[mpich-discuss] Deadlock in MPI_Ibarrier over ch3:sock

[Jeff Hammond]

>> How is this not a no-op implementation for MPI_COMM_SELF?  All you
>> need to support is load-store on local memory, no?
>
> We also need to support all of the RMA communication and synchronization
> operations.  This is not an overly complex or large task, it's just
> currently lower priority that others.  That said, if shared memory window
> support in ch3:sock is something that would prevent you or anyone else from
> using MPI 3.0 RMA, please speak up and I'll make it higher priority.

I recant my previous statement on account of ignorance and because I
don't use ch3:sock and prefer you not worry about this.  It's not like
PETSc is using MPI_WIN_ALLOCATE_SHARED right now anyways.

Jeff

-- 
Jeff Hammond
Argonne Leadership Computing Facility
University of Chicago Computation Institute
jhammond at alcf.anl.gov / (630) 252-5381
http://www.linkedin.com/in/jeffhammond
https://wiki.alcf.anl.gov/parts/index.php/User:Jhammond