Tue Sep 29 06:07:22 PDT 2009 Simon Marlow <[email protected]>
* Use "rep; nop" inside a spin-lock loop on x86/x86-64
Ignore-this: 3fed098d63dc5ea576779f17afe4b6d9
This helps on a hyperthreaded CPU by yielding to the other thread in a
spinlock loop.
M ./includes/rts/SpinLock.h +2
M ./includes/stg/SMP.h +18
View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20090929130722-12142-2e9040529c1cb4bbb6754c55ac64270430d87f90.gz
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