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CpuTimeonSingleCpuMultiTaskingSystem.svg
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Elapsed real time for program P1
Program P1 started
P1 preempted for P2
P2 preempted for P3
P1 brought back on CPU
P1 requested I/O. Put in wait. P2 on CPU
After I/O for P1 done, P1 brought on CPU
Program P1 completed
CPU
Time
P2
P1
P3
P1
P2
P1
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