video performance loss with kernel 4.15.x (drm/ttm problem) скачать в хорошем качестве

video performance loss with kernel 4.15.x (drm/ttm problem)

since kernel linux 4.15.x a new algorithm for drm/ttm has been introduced, called "drm/ttm: add transparent huge page support for DMA allocations v2 ", the effect of this new algorithm can led to a slight video performance degradation on youtube videos 1080p, mostly noticeable when the frame rate is 60 fps, but can be also see on some cases with 30 fps , especially during the vertical scrool of the credits, to demonstrate this problem I filmed my screen with my smartphone, at first I filmed with kernel 4.14.14, then with kernel 4.15.2, we can see on the second attempt that the scrool of the credits are not as good as with kernel 4.14.14 configuration : configuration used : radeon hd4650 pci-e CPU intel core 2 quad Q9650 archlinux 64 bits kernel 4.14.14 and 4.15.2-2 firefox youtube video for the test :    • Superscope PSD300 - A Pro CD Recorder with...