about MPI_Comm_size(PETSC_COMM_WORLD,&size)

[Matthew Knepley]

On 10/25/06, Yixun Liu <yxliu at fudan.edu.cn> wrote:
>
>  Hi,
>
> My computer is a standare dual processors PC of Dell corp., but after
> calling   ierr = PI_Comm_size(PETSC_COMM_WORLD,&size), I find the size is
> one. Is it correct?
>

MPI only knows what mpiruns tells it. You ran the exampe with -np 1. If you
use -np 2, then it will have size 2.

  Matt

Best,
>
> Yixun
>
-- 
"Failure has a thousand explanations. Success doesn't need one" -- Sir Alec
Guiness
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