[Bug 95192] [EXA] X server intermittently hangs for short moments with rv710 card

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue May 3 20:11:41 UTC 2016


--- Comment #7 from aceman <acelists at atlas.sk> ---
(In reply to Michel Dänzer from comment #6)
> > But on such a low card, wouldn't EXA be always faster than anything openGL?
> No, why? glamor is generally on par with EXA and for some operations such as
> text rendering (which is among the most important in practice) significantly
> faster. If there are any cases where glamor is significantly slower than EXA
> for you, please file bug reports against the Server/Acceleration/glamor
> component.

So far I've seen glxgears fullscreen (full HD) does not manage the normal 60fps
that EXA does. With glamor it is like 30fps. But I need to determine if it
isn't caused by Tearfree.

> If you can ssh in from another machine, that might allow you to get more
> information about the hangs.

I am not able to ssh to the machine and run a tracer in 10 seconds ;)

> > Also of interest could be that the kernel is 64bit, but all the userland
> > (X.org and mesa too) are 32bit.
> Any chance you could try if the problem also occurs with 64-bit Xorg?

That would require upgrading the whole distro. But I have that in planning in
the next 1-2 months.

>> Does the problem also occur without the kernel parameter vmalloc=384000000?
>> And without any non-default options in xorg.conf?

Yes it does. I've removed these non-default options but the hangs are back
(default switched from glamor to exa again).

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