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  • #11054
Closed
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Created Nov 02, 2015 by varosi@varosi

GHC on Windows could not use more than 64 logical processors

I found that GHC runtime does not take advantage of processor groups under Windows. So it cannot use more than 64 logical processors (2x 18 core physical + HT).

This is Reddit thread about: https://www.reddit.com/r/haskell/comments/3q1r0o/ghc_on_numa_72_core_2_processor_machine_cannot/

MSDN link https://msdn.microsoft.com/en-us/library/windows/desktop/dd405503(v=vs.85).aspx

Trac metadata
Trac field Value
Version 7.10.2
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Runtime System
Test case
Differential revisions
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CC simonmar
Operating system
Architecture
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