16.07.2014 00:35, Clemens Eisserer wrote: > I don't know anybody who still uses a VGA 640x480 display with 16-bit > color depth - my display is 1920x1280x4 * 30fps = ~280mb/s at 30 fps. The comparison involved Skype, so it makes sense to include the specs of Skype video. And it's typically 640x480. As for 2 bytes per pixel, it's because of YUV420. > Furthermore, X has to move the data over busses to vram and in the > worst case do a blit using the CPU. > > From my personal experience, compute-bound workload often tends to be > easier to handle than bandwidth-bound stuff where suddenly bottlenecks > are waiting all along the data paths (I do performance-tuning for VLIW > DSP chips as a living). > > Anyway, in my profile I don't see any resampling. Either I am really > hitting that bug, or it is another inefficiency happening somewhere. Well, I think that the easiest way to figure that out is to test PulseAudio from git. It's non-destructive, you don't have to install it, it runs fine from the build directory as long as --prefix, --sysconfdir and --localstatedir are the same as in the distribution-provided version. -- Alexander E. Patrakov
