# How to correctly install Julia in Renoir platform?

**URL:** <https://discourse.julialang.org/t/how-to-correctly-install-julia-in-renoir-platform/43756>\
**Category:** New to Julia\
**Tags:** installation\
**Created:** [July 27, 2020, 11:43am UTC](https://discourse.julialang.org/t/how-to-correctly-install-julia-in-renoir-platform/43756 "2020-07-27T11:43:43Z")\
**Posts on this page:** 1\
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**Author:** ![tbeason](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tbeason/32/15898_2.png) [@tbeason](https://discourse.julialang.org/u/tbeason)\
**Post date:** [July 27, 2020, 3:25pm UTC](https://discourse.julialang.org/t/how-to-correctly-install-julia-in-renoir-platform/43756/2 "2020-07-27T15:25:00Z")

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Did you ever check how many threads BLAS was using? It is possible that you were not fully utilizing your CPU on your first tests. For example, I get about 5.7e10 with only 1 thread, but like 2.4e11 with 6 threads.

See this discussion

> [@Maximum BLAS threads number](https://discourse.julialang.org/t/maximum-blas-threads-number/25320):
>
> Hi, consider the following example: julia\> versioninfo() Julia Version 1.1.1 Commit 55e36cc308 (2019-05-16 04:10 UTC) Platform Info: OS: Linux (x86\_64-pc-linux-gnu) CPU: Intel(R) Xeon(R) Gold 6136 CPU @ 3.00GHz WORD\_SIZE: 64 LIBM: libopenlibm LLVM: libLLVM-6.0.1 (ORCJIT, skylake) Environment: JULIA\_NUM\_THREADS = 24 julia\> using LinearAlgebra julia\> BLAS.set\_num\_threads(24) julia\> ccall((:openblas\_get\_num\_threads64\_, Base.libblas\_name), Cint, ()) 16 julia\> BLAS.set\_num\_threads(12…

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