Threading in petsc

[Barry Smith]

On Dec 12, 2009, at 2:12 PM, Eugen Wintersberger wrote:

> Hi there
> I am entirely new to petsc. I would like to know if communication  
> between Jobs on a single node is done via threads or mpi.

    The standard model is to have 1 MPI process per core so there is  
no need for or use of threads.

     There is some code in place that allows one to have one MPI  
process per node and use threads within the node to compute the users  
nonlinear function.

     Barry

> Thanks in advance
>       Eugen wintersberger