single threaded atlas

[Rajeev Singh]

Hi,

How can I compile Sage such that atlas gets compiled to use single
thread? I need this because I am writing an explicit parallel code
using Sage's parallel (or mpi4py) and I don't want the individual
processes to start many threads.

Regards,
Rajeev

[Volker Braun]

You can manually replace the atlas/blas libraries with single-threaded versions. 

Also, I think ATLAS is relatively smart about its threshold when it starts using threads. Small matrices are always done in a single thread.