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2025-12-20 - 17:33
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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 Sat Dec 20, 2025 12:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1873485991150,115cyclictest0-21swapper/007:23:300
1873487997431,42cyclictest0-21swapper/207:20:182
1873489996728,18cyclictest2039458-21irqstats12:00:174
187348999635,39cyclictest1955017-21cut09:30:234
1873489996218,41cyclictest2017841-21chrt11:21:174
187348999621,20cyclictest413-21systemd-journal09:25:014
1873489996120,19cyclictest1913407-21/usr/sbin/munin08:20:174
187348999602,19cyclictest0-21swapper/411:05:414
187349399580,58cyclictest0-21swapper/707:23:307
1873489995820,18cyclictest6050ktimers/408:25:174
1873489995816,20cyclictest1994133-21if_eno410:40:184
1873489995815,40cyclictest2014303-21gcc11:15:214
187348999580,39cyclictest1938324-21/usr/sbin/munin09:00:234
187348999580,39cyclictest1900222-21if_eno607:55:174
187348799580,19cyclictest0-21swapper/210:40:172
1873489995637,19cyclictest0-21swapper/408:47:154
1873489995618,19cyclictest1951518-21awk09:25:174
1873489995614,0cyclictest0-21swapper/412:25:214
187348999560,56cyclictest0-21swapper/411:29:014
187348999560,56cyclictest0-21swapper/409:17:454
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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