GPA Manual

Running GPA
Guardian Performance Analyzer (GPA) Manual—135081
2-6
The GPA Procedure
If the program executes the command successfully, continue the procedure with Step 4.
If you get the following error message:
3219 MEASURE subsystem not currently running
do Step 3c, below, before Step 4. (You must have super group access to perform Step
3c.)
c. Start the Measure subsubsystem. Enter:
+ START MEASSUBSYS
Delete the measfile started in Step 3b. Enter:
+ DELETE MEASUREMENT measfile
Reenter the START MEASUREMENT command from Step 3b.
4. When Measure has finished its run, determine the period for the GPA analysis as
follows:
a. Use MEASCOM to plot the CPU busy time for the measurement period. At the
TACL prompt, enter:
4> MEASCOM
When the MEASCOM prompt appears, enter the following commands line by
line:
+ ADD MEASUREMENT file-name
+ LIST CPU *
+ ADD PLOT CPU-BUSY-TIME
+ LIST PLOT
The plot that Measure displays shows the busy time for each CPU on the node at
each of the specified measurement intervals over the entire measurement period.
(For a detailed discussion of Measure plots, see the Measure User’s Guide.)
b. From the Measure plot, determine the busiest one- to three-hour period for the
system. This is the period for which you should run the GPA analysis.
5. If you plan to run GPA on a system other than the one being analyzed, copy the
active MEASFH file to the Measure data subvolume. You can then move the
MEASFH file along with the Measure data files to the system on which you will be
running GPA.
To find the active Measure files, enter:
5> STATUS $XM00
Note. Be sure to perform this deletion, otherwise GPA will not be able to read the
Measure data.
Note. For a valid analysis, the GPA analysis period should be at least one hour long.