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From: Paolo Bonzini <pbonzini@redhat.com>
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Date: Thu, 21 Jan 2016 11:16:43 +0100
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Subject: Re: [Qemu-devel] RFC: running the user interface in a thread ...
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To: Gerd Hoffmann <kraxel@redhat.com>
Cc: David Airlie <airlied@redhat.com>, Dave Airlie <airlied@gmail.com>, qemu-devel <qemu-devel@nongnu.org>, =?UTF-8?Q?Marc-Andr=c3=a9_Lureau?= <mlureau@redhat.com>



On 21/01/2016 10:52, Gerd Hoffmann wrote:
>> > Instead of having a full-blown thread, are there things (such as the
>> > TGSI->GLSL conversion) that could be simply offloaded to a userspace
>> > thread pool, either in QEMU or in virglrenderer?
> I think virglrenderer would have to do that.  Unfortunaly opengl isn't
> very good at multithreading, so I'm not sure a thread pool would work
> well.  Compiling shaders could be a special case where threading
> actually works because that isn't in the actual rendering workflow.  Not
> fully sure though, Dave?

Or even MESA could. Perhaps we (you :)) could add an extension for
asynchronous shader compilation.  But the TGSI->GLSL conversion is done
by virglrender, with no opengl calls (with a big IIRC in front).

Paolo