# How can I make Flux use all my CPUs?

**URL:** <https://discourse.julialang.org/t/how-can-i-make-flux-use-all-my-cpus/21869>\
**Category:** General Usage\
**Created:** [March 14, 2019, 2:09pm UTC](https://discourse.julialang.org/t/how-can-i-make-flux-use-all-my-cpus/21869 "2019-03-14T14:09:54Z")\
**Posts on this page:** 1\
**Showing post:** 11

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**Author:** ![jpsamaroo](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jpsamaroo/32/46804_2.png) [@jpsamaroo](https://discourse.julialang.org/u/jpsamaroo)\
**Post date:** [March 15, 2019, 7:58pm UTC](https://discourse.julialang.org/t/how-can-i-make-flux-use-all-my-cpus/21869/11 "2019-03-15T19:58:02Z")

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I didn’t know this before, but apparently Julia’s OpenBLAS is hard-capped to 16 threads (which may show up as 800% CPU on your system): [OpenBLAS: Julia slower than R - #17 by Elrod](https://discourse.julialang.org/t/julia-slower-than-r/21594/17)

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