Step 1: Run basic benchmark using azhpc

devitocodes / azhpc

Devito MPI strong scaling POC using azhpc

MIT License

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Step 1: Run basic benchmark using azhpc #1

Open ggorman opened 4 years ago

ggorman commented 4 years ago

See installation and basic benchmark in https://github.com/devitocodes/azhpc/blob/master/README.md

Requirements:

Infiniband enabled MPI
One MPI process per socket
OMP_NUM_THREADS=number of physical sockets per socket
Proximity placement to optimise communication with neighbours.
Don't need parallel/POSIX file system for this POC

mloubout commented 4 years ago

One MPI process per socket

Depends on the nodes, if you run on IB** ones (the fancy HPC ones) these are weird AMD chips with 2 sockets but 30 NUMA(on the IB_120, 15 NUMA on IB_60) domains so lot better to run with one process per NUMA domain. and very little openmp (4 threads per numa domain).

ggorman commented 4 years ago

From my perspective, the point is this issue to 'knowledge capture' these as options/parameters in the first instance. We can always drop then later as specific platforms.