Using GPUs with Slurm/fr: Difference between revisions

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=== Ordonnancement d'un nœud ''GPU large'' pour Cedar ===
=== Ordonnancement d'un nœud ''GPU large'' pour Cedar ===


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Sur la grappe [[Cedar/fr|Cedar]] se trouve des nœuds de type ''GPU large'' qui ont chacun quatre cartes Tesla P100 16Go; les autres nœuds sont de 12Go. Les GPUs du groupe spécial utilisent le all use the same PCI switch so the inter-GPU communication latency is lower, but bandwidth between CPU and GPU is lower than on the regular GPU nodes. The nodes also have 256 GB RAM instead of 128GB. In order to use these nodes you must specify <code>lgpu</code>. By-gpu requests can '''only run up to 24 hours'''.
There is a special group of large-memory GPU nodes at [[Cedar]] which have four Tesla P100 16GB cards each. (Other GPUs in the cluster have 12GB.) These GPUs all use the same PCI switch so the inter-GPU communication latency is lower, but bandwidth between CPU and GPU is lower than on the regular GPU nodes. The nodes also have 256 GB RAM instead of 128GB. In order to use these nodes you must specify <code>lgpu</code>. By-gpu requests can '''only run up to 24 hours'''.
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