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2025-12-11 - 23:20
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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 rackdslot3.osadl.org (updated Thu Dec 11, 2025 12:45:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
137191206172,22phc2sys0-21swapper/307:05:033
41042198165,22sleep00-21swapper/007:09:410
40562198164,22sleep20-21swapper/207:09:032
18872197163,23sleep10-21swapper/107:05:041
3149021790,6sleep0443099cyclictest08:05:170
606021640,4sleep0443099cyclictest09:25:230
1369911000,0ptp4l391rcuc/312:05:283
244222600,2sleep30-21swapper/307:50:193
244222600,2sleep30-21swapper/307:50:193
443399595,16cyclictest223-21systemd-journal12:38:513
136991540,1ptp4l391rcuc/307:25:253
443399524,16cyclictest9441-21/usr/sbin/munin09:35:273
443399513,16cyclictest4464-21apt-get07:10:123
443399513,15cyclictest16544-21/usr/sbin/munin07:35:173
136991440,0ptp4l401ktimersoftd/308:42:483
4431994333,7cyclictest25-21ksoftirqd/111:40:011
136991430,1ptp4l0-21swapper/309:52:453
136991430,0ptp4l401ktimersoftd/312:21:193
136991430,0ptp4l401ktimersoftd/309:56:263
136991430,0ptp4l401ktimersoftd/309:17:503
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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