6.5.1

Table 7‑4. CPU Panel Statistics
Line Description
PCPU USED(%) A PCPU refers to a physical hardware execution context. It can be a physical CPU core if the
hyperthreading is unavailable or disabled, or a logical CPU (LCPU or SMT thread) if the
hyperthreading is enabled.
PCPU USED(%) displays the following percentages:
n
percentage of CPU usage per PCPU
n
percentage of CPU usage averaged over all PCPUs
CPU Usage (%USED) is the percentage of PCPU nominal frequency that was used since the last
screen update. It equals the total sum of %USED for Worlds that ran on this PCPU.
N If a PCPU is running at frequency that is higher than its nominal (rated) frequency, then
PCPU USED(%) can be greater than 100%.
If a PCPU and its partner are busy when hyperthreading is enabled, each PCPU account for half of
the CPU usage.
PCPU UTIL(%) A PCPU refers to a physical hardware execution context. It can be a physical CPU core if the
hyperthreading is unavailable or disabled, or a logical CPU (LCPU or SMT thread) if the
hyperthreading is enabled.
PCPU UTIL(%) represents the percentage of real time that the PCPU was not idle (raw PCPU
utilization). It displays the percentage CPU utilization per PCPU, and the percentage CPU
utilization averaged over all PCPUs.
N PCPU UTIL(%) might dier from PCPU USED(%) due to power management technologies
or hyperthreading.
ID Resource pool ID or virtual machine ID of the resource pool or virtual machine of the world that is
running. Alternatively, the world ID of the world that is running.
GID Resource pool ID of the resource pool or virtual machine of the world that is running.
NAME Name of the resource pool or virtual machine of the world that is running, or name of the world
that is running.
NWLD Number of members in the resource pool or virtual machine of the world that is running. If a
Group is expanded using the interactive command e, then NWLD for all the resulting worlds is 1.
%STATE TIMES Set of CPU statistics made up of the following percentages. For a world, the percentages are a
percentage of one physical CPU core.
%USED Percentage of physical CPU core cycles used by the resource pool, virtual machine, or world.
%USED might depend on the frequency with which the CPU core is running. When running with
lower CPU core frequency, %USED can be smaller than %RUN. On CPUs which support the turbo
mode, CPU frequency can also be higher than the nominal (rated) frequency, and %USED can be
larger than %RUN.
%USED = %RUN + %SYS - %OVRLP
%SYS Percentage of time spent in the ESXi VMkernel on behalf of the resource pool, virtual machine, or
world to process interrupts and to perform other system activities. This time is part of the time
used to calculate %USED.
%USED = %RUN + %SYS - %OVRLP
%WAIT Percentage of time the resource pool, virtual machine, or world spent in the blocked or busy wait
state. This percentage includes the percentage of time the resource pool, virtual machine, or world
was idle.
100% = %RUN + %RDY + %CSTP + %WAIT
%VMWAIT The total percentage of time the Resource Pool/World spent in a blocked state waiting for events.
%IDLE Percentage of time the resource pool, virtual machine, or world was idle. Subtract this percentage
from %WAIT to see the percentage of time the resource pool, virtual machine, or world was
waiting for some event. The dierence, %WAIT- %IDLE, of the VCPU worlds can be used to
estimate guest I/O wait time. To nd the VCPU worlds, use the single-key command e to expand a
virtual machine and search for the world NAME starting with "vcpu". (The VCPU worlds might
wait for other events in addition to I/O events, so this measurement is only an estimate.)
Chapter 7 Performance Monitoring Utilities: resxtop and esxtop
VMware, Inc. 133