: <DGCJ66.Ku9@world.std.com> Keywords: poor performance Organization: The World Public Access UNIX, Brookline, MA References: <DG5CL5.FLI@world.std.com> <45a4uc$f83@raid.us.dell.com> Date: Thu, 12 Oct 1995 17:27:42 GMT Lines: 36 james@raid.us.dell.com (James Van Artsdalen) writes: >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. this was in the intel-furnished beta program configuration for win nt. i would think intel themselves would know how to configure their own hardware but what do i know... we used a 3com 3c509 for the event and performance was satisfactory. nothing else changed. unfortunately, we were too overloaded to track down the actual problem. >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