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2026-04-04 - 04:11
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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 10 highest latencies:
System rackeslot6.osadl.org (updated Sat Apr 04, 2026 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1088809910696,8cyclictest203270-21apt-get00:00:000
108880999887,9cyclictest162692-21latency_hist21:55:010
108880999586,7cyclictest120300-21latency_hist19:45:020
108881999081,7cyclictest163187-21kworker/u8:1+flush-179:022:10:171
108881998778,6cyclictest128560-21kworker/u8:3+flush-179:020:30:151
108880998676,7cyclictest175945-21latency_hist22:35:010
108880998577,6cyclictest135388-21latency_hist20:30:010
108880998371,9cyclictest110429-21latency_hist19:15:020
108881998175,4cyclictest154788-21kworker/u8:3+flush-179:021:45:161
108881998072,6cyclictest266-21systemd-journal20:10:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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