In a multi-processor system, there are four processors numbered 0, 1, 2 and 3.

ARM EN0-001 Question Answer

In a multi-processor system, there are four processors numbered 0, 1, 2 and 3. The state of the processors is as follows:

CPU 0 and 1 are sleeping in low-power state following a WFI instruction. . CPU 2 is executing program code.

CPU 3 is sleeping in low-power state following a WFE instruction.

CPU 2 executes a SEV instruction. What is the effect on the system?

CPU 0: executing, CPU 1: executing, CPU 2: executing. CPU 3: executing

CPU 0: executing, CPU 1: executing. CPU 2: executing. CPU 3: sleeping

CPU 0: sleeping, CPU 1: sleeping. CPU 2: executing. CPU 3: executing

CPU 0: sleeping, CPU 1: sleeping. CPU 2: sleeping, CPU 3: executing

ARM EN0-001 Summary

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