double clock_end = simgrid::s4u::Engine::get_clock();
XBT_INFO("%s:%s to %s:%s => %g sec", payload->tx_host->get_cname(), payload->tx_actor_name, host_name, actor_name,
double clock_end = simgrid::s4u::Engine::get_clock();
XBT_INFO("%s:%s to %s:%s => %g sec", payload->tx_host->get_cname(), payload->tx_actor_name, host_name, actor_name,