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2025-11-30 - 20:42
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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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackeslot6.osadl.org (updated Sun Nov 30, 2025 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31935879910091,7cyclictest3234568-21kworker/u8:1+flush-179:009:55:001
3193584999482,9cyclictest3198260-21latency_hist07:25:010
3193587998982,4cyclictest3277625-21kworker/u8:1+events_unbound11:30:251
3193584998879,7cyclictest3229555-21latency_hist09:00:010
3193584998681,4cyclictest3234568-21kworker/u8:1+flush-179:009:20:010
3193584998674,10cyclictest3277625-21kworker/u8:1+flush-179:012:40:000
3193587998476,6cyclictest3210494-21kworker/u8:0+flush-179:008:35:221
3193587998176,3cyclictest3223359-21kworker/u8:2+flush-179:008:45:251
3193587998175,4cyclictest3211573-21kworker/u8:3+flush-179:008:05:221
3193584998175,5cyclictest3193493-21kworker/u8:1+events_unbound08:00:240
3193584998175,4cyclictest3246030-21kworker/u8:0+flush-179:010:00:000
3193587998074,4cyclictest3193493-21kworker/u8:1+flush-179:008:00:001
3193587998073,5cyclictest3240789-21kworker/u8:0+flush-179:009:40:001
3193584998074,5cyclictest3277625-21kworker/u8:1+flush-179:012:10:250
3193587997975,3cyclictest3237615-21kworker/u8:3+flush-179:009:35:011
3193587997974,4cyclictest3277625-21kworker/u8:1+flush-179:012:35:251
3193587997972,5cyclictest3234568-21kworker/u8:1+events_unbound09:20:221
3193587997868,6cyclictest3193493-21kworker/u8:1+events_unbound07:35:011
3193584997872,4cyclictest3210494-21kworker/u8:0+flush-179:008:15:240
3193587997569,4cyclictest3193493-21kworker/u8:1+flush-179:007:30:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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