Re: [OMPI users] system call failed that shouldn't?

2016-04-13 Thread Gilles Gouaillardet
Tom, i was able to reproduce the issue with an older v1.10 version, but not with current v1.10 from git. could you please give a try to 1.10.3rc1 available at https://www.open-mpi.org/software/ompi/v1.10/downloads/openmpi-1.10.3rc1.tar.bz2 ? Cheers, Gilles On 4/14/2016 4:05 AM, Tom

Re: [OMPI users] Head Node as a Compute Node

2016-04-13 Thread Gilles Gouaillardet
Matthew, this is generally a bad idea : many users are logged into the login node, some of them run a graphic desktop in VNC, they sometime start (heavy) compilation and once in a while, they even run a (hopefully) small MPI application so they do not have to use the batch manager (e.g. write

[OMPI users] Head Node as a Compute Node

2016-04-13 Thread Matthew Larkin
Has anyone in the users list conducted any kind of analysis about using a head node as a compute node in a distributed system? Does it effect resources, or simply chance performance in any way? Thanks!

[OMPI users] system call failed that shouldn't?

2016-04-13 Thread Tom Rosmond
Hello, In this thread from the Open-MPI archives: https://www.open-mpi.org/community/lists/devel/2014/03/14416.php a strange problem with a system call is discussed, and claimed to be solved. However, in running a simple test program with some new MPI-3 functions, the problem seems to be