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Support larger machines with OpenBLAS #323

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eschnett opened this issue Mar 31, 2016 · 6 comments
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Support larger machines with OpenBLAS #323

eschnett opened this issue Mar 31, 2016 · 6 comments
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building Build system, or building Julia or its dependencies upstream The issue is with an upstream dependency, e.g. LLVM

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@eschnett
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Julia's deps/Makefile contains these lines:

# On linux, try to provision for the largest possible machine currently
OPENBLAS_BUILD_OPTS += NUM_THREADS=16

We have a system with 28 cores, and larger systems exist. Should this limit be increased?
@yuyichao
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Maybe ref OpenMathLib/OpenBLAS#103

@andreasnoack
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It would be great to be able to set this with variable in Make.user.

@Keno
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Keno commented Mar 31, 2016

The comment is misleading. @vtjnash explained what this number actually is in JuliaLang/julia#14857

@eschnett
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eschnett commented Apr 1, 2016

@vtjnash Can you suggest a better formulation for this comment?

@ViralBShah
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The only way is to try this out, but we want a small default also for memory allocation reasons.

@kshyatt kshyatt added building Build system, or building Julia or its dependencies linear algebra labels May 9, 2016
@tkelman tkelman mentioned this issue Sep 22, 2016
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@ViralBShah
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Increasing this limit severely increases the amount of memory as @vtjnash mentions in JuliaLang/julia#14857 (comment)

Thus, it is unlikely the defaults will change unless upstream does something about it.

@ViralBShah ViralBShah added the upstream The issue is with an upstream dependency, e.g. LLVM label May 25, 2018
@ViralBShah ViralBShah mentioned this issue May 25, 2018
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@KristofferC KristofferC transferred this issue from JuliaLang/julia Nov 26, 2024
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@eschnett @andreasnoack @yuyichao @ViralBShah @kshyatt @Keno