Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Open MPI User's mailing list

Subject: Re: [OMPI users] slowdown with infiniband and latest CentOS kernel
From: Noam Bernstein (noam.bernstein_at_[hidden])
Date: 2013-12-18 10:19:25

Thanks to all who answered my question. The culprit was an interaction between
1.7.3 not supporting mpi_paffinity_alone (which we were using previously) and the new
kernel. Switching to --bind-to core (actually the environment variable
OMPI_MCA_hwloc_base_binding_policy=core) fixed the problem.


  • application/pkcs7-signature attachment: smime.p7s