Date: Sat, 2 May 1998 12:30:00 -0700 (PDT) From: Matthew Dillon <dillon@backplane.com> To: freebsd-bugs@FreeBSD.ORG Subject: Re: i386/5398 Message-ID: <199805021930.MAA19115@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
The following reply was made to PR i386/5398; it has been noted by GNATS.
From: Matthew Dillon <dillon@backplane.com>
To: Poul-Henning Kamp <phk@critter.freebsd.dk>
Cc: John-Mark Gurney <gurney_j@efn.org>, freebsd-gnats-submit@FreeBSD.ORG
Subject: Re: i386/5398
Date: Sat, 2 May 1998 09:40:35 -0700 (PDT)
:> cpu out of suds? This is a pentium pro 200. More likely, there is a
:> serious interrupt disablement latency somewhere in the kernel.
:
:What graphics card is this ? Is the blt done in HW when you move the
:window or by the CPU over the PCI bus ?
At the time the bug report was submitted, it was a matrox mystique
running with the latest XFree86 (so probably some hardware blit).
But it doesn't matter if the blit is done in software or not, frankly,
because interrupts had better be enabled at the time the X server does
a software blit (since it's a user mode process), and a hardware
blit in the matrox shouldn't stall a pci write to the board
for more then a few microseconds anyway before the pentium can unstall
and take the serial interrupt.
-Matt
:--
: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
:
Matthew Dillon Engineering, BEST Internet Communications, Inc.
<dillon@backplane.com>
[always include a portion of the original email in any response!]
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199805021930.MAA19115>