On Wed, 29 Aug 2012, 蔡园武 wrote:
I found the definition of Parallel::barrier:
void libMesh::Parallel::barrier ( const Communicator &
comm =
Communicator_World ) [inline]
and the explanation:
Pause execution until all processors reach a certain point.
But I don't know what should be 'a certain point'?
The barrier() call. No processor gets to continue past the barrier
until all other processors have reached the barrier.
What can I pass as variable 'Communicator_World'?
That's a C++ argument-with-a-default-value. You don't pass anything
to it unless you want to use a non-default value. Just use
Parallel::barrier();
and you're done.
---
Roy
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