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2026-04-11 - 20:26
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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 Sat Apr 11, 2026 12:45:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
126262206173,22sleep20-21swapper/207:06:542
107352206172,22sleep30-21swapper/307:05:033
127072201168,22sleep10-21swapper/107:07:581
127882197164,22sleep00-21swapper/007:09:010
1857121540,6sleep21316699cyclictest10:40:202
2168421210,3sleep11316599cyclictest07:25:221
57898920,71rtkit-daemon0-21swapper/007:10:000
139391690,2ptp4l401ktimersoftd/311:45:253
310312680,4sleep10-21swapper/112:15:141
139391650,1ptp4l18547-21apt-get09:35:113
289722600,5sleep328976-21latency_hist08:50:003
114442600,2sleep00-21swapper/010:25:210
120982580,3sleep11316599cyclictest09:20:191
219972560,2sleep00-21swapper/007:25:260
279122550,2sleep30-21swapper/311:00:223
190032530,2sleep30-21swapper/310:40:243
139391510,1ptp4l401ktimersoftd/309:42:593
139391490,1ptp4l401ktimersoftd/310:16:303
139391480,1ptp4l401ktimersoftd/311:12:503
139391440,0ptp4l401ktimersoftd/307:17:113
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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