Table of Contents
Advertisement
Chapter 8: Making Software Performance Measurements
Duration Performance Measurements
When no user defined time range file is specified, the following set of default time
ranges are used.
1 us 10 us
10.1 us 100 us
100.1 us 500 us
500.1 us 1 ms
1.001 ms 5 ms
5.001 ms 10 ms
10.1 ms 20 ms
20.1 ms 40 ms
40.1 ms 80 ms
80.1 ms 160 ms
160.1 ms 320 ms
320.1 ms 640 ms
640.1 ms 1.2 s
Restoring the Current Measurement
The performance_measurement_initialize restore command allows you to
restore old performance measurement data from the perf.out file in the current
directory.
If you have not exited and reentered emulation, you can add traces to a
performance measurement simply by entering another
performance_measurement_run command. However, if you exit and reenter the
emulation system, you must enter the performance_measurement _initialize
restore command before you can add traces to a performance measurement. When
you restore a performance measurement, make sure your current trace command is
identical to the command used with the restored measurement.
The restore option checks the emulator software version and will only work if the
perf.out files you are restoring were made with the same software version as is
presently running in the emulator. If you ran tests using a former software version
and saved perf.out files, then updated your software to a new version number, you
will not be able to restore old perf.out measurement files.
Examples
To initialize the duration measurement:
performance_measurement_initialize duration <RETURN>
250
Advertisement
Table of Contents
