Hello all, I am using OMPI 1.2.4 on a Linux cluster (Rocks 4.2). OMPI was
configured to use the
Pathscale Compiler Suite installed in the (NFS mounted on nodes)
/home/PROGRAMS/pathscale. I am
trying to compile and run the example1.f that comes with the ACML package from
AMD, and I am
unable
You could try the following MCA setting in your mpirun command
--mca mpi_yield_when_idle 1
Dear Barry and Jeff,
using OpenMPI we are experimenting something like the behaviour reported
by Barry.
Let me to introduce the context:
we are using RHEL4 U4 on 2 way, AMD Opteron dual core, nodes.
Each node is equipped with 16 GB of RAM, plus 4 GB of SWAP.
OpenMPi is 1.2.2.
Sometimes, for jo
Has anyone had trouble using flash with openmpi? We get segfaults
when flash tries to write checkpoints.
Note that we had to compile flash+hdf5 with -mcmodel=medium (pgi
compilers) because flash statically allocates memory (bad).
Just wondering if others have ran into this before.
Brock Pal
See this FAQ:
http://icl.cs.utk.edu/open-mpi/faq/?category=running#oversubscribing
OMPI by default assumes that each process has its own cpu, thus
aggressively looks for data to receive. I think there is a way to
yield the processor if you want, but I think what your seeing is
behavior yo
Well, I have noticed that when a process is waiting for communication
from another process the reported CPU usage remains around 100%. Is
that what you mean? I haven't explored whether these processes give way
to other active processes under the linux scheduler, nor whether I
should expect anythi
We've observed an excessive use of CPU system resources with OpenMPI
1.2.4 using TCP connections only on our SL5 x86_64 Cluster. Typically,
for a simple Canonical Ring Program, we're seeing between 30 and 70%
system usage.
Has anybody else noticed this sort of behaviour?
And does anybody have some
