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2026-06-22 - 21:40
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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 10 highest latencies:
System rackfslot7.osadl.org (updated Mon Jun 22, 2026 12:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4046160999315,59cyclictest4105967-21threads08:55:230
4046160999214,59cyclictest25613-21/usr/sbin/munin12:25:110
4046160999113,59cyclictest4113077-21diskstats09:10:150
4046160997336,18cyclictest171ktimers/007:10:190
4046160997335,19cyclictest4088707-21ntpq08:25:210
4046160997335,19cyclictest4088707-21ntpq08:25:210
4046160997133,38cyclictest4189095-21munin-run11:30:010
4046160997011,40cyclictest4097189-21collect208:40:190
4046160997011,39cyclictest4183833-21dpkg11:20:090
4046160996830,38cyclictest0-21swapper/010:36:490
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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