are you sure that both OpenBLAS and MKL are using the same number of threads? I just did a less scientific, but similar test on a similar intel machine and found the two setups to be comparable.
On Monday, October 24, 2016 at 12:57:20 PM UTC-5, Douglas Bates wrote: > > On a server node > > julia> versioninfo(true) > Julia Version 0.6.0-dev.1108 > Commit 1efe487* (2016-10-24 13:47 UTC) > Platform Info: > OS: Linux (x86_64-linux-gnu) > CPU: Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz > WORD_SIZE: 64 > Ubuntu 14.04.5 LTS > uname: Linux 3.13.0-98-generic #145-Ubuntu SMP Sat Oct 8 20:13:07 UTC > 2016 x86_64 x86_64 > Memory: 62.8109245300293 GB (53626.91796875 MB free) > Uptime: 918243.0 sec > Load Avg: 0.130859375 1.2978515625 2.16796875 > Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz: > speed user nice sys idle > irq > #1-24 1200 MHz 1428837 s 12796 s 3318183 s 2198563210 s > 3 s > > BLAS: libmkl_rt > LAPACK: libmkl_rt > LIBM: libimf > LLVM: libLLVM-3.7.1 (ORCJIT, haswell) > > I am consistently seeing OpenBLAS outperforming MKL by a non-trivial > amount on peakflops(). I find this peculiar. Has anyone else encountered > this? > > _ _ _(_)_ | A fresh approach to technical computing > (_) | (_) (_) | Documentation: http://docs.julialang.org > _ _ _| |_ __ _ | Type "?help" for help. > | | | | | | |/ _` | | > | | |_| | | | (_| | | Version 0.5.0 (2016-09-19 18:14 UTC) > _/ |\__'_|_|_|\__'_| | Official http://julialang.org/ release > |__/ | x86_64-pc-linux-gnu > > julia> versioninfo() > Julia Version 0.5.0 > Commit 3c9d753 (2016-09-19 18:14 UTC) > Platform Info: > System: Linux (x86_64-pc-linux-gnu) > CPU: Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz > WORD_SIZE: 64 > BLAS: libopenblas (USE64BITINT DYNAMIC_ARCH NO_AFFINITY Haswell) > LAPACK: libopenblas64_ > LIBM: libopenlibm > LLVM: libLLVM-3.7.1 (ORCJIT, haswell) > > julia> [peakflops(10000) for i in 1:5] > 5-element Array{Float64,1}: > 2.85895e11 > 2.85431e11 > 2.85906e11 > 2.86397e11 > 2.85005e11 > > julia> > $ ./julia6 > _ > _ _ _(_)_ | A fresh approach to technical computing > (_) | (_) (_) | Documentation: http://docs.julialang.org > _ _ _| |_ __ _ | Type "?help" for help. > | | | | | | |/ _` | | > | | |_| | | | (_| | | Version 0.6.0-dev.1108 (2016-10-24 13:47 UTC) > _/ |\__'_|_|_|\__'_| | Commit 1efe487* (0 days old master) > |__/ | x86_64-linux-gnu > > julia> versioninfo() > Julia Version 0.6.0-dev.1108 > Commit 1efe487* (2016-10-24 13:47 UTC) > DEBUG build > Platform Info: > OS: Linux (x86_64-linux-gnu) > CPU: Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz > WORD_SIZE: 64 > BLAS: libmkl_rt > LAPACK: libmkl_rt > LIBM: libimf > LLVM: libLLVM-3.7.1 (ORCJIT, haswell) > > julia> [peakflops(10000) for i in 1:5] > 5-element Array{Float64,1}: > 2.22788e11 > 2.37729e11 > 2.37163e11 > 2.35563e11 > 2.35813e11 > > -- You received this message because you are subscribed to the Google Groups "julia-stats" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
