[erlang-questions] Message passing via shared memory
Wed Feb 4 17:26:40 CET 2009
> From: Andras Georgy Bekes <>
>> I'm pretty interested in this method, because while memory copying is
>> OK for MPP or clustered environments, its is much slower than memory
>> sharing on SMP environments if you are deailing with certain amount
>> of data.
> Memory sharing is faster only if the number of processors (cores) is
> small. As the number of cores increases, the environment is getting
> similar to a cluster.
Could you explain this? I always had the impression, that because there aren't any variables in erlang, cache issues won't hurt the speed (though it would make the GC more tricky). What am I missing? What would cause the slowdown?
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