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Default preference for MKL checks if Ryzen #517

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Default preference for MKL checks if Ryzen #517

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11 changes: 10 additions & 1 deletion src/LinearSolve.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -44,7 +44,16 @@ import PrecompileTools

const CRC = ChainRulesCore

if Preferences.@load_preference("LoadMKL_JLL", true)
# Check if Ryzen, since that's where MKL is slow
function is_zen()
# znverX
n = Sys.CPU_NAME
length(n) == 6 || return false
return n[1] == 'z' && n[2] == 'n' && n[3] == 'v' &&
n[4] == 'e' && n[5] == 'r'
end

@static if Preferences.@load_preference("LoadMKL_JLL", is_zen())
using MKL_jll
const usemkl = MKL_jll.is_available()
else
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