simgrid::s4u::Host* sender = comm->src_proc->host;
simgrid::s4u::Host* receiver = comm->dst_proc->host;
comm->surf_comm = surf_network_model->communicate(sender, receiver, comm->task_size, comm->rate);
simgrid::s4u::Host* sender = comm->src_proc->host;
simgrid::s4u::Host* receiver = comm->dst_proc->host;
comm->surf_comm = surf_network_model->communicate(sender, receiver, comm->task_size, comm->rate);