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...ge is mainly used to analyse bioinformatics data, which requires important computing resources. Anyway, it works well on my machine now, and I will modify my package to ensure that users won't encounter this case of "multi" multi-threading. Thanks again, Best, Ghislain Ghislain Durif -------------------------- Research engineer THOTH TEAM INRIA Grenoble Alpes (France) Le 21/08/2017 ? 17:28, Ista Zahn a ?crit : > Hi Ghislain, > > The documentation at > https://cran.r-project.org/doc/manuals/r-release/R-admin.html#BLAS > provides a fair bit of information. What sp...

...e use 'libRblas.so' which explain the difference of behavior. I will use RhpcBLASctl to avoid issue when combining matrix product and other multi-threading package. Maybe this point regarding multi-threading with BLAS could be added in the R doc. Thanks again, Best, Ghislain Ghislain Durif -------------------------- Research engineer THOTH TEAM INRIA Grenoble Alpes (France) Le 21/08/2017 ? 15:53, Tomas Kalibera a ?crit : > Hi Ghislain, > > I think you might be comparing two versions of R with different BLAS > implementations, one that is single threaded (is your 3.3.2 u...

Hi Ghislain, The documentation at https://cran.r-project.org/doc/manuals/r-release/R-admin.html#BLAS provides a fair bit of information. What specifically would you like to see added? Best, Ista On Mon, Aug 21, 2017 at 10:13 AM, Ghislain Durif <ghislain.durif at inria.fr> wrote: > Hi Tomas, > > Thanks for your answer. > > Indeed, I checked and my R-3.4.1 installed from the ubuntu repository use > 'libopenblasp-r0.2.18.so' while my R-3.3.2 that I did compiled on my machine > use 'libRblas.so' whi...

...SAGES=fr_FR.utf8 [7] LC_PAPER=fr_FR.utf8 LC_NAME=C [9] LC_ADDRESS=C LC_TELEPHONE=C [11] LC_MEASUREMENT=fr_FR.utf8 LC_IDENTIFICATION=C attached base packages: [1] stats graphics grDevices utils datasets methods base Thanks in advance, Best regards || -- Ghislain Durif -------------------------- Research engineer THOTH TEAM INRIA Grenoble Alpes (France) [[alternative HTML version deleted]]

...dministrator will configure their BLAS implementation of choice to use the number of threads they need. A similar problem exists in other internally multi-threaded third-party libraries, used by packages - R cannot control how many threads they run. Best Tomas On 08/21/2017 02:55 PM, Ghislain Durif wrote: > Dear R Core Team, > > I wish to report what can be viewed as a bug or at least a strange > behavior in R-3.4.1. I ask my question here (as recommended on > https://www.r-project.org/bugs.html) since I am not member of the R's > Bugzilla. > > When running 'R...