Wildcarding and Using the Status Handle

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(16) Wildcarding and Using the Status Handle

 MPI Wildcarding and Use of the Status
Handle

WildcardingReceiver can wildcard
To receive from any source
MPI_ANY_SOURCE
To receive with any tag
MPI_ANY_TAG
Actual source and tag are returned in the receiver's status
parameter 
Example:
MPI_Recv(buffer,count,MPI_INT,MPI_ANY_SOURCE,MPI_ANY_TAG,MPI_COMM_WORLD,status)

Using the Status Handle
Information from a receive is returned from MPI_Recv
in status handle

      Information

      C

      Fortran

      source

      status.MPI_SOURCE

      status(MPI_SOURCE)

      tag

      status.MPI_TAG

      status(MPI_TAG)

      count

      MPI_Get_count(status,datatype,&count)

      MPI_GET_COUNT(status,datatype,count,ierr)

message-passing-details2.src last modified Apr 25, 2007

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