Date: Sun, 03 May 1998 21:30:35 +0200 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: Nate Williams <nate@mt.sri.com> Cc: John Hay <jhay@mikom.csir.co.za>, freebsd-bugs@FreeBSD.ORG Subject: Re: i386/5398 Message-ID: <12127.894223835@critter.freebsd.dk> In-Reply-To: Your message of "Sun, 03 May 1998 12:58:27 MDT." <199805031858.MAA20839@mt.sri.com>
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In message <199805031858.MAA20839@mt.sri.com>, Nate Williams writes: >> >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. Mind you, I didn't say it worked great with ISA either :-) -- Poul-Henning Kamp FreeBSD coreteam member phk@FreeBSD.ORG "Real hackers run -current on their laptop." "ttyv0" -- What UNIX calls a $20K state-of-the-art, 3D, hi-res color terminal To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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