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2025-12-09 - 02:42
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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
Characteristics of the 50 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
3328844995854,3cyclictest3312405-21kworker/u8:0+flush-179:008:15:171
3328848995753,3cyclictest3531149-21kworker/u8:2+flush-179:010:25:152
3328844995754,2cyclictest3593876-21kworker/u8:3+events_unbound11:35:091
3328844995753,3cyclictest3417086-21kworker/u8:0+flush-179:008:40:131
3328854995652,3cyclictest3333395-21kworker/u8:4+events_unbound07:40:203
3328848995652,3cyclictest3402600-21kworker/u8:5+events_unbound08:40:102
3328844995653,2cyclictest3478066-21kworker/u8:1+events_unbound10:13:401
3328854995553,2cyclictest3380897-21kworker/u8:2+flush-179:008:05:333
3328854995551,3cyclictest3531149-21kworker/u8:2+flush-179:010:26:553
3328854995551,3cyclictest3478066-21kworker/u8:1+events_unbound09:40:413
3328844995552,2cyclictest3401121-21kworker/u8:3+events_unbound08:30:251
3328844995552,2cyclictest3401121-21kworker/u8:3+events_unbound08:25:351
3328844995551,3cyclictest3660907-21kworker/u8:3+flush-179:012:36:251
3328854995451,2cyclictest3333395-21kworker/u8:4+flush-179:008:10:263
3328844995451,2cyclictest3531149-21kworker/u8:2+flush-179:010:40:001
3328844995451,2cyclictest3531149-21kworker/u8:2+flush-179:010:39:591
3328854995349,3cyclictest3345280-21latency_hist07:25:013
3328854995250,2cyclictest3589229-21kworker/u8:1+flush-179:011:20:383
3328854995249,2cyclictest3417086-21kworker/u8:0+events_unbound08:35:303
3328854995249,2cyclictest3281213-21kworker/u8:2+flush-179:007:15:083
3328844995249,3cyclictest3578162-21kworker/u8:0+flush-179:011:10:391
3328844995244,3cyclictest3593876-21kworker/u8:3+events_unbound11:40:071
3328840995245,5cyclictest3500966-21/usr/share/muni09:55:020
3328854995148,2cyclictest3599004-21kworker/u8:1+flush-179:011:55:363
3328854995148,2cyclictest3556028-21kworker/u8:1+flush-179:010:45:333
3328848995147,3cyclictest3402600-21kworker/u8:5+events_unbound08:25:182
3328844995148,2cyclictest3609979-21kworker/u8:2+flush-179:011:50:311
3328844995148,2cyclictest3417086-21kworker/u8:0+flush-179:008:50:081
3328844995148,2cyclictest3402600-21kworker/u8:5+events_unbound09:00:441
3328840995146,3cyclictest3402600-21kworker/u8:5+flush-179:009:15:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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