mpi_small_examples

How to build and exec.

make
make run

or

make run

1_helloworld

Simple hello world

2_axpy

Simple axpy (y = alpha * x + y);

3_dot

Inner product. It uses MPI_Allreduce.

4_matvec

Simple, parallel matvec. It uses MPI_Allgather. However, it needs temp. global vector. I will impl. improved version 5_matvec_commT

5_matvec_commT

not implemented...