heya,

to tell you the truth i don't remember the state of the exporter. we
did have this option precisely for what you describe. one pixel
pipeline one GPU, and several for the export. i think it did lead to a
certain amount of race conditions for sequence numbers etc, and for
CPU based export, it didn't actually speed things up (in fact it
slowed it down).

so the option was removed but it's possible that the backend still
supports it to some extent. even for multi-GPU setups our experience
back then was that export speed was much more io bound (read big RAW,
write full res high quality JPG..) than compute bound, so the idea
didn't receive much attention. today we arguably have quite a few very
expensive operations so we might want to re-evaluate this.

cheers,
 jo

On Mon, Sep 3, 2018 at 8:09 PM Lutz Labusch <lutz.labu...@gmail.com> wrote:
>
> Hi all,
>
> i want to say thank you for darktable, which is a pretty nice program, first.
>
> As a owner of two (n)  powerful GPU devices it will be very interesting to 
> have the possibility to have two (n) exporting threads for larger jobs. Is 
> there somewhere an hidden option for this?
>
> Thanks and best regards
>
> ___________________________________________________________________________ 
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