Hi folks,
recently we’ve been getting a Valgrind error in PMPI_Init for our suite of
regression tests:
==5922== Invalid read of size 4
==5922==at 0x61CC5C0: opal_os_dirpath_create (in
/aia/opt/openmpi-1.8.7/lib64/libopen-pal.so.6.2.2)
==5922==by 0x5F207E5: orte_session_dir (in
/aia/opt
Hi folks,
We are currently encountering a weird file coherence issue when running
parallel jobs with OpenMPI (1.8.7) and writing files in parallel to an
NFS-mounted file system using Parallel netCDF 1.6.1 (which internally uses
MPI-I/O). Sometimes (~30-40% of our samples) we get a file whose co
Hi Gilles,
> are you running 1.8.7 or master ?
1.8.7. We recently upgraded our cluster installation from OpenSUSE 11.3/OpenMPI
1.6.5 to OpenSUSE 12.3/OpenMPI 1.8.7. Before the upgrade, we did not encounter
this problem.
> if not default, which io module are you running ?
> (default is ROMIO wit
Hi Dave,
> That's probably not a good idea. Have you read about NFS in the romio
> README? It's old, but as far as I know, it's still relevant for NFS3.
> Maybe Rob Latham will see this and be able to comment on NFS4.
No, are you referring to the file openmpi-1.8.7/ompi/mca/io/romio/romio/README
mailto:gilles.gouaillar...@gmail.com>> wrote:
Michael,
ROMIO is the default in the 1.8 series
you can run
ompi_info --all | grep io | grep priority
ROMIO priority should be 20 and ompio priority should be 10.
Cheers,
Gilles
On Thursday, July 23, 2015, Schlottke-Lakemper, Michael
mailto
de the space at all
times.
I’d suppress it
On Jul 23, 2015, at 12:47 AM, Schlottke-Lakemper, Michael
mailto:m.schlottke-lakem...@aia.rwth-aachen.de>>
wrote:
Hi folks,
recently we’ve been getting a Valgrind error in PMPI_Init for our suite of
regression tests:
==5922== Invalid read of s
and could not find where such a
thing can happen
Thanks,
Gilles
On Wednesday, July 29, 2015, Thomas Jahns mailto:ja...@dkrz.de>>
wrote:
Hello,
On 07/28/15 17:34, Schlottke-Lakemper, Michael wrote:
That’s what I suspected. Thank you for your confirmation.
you are mistaken, the allocation
Hi folks,
It seems like oversubscription is disabled by default in OpenMPI 1.8.7, at
least when running on a PBS/torque-managed node. When I run a program in
parallel on a node with 8 cores, I am not able to use more than 8 ranks:
> mic@aia272:~> mpirun --display-allocation -n 9 hostname
>
> =
ins so
that we don't oversubscribe allocations given to us by resource managers unless
specifically told to do so.
On Fri, Aug 14, 2015 at 12:52 AM, Schlottke-Lakemper, Michael
mailto:m.schlottke-lakem...@aia.rwth-aachen.de>>
wrote:
Hi folks,
It seems like oversubscription is disab
ooking
>> at the code, it sure seems impossible, but maybe there is some strange
>> path that would break it.
>>
>> On Jul 29, 2015, at 6:29 AM, Schlottke-Lakemper, Michael
>> wrote:
>> If it is helpful, I can try to compile OpenMPI with debug i
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