* \param flops_amount Array (of size host_nb) of computation amount of hosts (in bytes)
* \param bytes_amount Array (of size host_nb * host_nb) representing the communication
* amount between each pair of hosts
* \param flops_amount Array (of size host_nb) of computation amount of hosts (in bytes)
* \param bytes_amount Array (of size host_nb * host_nb) representing the communication
* amount between each pair of hosts