Profiler Implementation Example (original) (raw)

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A profiler can accumulate the total amount of data sent by the MPI_SEND function, along with the total elapsed time spent in the function as the following example shows:

Example

static int totalBytes = 0; static double totalTime = 0.0;

int MPI_Send(const void* buffer, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm) { double tstart = MPI_Wtime(); /* Pass on all arguments */ int size; int result = PMPI_Send(buffer,count,datatype,dest,tag,comm);

totalTime += MPI_Wtime() - tstart; /* and time */

MPI_Type_size(datatype, &size); /* Compute size / totalBytes += countsize;

return result;
}

Up: Profiling Interface Next: MPI Library Implementation Example Previous: Miscellaneous Control of Profiling

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