Cyclictest is part of the rt-tests package and is included in ost-devel images.
For more information about the flags, see Cyclictest.
Test Methodology
The following command is executed for each core:
$ cat /dev/zero > /dev/null
This causes 100% CPU utilization. Then cyclictest is invoked using the following command, to run for 24h:
$ sudo ./cyclictest -n -Sp80 -l86400000000 -i1000 -h1000 -q > histogramm.log
-l specifies the test duration in µs; 24h*60min/h*60min/s*1000ms/s*1000us/ms = 86'400'000'000us.
Results
| platform | latency (µs) | ||||
|---|---|---|---|---|---|
| min | max | mode | avg | median | |
| cb20 | 11 | 52 | 15 | 15 | 15 |
| cx2020 | 2 | 10 | 3 | 3 | 3 |
Histogram
