CPU_LOAD get total physical CPU load

Returns the "recent cpu usage" for the whole system.

This value is a double greater than 0. If the system recent cpu usage is not available, the backend returns a negative or NaN value.

function L = cpu_load(backend)
arguments
  backend (1,:) string = ["java", "python", "sys"]
end

fun = hbackend(backend, "cpu_load");

L = fun();


end