https://bugzilla.kernel.org/show_bug.cgi?id=198511 --- Comment #28 from Barto (mister.freeman@xxxxxxxxxxx) --- I made another test, by using a player like VLC and a video file ( 1080p, 60 FPS ) : - with a video file 1080p@60 fps, GPU acceleration disabled ( XV output ) and kernel 4.15rc8 : I can notice a slight degradation, but less visible than firefox, it needs a trained eye in order to notice the performance issue, - with a video file 1080p@60 fps, GPU acceleration enabled ( VDPAU ) and kernel 4.15rc8 : all is ok, perfect 60 FPS frame, 100% smooth playback - with a video file 1080p@60 fps, GPU acceleration disabled ( XV output ) and kernel 4.14.14: all is ok the key here is the video resolution and framerate, things get difficult for my CPU when we reach the resolution 1080p AND the framerate 60 fps, any weak/non optimized algorithm in kernel ( or video driver ) will likely trigger slight lags/frame drops, if I use the "cheat mode" ( GPU acceleration with VDPAU ) then all is ok, no lags when the video has a resolution 1080p/60 fps and when I use kernel 4.15rc8. It would be interesting to create a benchmark ( a simple source code in C ) in order to evaluate with precision ( with a number ) the performance level of your algorithm related to drm/ttm, it will make easy the comparison between kernel 4.14.14 ( old algorithm ) and kernel 4.15rc8 -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
