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2026-05-16 - 20:33
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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 Sat May 16, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33096899120108,9cyclictest350021-21apt-get08:10:041
3309689911296,12cyclictest1213033-21systemd-journal08:40:001
3309689910194,5cyclictest427477-21apt-get12:08:551
330963999993,4cyclictest318414-21kworker/u8:2+events_unbound07:20:010
330963999686,7cyclictest429104-21latency_hist12:15:010
330963999274,15cyclictest393522-21latency_hist10:25:010
330968998877,8cyclictest1213033-21systemd-journal12:40:011
330963998781,4cyclictest408139-21kworker/u8:0+events_unbound11:40:250
330968998376,6cyclictest362982-21kworker/u8:0+flush-179:009:00:001
330968998175,4cyclictest363261-21apt-get08:50:121
330968998171,8cyclictest1213033-21systemd-journal07:55:161
330963998171,7cyclictest361656-21/usr/sbin/munin08:45:230
330968998072,6cyclictest377308-21kworker/u8:2+flush-179:010:00:251
330963997973,5cyclictest366163-21kworker/u8:1+flush-179:009:29:550
330963997970,6cyclictest385568-21latency_hist10:00:010
330963997772,4cyclictest411334-21kworker/u8:1+flush-179:011:30:000
330963997671,4cyclictest354534-21kworker/u8:1+flush-179:008:34:550
330963997663,11cyclictest1213033-21systemd-journal08:25:010
330968997559,15cyclictest411334-21kworker/u8:1+flush-179:011:30:251
330963997465,6cyclictest430702-21latency_hist12:20:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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