Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Open MPI User's mailing list

Subject: [OMPI users] Question about tree generation (in parallel)
From: Cristobal Navarro (axischire_at_[hidden])
Date: 2010-06-02 17:03:57


Hello,

i got an algorithm that generates trees, of different sizes, recursively. at
the moment i have the algorithm in its secuential version.

here we have 4 identical computers with Xeon 8-core in each node + 4gb ram.
they have HyperThreading so they count as 16-processors per node.
so i can launch a total of 64 parallel threads.

my question is, what could be the best approach when using MPI.???

assigning -np 64 maybe is not a good idea, because i would not be taking
advantage of the vecinity of cores which could improve memory tasks speeds,
i mean it might be better to have 4 mpi processes and each one of these
spawn 15 threads locally???...(can i mix MPI with local threads right? )

i dont have much experience in MPI, i only programmed bigger algorithms in
CUDA which is much easier.
any suggestions or help is welcome
Cristobal

--
Cristobal <http://www.youtube.com/neoideo>