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TAU_TRACE_SENDMSG(3) TAU Instrumentation API TAU_TRACE_SENDMSG(3)

NAME

TAU_TRACE_SENDMSG - Traces a receive operation

SYNOPSIS

C/C++:

TAU_TRACE_SENDMSG(int  tag, int source, int length);

Fortran:

TAU_TRACE_SENDMSG(integer tag, integer source, integer length);

DESCRIPTION

TAU_TRACE_SENDMSG traces an inter-process message communication when a tagged message is sent to a destination process.

NOTE: When TAU is configured to use MPI (-mpiinc=<dir> -mpilib=<dir>), the TAU_TRACE_SENDMSG and TAU_TRACE_SENDMSG macros are not required. The wrapper interposition library in

$(TAU_MPI_LIBS)

uses these macros internally for logging messages.

EXAMPLE

C/C++ : 

if (pid == 0) {
  TAU_TRACE_SENDMSG(currCol, sender, ncols * sizeof(T));
  MPI_Send(vctr2, ncols * sizeof(T), MPI_BYTE, sender, 
           currCol, MPI_COMM_WORLD);
} else {
  MPI_Recv(&ans, sizeof(T), MPI_BYTE, MPI_ANY_SOURCE, 
           MPI_ANY_TAG,MPI_COMM_WORLD, &stat);
  MPI_Get_count(&stat, MPI_BYTE, &recvcount);
  TAU_TRACE_RECVMSG(stat.MPI_TAG, stat.MPI_SOURCE, recvcount);
}

Fortran :

call TAU_TRACE_RECVMSG(tag, source, length)
call TAU_TRACE_SENDMSG(tag, destination, length)

SEE ALSO

TAU_TRACE_RECVMSG(3)
08/31/2005