/* iterate for all virtual machines */
for (s4u::VirtualMachine* const& ws_vm : VirtualMachineImpl::allVms_) {
surf::Cpu* cpu = ws_vm->pimpl_cpu;
/* iterate for all virtual machines */
for (s4u::VirtualMachine* const& ws_vm : VirtualMachineImpl::allVms_) {
surf::Cpu* cpu = ws_vm->pimpl_cpu;