Thanks for your detailed explanation. I tried your method and my code
works right now!

2012/8/29 Roy Stogner <[email protected]>:
>
> 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



-- 
Cai Yuanwu  蔡园武
Dept. of Engineering Mechanics,
Dalian University of Technology,
Dalian 116024, China

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