On 10/11/2015 8:25 PM, Matthew Knepley wrote:
On Tue, Nov 10, 2015 at 1:33 AM, TAY wee-beng <[email protected]
<mailto:[email protected]>> wrote:
Hi,
I need a subroutine in Fortran to partition a subset of my grid in
the 3 x,y,z directions for MPI. I thought of using DMDACreate3d
and DMDAGetCorners to get the starting and width of the
partitioned grid.
Because I need to partition at every time step and the subset grid
changes dimension and index at every time step, so I will also
need to use DMDestroy after each time step
Will that use alot of memory? Will the grid actually be created?
So I wonder if this DMDACreate3d and DMDestroy calls will take a
lot of time.
DMDA just does 1D partitioning in each dimension, so its not that
sophisticated. Is that all you want?
Matt
Hi,
Ya, that's all I want. Btw, how does DMDACreate3d partition the grids in
x,y,z? What is the algorithm behind it?
Supposed I have 14 x 17 x 20 and 12 cores. How does DMDACreate3d
partition it?
Thanks.
--
Thank you.
Yours sincerely,
TAY wee-beng
--
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which
their experiments lead.
-- Norbert Wiener
