[GHC] #8733: I/O manager causes unnecessary syscalls in send/recv loops

[GHC]

#8733: I/O manager causes unnecessary syscalls in send/recv loops
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        Reporter:  tibbe                    |            Owner:
            Type:  bug                      |           Status:  new
        Priority:  normal                   |        Milestone:  7.10.1
       Component:  Runtime System           |          Version:  7.6.3
      Resolution:                           |         Keywords:
Operating System:  Unknown/Multiple         |     Architecture:
 Type of failure:  Runtime performance bug  |  Unknown/Multiple
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:
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Comment (by tibbe):

 Replying to [comment:10 simonmar]:
 > If you used blocking syscalls you'd end up with much worse scaling,
 that's why we have the IO manager, no?

 Sure. I guess I'm saying that the I/O manager makes some things better and
 some things worse. This bug is a bit nebulous. I'm not sure there's a good
 solution without involving the user. However, we should at least think
 about it as this will come up in more or less every server we write.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8733#comment:11>
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