[slurm-users] Slurm -- using GPU cards with NVLINK

David Baker D.J.Baker at soton.ac.uk
Thu Sep 10 15:00:17 UTC 2020


We are installing a group of nodes which all contain 4 GPU cards. The GPUs are paired together using NVLINK as described in the matrix below.

We are familiar with using Slurm to schedule and run jobs on GPU cards, but this is the first time we have dealt with NVLINK enabled GPUs. Could someone please advise us how to configure Slurm so that we can submit jobs to the cards and make use of the NVLINK? That is, what do we need to put in the gres.conf or slurm.conf, and how should users use the sbatch command? I presume, for example, that a user could make use of a GPU card, and potentially make use of memory on the paired card.

Best regards,

[root at alpha51 ~]# nvidia-smi topo --matrix
        GPU0    GPU1    GPU2    GPU3    CPU Affinity    NUMA Affinity
GPU0     X      NV2     SYS     SYS     0,2,4,6,8,10    0
GPU1    NV2      X      SYS     SYS     0,2,4,6,8,10    0
GPU2    SYS     SYS      X      NV2     1,3,5,7,9,11    1
GPU3    SYS     SYS     NV2      X      1,3,5,7,9,11    1
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