double mig_sta = simgrid::s4u::Engine::get_clock();
sg_vm_migrate(vm, dst_pm);
double mig_end = simgrid::s4u::Engine::get_clock();
double mig_sta = simgrid::s4u::Engine::get_clock();
sg_vm_migrate(vm, dst_pm);
double mig_end = simgrid::s4u::Engine::get_clock();