Hi, According to https://slurm.schedmd.com/cpu_management.html, > The default allocation method within a node is cyclic allocation (allocate > available CPUs in a round-robin fashion across the sockets within a node).
Not a native English speaker. I think the sentense means that: if a job allocates 2*n cores (with -c 2*n) on a node with two physical CPUs (sockets), n cores will be allocated on each sockets by default. However, on our cluster core allocation is not evenly across different sockets. I cannot find the problem in our configs. Explicit setting with srun --cpu-bind or --distribution cyclic doesn't work, either. For example: `srun -p cpu1 -c 8` results continuous allocation on a single socket. `srun -p cpu1 -c 14` results allocation of 2 cores + 12 cores. Here is our config and Slurm version is 18.08.0: https://gist.github.com/cuihaoleo/6086cb64f078d86af844b560c5d8228a I really hope to get the default cylic allocation behaviour, so that CPU jobs won't take up cores assigned to GPU devices. Any idea what's wrong with our configs? -- 崔灏 / CUI Hao Homepage: i-yu.me Twitter: @cuihaoleo
