VM performance is severely affected.
When reviewing esxtop, %LAT_C is consistently high, with no or minimal %RDY and %CSTP
%LAT_C is cpu latency. It denotes the percentage of time the resource pool or world was ready to run but was not scheduled to run because of CPU resource contention.
%LAT_C can be viewed in esxtop by viewing Summary stats. (type 'f', 'i' and [return] in esxtop)
%RDY is ready wait. It denotes thepercentage of time the virtual machine or world was ready to run, but was not provided CPU resources.
This value also indicates that there the host has more vCPUs to PCPUs. Ideal value should be less than 10%.
%CSTP is co-stop. It denotes cpu contention due to waiting to be co-scheduled. A high %CSTP might indicate that a VM has more vCPUs than required. Ideal value should be less than 5%.
VMware vSphere ESXi
High CPU latency can be caused by cpu contention, cpu ready, frequency scaling (power managemen/turbo)
Although the host and the BIOS are configured correctly with the correct power management settings, for eg. high performance, validate frequency scaling using esxtop.
To resolve the issue,