If the OS polls at 1kHz, then when the process reads the state from the OS, the OS will give the process data that is at most 1ms old. If the OS polls at 125Hz,

If the OS polls at 1kHz, then when the process reads the state from the OS, the OS will give the process data that is at most 1ms old. If the OS polls at 125Hz, the data that the process reads from the OS can be up to 8ms old.