Date: Sun, 3 May 1998 12:58:27 -0600 From: Nate Williams <nate@mt.sri.com> To: Poul-Henning Kamp <phk@critter.freebsd.dk> Cc: John Hay <jhay@mikom.csir.co.za>, freebsd-bugs@FreeBSD.ORG Subject: Re: i386/5398 Message-ID: <199805031858.MAA20839@mt.sri.com> In-Reply-To: <11869.894218238@critter.freebsd.dk> References: <199805031749.TAA07478@zibbi.mikom.csir.co.za> <11869.894218238@critter.freebsd.dk>
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> >Just to get my understanding of the hardware a little better. Is this > >blitting just doing something like a software memory copy, like what > >the C function bcopy() does? And can that really block interrupts just > >because it is done over the PCI bus? Or does blitting use something > >different? > > I don't know how it is done exactly, check with XFree86. I just know > that any PCI bus hogging will send your interrupt latency soaring :-( ps. It's not just PCI bus hogging, since I've got an ISA box that also sees the same thing. As a matter of fact, I'm pretty sure it's completely unrelated to any particular bus architecture. Nate To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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