Le dimanche 24 avril 2016 à 08:44 -0700, K leo a écrit : > It is hard to know how to describe my code. So I tried to run it > with the generic version which does use 200% of CPU. So there seems > something different with the Ubuntu version of Julia. OK. Could you at least make a list of linear algebra functions that you are using? It could be that Ubuntu's OpenBLAS doesn't include optimized LAPACK functions.
Regards > I installed under my home folder. I ran it in the following way > hoping that the shared libs are not mixed with the system ones. > > $ ~/Software/julia-2ac304dfba/bin/julia > _ > _ _ _(_)_ | A fresh approach to technical computing > (_) | (_) (_) | Documentation: http://docs.julialang.org > _ _ _| |_ __ _ | Type "?help" for help. > | | | | | | |/ _` | | > | | |_| | | | (_| | | Version 0.4.5 (2016-03-18 00:58 UTC) > _/ |\__'_|_|_|\__'_| | Official http://julialang.org/ release > |__/ | x86_64-unknown-linux-gnu > > > > Le dimanche 24 avril 2016 à 05:38 -0700, K leo a écrit : > > > > > > See below. > > > > > > > Le samedi 23 avril 2016 à 18:10 -0700, K leo a écrit : > > > > > > Le samedi 23 avril 2016 à 04:52 -0700, K leo a écrit : > > > > > > Anyway, > > > > > > the Ubuntu PPA is no longer maintained. The recommended > > solution is to > > > > > > use generic Linux binaries from the Julia website. > > > > > > > > > > > > > > > > On Ubuntu 16.04, Julia 0.4.5 is available on multiverse > > repository > > > > > for some reason. Not sure who maintains it. > > > > Ah, OK, I thought you were using the PPA package. Anyway, > > Ubuntu 16.04 > > > > includes the latest OpenBLAS and the Julia package depends on > > it, so it > > > > should be good. That said, maybe that OpenBLAS library doesn't > > use > > > > threading. > > > > > > > > Can you confirm that running > > > > x=rand(10000,10000); > > > > x*x > > > > does not make Julia use more than 100% CPU? > > > It actually uses close to 200% of CPU. > > OK, so no problem in this area. > > > > I think you'll have to give more details about the code you > > mentioned > > in your first post for us to be able to help. Also, please confirm > > that > > you see the same problem (i.e. code using only one core) with the > > generic Linux binaries. > > > > > > Regards > > > > > > If not, could you post the output of versioninfo()? Finally, > > please run > > > > 'ls -l /usr/lib/julia/', 'ls -l /usr/lib64/julia' from a shell > > and copy > > > > the result. > > > julia> versioninfo() > > > Julia Version 0.4.5 > > > Commit 2ac304d (2016-03-18 00:58 UTC) > > > Platform Info: > > > System: Linux (x86_64-linux-gnu) > > > CPU: Intel(R) Core(TM) i5-5257U CPU @ 2.70GHz > > > WORD_SIZE: 64 > > > BLAS: libopenblas (NO_LAPACKE DYNAMIC_ARCH NO_AFFINITY > > Haswell) > > > LAPACK: libopenblas > > > LIBM: libopenlibm > > > LLVM: libLLVM-3.8 > > > > > > $ ls -l /usr/lib/julia/ > > > ls: cannot access '/usr/lib/julia/': No such file or directory > > > > > > $ ls -l /usr/lib/x86_64-linux-gnu/julia > > > total 26440 > > > lrwxrwxrwx 1 root root 20 Apr 18 17:45 libarpack.so -> > > ../../libarpack.so.2 > > > -rw-r--r-- 1 root root 15608 Apr 18 17:45 libccalltest.so > > > lrwxrwxrwx 1 root root 22 Apr 18 17:45 libcholmod.so -> > > ../libcholmod.so.3.0.6 > > > lrwxrwxrwx 1 root root 22 Apr 18 17:45 libdSFMT.so -> > > ../libdSFMT-19937.so.1 > > > lrwxrwxrwx 1 root root 25 Apr 18 17:45 libfftw3f_threads.so > > -> ../libfftw3f_threads.so.3 > > > lrwxrwxrwx 1 root root 24 Apr 18 17:45 libfftw3_threads.so > > -> ../libfftw3_threads.so.3 > > > lrwxrwxrwx 1 root root 15 Apr 18 17:45 libgmp.so -> > > ../libgmp.so.10 > > > -rw-r--r-- 1 root root 1175608 Apr 18 17:45 libjulia.so > > > lrwxrwxrwx 1 root root 15 Apr 18 17:45 libmpfr.so -> > > ../libmpfr.so.4 > > > lrwxrwxrwx 1 root root 22 Apr 18 17:45 libopenblas.so -> > > ../../libopenblas.so.0 > > > lrwxrwxrwx 1 root root 19 Apr 18 17:45 libopenlibm.so -> > > ../libopenlibm.so.2 > > > lrwxrwxrwx 1 root root 22 Apr 18 17:45 libopenspecfun.so -> > > ../libopenspecfun.so.1 > > > lrwxrwxrwx 1 root root 18 Apr 18 17:45 libpcre2-8.so -> > > ../libpcre2-8.so.0 > > > -rw-r--r-- 1 root root 203048 Apr 18 17:45 libRmath-julia.so > > > lrwxrwxrwx 1 root root 19 Apr 18 17:45 libspqr.so -> > > ../libspqr.so.2.0.2 > > > lrwxrwxrwx 1 root root 32 Apr 18 17:45 > > libsuitesparseconfig.so -> ../libsuitesparseconfig.so.4.4.6 > > > -rw-r--r-- 1 root root 6000 Apr 18 17:45 > > libsuitesparse_wrapper.so > > > lrwxrwxrwx 1 root root 22 Apr 18 17:45 libumfpack.so -> > > ../libumfpack.so.5.7.1 > > > -rw-r--r-- 1 root root 25664120 Apr 18 17:45 sys.so > > > > > > $ ls -l /usr/lib64/julia > > > ls: cannot access '/usr/lib64/julia': No such file or directory > > > > > > > > > > > I'm Ccing Graham Inggs, who maintains the Debian package on > > which the > > > > Ubuntu package is based. > > > > > > > > > > > > Regards
