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2026-07-07 - 22:05
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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 50 highest latencies:
System rackeslot6.osadl.org (updated Tue Jul 07, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
355670199137126,8cyclictest3609993-21latency_hist09:55:011
355670199129123,5cyclictest3656713-21kworker/u8:1+events_unbound12:35:001
355670099126112,11cyclictest1213033-21systemd-journal07:20:010
355670099125115,7cyclictest3640755-21latency_hist11:30:000
355670199124116,5cyclictest3569467-21kworker/u8:0+events_unbound07:50:001
355670199121109,8cyclictest3558200-21latency_hist07:15:021
355670199114106,6cyclictest3569470-21kworker/u8:3+events_unbound07:55:011
3556701991090,106cyclictest1-21systemd07:20:001
3556700991051,99cyclictest1-21systemd09:25:000
35567019910498,4cyclictest3553762-21kworker/u8:0+events_unbound07:30:271
35567019910087,11cyclictest510-21rs:main1
3556701999892,4cyclictest3583160-21kworker/u8:0+events_unbound08:50:011
3556701999892,4cyclictest3583160-21kworker/u8:0+events_unbound08:50:011
3556700999584,7cyclictest1213033-21systemd-journal11:20:010
3556701999488,4cyclictest3590149-21kworker/u8:3+flush-179:008:55:231
3556701999385,5cyclictest3574719-21kworker/u8:3+flush-179:008:25:171
3556701999385,5cyclictest3574719-21kworker/u8:3+flush-179:008:25:171
3556701999384,7cyclictest3628068-21kworker/u8:1+flush-179:010:55:011
3556700999382,8cyclictest3621139-21latency_hist10:30:010
3556701999184,5cyclictest3628068-21kworker/u8:1+events_unbound11:00:231
3556701999182,6cyclictest3597296-21kworker/u8:3+flush-179:009:55:181
3556701999079,6cyclictest3647104-21kworker/u8:0+events_unbound12:20:171
3556700999081,7cyclictest3614819-21kworker/u8:1+flush-179:010:20:010
3556700999080,7cyclictest3632803-21latency_hist11:05:010
3556701998983,4cyclictest3634422-21kworker/u8:3+flush-179:011:45:171
3556700998979,7cyclictest3578139-21kworker/u8:1+flush-179:008:45:260
3556700998979,7cyclictest3578139-21kworker/u8:1+flush-179:008:45:260
3556700998979,7cyclictest3562979-21latency_hist07:30:010
3556701998880,6cyclictest3647104-21kworker/u8:0+flush-179:012:00:181
3556701998880,5cyclictest1213033-21systemd-journal08:15:001
3556701998783,3cyclictest3553762-21kworker/u8:0+flush-179:007:35:221
3556701998775,8cyclictest3600491-21kworker/u8:2+flush-179:009:30:201
3556701998677,7cyclictest3619808-21apt-get10:25:111
3556701998677,6cyclictest3597296-21kworker/u8:3+flush-179:009:25:171
3556701998579,4cyclictest3571036-21apt-get07:55:031
3556701998478,4cyclictest3578139-21kworker/u8:1+flush-179:009:10:211
3556701998477,4cyclictest3594070-21kworker/u8:0+events_unbound09:05:001
3556700998469,8cyclictest3606289-21kworker/u8:0+events_unbound10:30:170
3556701998378,4cyclictest3581131-21kworker/u8:2+events_unbound08:40:001
3556701998378,3cyclictest3650363-21kworker/u8:3+flush-179:012:15:191
3556701998377,4cyclictest3569467-21kworker/u8:0+flush-179:008:05:171
3556701998371,9cyclictest1213033-21systemd-journal08:45:011
3556701998370,9cyclictest3614775-21latency_hist10:10:011
3556700998376,4cyclictest3634422-21kworker/u8:3+events_unbound11:45:000
3556700998372,8cyclictest3656682-21latency_hist12:20:010
3556701998274,5cyclictest3647104-21kworker/u8:0+flush-179:012:05:241
3556701998271,5cyclictest3583160-21kworker/u8:0+events_unbound08:50:251
3556701998269,10cyclictest3634370-21kworker/u8:1+flush-179:011:15:261
3556701998172,6cyclictest3563002-21kworker/u8:2+events_unbound08:05:001
3556700998171,7cyclictest1213033-21systemd-journal09:40:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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