Calculate PI with MPI

We use the trapezoid method to calculate the following integral:

$$ \pi =\int_0^1\frac{4}{(1+x^2)} $$

which is the integral of 4/(1+x^2) for x from 0 to 1.

Calculate PI in 2 ways with MPI:

1. MPI_Reduce
2. MPI_SendRecv

To run the code:

Automatically:

• Execute the script run.sh

Manually:

    $ cmake . & make
    $ mpirun -n 4 hello_word
    $ mpirun -n 4 calculate_pi

Configuration

In calculate_pi.cpp, you can choose the way to calculate PI with Macros:

• USE_MPI_REDUCE
• USE_MPI_SEND_RECV

Author

NoeWang at Shanghai Jiao Tong University