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From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2007-10-31 12:21:50


Again, I'm not a CM guy :-), but in general, I would think: yes, you
set MPI_ERROR when it is appropriate. I.e., when you know that the
request has been successful or it has failed.

On Oct 31, 2007, at 9:18 AM, Sajjad Tabib wrote:

>
> Hi Jeff,
>
> Now that you mention it, I believe you are right. In fact, I did
> not know that I needed to set the req_status.MPI_ERROR in my MTL. I
> looked at the mx mtl and realized that req_status.MPI_ERROR is
> getting set in their progress function. So, in general, when do you
> set the req_status.MPI_ERROR? After a send/recv has completed
> successfully?
>
> Thank You,
>
> Sajjad Tabib
>
>
>
> Jeff Squyres <jsquyres_at_[hidden]>
> Sent by: devel-bounces_at_[hidden]
> 10/31/07 07:29 AM
> Please respond to
> Open MPI Developers <devel_at_[hidden]>
>
>
> To
> Open MPI Developers <devel_at_[hidden]>
> cc
> Subject
> Re: [OMPI devel] Question regarding
> MCA_PML_CM_SEND_REQUEST_INIT_COMMON
>
>
>
>
>
> I haven't done any work in the cm pml so I can't definitively answer
> your question, but wouldn't you set req_status.MPI_ERROR in your MTL
> depending on the result of the request?
>
>
> On Oct 29, 2007, at 9:20 AM, Sajjad Tabib wrote:
>
> >
> > Hi,
> >
> > I was issuing an MPI_Bcast in a sample program and was hitting an
> > unknown error; at least that was what MPI was telling me. I traced
> > through the code to find my error and came upon
> > MCA_PML_CM_REQUEST_INIT_COMMON macro function in pml_cm_sendreq.h.
> > I looked at the function and noticed that in this function the
> > elements of req_status were getting initialized; however,
> > req_status.MPI_ERROR was not. I thought that maybe MPI_ERROR must
> > also require initialization because if the value of MPI_ERROR was
> > some arbitrary value not equal to MPI_SUCCESS then my program will
> > definitely die. Unless, MPI_ERROR is propragating from upper layers
> > to signify an error, but I wasn't sure. Anyway, I assumed that
> > MPI_ERROR was not propagating from upper layers, so then I set
> > req_status.MPI_ERROR to MPI_SUCCUSS and reran my test program. My
> > program worked. Now, having gotten my program to work, I thought I
> > should run this by you to make sure that MPI_ERROR was not
> > propagating from upper layers. Is it ok that I did a:
> > "(req_send)->req_base.req_ompi.req_status.MPI_ERROR = MPI_SUCCESS;"
> > in MCA_PML_CM_REQUEST_INIT_COMMON?
> >
> > Thank You,
> >
> > Sajjad Tabib
> > _______________________________________________
> > devel mailing list
> > devel_at_[hidden]
> > http://www.open-mpi.org/mailman/listinfo.cgi/devel
>
>
> --
> Jeff Squyres
> Cisco Systems
>
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>
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-- 
Jeff Squyres
Cisco Systems