An administrator is troubleshooting a CPU issue for a virtual machine. The following is seen in esxtop: - CPU0 is at 100% usage - The remaining logical CPUs are close to 0% - %RDY value is…

The correct answer is C. The virtual machine has CPU affinity configured. By setting a CPU affinity on the virtual machine you are limiting the available CPUs on which the virtual machine can run. It does not dedicate that CPU to that virtual machine and therefore does not restrict the CPU scheduler from using that CPU for other virtual machines.

Section 7 – Administer and Analyze vSphere 6.x Performance

Question

An administrator is troubleshooting a CPU issue for a virtual machine. The following is seen in esxtop:

CPU0 is at 100% usage
The remaining logical CPUs are close to 0%
%RDY value is consistently above 10%

What is likely the cause of the CPU issue?

Options

AThe virtual machine has a CPU limit configured.
BThe virtual machine's guest operating system is configured for SMP.
CThe virtual machine has CPU affinity configured.
DThe virtual machine is configured with a CPU reservation.

How the community answered

(23 responses)

A
13% (3)
B
4% (1)
C
65% (15)
D
17% (4)

Explanation

By setting a CPU affinity on the virtual machine you are limiting the available CPUs on which the virtual machine can run. It does not dedicate that CPU to that virtual machine and therefore does not restrict the CPU scheduler from using that CPU for other virtual machines.

Topics

#CPU performance#esxtop#CPU affinity#single-threaded application

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