[Bug 198511] lags in youtube videos 1080p 60fps with radeon hd4650 and kernel 4.15rc8

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=198511

--- Comment #30 from Barto (mister.freeman at laposte.net) ---
(In reply to Christian König from comment #26)
> As a band aid I will try to fix our algorithm when pages are freed again,
> but in general the driver stack or application should be fixed to not do
> that.
> 
> Probably best if you open up a bug report on http://bugs.freedesktop.org/ so
> that somebody can investigate what userspace is doing here.

Did you progress about this ttm algorithm ?

I filmed my screen with a smartphone in order to capture the problem :

https://www.youtube.com/watch?v=YqtleU5YBlA

at first I filmed with kernel 4.14.14, then with kernel 4.15.2, we can see on
the second attempt that the vertical 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

the youtube video for the test :
https://youtu.be/AXL4r30VgSE?t=19m2s

in fact the performance loss can occur at 720p at 30fps on some situation, for
example the vertical scroll of the credits, there are noticeable lags for the
scrolling of the credits, though the rest of the video seems smooth,

it would be interesting to have a kernel boot parameter in order to restore the
previous ttm algorithm

-- 
You are receiving this mail because:
You are watching the assignee of the bug.