[mpich2-dev] question about communication optimization on shared memory

[Shigang Li]

Dear Sir or Madam,

I have some questions about communication optimizations on shared memory in
state-of-art mpich2.

1) When configure mpich2, does it support shared memory optimization in
default? If so, can it select the communication pattern automatically
according to hardware architecture? For example in a SMPs cluster, using
shared memory optimization within a node and using socket cross nodes?

2) What about collective communication on shared memory? Is it implemented
on top of the optimized point to point communication or use other
mechanisms?

Best Regards,
Shigang.
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