HP Matrix Operating Environment Software - Manual (Page 149)

C Units and terminology
The units and terms listed in the following table are used within Capacity Advisor. For an
expanded list of terminology used within Capacity Advisor and VSE Management Software, see
the “Glossary”at the end of this guide.
Table C-1 Units and Terminology
Meaning Unit or Key Word
Active data-processing unit within a processor; a processor (CPU) can contain one or more
cores. Multiple cores on the same physical unit provides the capability for multiprocessing
within the same CPU. core
Central Processing Unit. The computer chip that executes most programming instructions; can
be composed of one or more cores. CPU
The number or percentage of CPU cores in use.
Each Capacity Advisor data sample represents a 5–minute average of CPU cores used over
that period of time. These measurements are calculated by tracking CPU usage within the
kernel at each polling interval in the following manner:
Table C-2 Data collection for CPU utilization by platform
Collected from Calculation Platform
pstat() Total used CPU ticks during the interval
divided by the total available CPU ticks
during the interval HP-UX
/proc/stat Total used CPU ticks during the interval
divided by the total available CPU ticks
during the interval Linux
CPU PDH counter Percent busy since the start of the interval Microsoft Windows
HP Virtual Machine
Management Pack
(VMM) Imported as is Proliant VM Host and
VMs
CPU database CPU
tick counters Total used CPU ticks during the interval
divided by total available CPU ticks during
the interval. OpenVMS
When monitoring user-defined workloads, CPU and memory utilization for short-lived,
"user-owned" processes may be missed. Short-lived processes are those lasting less than 5
minutes that span less than two sample periods. Any "missed" utilization is attributed to
system processes.
CPU utilization
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