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2025-10-29 - 01:38
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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 Tue Oct 28, 2025 12:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
11465802210182,19sleep30-21swapper/307:08:073
11464582199171,18sleep20-21swapper/207:06:292
11464612197169,18sleep00-21swapper/007:06:300
11466532195167,19sleep10-21swapper/107:09:001
1146912997259,12cyclictest1246388-21latency_hist08:45:010
1146917996953,14cyclictest1209840-21kworker/u8:0+flush-179:008:25:312
1146912996748,12cyclictest1428363-21latency_hist11:40:010
1146918996561,3cyclictest247557-21chrome07:45:023
1146918995956,2cyclictest1354889-21kworker/u8:2+flush-179:010:30:103
1146918995649,3cyclictest1194618-21kworker/u8:2+events_unbound07:55:083
1146918995552,2cyclictest1365698-21kworker/u8:5+flush-179:010:40:253
1146918995551,3cyclictest1365697-21kworker/u8:4+events_unbound11:10:113
1146917995551,2cyclictest1277092-21kworker/u8:0+flush-179:009:40:292
1146916995551,2cyclictest1309504-21snmp_wanswitch.09:45:021
1146918995349,3cyclictest1433206-21kworker/u8:2+events_unbound11:49:593
1146918995349,3cyclictest1319467-21kworker/u8:4+flush-179:010:20:193
1146917995350,2cyclictest1282941-21/usr/share/muni09:20:032
1146916995350,2cyclictest1130669-21kworker/u8:3+flush-179:007:35:001
1146917995248,3cyclictest1271275-21kworker/u8:3+flush-179:009:30:222
1146917995247,4cyclictest1319467-21kworker/u8:4+flush-179:009:53:552
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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