Re: [OMPI users] MPI + system() call + Matlab MEX crashes

Matlab may have its own MPI installed. It definitely does if you have the parallel computing toolbox. If you have that, it could be causing problems. If you can, you might consider compiling your Matlab application into a standalone executable, then call that from your own program. That

Re: [OMPI users] MPI + system() call + Matlab MEX crashes

Juraj, if i understand correctly, the "master" task calls MPI_Init(), and then fork matlab. In some cases (lack of hardware support), fork cannot even work. but let's assume it is fine for now. Then, if i read between the lines, matlab calls mexFunction that MPI_Init(). As far as i am

Re: [OMPI users] openmpi and mpi4py compatibility

On 5 October 2016 at 22:29, Mahdi, Sam wrote: > Hi everyone, > > I had a quick question regarding the compatibility of openmpi and mpi4py. > I have openmpi 1.7.3 and mpi4py 1.3.1. I know these are older versions of > each, but I was having some problems running a

Re: [OMPI users] openmpi and mpi4py compatibility

Hi Sam, I am not a developer but I am using mpi4py with openmpi-1.10.2. For that version, most of the functionality works, but I think there are some issues with the mpi_spawn commands. Are you using the spawn commands? I have no experience with the versions you are using, but I thought I'd

[OMPI users] openmpi and mpi4py compatibility

Hi everyone, I had a quick question regarding the compatibility of openmpi and mpi4py. I have openmpi 1.7.3 and mpi4py 1.3.1. I know these are older versions of each, but I was having some problems running a program that uses mpi4py and openmpi, and I wanted to make sure it wasn't a

Re: [OMPI users] centos 7.2 openmpi from repo, stdout issue

Thank you for the sanity check and recommendations. I will post my results here when resolved. Jeff Squyres (jsquyres) wrote: We did have some kind of stdout/stderr truncation issue a little while ago, but I don't remember what version it specifically affected. I would definitely update to at

Re: [OMPI users] centos 7.2 openmpi from repo, stdout issue

We did have some kind of stdout/stderr truncation issue a little while ago, but I don't remember what version it specifically affected. I would definitely update to at least Open MPI 1.10.4 (lots of bug fixes since 1.10.0). Better would be to update to Open MPI 2.0.1 -- that's the current

Re: [OMPI users] not enough slots available

I found that if I put "compute-0-3" in a file (say hosts.txt) and pass that file name via --hostfile, then the error disappears. It is interesting to know what is the difference between these two? I think it is very common to specify the nodes with --host option. Regards, Mahmood On Wed, Oct

[OMPI users] not enough slots available

Sorry about the incomplete message... Is there any idea about the following error? On that node, there are 15 empty cores. $ /share/apps/siesta/openmpi-2.0.1/bin/mpirun --host compute-0-3 -np 2 /share/apps/siesta/siesta-4.0-mpi201/tpar/transiesta < A.fdf

[OMPI users] (no subject)

Hi, Is there any idea about the following error? On that node, there are 15 empty cores. Regards, Mahmood ___ users mailing list users@lists.open-mpi.org https://rfd.newmexicoconsortium.org/mailman/listinfo/users

[OMPI users] centos 7.2 openmpi from repo, stdout issue

$ cat /etc/redhat-release CentOS Linux release 7.2.1511 (Core) $ yum list installed | grep openmpi openmpi.x86_64 1.10.0-10.el7 @base openmpi-devel.x86_64 1.10.0-10.el7 @base (1) When I run $ mpirun -H myhosts -np myprocs executable

Re: [OMPI users] Question on using Github to see bugs fixed in past versions

Additionally: - When Open MPI migrated to github, we only brought over relevant open Trac tickets to Github. As such, many old 1.10 and 1.8 (and earlier) issues were not brought over. - Trac is still available in a read-only manner at https://svn.open-mpi.org/trac/ompi/report. > On Oct 5,

Re: [OMPI users] MPI + system() call + Matlab MEX crashes

Hi Juraj, Although MPI infrastructure may technically support forking, it's known that not all system resources can correctly replicate themselves to forked process. For example, forking inside MPI program with active CUDA driver will result into crash. Why not to compile down the MATLAB into a

[OMPI users] MPI + system() call + Matlab MEX crashes

Hello, I have an application in C++(main.cpp) that is launched with multiple processes via mpirun. Master process calls matlab via system('matlab -nosplash -nodisplay -nojvm -nodesktop -r "interface"'), which executes simple script interface.m that calls mexFunction (mexsolve.cpp) from which I

Re: [OMPI users] Question on using Github to see bugs fixed in past versions

Edwin, changes are summarized in the NEWS file we used to have two github repositories, and they were "merged" recently with github, you can list the closed PR for a given milestone https://github.com/open-mpi/ompi-release/milestones?state=closed then you can click on a milestone, and list