[Beowulf] programming guidence request

Douglas Eadline deadline at eadline.org
Fri Jan 23 09:08:29 EST 2009


You may find these two articles by Jeff Squyres useful:

  MPI: Debugging in Parallel (in Parallel)
   http://www.clustermonkey.net//content/view/60/28/
  MPI: Debugging -- Can You Hear Me Now?
   http://www.clustermonkey.net//content/view/59/28/

--
Doug


> Hello All,
> I am developing my parallel CFD code on a small cluster. My system has
> openmpi installed based on gfortran compiler. Please guide me
> follwing:
>
> (1) Which debugger would be easy and effective to use for above?
>
> (2) Which of the folliwng two ways of using arrays is more efficient
> with respect to memory and function-call-overheads or other overheads:
>                  (i) We should keep the arrays ALLOCATABLE and then
> before return from the subroutines, DEALLOCATE the local arrays.
>               or (ii) We should keep the local arrays fix-sized as
> much as we can. (Will the memory is deallaocated/freed automatically
> on return from the subroutine?).
>
> Thanks.
> with best regards,
> Amjad Ali.
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-- 
Doug

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