Parallella for real time weather predictions

[nis]

Hi,

Weather Research and Forecast system (WRF) is a computationally intensive and widely used weather predication model. It is prepackaged with parallel processing tools (for eg:http://strc.comet.ucar.edu/software/newrems/), such as MPICH. Can I ascertain Epipheny cores and parllella cluster can work with WRF. WRF is also patched to run with NVIDIA GPUS by CUDA (http://www.mmm.ucar.edu/wrf/WG2/GPU/).

Thanks in advance,
Regards,
Nishadh

[eleitl]

Your main limitation will be the 32 kByte code limit on the Parallella cores. If your problem fits it, and you can port the application to this architecture, you're good.

[Gravis]

i get the feeling that the software is dependant on doubles (64 bits) instead of floats (32 bits). If that is true, then you are pretty much sunk unless you dont mind losing some precision in the name of speed. Also, if you want real time, you will likely need multiple interconnected Parallellas/Epiphany chips. With a custom board, the Epiphany chips can scale up to about 4k interconnected cores.

It's my opinion that the Epiphany is best suited for processing data streams since that removes overhead (if you have another core handling data IO).

[sneuf0897]

[adam.g]

Hi, has anyone tried running the WRF EMS package on Parallella? http://strc.comet.ucar.edu/software/newrems/
Is it possible to run on Parallella?

[adam.g]

Hi again, I did some quick research and found that the EMS software comes as Perl script. Do you know anything about running Perl on Parallella? How does it work? Does it use the multiple cores?

[sebraa]

Perl does run on the Parallella, and it can utilize both ARM cores.
It does not run on the Epiphany chip, though.

[adam.g]

thanks for this information, its very useful for me. Is there any way to make it work on Epiphany chip to utilize the full computing power?

[sebraa]

No.

[lenoxx]

The WRF model is mostly Fortran 90 and C with openMPI directives. WRF-EMS is a seperate project aimed largely at weather forecasters for automating the WRF model. WRF-EMS is written in Perl and runs precompiled versions of the WRF model.

http://www2.mmm.ucar.edu/wrf/WG2/WRF_conventions.html

To reiterate the original post, "Can I ascertain Epipheny cores and parllella cluster can work with WRF?"