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

2 Likes

Multi-threaded inverse of a matrix

Topic		Replies	Views
Maximum BLAS threads number General Usage question	2	1592	June 15, 2019
BLAS thread count vs Julia thread count General Usage question , performance , linearalgebra	21	2597	April 6, 2021
Multithreading using more CPUs than expected Performance	11	497	July 20, 2023
Is the Julia linear algebra multithreaded? General Usage	6	2668	February 7, 2018
Question about Setting BLAS Threads on Cluster General Usage blas , hpc , multithreading , vscode	0	195	January 16, 2024

Ideal number of BLAS threads

Related topics