Dear Ivan, Yes, you were right....the native BLAS version of my ubuntu system is:
Matrix products: default BLAS: /usr/lib/x86_64-linux-gnu/blas/libblas.so.3.10.0 LAPACK: /usr/lib/x86_64-linux-gnu/lapack/liblapack.so.3.10.0 Updating BLAS with ropenblas(), as you said,is superficial. Will reverting back to you if stuck again....with mclapply.. A million thanks again... THanking you, Yours sincerely, AKSHAY M KULKKARNI ________________________________ From: Ivan Krylov <krylov.r...@gmail.com> Sent: Sunday, June 18, 2023 12:42 AM To: akshay kulkarni <akshay...@hotmail.com> Cc: R help Mailing list <r-help@r-project.org> Subject: Re: [R] inconsistency in mclapply..... � Sat, 17 Jun 2023 18:54:43 +0000 akshay kulkarni <akshay...@hotmail.com> �����: > 1. I was working on a two core machine just to test the > code...tomorrow will be switching to a 48 core machine. Should I > again download the latest openblas from ropenblas() or do you suggest > testing the native openblas that is bundled in Ubuntu What's the version of OpenBLAS in the Ubuntu release you are running? Unless you can see significant improvements regarding your CPU architecture appearing since the version included in Ubuntu was released, there's little reason to install a different version manually. The whole point of a GNU/Linux distro is not having to compile everything yourself. Ubuntu's build of OpenBLAS contains multiple copies of the code targeted at different processors, including yours. > 2. How do you pass the version of openblas to be installed with > ropenblas()? The full file name? or just something like this: > libopenblas_skylakexp-r0.3.23.so ? It looks like this function accepts the names of git tags in the official OpenBLAS Git repository, but it's really the job of the package maintainer to document important arguments like this one properly. You can call bug.report(package = 'ropenblas') or write an e-mail to maintainer('ropenblas') or locate the author's GitHub and ask a question there. -- Best regards, Ivan [[alternative HTML version deleted]]
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