Re: Framebuffer console performance
From: Antonino A. Daplas <hidden>
Date: 2005-04-16 03:22:28
On Friday 25 March 2005 06:14, Gary Thomas wrote:
I have a non-standard framebuffer (i.e. I wrote the driver, based on the au1000 driver) running on 2.4.27. When I run virtual consoles on it, I see sluggish scroll performance. I get quite acceptable performance when the system first comes up, e.g. during the system initialization messages, but not long afterwards the scrolling slows down. It can get continually worse, eventually ending up at a crawl.
When the system starts up, the scroll mode is 'redraw'. This mode is acceptable, not too slow and not too fast either, whatever the hardware is. After starting up, the scroll mode changes depending on the driver. Most probably, it is using ypan which is not too great on systems without accelerated rectangle moves and framebuffer reads are slow. Try setting vyres == yres using fbset and see if that helps. Tony ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click