[MITgcm-support] Process tracking

[Bertrand Louis Rene Delorme]

Dear Ryan and Martin,
Thank you for your help. Both solution works perfectly well.
Cheers,
Bertrand


> On Nov 21, 2016, at 5:47 AM, Martin Losch <martin.losch at awi.de> wrote:
> 
> Ryan’s solution is probably the safest one, but you can also use “global indices”. 
> 
> Here’s an excerpt of pkg/cost/cost_test.F that shows you how to define the global indices:
>          do j=1,sNy
>          jg = myYGlobalLo-1+(bj-1)*sNy+j
>            do i=1,sNx
>            ig = myXGlobalLo-1+(bi-1)*sNx+i
> you can then use ig,jg to find out where you are on your global domain (1:nx,1:ny), see pkg/cost/cost_test.F for more details.
> 
> Martin
> 
>> On 19 Nov 2016, at 23:39, Ryan Abernathey <ryan.abernathey at gmail.com> wrote:
>> 
>> Define your forcing in terms of physical space coordinates (e.g. XC, YC) rather than grid indices and you will be fine. 
>> 
>> -Ryan
>> 
>> Sent from my iPhone
>> 
>>> On Nov 19, 2016, at 5:24 PM, Bertrand Louis Rene Delorme <bdelorme at stanford.edu> wrote:
>>> 
>>> Hi,
>>> 
>>> I added a body force to gV in external_forcing.f, which I apply only in a very specific region of my domain, and I ran my simulation by using only one process. Now, I would like to use several processes (by increasing nPx and nPy) but I do not find a way to know where I am in the domain to apply the body force at the same precise location as before. Is there a way of finding out from inside of external_forcing.f what the location of the particular tile is? If not, would you have any ideas on how to run my experiment in parallel?
>>> 
>>> Thanks,
>>> 
>>> Bertrand Delorme
>>> 
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