[gdal-dev] [NEW] Multi-threaded warping

[Etienne Tourigny]

Even - good stuff!

Can you comment on the usage of openmp for multi-threading?  Is the
multi-threading in gdal entirely based on pthreads (in linux)?

It's my understanding that openmp is much easier to manage but offers
less fine-grained control - is that required for multi-thread warping?
Of course what works best is what is already working!

Sorry for such a generic question, I did not really look into the
specifics (other than a quick look at mutext handling).

Regards,
Etienne

On Sun, Jun 10, 2012 at 6:52 PM, Even Rouault
<even.rouault at mines-paris.org> wrote:
> Le dimanche 10 juin 2012 23:44:54, Yogesh Dahiya a écrit :
>> As far I know gdal1.9 has integrated opencl so we can parallelize by
>> setting it right.
>> So what exactly is your addition.
>> By the way I tried opencl case and was able to get 16x over general case
>> for lanczos for image of 16000*16000
>
> (Replying to list too, as others might have the same question)
>
> Yes indeed, GDAL 1.9 can use OpenCL and this implementation is of course still
> available.
>
> Unfortunately, AFAIK, there is not yet any working OpenSource OpenCL
> implementation (and my experience with some proprietary OpenCL implementation
> has not always been convincing, like the GUI being totally unresponsive during
> the processing).
>
> The new multi-threaded implementation just uses traditional multi-threading
> technics that are available on all platforms where GDAL can run.
> _______________________________________________
> gdal-dev mailing list
> gdal-dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/gdal-dev