Date: Fri, 01 Sep 1995 01:32:42 -0700 From: David Greenman <davidg@Root.COM> To: Bruce Evans <bde@zeta.org.au> Cc: hackers@freebsd.org Subject: Re: novell ne2000 cards with FreeBSD...opinions? Message-ID: <199509010832.BAA22510@corbin.Root.COM> In-Reply-To: Your message of "Fri, 01 Sep 95 17:29:56 %2B1000." <199509010729.RAA32626@godzilla.zeta.org.au>
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>>Yeah, I just looked at the driver and saw the programmed IO cruft in there >>to deal with the novell cards. Bummer. Someone mentioned that some of the >>cards really do have shared memory and can run just like the SMC and 3COM. >>Do you know anything about this? > >Shared memory on my NE2000/WD8013EBT card is 50% faster, but that isn't >saying much. The driver spends half its time bcopying to the shared >memory instead of more that half its time doing explicit i/o instructions. >The speeds are something like: > > i/o instructions: 2MB/sec > bcopy: 3MB/sec > IDE disk controllers: 3.3MB/sec PIO mode 0 (or 1?) spec > 8MHz ISA bus max: 4MB/sec Your bus is slow. The 8013 usually has memory speeds of 4MB/sec. -DG
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