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2026-07-05 - 00:36
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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 rackdslot4.osadl.org (updated Sat Jul 04, 2026 12:45:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2819023090,52sleep20-21swapper/207:05:262
283642219178,31sleep10-21swapper/107:05:591
284012205170,23sleep30-21swapper/307:06:293
284352203169,22sleep00-21swapper/007:06:530
1027821570,2sleep02897499cyclictest09:45:230
3133321450,7sleep12897599cyclictest08:19:591
497021430,6sleep02897499cyclictest07:25:190
2867929166,13sleep10-21swapper/107:10:011
2897799595,11cyclictest18741-21sshd07:54:513
302132550,2sleep30-21swapper/310:25:263
2897799556,9cyclictest24909-21irqstats09:10:193
318842540,1sleep20-21swapper/209:25:162
2897799546,9cyclictest26214-21latency_hist08:10:003
2897799527,8cyclictest1319-21snmpd11:08:033
2897799522,14cyclictest0-21swapper/307:55:223
96282500,4sleep00-21swapper/010:50:140
2897799506,7cyclictest1503-21grep10:35:153
2897799505,15cyclictest8295-21timerandwakeup10:45:273
211472490,2sleep20-21swapper/211:10:272
2897799487,15cyclictest2315-21gnome-shell11:00:583
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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