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2026-01-02 - 21:13
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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 50 highest latencies:
System rack9slot2.osadl.org (updated Fri Jan 02, 2026 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
214192355277,43sleep30-21swapper/33
213292306271,24sleep00-21swapper/00
213052274206,55sleep10-21swapper/11
2174899262258,2cyclictest0-21swapper/22
2174499258251,4cyclictest11530-21ntp_states1
215912257180,43sleep20-21swapper/22
2175399153149,2cyclictest0-21swapper/33
21740999994,3cyclictest634-21snmpd0
276402620,1sleep30-21swapper/33
257342480,1sleep30-21swapper/33
240112450,1sleep20-21swapper/22
146722370,2sleep30-21swapper/33
2175399309,18cyclictest0-21swapper/33
2175399309,18cyclictest0-21swapper/33
2175399309,18cyclictest0-21swapper/33
2175399298,18cyclictest0-21swapper/33
2175399288,17cyclictest0-21swapper/33
219412270,2sleep30-21swapper/33
2175399277,17cyclictest0-21swapper/33
6832260,2sleep00-21swapper/00
2175399266,17cyclictest0-21swapper/33
21753992613,12cyclictest35-21ksoftirqd/33
2175399245,17cyclictest5151-21sendmail-mta3
2175399245,17cyclictest2358-21sendmail-mta3
2175399245,16cyclictest0-21swapper/33
2175399241,3cyclictest351ksoftirqd/33
21753992412,3cyclictest35-21ksoftirqd/33
21748992417,4cyclictest20219-21dump-pmu-power2
304852230,2sleep20-21swapper/22
2175399234,17cyclictest4085-21sendmail-mta3
2175399234,17cyclictest30709-21sendmail-mta3
2175399234,17cyclictest20462-21sendmail-mta3
2175399234,17cyclictest1012-21sendmail-mta3
2175399232,19cyclictest0-21swapper/33
2175399232,19cyclictest0-21swapper/33
2175399232,18cyclictest0-21swapper/33
2175399231,2cyclictest111rcu_preempt3
2175399229,11cyclictest18604-21wc3
2175399223,17cyclictest29373-21sendmail-mta3
2175399223,17cyclictest28319-21sendmail-mta3
2175399223,17cyclictest27450-21latency_hist3
2175399223,17cyclictest22926-21sendmail-mta3
2175399223,17cyclictest22148-21sendmail-mta3
2175399223,17cyclictest18149-21latency_hist3
2175399223,17cyclictest13326-21sendmail-mta3
2175399222,3cyclictest0-21swapper/33
2175399222,18cyclictest0-21swapper/33
2174899228,11cyclictest571-21gdbus2
21744992218,2cyclictest662-21runrttasks1
21744992218,2cyclictest662-21runrttasks1
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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