Broadcom-VMware
2V0-622 · Question #211
2V0-622 Question #211: Real Exam Question with Answer & Explanation
The correct answer is A: The active power policy is set to Low Power.. High %CSTP in esxtop combined with a Low Power active policy and BIOS-level Sleep States (C-states) indicates CPU throttling and wake latency are co-stopping vCPUs and degrading VM performance.
Question
Refer to the Exhibit. An administrator is troubleshooting intermittent poor performance of virtual machines in a vSphere 6.x cluster. Investigating esxtop data shows that the only statistic that stands out is %CSTP as depicted in Exhibit 1: The administrator proceeds to switch to the Power Management screen and observes the data depicted in Exhibit 2: Based on the information in the exhibits, which two configurations are probable causes of the poor performance? (Choose two.)
Exhibits
Options
- AThe active power policy is set to Low Power.
- BThe host has active Sleep States configured in the BIOS.
- CThe active power policy is set to High Performance.
- DThe host has active Power States configured in the BIOS.
Explanation
High %CSTP in esxtop combined with a Low Power active policy and BIOS-level Sleep States (C-states) indicates CPU throttling and wake latency are co-stopping vCPUs and degrading VM performance.
Common mistakes.
- C. High Performance policy disables power savings and keeps CPUs at maximum frequency, which would reduce co-stop wait times rather than cause them.
- D. Power States (P-states/frequency scaling) are the mechanism already covered by the vSphere power policy; the relevant BIOS feature causing halt-based latency is C-states (Sleep States), not a generic 'Power States' option.
Concept tested. CPU co-stop (%CSTP) caused by power management C-states
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