Hi Patrick, On Fri, Sep 08, 2017 at 01:17:33PM -0600, Patrick Goetz wrote: > After some > discussion on this list, someone convinced me that setting > "ThreadsPerCore=2" informs Slurm that each CPU actually has 8 cores, so I > set OverSubscribe back to the previous value and now the nodes are > unsubscribed again. The final configuration I tried was this: > > SelectType=select/cons_res > SelectTypeParameters=CR_CPU_Memory > NodeName=n[001-048] Sockets=2 CoresPerSocket=4 ThreadsPerCore=2 > RealMemory=61500 State=UNKNOWN > PartitionName=normal Nodes=n[001-048] Default=YES OverSubscribe=NO > MaxTime=10-0 State=UP > > > and that didn't seem to help; the users still can't get more than 8 tasks on > to a node.
from the slurm.conf manual page: "If your system is configured with more than one thread per core, execution of a different job on each thread is not supported unless you configure SelectTypeParameters=CR_CPU plus CPUs; do not configure Sockets, CoresPerSocket or ThreadsPerCore." So I think you need to get rid of the Sockets, CoresPerSocket, ThreadsPerCore settings and use CPUs=16. Best reagards -- Gennaro Oliva
