Le jeudi 30 avril 2020 à 10:43 -0500, Dirk Eddelbuettel a écrit : > On the r-sig-debian list (hosted by the R Project for users of R on Debian > and Ubuntu) someone pointed out that R hangs on simple calls into OpenBLAS > Pthread, i.e. /usr/lib/x86_64-linux-gnu/openblas-pthread/libblas.so.3 > > To witness, just launch R and issue the example(solve) which spends two > lines setting a helper Hilbert function and input data with it and then hangs > on the actual call to solve() (see below for full example) > > Is this a known issue? Do we need to set some OpenMP env vars to limit thread > use? The problem was there in the past but was solved. I don’t know why it is happening again. See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=739331 Also note that (in unstable/testing) there are now OpenMP and single- threaded flavours of OpenBLAS (in packages libopenblas0-openmp and libopenblas0-serial). As a workaround, you can try to install one of these two (and adjust the BLAS alternatives accordingly). Best, -- ⢀⣴⠾⠻⢶⣦⠀ Sébastien Villemot ⣾⠁⢠⠒⠀⣿⡁ Debian Developer ⢿⡄⠘⠷⠚⠋⠀ https://sebastien.villemot.name ⠈⠳⣄⠀⠀⠀⠀ https://www.debian.org
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