| Version: | 0.23-42 |
| Date: | 2023-02-11 |
| Title: | Control the Number of Threads on 'BLAS' |
| Author: | Junji NAKANO <nakanoj@ism.ac.jp> and Ei-ji Nakama <nakama@ki.rim.or.jp> |
| Maintainer: | Ei-ji Nakama <nakama@ki.rim.or.jp> |
| Description: | Control the number of threads on 'BLAS' (Aka 'GotoBLAS', 'OpenBLAS', 'ACML', 'BLIS' and 'MKL'). And possible to control the number of threads in 'OpenMP'. Get a number of logical cores and physical cores if feasible. |
| License: | AGPL-3 |
| URL: | https://prs.ism.ac.jp/~nakama/Rhpc/ |
| ByteCompile: | true |
| NeedsCompilation: | yes |
| Packaged: | 2023-02-11 00:17:46 UTC; nakama |
| Repository: | CRAN |
| Date/Publication: | 2023-02-11 01:00:02 UTC |
Control the number of threads on BLAS
Description
Control the number of threads on 'BLAS' (Aka 'GotoBLAS', 'ACML' and 'MKL').
If you build R directly on Windows and the BLAS file name is not 'Rblas.dll', you can give it as 'options ("RhpcBLASctl.win.Rblas.name" = "boofoo.dll")'.
openmp-related functions only work at build-time instructions. Omp_get * now returns NA_Integer if R was not built with openmp instructions. NOTE: if R itself is built without OpenMP instructions and BLAS thread is used with OpenMP, this package will not work...XD
Usage
get_num_cores()
get_num_procs()
blas_get_num_procs()
blas_set_num_threads(threads)
omp_get_num_procs()
omp_get_max_threads()
omp_set_num_threads(threads)
Arguments
threads |
Number of threads |
Details
https://prs.ism.ac.jp/~nakama/Rhpc/
Value
get_num_cores |
Number of CPU physical processor. NOTE:Returns 1L if unknown |
get_num_procs |
Number of CPU logical processor. NOTE:Returns 1L if unknown |
blas_get_num_procs |
Number of available cores for the optimized BLAS. NOTE:Returns 1L if unknown |
omp_get_num_procs |
Result from OpenMP's omp_get_num_procs function. NOTE Returns NA_integer_ if unknown |
omp_get_max_threads |
Result from OpenMP's omp_get_max_threads function. NOTE Returns NA_integer_ if unknown |
Author(s)
Junji NAKANO <nakanoj@ism.ac.jp> and Ei-ji Nakama<nakama@com-one.com> Maintainer: Ei-ji Nakama <nakama@com-one.com>
Examples
get_num_cores()
get_num_procs()
blas_get_num_procs()
blas_set_num_threads(2)
omp_get_num_procs()
omp_get_max_threads()
omp_set_num_threads(2)