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Subject: Re: [OMPI users] Problem with MPI_Comm_spawn_multiple & MPI_Info_free
From: Ralph Castain (rhc_at_[hidden])
Date: 2009-03-09 07:42:09


Could you tell us what version of Open MPI you are using? It would
help us to provide you with advice.

Thanks
Ralph

On Mar 9, 2009, at 2:18 AM, Tee Wen Kai wrote:

> Hi,
>
> I have a program that allow user to enter their choice of operation.
> For example, when the user enter '4', the program will enter a
> function which will spawn some other programs stored in the same
> directory. When the user enter '5', the program will enter another
> function to request all spawned processes to exit. Therefore,
> initially only one process which act as the controller is spawned.
>
> My MPI_Info_create and MPI_Comm_spawn_multiple are called in a
> function. Everything is working fine except when I tried to free the
> MPI_Info in the function by calling MPI_Info_free, I have
> segmentation fault error. The second problem is when i do the
> spawning once and exit the controller program with MPI_Finalize, the
> program exited normally. But when spawning is done more than once
> and exit the controller program with MPI_Finalize, there is
> segmentation fault. I also realize that when the spawed processes
> exit, the 'orted' process is still running. Thus, when multiple
> MPI_Comm_spawn_multiple are called, there will be multiple 'orted'
> processes.
>
> Thank you and hope someone has a solution to my problem.
>
> Regards,
> Wenkai
>
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