#8027: Adding one call to getNumCapabilities triggers performance nose dive (6X
slowdown)
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Reporter: rrnewton | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Runtime System | Version: 7.6.3
Keywords: | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: Runtime performance bug
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Comment(by rrnewton):
UPDATE: I found at least one other way to trigger the bug without calling
those system functions. This makes me think its some kind of compiler bug
(or mis-optimization) rather than a runtime bug.
I would love to know if anyone else can reproduce this problem...
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/8027#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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