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2025-12-09 - 07:10
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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 Mon Dec 08, 2025 12:45:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33283292212169,33sleep20-21swapper/207:08:342
33282622202179,13sleep10-21swapper/107:07:411
33281042196173,13sleep00-21swapper/007:06:120
33283832193166,17sleep30-21swapper/307:09:163
3328854999338,52cyclictest3489926-21chrome09:45:013
3328844998534,12cyclictest3489951-21snmp_areswitch.09:45:011
332884499731,71cyclictest3478066-21kworker/u8:1+efi_rts_wq09:38:531
3328844997166,3cyclictest3525411-21kworker/u8:0+events_unbound10:30:381
3328844996764,2cyclictest3333395-21kworker/u8:4+flush-179:008:20:271
3328854996450,10cyclictest3402600-21kworker/u8:5+flush-179:009:20:293
3328848996357,4cyclictest3531149-21kworker/u8:2+flush-179:010:45:412
3328854996257,3cyclictest3354687-21kworker/u8:1+events_unbound08:30:353
3328844996259,2cyclictest3640377-21kworker/u8:2+events_unbound12:15:361
3328854996157,3cyclictest3645956-21kworker/u8:0+flush-179:012:30:393
3328854996157,3cyclictest3525411-21kworker/u8:0+flush-179:011:00:403
3328854996055,3cyclictest3458449-21kworker/u8:1+events_unbound09:15:013
3328844996056,3cyclictest3478066-21kworker/u8:1+flush-179:009:55:271
3328844996054,5cyclictest3125689-21ThreadPoolForeg07:40:251
332884899584,11cyclictest3489932-21snmp_wanswitch.09:45:012
3328844995855,2cyclictest3417086-21kworker/u8:0+flush-179:008:35:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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