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2025-12-20 - 15:53
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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 rackbslot1.osadl.org (updated Sat Dec 20, 2025 12:44:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2120412216192,14sleep30-21swapper/307:06:453
2122872207184,13sleep00-21swapper/007:09:510
2122372198173,14sleep10-21swapper/107:09:111
2120222189165,14sleep20-21swapper/207:06:322
212486991100,107cyclictest250062-21chrome07:45:033
212478996459,3cyclictest499131-21snmp_areswitch.11:45:021
212481996359,3cyclictest326910-31munin-html08:55:362
212481996359,3cyclictest323453-21kworker/u8:2+flush-179:009:35:002
212478996257,4cyclictest498762-21latency_hist11:45:001
212486995913,44cyclictest247557-21chrome08:45:013
5043662560,1chrt504358-21snmp_areswitch.11:50:013
212478995551,3cyclictest217109-21kworker/u8:0+flush-179:007:40:181
212472995550,3cyclictest529242-21munin-limits12:10:330
212481995448,4cyclictest488775-21/usr/share/muni11:35:162
212481995350,2cyclictest323453-21kworker/u8:2+flush-179:009:05:102
212481995247,4cyclictest301602-21kworker/u8:5+flush-179:008:35:162
212472995249,2cyclictest323453-21kworker/u8:2+flush-179:009:10:360
212472995248,3cyclictest323453-21kworker/u8:2+flush-179:009:04:060
212472995248,3cyclictest323453-21kworker/u8:2+flush-179:009:04:050
212481995147,3cyclictest508998-21kworker/u8:0+events_unbound12:20:002
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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