HP 64780A, Руководство пользователя

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If a module is entered at the normal point, and then exited by a point other than the
defined exit point, the entry point will be ignored. It will be judged the same as
any other unused prefetch, and no time-duration measurement will be made. Its
time will be included in the measure of time spent outside the procedure or
function.
If a module is exited from the normal point, and then reentered from some other
point, the exit will also be assumed to be an unused prefetch of the exit state.
Note that if you are making duration measurements on a function that is recursive,
or one that has multiple entry and/or exit points, you may wind up with invalid
information.
This section describes how to:
•
Set up the trace command for duration measurements.
•
Initialize duration performance measurements.
•
Interpret duration measurement reports.
To set up the trace command for duration
measurements
1 Specify a trace display depth of 512.
2 Trace after and store only function start and end addresses.
For duration measurements, the trace command must be set up to store only the
entry and exit points of the module of interest. Since the trigger state is always
stored, you should trigger on the entry or exit points. For example:
trace after symbol_entry or symbol_exit only
symbol_entry
or symbol_exit counting time <RETURN>
Chapter 8: Making Software Performance Measurements
Duration Performance Measurements
247