Hello Castain,
Thank you for your reply!
Actually, the thing I'm doing now is that I want to see how
many OpenMPI jobs can be handled in one computer at the same ...
So I'm trying to figure out the reason of the problem that I meet now.
It seems that it's not the limit of OpenMPI, and the real
Hi Pavel,
Does that mean, if there is a AllGatherV and assuming that every process
belongs to default comm, there will n-1 Queue Pair between the collecting
process and other processes ?
n = total number of MPI processes.
--
Joba
On Thu, Jun 6, 2013 at 3:37 PM, Shamis, Pavel wrote:
> Default
+1
Depending on how much you care, you might also want to look at some performance
analysis tools to look and see what is happening under the covers. The Intel
VTune suite is the gold standard -- it shows all the counters and statistics
from the CPUs themselves (be aware that there's a bit of
My bad. Just a dumb mistake. Load-balance, as Ralph suggested. I had decomposed
into 16 equally sized parts which didn't map well to 15 cores.
Regarding VTune, we have a code that doesn't scale well so that's a good tip.
I have access to VTune, I've used it. But I only remember looking at Open
On Jun 7, 2013, at 5:28 AM, "Blosch, Edwin L" wrote:
> Regarding VTune, we have a code that doesn't scale well so that's a good tip.
> I have access to VTune, I've used it. But I only remember looking at
> OpenMP, I didn't know it could handle MPI runs. That would be great.
You might have
On Jun 6, 2013, at 10:33 PM, vacate wrote:
> Hello Castain,
>
> Thank you for your reply!
>
> Actually, the thing I'm doing now is that I want to see how many OpenMPI jobs
> can be handled in one computer at the same ...
That is a simple question to answer. If you don't care about performanc
Does that mean, if there is a AllGatherV and assuming that every process
belongs to default comm, there will n-1 Queue Pair between the collecting
process and other processes ?
n = total number of MPI processes.
The answer depends on multiple parameters, like number of processes, message
size,
Interesting.
I would like to understand more on how QP implementation in OpenMPI, for
example, heuristics behind creating multiple QPs between two mpi processes.
Is there any whitepaper / reference / manual that I can refer to for that?
Or can you point me to the source code region for this?
Th
http://www.open-mpi.org/papers/euro-pvmmpi-2007-ib/
On Jun 7, 2013, at 11:11 AM, Jingcha Joba wrote:
> Interesting.
>
> I would like to understand more on how QP implementation in OpenMPI, for
> example, heuristics behind creating multiple QPs between two mpi processes.
>
> Is there any whi
Hi guys,
I'm having trouble with Open MPI and BLCR. The Open MPI version is 1.5.4
and BLCR version is 0.8.5
I am running the process with mpirun -am ft-enable-cr.
When I try to checkpoint the mpirun process with ompi-checkpoint PID
_of_mpirun, the process dies. A global snapshot directory is cr
10 matches
Mail list logo
