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2025-12-04 - 00:22
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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 Wed Dec 03, 2025 12:45:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1328322239189,39sleep10-21swapper/107:09:131
1328852185161,15sleep20-21swapper/207:09:542
1328512183149,25sleep00-21swapper/007:09:290
1328642182158,14sleep30-21swapper/307:09:403
133112997062,6cyclictest247561-21ThreadPoolForeg09:10:303
133109996561,3cyclictest397521-21kworker/u8:3+events_unbound11:45:381
133112996458,5cyclictest284225-21/usr/share/muni09:35:113
133112996458,4cyclictest397750-21latency_hist11:25:013
133112996246,14cyclictest361103-21kworker/u8:1+flush-179:010:55:293
133109996247,2cyclictest3125648-13Chrome_IOThread07:45:021
133106996257,3cyclictest203134-21kworker/u8:3+flush-179:008:20:250
13311299615,55cyclictest299208-21kworker/u8:5+efi_rts_wq10:08:583
133109996055,3cyclictest3125688-21Chrome_ChildIOT07:40:311
133110995955,3cyclictest238187-21kworker/u8:3+events_unbound09:00:132
133109995946,12cyclictest444374-21kworker/u8:2+events_unbound12:35:181
133112995854,3cyclictest138053-21kworker/u8:1+flush-179:008:40:293
133112995844,12cyclictest170117-21/usr/share/muni07:45:013
133109995753,3cyclictest86333-21kworker/u8:2+flush-179:007:30:271
133109995652,3cyclictest397521-21kworker/u8:3+flush-179:011:35:291
133109995652,3cyclictest174721-21kworker/u8:4+flush-179:008:55:281
133110995550,4cyclictest3125724-21ThreadPoolForeg09:55:012
133110995531,23cyclictest174721-21kworker/u8:4+flush-179:008:05:282
133109995539,13cyclictest222069-21kworker/u8:3+flush-179:008:35:041
133112995448,4cyclictest226519-21ntpq08:35:303
13310999544,48cyclictest232883-21snmp_wanpowerct08:45:021
133106995450,3cyclictest299208-21kworker/u8:5+flush-179:010:00:010
133112995346,6cyclictest347443-21apt-get10:35:133
133112995246,4cyclictest465254-31munin-html12:26:253
133110995248,3cyclictest387696-21/usr/share/muni11:15:162
133109995249,2cyclictest335511-21kworker/u8:3+events_unbound11:05:091
133109995249,2cyclictest263340-21kworker/u8:1+events_unbound09:40:041
133109995249,2cyclictest263340-21kworker/u8:1+events_unbound09:40:031
133109995245,3cyclictest257987-21kworker/u8:0+events_unbound09:25:001
133109995244,2cyclictest373780-21kworker/u8:0+flush-179:012:30:231
133109995242,9cyclictest293970-21kworker/u8:4+flush-179:010:15:161
133106995248,3cyclictest373780-21kworker/u8:0+events_unbound12:15:200
133106995247,3cyclictest373780-21kworker/u8:0+flush-179:012:10:120
133109995147,3cyclictest305084-21/usr/share/muni09:55:011
133106995146,4cyclictest335997-21/usr/share/muni10:25:100
13310699511,49cyclictest389017-21apache_volume11:15:150
133110995047,3cyclictest373780-21kworker/u8:0+flush-179:011:20:302
13311099500,29cyclictest247545-13VizCompositorTh07:16:032
133109995047,2cyclictest429368-21kworker/u8:1+events_unbound12:25:371
133109995047,2cyclictest373780-21kworker/u8:0+events_unbound12:04:011
133109995047,2cyclictest190989-21kworker/u8:0+flush-179:008:20:011
133109995046,3cyclictest257987-21kworker/u8:0+flush-179:009:35:291
133109995046,3cyclictest257987-21kworker/u8:0+events_unbound09:25:351
133109995045,4cyclictest293970-21kworker/u8:4+events_unbound10:10:201
133109995038,12cyclictest361103-21kworker/u8:1+flush-179:010:59:151
133109995038,11cyclictest63011-21kworker/u8:3+events_unbound07:50:101
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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