[GRASS-dev] Parallel computing for r.sun

[Seth Price]

Also, OpenCL can run as both multicore CPU and GPU. OpenMP can only run on CPU but it's much easier to program. I vaguely recall the OpenCL speed up over single thread on the order of 20x - 50x. If you're looking for a consultant to do additional OpenCL work, I might be able to help.
~Seth

via iPhone

On Jan 29, 2013, at 8:01 AM, Yann Chemin <yann.chemin at gmail.com> wrote:

> Hi,
> 
> OpenMP first to leverage the actual CPU development routes.
> OpenCL second to leverage the actual GPU routes.
> 
> Cheers,
> Yann
> 
> 
> 
> On 29 January 2013 19:11, Newcomb, Doug <doug_newcomb at fws.gov> wrote:
>> I would vote for multicore OpenMP/OPENCL.  I just purchased an 8 core AMD Vishera MB and CPU combo for under $300US to use at home , which is faster than the 8 core Xeon server system I used to do statewide solar irradiation modeling at work  for a 755 Million cell grid for 365 days (half hour increments)  in 2011. With the advances in multicore architecture ( who knows what core densities ARM will bring?) and utilization of the processing elements in video cards, I think you will benefit many more users on going the multicore route.
>> 
>> Doug
>> 
>> 
>> On Tue, Jan 29, 2013 at 8:05 AM, Ruzicka Jan <jan.ruzicka at vsb.cz> wrote:
>>> Dear developers,
>>> 
>>> We are planning to rewrite the module r.sun for parallel computation and would like to ask you, which platform is more desired by the GRASS community. To our understanding there are two main ways of development. Either we design it for multi-core desktop systems that use shared memory (for example with use of OpenMP) or create module for large clusters with use of MPI library.
>>> 
>>> Which way do you think would benefit GRASS more?
>>> 
>>> Best regards
>>> 
>>> Jan Ruzicka
>>> _______________________________________________
>>> grass-dev mailing list
>>> grass-dev at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/grass-dev
>> 
>> 
>> 
>> -- 
>> Doug Newcomb
>> USFWS
>> Raleigh, NC
>> 919-856-4520 ext. 14 doug_newcomb at fws.gov
>> ---------------------------------------------------------------------------------------------------------
>> The opinions I express are my own and are not representative of the official policy of the U.S.Fish and Wildlife Service or Dept. of the Interior.   Life is too short for undocumented, proprietary data formats.
>> 
>> _______________________________________________
>> grass-dev mailing list
>> grass-dev at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/grass-dev
> 
> 
> 
> -- 
> Yann Chemin
> Researcher at IWMI
> Skype/FB: yann.chemin
> 
> _______________________________________________
> grass-dev mailing list
> grass-dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-dev
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/grass-dev/attachments/20130129/b94608f1/attachment.html>