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2026-04-03 - 17:05
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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 Apr 03, 2026 12:46:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3117075991090,108cyclictest0-21swapper/108:45:101
3117079999273,19cyclictest0-21swapper/511:05:145
311707999900,89cyclictest0-21swapper/508:45:105
3117078999032,39cyclictest3204532-21basename09:50:004
3117078998245,18cyclictest236199-21snmpd11:28:164
311707999790,20cyclictest0-21swapper/508:25:155
3117078997719,39cyclictest3125985-21cat07:25:124
311708199760,0cyclictest0-21swapper/708:35:117
3117077997675,1cyclictest511ktimers/312:05:153
3117078997435,20cyclictest3161057-21kworker/u32:5+events_unbound10:15:124
3117078997435,20cyclictest3161057-21kworker/u32:5+events_unbound10:15:124
3117078997113,39cyclictest3117412-21/usr/sbin/munin07:10:194
3117078996932,18cyclictest601ktimers/408:38:544
3117078996930,38cyclictest3184436-21ld09:10:204
3117078996628,19cyclictest3296327-21cut12:35:124
311708199635,19cyclictest0-21swapper/708:50:157
311707899635,39cyclictest3231491-21chrt10:36:104
311707799591,19cyclictest0-21swapper/312:25:163
311707899580,39cyclictest3276174-21taskset11:56:224
311707899580,39cyclictest3137855-21/usr/sbin/munin07:45:214
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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