What's a consistent set of Intel HPL options?

Question

I'm trying to run the intel version of the HPL benchmark here and I'm a bit confused by the options.

What I want to do (for now) is a single-node run. The node has 2x Xeon Platinum 8276 processors, so 56 cores total. So my PxQ should be 56.

However the intel docs say:

• MPI_PROC_NUM should be equal to PxQ (i.e 56) - this gets passed to mpirun -np
• MPI_PER_NODE should be equal to the number of sockets in the system (i.e. 2) - this gets passed to mpirun -perhost

To me those don't seem consistent? And how does using OMP_NUM_THREADS fit into this?

Answer 1

If you're just doing a single node run there is a different binary for that - you wouldn't use MPI. For Intel's MKL, you would download the library here

Intel has pre-built binaries that are optimized for their various processors. Ex for Xeon it is:

cd /home/grant/Downloads/benchmarks_2024.0/linux/share/mkl/benchmarks/linpack
./runme_xeon64