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2026-04-10 - 01:34
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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 Apr 09, 2026 12:45:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139491230163,23phc2sys0-21swapper/307:06:563
59982211164,21sleep10-21swapper/107:08:211
60832203170,22sleep20-21swapper/207:09:282
57872202169,22sleep00-21swapper/007:05:360
1393911250,1ptp4l28916-21kworker/3:111:15:243
295622710,1sleep229563-21/usr/sbin/munin07:55:322
134491630,7getstats657799cyclictest12:06:483
121442600,2sleep10-21swapper/107:20:171
6577995419,4cyclictest41-21ksoftirqd/312:30:013
139391540,1ptp4l401ktimersoftd/312:34:393
6577995020,4cyclictest41-21ksoftirqd/309:10:193
6577994917,3cyclictest41-21ksoftirqd/310:25:243
6577994822,7cyclictest41-21ksoftirqd/308:39:173
6577994717,3cyclictest41-21ksoftirqd/311:40:003
6577994514,3cyclictest41-21ksoftirqd/311:00:193
6577994438,3cyclictest28873-21anacron09:03:463
6577994431,3cyclictest41-21ksoftirqd/308:05:273
6577994413,8cyclictest41-21ksoftirqd/307:45:263
6577994412,4cyclictest41-21ksoftirqd/307:40:163
6577994410,6cyclictest41-21ksoftirqd/308:45:243
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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