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2026-03-14 - 06:48
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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 Sat Mar 14, 2026 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
785481999584,8cyclictest869739-21latency_hist23:30:010
785481999484,7cyclictest824125-21kworker/u8:0+flush-179:021:15:000
785481999183,5cyclictest811651-21kworker/u8:0+events_unbound20:45:240
785481999081,6cyclictest882835-21latency_hist00:10:010
785485998880,5cyclictest821016-21kworker/u8:2+flush-179:021:15:021
785485998781,4cyclictest879516-21kworker/u8:0+events_unbound00:04:001
785485998780,4cyclictest768193-21kworker/u8:0+events_unbound19:20:011
785485998771,13cyclictest879362-40mandb00:00:001
785485998678,6cyclictest821016-21kworker/u8:2+flush-179:021:05:011
785481998566,16cyclictest886024-21latency_hist00:20:010
785485998377,4cyclictest811651-21kworker/u8:0+events_unbound20:35:221
785485998377,4cyclictest793376-21kworker/u8:1+events_unbound19:59:591
785485998270,4cyclictest784111-21kworker/u8:1+events_unbound19:15:011
785485998175,4cyclictest814068-21kworker/u8:1+flush-179:020:45:011
785485997972,4cyclictest811651-21kworker/u8:0+events_unbound20:30:221
785485997870,5cyclictest852266-21kworker/u8:3+events_unbound22:35:161
78548199780,76cyclictest1-21systemd20:15:010
785485997771,4cyclictest844263-21kworker/u8:1+flush-179:022:15:011
785485997769,6cyclictest844263-21kworker/u8:1+flush-179:023:20:011
785485997763,12cyclictest873169-21kworker/u8:3+flush-179:000:10:201
785485997666,7cyclictest877740-21latency_hist23:55:011
785481997565,8cyclictest266-21systemd-journal20:30:000
785485997465,7cyclictest817779-21latency_hist20:50:001
785485997364,7cyclictest791804-21latency_hist19:30:011
785481997364,6cyclictest844263-21kworker/u8:1+flush-179:022:45:240
785485997064,5cyclictest824125-21kworker/u8:0+events_unbound22:20:231
785485997062,6cyclictest811651-21kworker/u8:0+flush-179:020:50:211
785485996963,4cyclictest844263-21kworker/u8:1+flush-179:022:20:001
785485996963,4cyclictest806627-21kworker/u8:1+events_unbound20:15:001
785485996960,6cyclictest876156-21latency_hist23:50:011
785485996863,4cyclictest824125-21kworker/u8:0+flush-179:021:49:551
785485996862,4cyclictest831072-21kworker/u8:3+flush-179:021:50:241
785485996862,4cyclictest806627-21kworker/u8:1+flush-179:020:25:201
785485996760,5cyclictest887601-21kworker/u8:0+flush-179:000:29:561
785485996758,6cyclictest793376-21kworker/u8:1+flush-179:019:50:251
785481996645,5cyclictest845861-21latency_hist22:15:010
785485996559,4cyclictest844263-21kworker/u8:1+flush-179:022:35:001
785481996559,4cyclictest844263-21kworker/u8:1+flush-179:022:25:240
785481996558,4cyclictest814068-21kworker/u8:1+flush-179:020:40:240
785485996458,4cyclictest871312-21kworker/u8:2+flush-179:023:39:561
785485996458,4cyclictest793376-21kworker/u8:1+flush-179:020:05:001
785481996454,7cyclictest790217-21latency_hist19:25:010
785481996452,9cyclictest266-21systemd-journal00:00:010
785485996352,9cyclictest849314-21apt-get22:25:111
785481996358,3cyclictest873169-21kworker/u8:3+flush-179:023:49:550
785481996354,6cyclictest809863-21kworker/u8:3+flush-179:020:35:200
785481996353,8cyclictest834208-21latency_hist21:40:000
785481996340,7cyclictest844276-21latency_hist22:10:010
785485996152,6cyclictest804775-21kworker/u8:0+flush-179:020:15:201
785485996055,4cyclictest820936-21kworker/u8:0+flush-179:021:00:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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