On May 29, 2009, at 12:31 AM, shan axida wrote:
Is it true to use bidirectianal communication with MPI in ethernet
Cluster?
Are you asking if Open MPI uses bi-direction TCP sockets? Yes, it
does: we open one TCP socket between the MPI sender and receiver, and
if the order is reversed
Roman Martonak wrote:
I would like to profile the MPI code using the vampir trace integrated
in openmpi-1.3.2. In order to visualize
the trace files, apart from commercial vampir, is there some free
viewer for the OTF files ?
I'm rusty on this stuff.
If you go to
Jeff Layton wrote:
Jeff Squyres wrote:
On Jun 1, 2009, at 2:04 PM, Jeff Layton wrote:
error: executing task of job 3084 failed: execution daemon on host
"compute-2-2.local" didn't accept task
This looks like an error message from the resource manager/scheduler
-- not from OMPI (i.e., OMPI
HPL can "stress test" the MPI, but it is typically relatively
insensitive to MPI performance. The usual use produces a measure of the
peak floating-point performance of the system.
A broader set of system performance measurements are found in the HPCC
(HPC Challenge) tests, which include
On Jun 1, 2009, at 2:58 PM, Jeff Layton wrote:
>> error: executing task of job 3084 failed: execution daemon on host
>> "compute-2-2.local" didn't accept task
>
> This looks like an error message from the resource manager/scheduler
> -- not from OMPI (i.e., OMPI tried to launch a process on a
On 06/01/09 14:58, Jeff Layton wrote:
Jeff Squyres wrote:
On Jun 1, 2009, at 2:04 PM, Jeff Layton wrote:
error: executing task of job 3084 failed: execution daemon on host
"compute-2-2.local" didn't accept task
This looks like an error message from the resource manager/scheduler
-- not
Jeff Squyres wrote:
On Jun 1, 2009, at 2:04 PM, Jeff Layton wrote:
error: executing task of job 3084 failed: execution daemon on host
"compute-2-2.local" didn't accept task
This looks like an error message from the resource manager/scheduler
-- not from OMPI (i.e., OMPI tried to launch a
On Jun 1, 2009, at 2:04 PM, Jeff Layton wrote:
error: executing task of job 3084 failed: execution daemon on host
"compute-2-2.local" didn't accept task
This looks like an error message from the resource manager/scheduler
-- not from OMPI (i.e., OMPI tried to launch a process on a node and
Good morning,
I think I sent this out last week but I did some "experimentation"
and kind-of/sort-of got my OpenMPI application to run. But I do
have a weird problem.
I can get the application (build with OpenMPI-1.3.2 with gcc and
the app is built with Intel 10.2) to run on the IB network (not
This looks like your compiler seg faulted. I think you should contact
your compiler vendor and find out why.
Additionally, you can disable the optional/3rd-party-add-on
VampirTrace package with --enable-contrib-no-build=vt. This is the
part of the code where your compiler seg faulted, so
Hi,
I have a Multiple Program Multiple Data with three programs running in
parallel, say A, B and C. C is much slower so in order to balance the
load I want to parallelize C into C0 to Cn (SPMD). There are very
frequent communications between Ci processes and not so frequent, but
still
Hi Danesh
Make sure you have 700GB of RAM on the sum of all nodes you are using.
Otherwise context switching and memory swapping may be the problem.
MPI doesn't perform well in this conditions (and may break, particularly
on large problems, I suppose).
A good way to go about it is to look at
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