This program performs a multiplication of a 100 x 100 matrix by a vector using the ``bank queue'' paradigm.
First the master process broadcasts
the content of the vector to all processes. Then the first
pool_size - 1 rows of the matrix are sent to the workers.
Each worker multiplies its row of the matrix by the vector and
returns the result to the master. Upon having received the result
the master sends the next row of the matrix to the worker until
the whole matrix has already been handed out. In the latter case,
the master sends a termination signal to the worker.
All communication operations are logged by the master on standard output. The workers log the communication operations on special log files which they open in /tmp.