lkml.org 
[lkml]   [2018]   [Nov]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Performance regression in ast drm driver
On Fri, 9 Nov 2018 10:04:03 +1000, David Airlie wrote:
> This seems likely to be a hw problem with PCI writes to the AST "GPU",
> since it's just some sort of RAM + ARM on the end of a PCIE bus, we've
> definitely seen possible issues in the past with write combining
> around some of the mga GPUs with some CPUs.
>
> Have we seen the problem across a number of AST devices?

The reports I received from customers were all on AST 2500 devices (on
Supermicro X11DPi-N, Supermicro X11DPH-T and Asus WS C621 Sage).

I was able to reproduce "the problem" on my old Asus Z6NA-D6 which has
either an AST 2050 device if I trust the board specifications on
asus.com, or an AST 1100 if I trust /var/log/Xorg.0.log.

Note however that I am still not certain that the problem I am seeing
is the same as what both customers reported. It is possible that we
have 2 different issues.

--
Jean Delvare
SUSE L3 Support

\
 
 \ /
  Last update: 2018-11-10 09:40    [W:0.141 / U:1.328 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site