MPI Programming.

Calculate sum from $0$ to a specific number from arguments. A structure is given. Implement the

sum reduction part.

#include "mpi.h$"$

#include

#include

int main$($ int argc, char $*$argv$[])$

$\{$

int errs $=0$;

int rank, size;

MPI$\_$Init$($ &argc, &argv $)$;

MPI$\_$Comm$\_$rank$($ MPI$\_$COMM$\_$WORLD $,$ &rank $)$;

MPI$\_$Comm$\_$size$($ MPI$\_$COMM$\_$WORLD $,$ &size $)$;

$//$ Implement me

MPI$\_$Finalize$()$;

return errs;

$\}$

Experiments:

$2$

Changing the number of threads, measure its speedups on different amount of calculation, $2000,$

$20000,$ and $200000.$

You can execute your program with the following command.

$ mpicc $-$np $<$# of threads$>$ a$.$out

Report the following:

$1)$ The speedup results from the experiments.

$2)$ An explanation of how you parallelize the code, including any unexpected issues encountered

or strategies attempted.

$3)$ A copy of your code, any scripts used, and hardware information.