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2026-06-28 - 17:58
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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 Sun Jun 28, 2026 12:45:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139591232169,52phc2sys0-21swapper/307:08:143
169682220175,33sleep20-21swapper/207:06:522
170502207174,22sleep10-21swapper/107:07:561
169292205172,22sleep00-21swapper/007:06:220
2730321790,6sleep21751299cyclictest08:35:302
139291750,2ptp4l391rcuc/307:40:193
28752630,3sleep22882-21irqrtprio10:00:182
1751399634,9cyclictest2199-21latency_hist12:15:003
227932620,1sleep10-21swapper/111:50:091
1751399626,16cyclictest27116-21sed10:50:183
1751399617,9cyclictest438-21gdbus07:35:243
1751399613,12cyclictest31652-21unixbench_multi12:05:283
1751399613,11cyclictest12008-21sed09:10:283
1751399603,11cyclictest7719-21cron09:04:593
1751399592,16cyclictest0-21swapper/307:15:263
1751399592,13cyclictest23787-21uname10:44:593
1751399592,11cyclictest13958-21apt-key10:25:013
1751399592,10cyclictest0-21swapper/311:35:253
172912590,2sleep10-21swapper/111:35:251
1751399585,18cyclictest11388-21tune2fs11:25:163
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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