A preemptive foreground/background system has three interrupt-driven cycles,

described by Table 7.4

(with context switch time ignored):

(a) Draw an execution time line for this system.

(b) What is the CPU utilization?

(c) Considering the context switch time to be 1 millisecond, redraw the execution time line for this system.

(d) What is the system time-loading (CPU utilization) factor with the context switch time included?

Transcribed Image Text:

Table 7.4 Table for time-loading Exercise 7.14 Task Cycle Actual Execution Priority Time (ms) (1 is highest, 10 is lowest) 10 ms 20 ms 40 ms Background 4505 10 132|