[mpich-discuss] Shared memory segment size

Pavan Balaji balaji at mcs.anl.gov
Mon Jul 9 19:27:05 CDT 2012

On 07/09/2012 07:21 PM, Ramesh Vinayagam wrote:
> I am trying to run a program with processes creating a shared memory
> segment to share information and I am using mpich2 for creating
> processes. It works alright for small segment sizes, but for sizes
> beyond 16MB, there is a memory allocation problem. Is there a limit on
> the shared memory segment size per process in mpich2. If so is there a
> way to change it?

MPICH2 does not impose any limit on user-created shared memory segments. 
  This limit would be coming from the OS.  MPICH2 uses shared memory 
internally as well, but I presume you are not talking about that.

  -- Pavan

Pavan Balaji

More information about the mpich-discuss mailing list