[petsc-users] Segmentation error when calling PetscBarrier

[TAY wee-beng]

Hi Matt,

In that case, what would be a good or accurate way to debug the MPI 
code? I'm trying to determine where the fault lies.

Thank you

Yours sincerely,

TAY wee-beng

On 5/1/2016 9:31 AM, Matthew Knepley wrote:
> On Mon, Jan 4, 2016 at 7:28 PM, TAY wee-beng <zonexo at gmail.com 
> <mailto:zonexo at gmail.com>> wrote:
>
>     Hi,
>
>     I am trying to debug my CFD Fortran MPI code. I tried to add:
>
>     call PetscBarrier(PETSC_NULL_OBJECT); if (myid==0) print *, "xx"
>
>     to do a rough check on where the error is. xx is a different
>     number for each line.
>
>     I found that whenever I add this line, the code aborts with
>     segmentation error.
>
>     I am using the Intel compiler. Is there any error with my usage?
>
>
> I don't think this makes sense since it will try to pull a 
> communicator out of the NULL_OBJECT.
>
>    Matt
>
>
>     -- 
>     Thank you
>
>     Yours sincerely,
>
>     TAY wee-beng
>
>
>
>
> -- 
> What most experimenters take for granted before they begin their 
> experiments is infinitely more interesting than any results to which 
> their experiments lead.
> -- Norbert Wiener

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