#7602: Threaded RTS performing badly on recent OS X (10.8?) ---------------------------------+------------------------------------------ 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: | ---------------------------------+------------------------------------------ Comment(by thoughtpolice): Ah, I misspoke in earnest without looking more deeply. It does look like the ```callq *(%rdi)``` is the indirection we're still hitting in some sense, although I'm not sure why it's different from apple's implementation in libc: with -O2, this is minimized to a simple load and call, but it's still a significant overhead for the access, at a glance. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7602#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler