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2026-08-04 - 04:18
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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
Characteristics of the 20 highest latencies:
System rackdslot2.osadl.org (updated Tue Aug 04, 2026 00:45:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
245602240174,22sleep30-21swapper/319:05:463
246172231170,49sleep10-21swapper/119:06:291
248152210183,18sleep20-21swapper/219:08:592
245622206172,22sleep00-21swapper/019:05:470
2489926448,8sleep00-21swapper/019:10:010
139291510,36ptp4l0-21swapper/319:10:013
139291510,1ptp4l401ktimersoftd/321:58:473
25192995044,3cyclictest217-21systemd-journal23:10:002
25192995044,3cyclictest217-21systemd-journal23:10:002
2519199481,15cyclictest5824-21apt-get23:00:131
2519199450,16cyclictest5050-21diskstats21:50:161
139291450,1ptp4l401ktimersoftd/322:57:563
25193994438,4cyclictest31366-21systemctl19:20:263
25192994337,3cyclictest33-21ksoftirqd/223:59:592
25192994237,3cyclictest33-21ksoftirqd/220:40:012
139291420,0ptp4l401ktimersoftd/322:44:193
139291420,0ptp4l401ktimersoftd/320:13:113
25192994136,3cyclictest33-21ksoftirqd/222:45:002
2519199411,8cyclictest5027-21ssh20:40:261
2519199411,7cyclictest15518-21meminfo19:55:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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