[GHC] #635: Replace use of select() in the I/O manager with epoll/kqueue/etc.

[GHC]

#635: Replace use of select() in the I/O manager with epoll/kqueue/etc.
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  Reporter:  simonmar                    |          Owner:  bos             
      Type:  task                        |         Status:  new             
  Priority:  normal                      |      Milestone:  _|_             
 Component:  libraries/base              |        Version:  6.4.1           
Resolution:                              |       Keywords:                  
Difficulty:  Project (more than a week)  |             Os:  Unknown/Multiple
  Testcase:  N/A                         |   Architecture:  Unknown/Multiple
   Failure:  Runtime performance bug     |  
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Comment (by simonmar):

 This does look like a step in the right direction.  How does this compare
 in performance to the select version?  Glancing at the patch it looks like
 building the fdset will be more expensive than before.  There's one
 withForeignPtr per FD.  The INLINEs on the C functions don't have any
 effect (unfortunately), even with `-fvia-C`.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/635#comment:24>
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