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2026-03-24 - 21:46
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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 Tue Mar 24, 2026 12:45:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
138591204170,23phc2sys0-21swapper/307:09:333
221582202168,23sleep10-21swapper/107:06:381
221272202167,23sleep20-21swapper/207:06:132
223222198166,21sleep00-21swapper/007:08:450
138491810,1ptp4l391rcuc/309:10:203
138491800,1ptp4l391rcuc/311:40:193
2272299679,10cyclictest12729-21echo09:00:023
22722996510,17cyclictest6653-21date09:50:243
2272299649,16cyclictest0-21swapper/310:47:323
210012620,2sleep30-21swapper/311:25:183
2272299617,15cyclictest24758-21/usr/sbin/munin10:30:253
22722995610,9cyclictest2315-21gnome-shell11:47:593
121192560,2sleep10-21swapper/112:10:251
22722995510,9cyclictest2302-21latency_hist09:45:003
2272299539,18cyclictest12456-21/usr/sbin/munin10:05:173
2272299538,16cyclictest1319-21snmpd10:37:303
2272299528,16cyclictest22663-21grep09:20:133
2272299519,14cyclictest2315-21gnome-shell08:19:583
2272299517,16cyclictest16758-21cat09:05:253
2272299517,16cyclictest16758-21cat09:05:253
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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