#7602: Threaded RTS performing badly on recent OS X (10.8?)
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Reporter: simonmar | Owner:
Type: bug | Status: new
Priority: normal | Milestone: _|_
Component: Runtime System | Version: 7.6.1
Keywords: | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: None/Unknown
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Comment(by thoughtpolice):
Ah, you're very correct. I shouldn't comment on tickets when it's absurdly
late at night and I'm really tired...
Apple has advertised OS X as having TLS since Lion I believe. I think this
really is TLS support. It's just slower than Linux - on Ubuntu 12.10, the
example above moves values directly into ```%fs:0xfffffffffffffff0```. GCC
is just weird here because it's calling into ```libgcc``` first from my
digging (which would maybe mean it's even slower. I haven't tested.)
Modern GCC is at least easily obtainable on OS X, so perhaps this isn't as
bad and it's not worth doing something evil. We'll probably need to fix
other things, so I'll still look into it.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7602#comment:11>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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