[GRASS-dev] Parallel computing for r.sun

Yann Chemin yann.chemin at gmail.com
Tue Jan 29 17:55:40 PST 2013


grass-devs,

anyone has a timeline for merging the OpenCL code into trunk?

Cheers,
Yann


On 29 January 2013 21:00, Seth Price <seth at pricepages.org> wrote:

> 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
>
>


-- 
Yann Chemin
Researcher at IWMI
Skype/FB: yann.chemin
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/grass-dev/attachments/20130130/54de4bbb/attachment.html>


More information about the grass-dev mailing list