Advanced POWER Virtualization on IBM System p5 - Previous ...

Note: The variable capacity weight is zero in this example, as the partition
mode is capped, as can be seen from line five of the output.
Note: The output format of the lparstat command varies, depending on the
partition configuration (SMT on/off, shared or dedicated processors). This
makes its parsing with sed, awk, cut, perl, and the like somewhat problematic.
The mpstat command
The mpstat command collects and displays performance statistics for all logical
CPUs in a partition. The interpretation of many of the figures displayed by this
command requires an understanding of <strong>POWER</strong> Hypervisor and the <strong>POWER</strong>5
processor. The mpstat command flags are shown in Table 5-1.
Table 5-1 mpstat command flags
Command Flags Function
mpstat none Displays the default statistics; a subset of the -a flag.
-a Displays all 29 logical processor statistics.
-i Displays the interrupt statistics; a subset of the -a flag.
-d Displays the processor affinity and migration statistics for
AIX 5L threads and dispatching statistics for logical
processors. A subset of the -a flag.
-s Shows the SMT usage statistics when SMT is enabled. This
data is not shown with the -a flag.
When the mpstat command is invoked, it displays two sections of statistics. The
first section displays the system configuration, which is displayed when the
command starts and whenever there is a change in the system configuration.
The second section displays the utilization statistics, which will be displayed in
intervals and at any time the values of these metrics are deltas from a pervious
interval.
An optional -w flag switches on wide screen output.
340 <strong>Advanced</strong> <strong>POWER</strong> <strong>Virtualization</strong> on IBM System p5