A real-time system controls the processes at an automated pasta sauce bottling facility in West Chester, PA.The real-time system is a pre-emptive priority one and consists of four real-time processes and a background process. The process information is given in the table below:
Process
Function
Rate
Priority (1=highest)
(I) Alarm_processing
Respond to exceptional events such as conveyor jam, dispenser malfunction, etc.
NA -- aperiodic
1
(II) Process_control
issue process commands to automated equipment. Collect line data for display
5 times per second
2
(III)
Screen_update
Display
control and process information to operator console monoitor
33
times / second
3
(IV)
Background
Data
logging from process control information, system diagnostics
NA
NA
which
of the following would not make the
system rate-monotonic?

  • Changing
    the rate of process I (Alarm_processing) to 10 times per second and combining
    Processes II (Process_control) and III (Screen_update) to priority level 2 at a
    rate of 5 times per second
  • Changing
    the rate of process I (Alarm_processing) to 40 times per second and the rate of
    process II (Process_control) to 35 times per second.
  • Changing the priority of Process III
    (Screen_update) to level 1 and moving Process I (Alarm_processing) to the
    background.
  • Changing the rate of process I
    (Alarm_processing) to 50 times per second.
  • Combining processes I and III at priority
    level 1 and running at 33 times per second.
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