patch applied (ghc): Initial parallel GC support

[Simon Marlow]

Wed Oct 31 06:07:18 PDT 2007  Simon Marlow <simonmar at microsoft.com>
  * Initial parallel GC support
  
  eg. use +RTS -g2 -RTS for 2 threads.  Only major GCs are parallelised,
  minor GCs are still sequential. Don't use more threads than you
  have CPUs.
  
  It works most of the time, although you won't see much speedup yet.
  Tuning and more work on stability still required.

    M ./includes/ClosureTypes.h -1 +2
    M ./rts/ClosureFlags.c -2 +3
    M ./rts/StgMiscClosures.cmm -4 +1
    M ./rts/sm/BlockAlloc.c -2 +4
    M ./rts/sm/Evac.c -136 +211
    M ./rts/sm/GC.c -45 +196
    M ./rts/sm/GC.h -1 +10
    M ./rts/sm/Scav.c -10 +55
    M ./rts/sm/Scav.h -2 +3

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20071031130718-760e2-feaa160e2073fb3214bb704c113ab40e9e757c01.gz