[GHC] #3553: parallel gc suffers badly if one thread is descheduled

[GHC]

#3553: parallel gc suffers badly if one thread is descheduled
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        Reporter:  simonmar          |                Owner:  simonmar
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  6.12.2
       Component:  Runtime System    |              Version:  6.10.4
      Resolution:  fixed             |             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 nh2):

 Replying to [comment:8 wuzzeb]:
 > There is a recent patch to the linux kernel to implement a futux which
 spins in the kernel, see http://thread.gmane.org/gmane.linux.kernel/970412

 This link is dead now.

 I suspect it was "futex: FUTEX_LOCK with optional adaptive spinning" as
 described by LWN: https://lwn.net/Articles/387246/

 There are now also two newer articles / patch sets about futexes:

 * https://lwn.net/Articles/704843/ (directly related to the above one)
 * https://lwn.net/Articles/685769/

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/3553#comment:16>
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