[mpich-discuss] Semantics of MPI_Cancel

[Dries Kimpe]

What if the MPI_Irecv completed before the call to MPI_Cancel was made?

  Dries

* Matthieu Dorier <matthieu.dorier at irisa.fr> [2013-08-07 22:25:58]:

> Hi, 


> Suppose process 0 does the following 
> MPI_Irecv(...req) 
> MPI_Cancel(req) 
> MPI_Recv 


> and process 1 does 
> MPI_Send 
> MPI_Send 


> Does process 0 receives the data from the first or the second MPI_Send? 
> (I'd tend to say the second, but I'd like a confirmation). 


> Thanks! 


> Matthieu Dorier 
> PhD student at ENS Cachan Brittany and IRISA 
> http://people.irisa.fr/Matthieu.Dorier 

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