[OMPI users] An MPI performance related question...

2011-08-11 Thread Yen, Joseph
Hi, Thanks a lot for posting my question. I am using Vampire Trace (VT) library for performance diagnosis and enhancement. An excerpted output of the code profiling using VT looks like the following table where the bottleneck process is named 'sync' (in the first row). I did not know or use a f

Re: [OMPI users] scaling issue beyond 1024 processes

2011-08-11 Thread CB
The job was dispatched by SGE scheduler but the mpi hello binary never gets executed on compute nodes. It appears that the OpenMPI orted is waiting for something as shown below: Master node: 4465 ?Sl 0:05 /usr/local/sge/latest/bin/lx26-amd64/sge_execd 4677 ?S 0:00 \_

Re: [OMPI users] Open MPI via SSH noob issue

2011-08-11 Thread Jeff Squyres
On Aug 11, 2011, at 2:12 AM, Christopher Jones wrote: > Ok - I see what I missed in the FAQ, sorry about thatmy understanding of > the shell is a bit minimal to say the least. I now have my .bashrc files > configured as such on both computers: > > export LD_LIBRARY_PATH=/opt/local/openmpi/l

Re: [OMPI users] Open MPI via SSH noob issue

2011-08-11 Thread Christopher Jones
Hi again, Ok - I see what I missed in the FAQ, sorry about thatmy understanding of the shell is a bit minimal to say the least. I now have my .bashrc files configured as such on both computers: export LD_LIBRARY_PATH=/opt/local/openmpi/lib:{$PATH} export PATH=/opt/local/openmpi/bin:{$PATH}