#886: Profiling doesn't work with -threaded
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Reporter: Lemmih | Owner:
Type: task | Status: new
Priority: normal | Milestone: 6.6.1
Component: Compiler | Version: 6.5
Severity: normal | Resolution:
Keywords: | Os: Linux
Difficulty: Unknown | Architecture: x86
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Changes (by simonmar):
* milestone: 6.6 => 6.6.1
* summary: Profiling a threaded application with GHC-6.6rc. => Profiling
doesn't work with -threaded
* type: bug => task
Comment:
The profiling subsystem isn't thread-safe at all, so can't be used with
-threaded. I've made GHC 6.6 emit an error and refuse to compile rather
than generate a crashing binary.
Later, we should fix this. A Big Giant Lock around the profiling
subsystem is probably sufficient - it will introduce a bottleneck with -N2
and greater, but it should be ok with single processor runs.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/886>
GHC <http://www.haskell.org/ghc/>
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