To Set Up The Trace Command For Activity Measurements - HP 64751 User Manual

Chapter 8: Making Software Performance Measurements
Absolute count - state
Absolute count - time - Us 2221.20
This section describes how to:
•
Set up the trace command for activity measurements.
•
Initialize activity performance measurements.
•
Interpret activity measurement reports.
To set up the trace command for activity
measurements
1 Specify a trace display depth of 512.
2 Trace after any state, store all states, and count time.
Before you initialize and run performance measurements, the current trace
command (in other words, the last trace command entered) must be properly set up.
In general, you want to give the SPMT as many trace states as possible to
post-process, so you should increase the trace depth to the maximum number, as
shown in the following command.
If you wish to measure activity as a percentage of all activity, the current trace
command should be the default (in other words, trace <RETURN>). The default
trace command triggers on any state, and all captured states are stored. It is
important that time be counted by the analyzer; otherwise, the SPMT measurements
will not be correct. Also, since states are stored "after" the trigger state, the
maximum number of captured states appears in each trace list.
You can qualify trace commands any way you like to obtain specific information.
However, when you qualify the states that get stored in the trace memory, your
SPMT results will be biased by your qualifications; the percentages shown will be
of only those states stored in the trace list.
Activity Performance Measurements
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