[GHC] #8224: Excessive system time -- new IO manager problem?

[GHC]

#8224: Excessive system time -- new IO manager problem?
-------------------------------------+-------------------------------------
        Reporter:  rrnewton          |            Owner:
            Type:  bug               |           Status:  new
        Priority:  high              |        Milestone:  7.8.1
       Component:  Runtime System    |          Version:  7.7
      Resolution:                    |         Keywords:  IO Manager,
Operating System:  Linux             |  System Time
 Type of failure:  Runtime           |     Architecture:  x86_64 (amd64)
  performance bug                    |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by thoughtpolice):

 I haven't tested this (don't have a 32 core machine,) but if the
 `gcWorkerThread` is causing problems, what does it look like when you turn
 off the multicore collector and load balancer? i.e. run with:

 {{{
 $ ./excessive_system +RTS -N -qb -qg
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8224#comment:3>
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