[GHC] #14981: GHC parallel GC is not doing well on modern many-core machine

[GHC]

#14981: GHC parallel GC is not doing well on modern many-core machine
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        Reporter:  varosi            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Runtime System    |              Version:  8.4.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by jberryman):

 varosi, my understanding is that only collecting the oldest generation
 should stop the world. It's possible I'm mistaken or misinterpreting the
 threadscope profile though.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14981#comment:4>
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