Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Limit initial OpenBLAS thread count #46844

Merged
merged 2 commits into from
Nov 15, 2022
Merged

Limit initial OpenBLAS thread count #46844

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
f66db7d
Limit initial OpenBLAS thread count
staticfloat Sep 20, 2022
e8dba44
Support older names
staticfloat Sep 20, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
13 changes: 13 additions & 0 deletions stdlib/OpenBLAS_jll/src/OpenBLAS_jll.jl
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,19 @@ function __init__()
ENV["OPENBLAS_MAIN_FREE"] = "1"
end

# Ensure that OpenBLAS does not grab a huge amount of memory at first,
# since it instantly allocates scratch buffer space for the number of
# threads it thinks it needs to use.
# X-ref: https://github.com/xianyi/OpenBLAS/blob/c43ec53bdd00d9423fc609d7b7ecb35e7bf41b85/README.md#setting-the-number-of-threads-using-environment-variables
# X-ref: https://github.com/JuliaLang/julia/issues/45434
if !haskey(ENV, "OPENBLAS_NUM_THREADS") &&
!haskey(ENV, "GOTO_NUM_THREADS") &&
!haskey(ENV, "OMP_NUM_THREADS")
# We set this to `1` here, and then LinearAlgebra will update
# to the true value in its `__init__()` function.
ENV["OPENBLAS_NUM_THREADS"] = "1"
end

global libopenblas_handle = dlopen(libopenblas)
global libopenblas_path = dlpath(libopenblas_handle)
global artifact_dir = dirname(Sys.BINDIR)
Expand Down