Generator of multiplying factors for benchmarking scatterv/gatherv

A standalone tool for generating factors which can be used as input file for benchmarking scatterv/gatherv in Collective benchmark. The factors are normalized so that the average factor is 1. Arguments can be:

• -r for random factors
• -c for factors based on a small GSL matrix multiplication at every process

Example:

 mpirun -n 2 generate_factors -c > factors