Optimizations for mutable structures?
simonmar at microsoft.com
Thu Dec 8 11:36:26 EST 2005
On 08 December 2005 11:52, Claus Reinke wrote:
> is every MVar access is a synchronisation point (in terms of memory
> update propagation between threads, not just in terms of thread
Yes, it is. On a multiprocessor every MVar operation performs a full
memory barrier internally.
Incedentally, GHC hasn't actually supported multiprocessors until very
recently, and it's still only in CVS and very experimental.
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