does anyone turn-on/off numad on their clusters? I'm running RHEL7.9 on Intel CPU's and seeing a heavy performance impact on MPI jobs when running numad.
diagnosis is pretty prelim right now, so i'm light on details. when running numad i'm seeing MPI jobs stall while numad pokes at the job. the stall is notable, like 10-12 seconds it's particularly interesting because if one rank stalls while numad runs, the others wait. once it frees they all continue, but then another rank gets hit, so i end up seeing this cyclic stall like i said i'm still looking into things, but i curious what everyone's take on numa is. my consensus is we probably don't even really need it since slurm/openmpi should be handling process placement anyhow thoughts? _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit https://beowulf.org/cgi-bin/mailman/listinfo/beowulf
