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2025-11-28 - 11:08
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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 Thu Nov 27, 2025 12:45:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38238152212183,19sleep30-21swapper/307:08:033
38238042209185,14sleep20-21swapper/207:07:542
38238832205181,14sleep00-21swapper/007:08:560
38238382202172,20sleep10-21swapper/107:08:211
38241339910245,55cyclictest3861557-21chrome07:45:023
41473142980,3sleep2361ktimers/212:20:102
3824130999590,3cyclictest3986424-21snmp_wlanswitch09:45:022
3824127999489,3cyclictest3125721-21chrome09:45:020
382412999714,66cyclictest4110046-21chrome11:45:021
3824129996456,6cyclictest3125725-21ThreadPoolForeg10:20:001
3824127996460,3cyclictest3996958-21kworker/u8:1+flush-179:010:10:420
3824129996155,4cyclictest3933790-21kworker/u8:4+flush-179:009:05:091
3824129996055,3cyclictest3908063-21kworker/u8:2+flush-179:008:45:401
3824129996010,50cyclictest4136462-21kworker/u8:3+efi_rts_wq12:39:581
41515472590,1sleep00-21swapper/012:25:010
3824129995753,3cyclictest4001338-21kworker/u8:5+events_unbound10:00:321
3824129995753,3cyclictest3808654-21kworker/u8:2+flush-179:008:05:351
40077762550,1chrt4007772-21snmp_wanpowerct10:05:040
3824127995550,4cyclictest247560-21ThreadPoolForeg09:37:590
3824127995550,4cyclictest247560-21ThreadPoolForeg09:37:590
3824130995430,23cyclictest4094371-21kworker/u8:0+flush-179:012:10:392
3824133995233,18cyclictest3559364-1kworker/3:0H+kblockd09:58:593
3824129995247,3cyclictest3839388-21kworker/u8:1+flush-179:007:55:411
3824133995146,4cyclictest4094371-21kworker/u8:0+flush-179:011:55:233
3824129995147,3cyclictest3933790-21kworker/u8:4+events_unbound09:10:341
3824129995145,5cyclictest4022850-21kworker/u8:1+flush-179:010:45:331
3824129995145,5cyclictest4022850-21kworker/u8:1+flush-179:010:45:331
3824127995145,4cyclictest247515-21ThreadPoolForeg11:35:180
3824133995046,3cyclictest4001338-21kworker/u8:5+flush-179:010:25:293
3824133995044,4cyclictest4115196-21latency_hist11:50:003
3824130995047,2cyclictest3861117-21kworker/u8:0+flush-179:008:30:352
3824129995046,3cyclictest4012418-21kworker/u8:2+events_unbound10:55:271
3824133994943,4cyclictest3933790-21kworker/u8:4+flush-179:009:25:143
3824130994943,5cyclictest4105001-21/usr/share/muni11:40:192
3824129994944,3cyclictest4032760-21kworker/u8:3+flush-179:010:50:351
3824127994943,4cyclictest4110072-21ThreadPoolForeg11:45:070
3824127994941,7cyclictest3792947-21kworker/u8:0+flush-179:007:35:100
3824133994842,4cyclictest3959820-21updatedb.plocat09:18:063
3824133994834,13cyclictest3559364-1kworker/3:0H+kblockd10:17:543
382413099485,42cyclictest4136462-21kworker/u8:3+efi_rts_wq12:39:572
3824130994843,4cyclictest3808654-21kworker/u8:2+flush-179:007:35:172
3824129994844,3cyclictest3920244-21kworker/u8:3+flush-179:008:55:241
3824129994843,3cyclictest4012418-21kworker/u8:2+flush-179:011:00:341
3824129994841,5cyclictest4099883-21/usr/share/muni11:35:091
3824127994844,3cyclictest4104460-21kworker/u8:4+flush-179:011:40:120
3824130994742,4cyclictest3903420-21/usr/share/muni08:25:142
3824130994742,4cyclictest3867141-21/usr/share/muni07:50:032
3824129994743,3cyclictest4109624-21kworker/u8:2+flush-179:012:10:191
382412799471,45cyclictest247557-21chrome08:30:350
3824133994643,2cyclictest4156280-21kworker/u8:4+flush-179:012:35:283
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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