Re: [hwloc-users] AMD EPYC topology

2017-12-29 Thread Matthew Scutter
Following up on this, Indeed with a recent kernel the error message goes away. The poor performance stays though (a few percent difference between 4.13 and 4.15rc5), and I'm at a loss as to whether it's related to MPI or not. I see oddities such as locking the job to the first 12 cores yield 100%

[hwloc-users] AMD EPYC topology

2017-12-24 Thread Matthew Scutter
I'm getting poor performance on OpenMPI tasks on a new AMD 7401P EPYC server. I suspect hwloc providing a poor topology may have something to do with it as I receive this warning below when creating a job. Requested data files available at http://static.skysight.io/out.tgz Cheers, Matthew