Re: [OMPI users] open shmem optimization

2014-08-29 Thread Shamis, Pavel
Hi Timur, I don't think this is apples-to-apples comparison. In OpenSHMEM world "MPI_waitall" would be mapped to shmem_quiet(). Even with this mapping, shmem_quiet() has a *stronger* completion semantics if you compare it to MPI_waitall. Quiet guarantees that the data was delivered to a remot

[OMPI users] open shmem optimization

2014-08-29 Thread Timur Ismagilov
Hello! What param can i tune to increase perfomance(scalability) for my app (all to all pattern with message size = constant/nnodes)? I can read  this faq  for mpi, but is it correct for shmem? I have 2 programm doing the same thing(with same input) each node send messages(message size = constan