[Mesa-dev] [PATCH v3 0/4] Disable glthread if libX11 isn't thread-safe

[Eric Anholt]

gregory hainaut <gregory.hainaut at gmail.com> writes:

> On Fri, 5 May 2017 17:45:01 +0200
> Axel Davy <axel.davy at normalesup.org> wrote:
>
>> Hi,
>> 
>> There should be very few X11 calls while rendering (basically only at 
>> the beginning or end of a frame).
>> 
>> Why not just always run these calls in the main thread (and wait for 
>> glthread work to finish) ?
>> 
>> That's basically what we do for gallium nine.
>> 
>> Yours,
>> 
>> Axel
>
> Hello Axel,
>
> Yes it is another possibility. It would requires to track gl calls that end up in X11.
> I'm not sure if there is an easy way to list all those gl functions. There are at least the 
> draw calls and maybe the clear operations. Besides I'm afraid that we will need to handle
> various corner cases of the OpenGL API. It is doable but likely more complicated.

General GL calls (draws, clears) won't call X11 except for DRI2's
GetBuffers.  If you're in DRI3, I believe you won't need to worry about
that at all.

I think this patch is a good start, though.
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