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@cisco.com>
Sent by: devel-bounces@open-mpi.org

10/31/07 07:29 AM
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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@open-mpi.org
> http://www.open-mpi.org/mailman/listinfo.cgi/devel


--
Jeff Squyres
Cisco Systems

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