On Fri, 13 Jun 2003, Roland Scheidegger wrote:
>
> (This could be related to the same bug as the one seen in nwn, as
> decreasing the cmd_buf size fixes the problem for me just as well,
> though I still have no idea why).
I wonder if this is related to the flickering problem I saw on i845, and
that Keith figured out as texture uploads being racy with the _use_ of
those textures.
Decreasing the command buffer size might cause two things:
- slow down and synchronize command execution enough to hide the race
- leave slightly more card memory free, possibly resulting in more
texture space, possibly hiding the problem due to less memory
management pressure.
I've seen both of these at work on the i845: disabling MTRR's apparently
slowed down the AGP accesses enough that the race was hidden, and the
graphics engine probably always outran the CPU. And increasing the AGP
memory size meant that there wasn't any mm pressure on the textures any
more.
Linus
-------------------------------------------------------
This SF.NET email is sponsored by: eBay
Great deals on office technology -- on eBay now! Click here:
http://adfarm.mediaplex.com/ad/ck/711-11697-6916-5
_______________________________________________
Dri-devel mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/dri-devel
