[CIG-SEISMO] SPECFEM2D adjoint calculation problem/bug(?)

[Philip Knaute]

Hello all,

just to close this thread. Thanks to Dimitri the problem seems to be
resolved now, as far as I can tell.

Best regards,
Philip

2012/7/4 Dimitri Komatitsch <komatitsch at lma.cnrs-mrs.fr>:
>
> Dear Philip, dear all,
>
> Thank you very much for this bug report. Most users run the 2D code without
> MPI and thus the MPI part is not fully tested for adjoint runs (we use it a
> lot for forward problems here at our lab, but most of the time for adjoint
> runs so far we have run in serial mode).
>
> Could you please send us a tar file of your input files? (the DATA directory
> + the external mesh (if you use an external mesher))
> This way we will have a look.
>
> (if it is a bug, it should be easy to fix).
>
> Thank you,
> Best regards,
>
> Dimitri.
>
>
>
> On 07/04/2012 05:25 PM, Philip Knaute wrote:
>>
>> Dear Specfem2D users and developers,
>>
>> Yesterday I ran into a problem which, sadly, I wasn’t able to solve by
>> myself.
>>
>> I was trying to create sensitivity Kernels for more than one receiver
>> ( adjoint source ) with MPI enabled.
>> The result I got was very surprising, so I tried to run it again on
>> only one processor and the result looked much more reasonable then.
>>
>> Did anyone run into the same problem before and maybe found a
>> solution? Is it possible that there is a bug in the communication
>> between the processors? (something similar seems to happen with the
>> ‘DATA/STATIONS’ file output)
>>
>> I have been trying to spot the mistake/bug yesterday and today, but
>> without success. Any help would be greatly appreciated.
>>
>> Best regards,
>> Philip
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>
>
> --
> Dimitri Komatitsch - komatitsch aT lma.cnrs-mrs.fr
> CNRS Research Director (DR CNRS), Laboratory of Mechanics and Acoustics,
> UPR 7051, Marseille, France    http://komatitsch.free.fr