Jon Clayden
Fellow #rstats package devs, please save me from myself. Why are the tests for this package, which doesn’t use OpenMP, using 250%+ CPU unless OMP_NUM_THREADS is set? This is rocker/r-devel (Debian/GCC based) on Docker, and no test parallelism is requested. Only dependency is Rcpp
Feb 27, 2024 at 4:31pmWeb
Show threadDirk EddelbuettelFeb 27, 2024
@jonclayden BLAS/LAPACK maybe? Doing any matrix math? OpenBLAS could do that to you but now I no longer remember if I do or do not pick that in that container. `dpkg -l` and `grep` to be sure.
Show threadJon ClaydenFeb 27, 2024
@eddelbuettel Ah yes, libopenblas0-pthread seems to be there, so it could be that. I don't use BLAS directly but presumably this build of R does. Will poke a bit more - thanks