[AG-TECH] Re: Display Machine Performance

John Shalf jshalf at lbl.gov
Fri Mar 15 12:52:40 CST 2002

I had some issues with APware freaking out because I was
using a serial cable that didn't have CTS and RTS set up the
way that Gentner required.  So their serial driver spent all
of its time agressively polling the serial port for
messages.  Soldering up a proper cable and enabling hardware
flow control made the problem go away.


"Osland, CD (Chris)" wrote:
> From: Robert Olson [mailto:olson at mcs.anl.gov]
> >At 10:39 AM 3/15/2002 -0600, Art Ziarko wrote:
> >>I have spoken the Gentner tech support about apware in the past. They said
> >>the software will use less processor power if other applications need it.
> >So
> >>in effect it  auto adjusts the processing power that it takes up
> >
> >However, if the video is not reacting well with the gentner software
> >running, it is apparently not doing it right. (I had the same interaction
> >with their tech support awhile ago ..)
> >
> >Chris - you're running on a uniprocessor system, right? If so, the APserve
> >is competing directly with the vic for the processor; on a dual-cpu system
> >it probably handles the load better..
> Yup - single processor.  Up till now no problem.
> Thanks to Art and Bob for relaying Gentner's replies.  To my
> simple way of thinking a process that is driving a single serial
> port at 9600 baud shouldn't be written in a way that hits another
> process that is handling 10s of Mbits/sec of video data quite
> happily, single processor or dual processor.  I'll get back to them
> myself and see whether there's a workaround.
> Cheers
> Chris
> ____________________________________________________________________
> Chris Osland                         Office tel: +44 (0) 1235 446565
> Digital Media and Access Grid      Medialab tel: +44 (0) 1235 446459
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