Re: send array using MPI
- From: Michael Wild <themiwi@xxxxxxxxxxxxxxx>
- Date: Wed, 29 Mar 2006 10:00:25 +0200
Fabian Braennstroem wrote:
Hi,
I try to write a small fortran/mpi program to solve the
poisson eqn. To accomplish that, I have to send a part of
the calculated 2D array to the other processors.
The array is defined in a COMMON file: f(i,j) with i=100 and
j=100.
I want to send the values for j=10 and i=1 to 100; so I
actually send 100 values to the other processors.
My problem is, that I do not know, how I declare the range
of the sending array to the MPI_SEND routine.
CALL MPI_Send(f(1,100),count,MPI_FLOAT,1, 0,MPI_COMM_WORLD, ierr)
'count' should be set to 100, but how can I declare the
range!?
Would be nice, if you have an idea, how I can do that in
fortran77!
Greetings!
Fabian
why do you pass f(1,100)? pass it f(1,10) and count=100. as fortran stores column major, there's no problem. it will start in column 10, row 1 and send off until column 10, row 100.
michael
.
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