Date: Wed, 04 Mar 1998 19:57:39 -0800 From: Mike Smith <mike@smith.net.au> To: Stephen McKay <syssgm@dtir.qld.gov.au> Cc: Simon Shapiro <shimon@simon-shapiro.org>, current@FreeBSD.ORG Subject: Re: silo overflows (Was Re: 3.0-RELEASE?) Message-ID: <199803050357.TAA24001@dingo.cdrom.com> In-Reply-To: Your message of "Thu, 05 Mar 1998 13:41:44 %2B1000." <199803050341.NAA08541@troll.dtir.qld.gov.au>
next in thread | previous in thread | raw e-mail | index | archive | help
> Do you have a Matrox Millennium? I borrowed a Matrox Millennium II for > a while and put it in my Pentium 133 box. Suddenly I got silo overflows > when there was simultaneous incoming serial data and X activity (like > scrolling a 60 line xterm window). When I returned the Millennium and > put my Trio64V+ card back in, all serial problems disappeared. At the time, > I was running the serial port at only 38400, but now run it at 115200 with > no problems. > > I didn't do enough investigation to even guess at the cause. I looked in > the XFree86 server code for interrupt disabling but found nothing interesting. Does the server disable interrupts for extended periods of time? > I was wondering though if any PCI experts knew if a PCI video card could > starve the PCI-ISA bridge of cycles. Any experts out there? It's quite possible; it would depend on the PCI latency timer settings, but generally the latency provided for there is only of the order of a few microseconds. I would be more interested in knowing whether the X server did interrupt-related things specific to the Matrox driver... -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199803050357.TAA24001>