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Chapter 8: Making Software Performance Measurements
Duration Performance Measurements
From Address
101E
File main(module)."/users/guest/demo/debug_env/hp64749/main.c"
Symbolic Reference at main.interrupt_sim
To Address
10A8
File main(module)."/users/guest/demo/debug_env/hp64749/main.c"
Symbolic Reference at interrupt_sim+8A
Number of intervals
Maximum Time 342343.680 us
Minimum Time 52.320 us
Avg Time
36987.751 us
Statistical summary - for
Stdv 76924.84
95% Confidence 8.07% Error tolerance
Graph of relative percents
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
Two sets of information are given in the duration measurement report: module
duration and module usage.
The first set is the "module usage" measurement. Module usage measurements
show how much time is spent outside the module of interest; they indicate how
often the module is used. The information shown in the first part of the duration
report above shows that the average amount of time spent outside the interrupt_sim
function is about 55.7 milliseconds.
The second set of information in the duration measurement report is the "module
duration" measurement. The module duration report shows that the amount of time
it takes for the interrupt_sim function to execute varies from 52.3 microseconds to
342.3 milliseconds. The average amount of time it takes for the interrupt_sim
module to execute is roughly 37 milliseconds.
254
2550
10 traces
0.00%
14.82%
********
5.06%
***
0.00%
24.82%
*************
20.27%
**********
10.08%
*****
0.00%
9.88%
*****
5.02%
***
7.57%
****
2.47%
*
0.00%
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