[Distrs] Salutations
Nikos Alexandris
nik at nikosalexandris.net
Tue Nov 26 16:47:06 PST 2013
Yann Chemin wrote:
> Hi Nikos,
>
> There are two sets of distributed suites, one using OpenMP (complete) and a
> small one using OpenCL (incomplete but few simple modules are there).
Thank you Yann. I will try to have a look at his next week. Earlier it is
impossible.
> In any case I suggest you take any of the directory inside prog/ or progcl/
> that you are most familiar with (i.e. prog_NDVI is always an easy take) and
> compile it in your computer (make clean; make). After that, use any input
> required (for NDVI, Red and NIR) and run the module. The distribution of
> processing is done within the dataset processed, i.e. all pixels are loaded
> in RAM, then each receives pixels as available and process the image
> required.
Sounds easy :-p
> for OpenMP (prog/ directory) distribution, I suggest you use a biggish
> image (1Gb per input band) to see a significant change with 4/8
> core/threads. It scales well, you can try bigger and more cores/threads.
Will do so.
> Cheers,
> Yann
>
> PS: if your CPU is INTEL, go in the BIOS and enable HyperThreading, it will
> double you number of cores, works very well for such type of processing
> distribution.
Working with a Xeon E5-2630 here. Funtoo sees 12 cores, so I guess it's
allready at max.
Nikos
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