I experienced the same thing. I switched to libRblas.vecLib.dylib and got the remarkable speedup in matrix multiplication, but sessionInfo doersn't show that I'm using it. MacBook Pro (14-inch, 2021)
sessionInfo() 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 Random number generation: RNG: Mersenne-Twister Normal: Inversion Sample: Rounding 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] datasets parallel utils stats graphics grDevices methods base other attached packages: [1] showtext_0.9-5 showtextdb_3.0 sysfonts_0.8.8 data.table_1.14.6 nlme_3.1-160 MASS_7.3-58.1 loaded via a namespace (and not attached): [1] compiler_4.2.2 tools_4.2.2 grid_4.2.2 lattice_0.20-45 R 4.2.2 GUI 1.79 Big Sur ARM build (8160) On Mon, Jan 9, 2023 at 5:25 PM David Novgorodsky < david.novgorod...@gmail.com> wrote: > 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 > [[alternative HTML version deleted]] _______________________________________________ R-SIG-Mac mailing list R-SIG-Mac@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-mac
