code: def _set_cpu_throttling(self):
          
  
          if not self.is_running():
              return
  
          try:
              if sys.platform.startswith("win") and hasattr(sys, "frozen"):
                  cpulimit_exec = os.path.join(os.path.dirname(os.path.abspath(sys.executable)), "cpulimit", "cpulimit.exe")
              else:
                  cpulimit_exec = "cpulimit"
              subprocess.Popen([cpulimit_exec, "--lazy", "--pid={}".format(self._process.pid), "--limit={}".format(self._cpu_throttling)], cwd=self.working_dir)
              log.info("CPU throttled to {}%".format(self._cpu_throttling))
          except FileNotFoundError:
              raise QemuError("cpulimit could not be found, please install it or deactivate CPU throttling")
          except (OSError, subprocess.SubprocessError) as e:
              raise QemuError("Could not throttle CPU: {}".format(e))
docs: Limits the CPU usage for current QEMU process.