On Sat, 25 Oct 2008 20:19:36 +0200 Alexander Roalter <alex at roalter.it> wrote: > I mean on the PCI bus I should be able to move 130MB/s, and a 1280x720 > video @24fps produces less than it. Theoretical maximums usually aren't possible to actually acheive with any bus, and x86 makes things worse with interrupts causing serious performance loss. You very well *might* be getting close enough to the max to affect performance. There's an easy way to find out... Reduce your X11 color depth to 16bpp and see if you get significantly improved performance. If your card or system wasn't doing bus master DMA properly, I would actually expect much WORSE performance. Though, perhaps with SMP/multicore CPUs, the lack of DMA might not be as devastating as it used to be. -- Don't trust me! I'm wrong!
