Date: Mon, 11 May 1998 07:03:16 -0700 From: David Greenman <dg@root.com> To: Stephen Roome <steve@visint.co.uk> Cc: Terry Lambert <tlambert@primenet.com>, freebsd-current@FreeBSD.ORG Subject: Re: Intel Etherexpress PRO/100+ PCI Message-ID: <199805111403.HAA07426@implode.root.com> In-Reply-To: Your message of "Mon, 11 May 1998 10:08:55 BST." <Pine.BSF.3.96.980511100212.2949E-100000@dylan.visint.co.uk>
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>> The second machine has a noise generator on the bus. You need to locate >> it. It may be a sound card without a driver byt with an open source. > >Ah, that would be this : >lpt0 at 0x378-0x37f irq 7 on isa >lpt0: Interrupt-driven port Actually, that's probably not it. Due to the design of the interrupt system on PC machines, stray irq 7's can occur when any irq is asserted and then removed before it is properly ACKed. This is probably not the source of your problem, however. I've heard of similar problems with SMP and the Intel Pro/100B on some machines, but I don't know what is causing it. It probably has something to do with the APIC programming or code. >> I also notice that the interrupt is a shared PCI interrupt in both cases. >> >> You should try to do something about this for performance reasons as well, >> but this *may* be where the problem is lurking. At the very least, it's >> a suspicious "coincidence". > >How do I do something about this? (I Hope that's not too stupid a >question!) You move the card Intel card to a different PCI slot until you find one that gives a good sharing combination. -DG David Greenman Co-founder/Principal Architect, The FreeBSD Project To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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