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2026-09-18 - 07:53
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackfslot7.osadl.org (updated Fri Sep 18, 2026 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
166855199139110,29cyclictest0-21swapper/323:35:153
1668551999315,59cyclictest1844513-21ls00:29:593
1668551999012,39cyclictest1801495-21/usr/sbin/munin23:10:143
1668551997819,39cyclictest1752949-21/usr/sbin/munin21:40:223
1668551997517,39cyclictest1699190-21awk20:05:143
1668551997416,39cyclictest1838833-21http00:20:003
1668551997214,39cyclictest1698049-21sed20:00:243
1668551997214,19cyclictest0-21swapper/320:40:243
1668551997212,59cyclictest1831589-21cut00:05:163
1668551997111,59cyclictest1788256-21ntpq22:45:203
1668551997032,38cyclictest0-21swapper/323:04:583
1668551997031,20cyclictest1835064-21ntp_states00:10:243
1668551997012,39cyclictest1690555-21munin-run19:50:023
1668551996931,38cyclictest0-21swapper/322:41:263
1668551996931,19cyclictest1730122-21expr21:00:143
166854999580,39cyclictest34-21ksoftirqd/120:00:161
1668551995618,19cyclictest1841375-21awk00:20:253
1668551995517,19cyclictest1680851-21memory19:30:183
1668551995515,20cyclictest1736554-21/usr/sbin/munin21:10:223
1668551995515,20cyclictest1736554-21/usr/sbin/munin21:10:223
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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