From owner-freebsd-bugs Sun May 3 12:31:49 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id MAA11325 for freebsd-bugs-outgoing; Sun, 3 May 1998 12:31:49 -0700 (PDT) (envelope-from owner-freebsd-bugs@FreeBSD.ORG) Received: from critter.freebsd.dk (critter.freebsd.dk [195.8.129.14]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id MAA11283 for ; Sun, 3 May 1998 12:31:29 -0700 (PDT) (envelope-from phk@critter.freebsd.dk) Received: from critter.freebsd.dk (localhost [127.0.0.1]) by critter.freebsd.dk (8.8.7/8.8.5) with ESMTP id VAA12129; Sun, 3 May 1998 21:30:36 +0200 (CEST) To: Nate Williams cc: John Hay , freebsd-bugs@FreeBSD.ORG Subject: Re: i386/5398 In-reply-to: Your message of "Sun, 03 May 1998 12:58:27 MDT." <199805031858.MAA20839@mt.sri.com> Date: Sun, 03 May 1998 21:30:35 +0200 Message-ID: <12127.894223835@critter.freebsd.dk> From: Poul-Henning Kamp Sender: owner-freebsd-bugs@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org 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