double end_time = simgrid::s4u::Engine::get_clock();
XBT_INFO("Actual result: Sending %d bytes from '%s' to '%s' takes %f seconds.", data_size,
simgrid::s4u::this_actor::get_host()->get_cname(), dest, end_time - start_time);
double end_time = simgrid::s4u::Engine::get_clock();
XBT_INFO("Actual result: Sending %d bytes from '%s' to '%s' takes %f seconds.", data_size,
simgrid::s4u::this_actor::get_host()->get_cname(), dest, end_time - start_time);