Multiple cores are used in simple for loop

On Fri, Jan 15, 2016 at 10:15 AM, Daniel Kaschek
Dear Martyn,

On Fr, Jan 15, 2016 at 4:01 , Martyn Plummer <plummerm at iarc.fr> wrote:

Alternatively, you may be able to control the maximum number of threads
by setting and exporting an appropriate environment variable depending
on what backend you are using, e.g. OPENBLAS_NUM_THREADS or
MKL_NUM_THREADS.

Thanks a lot. Running

export OPENBLAS_NUM_THREADS = 1

in the bash before starting R solves both problems!
I don't have builds so I can try myself, but as an alternative, is it
possible to set this environment variable in ~/.Renviron, or is that
too late in the R startup process?  What about
Sys.setenv(OPENBLAS_NUM_THREADS=1) in ~/.Rprofile?

/Henrik

Cheers,
Daniel

______________________________________________
R-devel at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel

Multiple cores are used in simple for loop

Thread (4 messages)