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2026-04-23 - 05:13
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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 10 highest latencies:
System rackdslot1.osadl.org (updated Thu Apr 23, 2026 00:45:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
993921720,6sleep11367499cyclictest23:40:171
274421310,7sleep31367799cyclictest21:05:133
21942740,4sleep12197-21latency_hist22:15:001
134491680,24ptp4l26469-21ls20:45:203
1367499673,62cyclictest12384-21kworker/1:120:36:281
134491670,4ptp4l0-21swapper/021:35:200
1367499651,61cyclictest30836-21diskstats00:25:151
13674996510,19cyclictest28763-21tail19:40:241
75172640,5sleep09-21ksoftirqd/023:35:140
1367499641,60cyclictest3029-21iostat_ios22:15:181
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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