[Dri-devel] Conclusions from the Parallelizing MESA's pipeline thread

[Felix Kühling]

Hello,

First of all, thanks for all the comments I received in this thread.
During the last few days I was also inspired to start more systematic
reading of the MESA and Radeon driver source codes. In these 5 days I
learned more than in 5 months before!

As to the subject, there are three main conclusions I draw from this
thread:
- rendering parallelization has been done before with different approaches 
- implementing the parallel pipeline I had in mind would be a lot of work
- with TCL hardware there would be little or no benefit

Furthermore, the majority of DRI users have no SMP system and only SMP
systems would benefit from a multi-threaded pipeline. And people who do
use high-end hardware most likely have TCL hardware as well (or can
afford it ;-)

With all that in mind I think my enthusiasm would be better spent
otherwise, especially considering that I have TCL hardware and no SMP
system ;-) There are other projects within DRI which are interesting,
too. I'm thinking of indirect accellerated rendering which was discussed
previously a couple of times. For now there are a few bugs left in the
Radeon driver to fix ...

Best regards,
   Felix

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Re: [Dri-devel] Conclusions from the Parallelizing MESA's pipeline thread

[Jos Fonseca]

Felix,

On Mon, Dec 02, 2002 at 06:45:15PM +0100, Felix Kühling wrote:
 Hello,
 
 First of all, thanks for all the comments I received in this thread.
 During the last few days I was also inspired to start more systematic
 reading of the MESA and Radeon driver source codes. In these 5 days I
 learned more than in 5 months before!

I'm really surprised with your fast advances!

 As to the subject, there are three main conclusions I draw from this
 thread:
 - rendering parallelization has been done before with different approaches 
 - implementing the parallel pipeline I had in mind would be a lot of work
 - with TCL hardware there would be little or no benefit

Nevertheless it was good food for thought.

 There are other projects within DRI which are interesting, too. I'm
 thinking of indirect accellerated rendering which was discussed
 previously a couple of times. 

Yes, this is surely interesting, especially because IMHO it could open a
door to a new driver paradigm, where the OpenGL state would be in X
server space, rather than in the client, and therefore eliminating
several security concerns. But this is another story...

 For now there are a few bugs left in the Radeon driver to fix ...

Unfortunately I've been too busy lately for DRI development (not to
mention the chronic amneasia regarding the IRC meetings...) I've been
under pressure to have results for my PhD and this will likely endure until a
conference next February. (I guess I'm paying for fooling around in the
last year.) I've been using my little free time to take care of some
unfinished businesses (my webpage, and some old projects). But I confess
that I'm eager to start coding on DRI again.. (If I just had another
pair of eyes and hands on my back! ;-)

José Fonseca
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