Re: [OMPI users] mpirun only works when -np <4 (Gus Correa)

2009-12-10 Thread Mattijs Janssens
>>etc, while the MPI programs are running. > >>This tends to oversubscribe the cores, and may lead > >> to crashes. > >> > >>2) RAM: > >>Can you mon

Re: [OMPI users] Parallel Quicksort

2009-08-06 Thread Mattijs Janssens
ould be easy to make a test application but you'll need to have OpenFOAM installed. Mattijs -- Mattijs Janssens OpenCFD Ltd. 9 Albert Road, Caversham, Reading RG4 7AN. Tel: +44 (0)118 9471030 Email: m.janss...@opencfd.co.uk URL: http://www.OpenCFD.co.uk

Re: [OMPI users] MPI flavor-agnostic libraries

2009-01-14 Thread Mattijs Janssens
I can see some ways that > might work, but they are pretty complex - for example, I could create an > intercept library that loads a real MPI library explicitly and do whatever > needs be done (for example, translating MPI_Comm parameters). Does anyone > know of anything that might h

Re: [OMPI users] OpenMPI runtime-specific environment variable?

2008-10-21 Thread Mattijs Janssens
- > Brian M. Adams, PhD (bria...@sandia.gov) > Optimization and Uncertainty Estimation > Sandia National Laboratories, Albuquerque, NM > http://www.sandia.gov/~briadam -- Mattijs Janssens OpenCFD Ltd. 9 Albert Road, Caversham, Reading RG4 7AN. Tel: +44 (0)118 9471030 Email: m.janss...@opencfd.co.uk URL: http://www.OpenCFD.co.uk

Re: [OMPI users] weird problem with passing data between nodes

2008-06-13 Thread Mattijs Janssens
Sounds like a typical deadlock situation. All processors are waiting for one another. Not a specialist but from what I know if the messages are small enough they'll be offloaded to kernel/hardware and there is no deadlock. That why it might work for small messages and/or certain mpi