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2025-11-22 - 01:32
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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 Fri Nov 21, 2025 12:44:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32809192207183,14sleep20-21swapper/207:08:222
32807482199169,20sleep30-21swapper/307:06:143
32808812197173,14sleep10-21swapper/107:07:511
32808572182158,14sleep00-21swapper/007:07:350
3281233997773,2cyclictest3504360-21/usr/share/muni10:45:011
3281237997470,3cyclictest3529271-21kworker/u8:5+flush-179:011:30:102
3281231996762,3cyclictest3493425-21kworker/u8:1+flush-179:010:40:360
3281233996357,4cyclictest3318255-21ThreadPoolSingl07:45:021
3281237996157,3cyclictest3520364-21kworker/u8:2+flush-179:011:10:202
3281233996154,5cyclictest3566198-21chrome11:45:041
3281231996156,4cyclictest3570888-21kworker/u8:0+flush-179:011:50:160
3281237995954,4cyclictest3334006-21/usr/share/muni08:00:022
3281233995947,3cyclictest3503877-21gpgv10:45:001
3281237995753,3cyclictest3601515-21kworker/u8:3+flush-179:012:30:302
3281233995750,5cyclictest3125724-21ThreadPoolForeg10:50:101
3281231995755,1cyclictest0-21swapper/009:40:350
3281231995651,4cyclictest3509861-21/usr/share/muni10:50:150
3281237995551,3cyclictest3555245-21kworker/u8:4+flush-179:011:45:292
3281237995551,3cyclictest3313674-21kworker/u8:2+events_unbound10:35:312
3281233995548,5cyclictest3441766-21/usr/share/muni09:45:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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