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2025-08-29 - 14:40
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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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackeslot6.osadl.org (updated Fri Aug 29, 2025 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
254555999129118,8cyclictest2648620-21apt-get00:30:031
25455589911294,15cyclictest2561423-21http20:00:010
254555899112100,9cyclictest2635797-21apt-get23:50:130
25455599910795,9cyclictest2561394-21apt-get20:00:011
25455599910594,8cyclictest2561522-21store20:00:021
25455589910591,11cyclictest2611570-21apt-get22:35:140
25455599910188,10cyclictest2581037-21apt-get21:00:141
25455589910191,7cyclictest2645161-21apt-get00:20:010
2545558999887,8cyclictest2635542-21latency_hist23:50:010
2545558999788,5cyclictest2627244-21kworker/u8:0+flush-179:023:30:210
2545559999385,6cyclictest2566673-21apt-get20:15:121
2545558999183,6cyclictest2630734-21kworker/u8:2+flush-179:023:55:260
2545558999182,7cyclictest2560443-21kworker/u8:1+flush-179:020:00:020
2545559998678,6cyclictest2556583-21kworker/u8:0+flush-179:019:45:011
2545559998476,6cyclictest2583993-21kworker/u8:3+flush-179:021:15:291
2545559998373,8cyclictest2592179-21apt-get21:35:151
2545559998373,8cyclictest2592179-21apt-get21:35:141
2545558998371,10cyclictest2627521-21apt-get23:25:130
2545559998274,5cyclictest2556641-21kworker/u8:3+flush-179:020:10:261
2545559998173,6cyclictest2601739-21kworker/u8:0+flush-179:022:10:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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