Re: [deal.II] Re: Problems in solving two PDE systems using MPI+Thread parallel computing

2017-05-20 Thread Bruno Turcksin 
 Jack,

2017-05-19 22:06 GMT-04:00 Jack :
> I should update my OpenMPI to the latest version and such problem will be
> avoided and I do not need to change my code for initialization of MPI and
> TBB myself?
Unfortunately, you wil need to initialize MPI yourself or you can
change this line
https://github.com/dealii/dealii/blob/master/source/base/mpi.cc#L321
in
dealii/source/base/mpi.cc (replace MPI_THREAD_SERIALIZED by
MPI_THREAD_MULTIPLE) and recompile deal. Here is some explanation on
the different options available
https://www.open-mpi.org/doc/current/man3/MPI_Init_thread.3.php If you
still have the problem then you can try to update you version of
OpenMPI.

Best,

Bruno

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[deal.II] Re: "operator+=" error in the assemble_system()

2017-05-20 Thread hanks0227 
Dear Jean-Paul,


> Firstly (and just so that we're all clear on what you're trying to 
> implement), was I correct that your comment that I linked contained the 
> description of the integral that you are trying to compute?
>  
>

Yes it is. that is something I have to do.


> No, this is not true. Here is this function's documentation 
> .
>  
> This is different from what is returned 
> 
>  
> if you use a FEValuesExtractor::Vector 
> 
> .
>  
>
>> sol_grad is also vector
>>
>
> Yes, since your original solution field is a scalar I think that this is 
> correct. 
>
> Is it now clear as to why you're seeing this error?
>
>
>
Thank you very much. Due to your help, I solved my problem.

Thank you again!!

Kyusik. 

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