Sample MPI code to sum numbers + Mid sem answer sheets graded.

[Akshay]

I have shared sample code for summing numbers using MPI in the Dropbox folder. The file is "MPI_Sum.cpp". Please go through it w.r.t. the following:

>How to randomly generate input data

>How to scatter input data across processors

>Where to include sequential algorithm and how to measure its runtime

>When to start and stop measuring runtime of parallel code. 

>Where/how to calculate speedup and efficiency. 

Looking at the submissions for the Prog Assignment 1, most of them fail w.r.t. above points. Though, this time I have considered those programs acceptable that run in some sort of way, it will not be the case for the next prog assignment. So, please go through the shared code. I will also discuss this in tomorrow's class. 

Also, mid sem answer sheets have been graded -- they will be shown in tomorrow's class. 

Regards,

Akshay