Hi, I am planning to run a heavy series of matrix operations on a cluster and I was wondering what’s the ideal number of BLAS threads I should use. Assume that I have a machine with 20 cores and 8-16 GB of RAM per core. Does it make sense to use more BLAS threads than cores? If so, is there any rul…

[image] fipelle: Does it make sense to use more BLAS threads than cores? No. Octavian (and MKL) should also both use at most 1 thread per core. Octavian runs on Julia’s threads, rather than being controlled by BLAS.set_num_threads().

Ideal number of BLAS threads

General Usage

photor April 8, 2022, 3:49am 3

Just use

julia -t (number of physical cores)

to start julia for Octavian.jl

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Multi-threaded inverse of a matrix

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Ideal number of BLAS threads

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