Hi all, First post, and my apologies if this was addressed already elsewhere, but did not seem so to me. This post is (I think) purely about the behavior of sessionInfo() after I switch the BLAS to Apple's Accelerate vecLib.
I installed R 4.2.2 on macOS Monterey 12.6.2 (with an M1 chip) successfully. I run sessionInfo() with the following result: R version 4.2.2 (2022-10-31) Platform: aarch64-apple-darwin20 (64-bit) Running under: macOS Monterey 12.6.2 Matrix products: default BLAS: /Library/Frameworks/R.framework/Versions/4.2-arm64/Resources/lib/libRblas.0.dylib LAPACK: /Library/Frameworks/R.framework/Versions/4.2-arm64/Resources/lib/libRlapack.dylib locale: [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] stats graphics grDevices utils datasets methods base loaded via a namespace (and not attached): [1] compiler_4.2.2 And then I run a small piece of test code (taken from somewhere, sorry, can't recall where): N <- 20000 M <- 2000 X <- matrix(rnorm(N*M),N) system.time(crossprod(X)) with result > system.time(crossprod(X)) user system elapsed 49.471 0.082 49.553 Then I change my BLAS (using the vecLib supplied as part of the R installation package), e.g., in the Terminal app: cd /Library/Frameworks/R.framework/Resources/lib ln -sf libRblas.vecLib.dylib libRblas.dylib Afterwards, I restart R. Re-running the small piece of test code above yields > system.time(crossprod(X)) user system elapsed 0.339 0.015 0.197 which suggests to me that the switch to vecLib did, indeed, succeed. However, sessionInfo() does something unexpected -- it no longer reports anything for the BLAS row: R version 4.2.2 (2022-10-31) Platform: aarch64-apple-darwin20 (64-bit) Running under: macOS Monterey 12.6.2 Matrix products: default LAPACK: /Library/Frameworks/R.framework/Versions/4.2-arm64/Resources/lib/libRlapack.dylib locale: [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] stats graphics grDevices utils datasets methods base loaded via a namespace (and not attached): [1] compiler_4.2.2 Anyone have any leads on whether a) this is a problem, and b) how to fix it (if so)? Seems this has been the case at least for a couple of years, at least based on an only tangentially related past thread (link here <https://stat.ethz.ch/pipermail/r-sig-mac/2020-November/013794.html>) where the responder implicitly shows the same thing -- faster matrix multiplication, but not reporting of BLAS in sessionInfo(). Thanks, David [[alternative HTML version deleted]] _______________________________________________ R-SIG-Mac mailing list R-SIG-Mac@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-mac
