Parallella for real time weather predictions

Parallella for real time weather predictions

Postby nis » Sat Apr 12, 2014 10:58 am

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
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Re: Parallella for real time weather predictions

Postby eleitl » Mon May 26, 2014 12:28 pm

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.
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Re: Parallella for real time weather predictions

Postby Gravis » Tue May 27, 2014 3:25 pm

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).
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Re: Parallella for real time weather predictions

Postby sneuf0897 » Tue Dec 23, 2014 7:56 pm

Post by Gravis » Tue May 27, 2014 10:25 am
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.


Would that necessarily be Epiphany-IV chips on the custom board?

/sneuf
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Re: Parallella for real time weather predictions

Postby adam.g » Sat Apr 11, 2015 6:26 am

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?
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Re: Parallella for real time weather predictions

Postby adam.g » Thu Apr 16, 2015 10:56 am

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?
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Re: Parallella for real time weather predictions

Postby sebraa » Thu Apr 16, 2015 6:22 pm

Perl does run on the Parallella, and it can utilize both ARM cores.
It does not run on the Epiphany chip, though.
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Re: Parallella for real time weather predictions

Postby adam.g » Thu Apr 16, 2015 6:34 pm

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?
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Re: Parallella for real time weather predictions

Postby sebraa » Fri Apr 17, 2015 10:56 am

No.
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Re: Parallella for real time weather predictions

Postby lenoxx » Sat Jan 28, 2017 10:21 pm

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?"
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