The CPU Power panel displays CPU Power utilization statistics.
On the CPU Power panel, statistics are arranged per physical CPU. A physical CPU is a physical hardware execution context. It is the physical CPU core when hyper-threading is unavailable or disabled, or a logical CPU (LCPU or SMT thread) when hyper-threading is enabled.
|Power Usage||Current total power usage (in Watts).|
|Power Cap||Total power cap (in Watts).|
|PSTATE MHZ||Clock frequency per state.|
|%USED||Percentage of physical CPU nominal frequency used since the last screen update. It is the same as PCPU USED(%) shown in the CPU Screen.|
|%UTIL||Raw physical CPU utilization is the percentage of time that physical CPU was not idle. It is the same as PCPU UTIL(%) shown in the CPU Screen.|
|%Cx||Percentage of time the physical CPU spent in C-State 'x'.|
|%Px||Percentage of time the physical CPU spent in P-State 'x'. On systems with Processor Clocking Control, P-states are not directly visible to ESXi. The esxtop shows the percentage of time spent at full speed under the heading 'P0' and the percentage of time spent at any lower speed under 'P1'.|
|%Tx||Percentage of time the physical CPU spent in T-State 'x'.|
aperf and mperf are two hardware registers used to keep track of the actual frequency and nominal frequency of the processor. Displays the real-time aperf to mperf ratio in the last esxtop update period.
%A/MPERF *nominal frequency of the processor = current frequency of the processor