On Mon, 29 Apr 2019 23:44:42 +0000 "Wang, Zhu" <wan...@uthscsa.edu> wrote:
> sessionInfo() > R version 3.5.2 (2018-12-20) > Platform: x86_64-pc-linux-gnu (64-bit) > Running under: Ubuntu 18.04.2 LTS Which BLAS implementation do you use? One popular implementation, OpenBLAS, spawns multiple threads to do some operations faster; the threads can compete against each other for CPU resources if resulting number of processes * threads per process is more than what CPU can handle. How many CPU cores does your system have? Does this include SMT (also known as hyper-threading on Intel processors)? While some problems benefit from processor pipeline being able to fetch from multiple threads at the same time, for others it's more of a bottleneck. It may help to decrease the n.cores parameter. -- Best regards, Ivan ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
