GPA Manual

Description of GPA Reports

Guardian Performance Analyzer (GPA) Manual—135081

3-8

Processor Load Balance and Performance Charts

This section of the report consists of two charts: the Processor Load Balance Chart and

the Processor Performance Chart.

Processor Load Balance Chart

This chart (Example 3-6) shows graphically how the system load is distributed among

the node’s processors. Each CPU’s percentage busy is shown in the area between the two

horizontal scale lines. The plus (+) signs indicate graphically the proportion of the CPU

busy time spent doing interrupt processing.

The tuning window is the amount that the percentage busy time for any processor can

deviate, either up or down, from the average value for the node without being considered

out of balance. The tuning window is depicted graphically on the Processor Load

Balance Chart. A processor is within the tuning window when its CPU busy level is

between the series of w’s at the top and bottom of the chart.

The chart also indicates any abnormal condition for a CPU with regard to memory

shortage or excessive transient processes. These conditions are indicated by flags

(characters following the CPU busy level) whose meanings are explained at the bottom

of the figure.

(3) SYSTEM: The SYSTEM class consists of processes that are part of the

OSIMAGE or have an execution priority greater than 199.

(4) SUBSYS: The SUBSYSTEM class consists of processes that are part of the

system image subvolume, $SYSTEM.SYSnn.*, and are not TRANSIENT.

(5) PATHWAY: The PATHWAY class consists of processes with the filename

PATHMON or PATHTCP2, and are not TRANSIENT.

(6) SERVER: The SERVER class consists of processes that receive messages and

are not part of the SYSTEM, SUBSYSTEM, PATHWAY, or TRANSIENT

classes.

(7) TRANSIENT: The TRANSIENT class consists of all processes that do not

exist for at least 90% of the measurement period.

(8) OTHER: The OTHER class consists of any processes that are not members of

another class.

(9) TOTAL: The total percentage busy for the system can be compared with 100%

for each of the CPUs in the system. In this case, there are four CPUs, so the total

available is 400%.