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2025-06-18 - 23:22
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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 20 highest latencies:
System rackbslot1.osadl.org (updated Wed Jun 18, 2025 12:44:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10708999912911287,2cyclictest1208623-21snmp_wlanpowerc09:25:021
10704492219190,19sleep30-21swapper/307:06:473
10704732217189,19sleep00-21swapper/007:07:050
10705582214186,19sleep20-21swapper/207:08:072
10703942213189,14sleep10-21swapper/107:06:061
126363521380,1sleep31263642-21idleruntime-cro10:20:003
1070899991040,2cyclictest1168342-21Chrome_ChildIOT08:45:021
1070899996562,1cyclictest1228562-21ThreadPoolForeg09:45:021
1070905996255,5cyclictest1112609-21/usr/share/muni07:50:123
1070902996157,3cyclictest1294057-21kworker/u8:1+flush-179:011:55:262
1070902996157,3cyclictest1294057-21kworker/u8:1+flush-179:011:55:262
11021522590,1chrt1102141-21snmp_ryswitch2.07:40:012
1070899995956,2cyclictest1309321-21kworker/u8:3+flush-179:011:20:081
1070899995954,3cyclictest1366076-21kworker/u8:3+flush-179:012:20:111
1070902995854,3cyclictest1310392-21/usr/share/muni11:05:162
1070902995651,3cyclictest1257911-31munin-html10:10:372
1070902995551,3cyclictest1268043-21kworker/u8:5+events_unbound11:01:572
1070905995446,6cyclictest1515559-21ThreadPoolForeg08:20:323
1070902995452,2cyclictest1060422-21kworker/u8:0+flush-179:007:15:122
1070902995451,3cyclictest1102913-21kworker/u8:3+events_unbound08:30:252
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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