From owner-freebsd-hackers Fri Sep 1 01:32:00 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.FreeBSD.org (8.6.11/8.6.6) id BAA21908 for hackers-outgoing; Fri, 1 Sep 1995 01:32:00 -0700 Received: from Root.COM (implode.Root.COM [198.145.90.17]) by freefall.FreeBSD.org (8.6.11/8.6.6) with ESMTP id BAA21902 for ; Fri, 1 Sep 1995 01:31:53 -0700 Received: from corbin.Root.COM (corbin [198.145.90.34]) by Root.COM (8.6.12/8.6.5) with ESMTP id BAA13383; Fri, 1 Sep 1995 01:30:45 -0700 Received: from localhost (localhost [127.0.0.1]) by corbin.Root.COM (8.6.11/8.6.5) with SMTP id BAA22510; Fri, 1 Sep 1995 01:32:44 -0700 Message-Id: <199509010832.BAA22510@corbin.Root.COM> To: Bruce Evans cc: hackers@freebsd.org Subject: Re: novell ne2000 cards with FreeBSD...opinions? In-reply-to: Your message of "Fri, 01 Sep 95 17:29:56 +1000." <199509010729.RAA32626@godzilla.zeta.org.au> From: David Greenman Reply-To: davidg@Root.COM Date: Fri, 01 Sep 1995 01:32:42 -0700 Sender: hackers-owner@freebsd.org Precedence: bulk >>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