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2026-08-30 - 15:37
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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 Sun Aug 30, 2026 12:46:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
242682226163,51sleep10-21swapper/107:06:181
139491217152,22phc2sys0-21swapper/307:08:553
224292208164,33sleep20-21swapper/207:05:082
242402201168,22sleep00-21swapper/007:05:580
2485099580,17cyclictest0-21swapper/009:05:200
2485099545,10cyclictest5535-21timerwakeupswit08:40:270
2485099530,11cyclictest16474-21cat08:00:020
2485099510,17cyclictest12634-21systemctl08:55:240
2485099510,12cyclictest31628-21cpuspeed_turbos10:45:130
2485099510,10cyclictest17622-21irqrtprio10:15:180
2485099500,12cyclictest27704-21awk07:15:150
2485099500,12cyclictest27704-21awk07:15:150
2485099500,11cyclictest21045-21sed12:35:280
2485099500,10cyclictest27205-21irqrtprio08:20:190
2485099490,11cyclictest13914-21timerwakeupswit12:20:250
2485099480,12cyclictest27040-21timerandwakeup09:25:260
2485299476,6cyclictest33-21ksoftirqd/210:40:282
24852994710,4cyclictest33-21ksoftirqd/207:40:002
2485099470,15cyclictest13387-21latency_hist09:00:010
2485099470,14cyclictest29694-21apt-get07:20:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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