On Thu, Oct 07, 2004 at 02:02:38PM +0100, Alan Cox wrote: > > Note that there's some code in there already which uses the blitter to copy > > from framebuffer to agp memory, though it tries to implement the entire > > readpixels() operation rather than being a useful low-level operation. > > AGP memory is hostside uncached (CPU limitations on x86 for one) which > means it is better (swap PCI for DDR ram bus latencies is good) but > still benefits from the treatment.
Why can't we make AGP memory cached? Wouldn't it be enought to flush the caches at some critical points? I was playing around with DirectFB and AGP some years ago and enabling write-back caching didn't seem to have any side effects. Without caching AGP is almost as bad as video memory for sw fallbacks. -- Ville Syrjälä [EMAIL PROTECTED] http://www.sci.fi/~syrjala/ ------------------------------------------------------- This SF.net email is sponsored by: IT Product Guide on ITManagersJournal Use IT products in your business? Tell us what you think of them. Give us Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more http://productguide.itmanagersjournal.com/guidepromo.tmpl -- _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
