Computers and Technology, 04.08.2021 01:50 brid7931

Suppose that an automobile microcontroller has four priority levels for interrupts (level 1 being the highest). The units interrupting the controller include an impact sensor subsystem, which needs attention within 0.1 ms, along with four other subsystems as follows: Subsystem Interrupt rate Max service time(ms)
Fuel/ignition 500/sec 1 ms
Engine temperature 1/sec 100 ms
Dashboard display 800/sec 0.2 ms
Air conditioner 1/sec 100 ms

Use rate monotonic scheduling to assign a priority to each subsystem that guarantees the response time of 0.1 ms for the impact sensor and handles each of the other critical units before the next interrupt is produced.

a. Justify your priority assignments.
b. Does RMA guarantee schedulability?

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Suppose that an automobile microcontroller has four priority levels for interrupts (level 1 being th...

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