[slurm-users] Re: Job running slower when using Slurm

2025-04-24 Thread Jeffrey Layton via slurm-users
Hmm.. Good idea. I'll start looking at that. Thanks! Jeff On Thu, Apr 24, 2025 at 11:02 AM Cutts, Tim via slurm-users < slurm-users@lists.schedmd.com> wrote: > I wonder whether there might be core-pinning/NUMA toplogy/hyperthreading > sort of thing going on here? > > If the code run outside S

[slurm-users] Re: Job running slower when using Slurm

2025-04-24 Thread Cutts, Tim via slurm-users
I wonder whether there might be core-pinning/NUMA toplogy/hyperthreading sort of thing going on here? If the code run outside SLURM runs faster, on the same hardware, than when run under SLURM, it might be because some of the cores SLURM has confined the cgroup to are hyperthreads on a single p

[slurm-users] Re: Job running slower when using Slurm

2025-04-24 Thread Jeffrey Layton via slurm-users
Thanks for the suggestion but I already do that. Jeff On Wed, Apr 23, 2025 at 4:45 PM Feng Zhang wrote: > Beside slurm options, you might also need to set OpenMP env variable: > > export OMP_NUM_THREADS=32 (the core, not thread number) > > Also other similar env variables, if you use any Pytho