Re: [OMPI users] OMPI users] upgraded mpi and R and now cannot find slots

Not sure exactly how but back up and running, with all cores. Thanks to all. Hopefully the new binary for Ubuntu with open-mpi 3.0.0 won't be too far away. Very Best, J On 3 October 2017 at 21:06, r...@open-mpi.org wrote: > You can add it to the default MCA param file, if

Re: [OMPI users] OMPI users] upgraded mpi and R and now cannot find slots

You can add it to the default MCA param file, if you want - /etc/openmpi-mca-params.conf > On Oct 3, 2017, at 12:44 PM, Jim Maas wrote: > > Thanks RHC where do I put that so it will be in the environment? > > J > > On 3 October 2017 at 16:01, r...@open-mpi.org

Re: [OMPI users] OMPI users] upgraded mpi and R and now cannot find slots

Thanks RHC where do I put that so it will be in the environment? J On 3 October 2017 at 16:01, r...@open-mpi.org wrote: > As Gilles said, we default to slots = cores, not HTs. If you want to treat > HTs as independent cpus, then you need to add >

Re: [OMPI users] OMPI users] upgraded mpi and R and now cannot find slots

As Gilles said, we default to slots = cores, not HTs. If you want to treat HTs as independent cpus, then you need to add OMPI_MCA_hwloc_base_use_hwthreads_as_cpus=1 in your environment. > On Oct 3, 2017, at 7:27 AM, Jim Maas wrote: > > Tried this and got this error, and

Re: [OMPI users] OMPI users] upgraded mpi and R and now cannot find slots

Tried this and got this error, and slots are available, nothing else is running. > cl <- startMPIcluster(count=7) -- There are not enough slots available in the system to satisfy the 7 slots that were requested by the

Re: [OMPI users] OMPI users] upgraded mpi and R and now cannot find slots

Previously it worked fine if I asked for 12, I'm sure you are correct, it is only 6 physical cores, but with hyperthreading or whatever, it looks like 12. The system monitor shows 12. Thanks J On 3 October 2017 at 15:07, Gilles Gouaillardet < gilles.gouaillar...@gmail.com> wrote: > Thanks, i

Re: [OMPI users] OMPI users] upgraded mpi and R and now cannot find slots

Thanks, i will have a look at it. By default, a slot is a core, so there are 6 slots on your system. Could your app spawn 6 procs on top of the initial proc ? That would be 7 slots and there are only 6. What if you ask 5 slots only ? With some parameters i do not know off hand, you could either