Parallel conjugate gradient for poisson equations
 

Hi friends

I am working on implementation of conjugate gradient method specifically for sparse matrix, which arises after discretisation of Poisson equation. i implemented ILU0 preconditioner.
Now i am trying to parallelise the code using MPI command..
In current code needs to exchange information three times among various processor in each iteration of CG , which takes lots of time.
can anyone please suggest me some way to reduce number of data exchange per iterations.


Regards
RV

i got it..
 

i did it... :)
if anyone need the source code for CG,PCG, parallel CG and parallel PCG for solving poisson equation . please mail me rah00002004[at]gmail.com .