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2026-03-27 - 11:00
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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 Fri Mar 27, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
326375199122115,5cyclictest3305377-21kworker/u8:2+events_unbound21:45:000
326375199118101,14cyclictest3284315-21http20:15:010
326375299117100,15cyclictest3281117-21kworker/u8:3+flush-179:020:45:011
326375299114102,10cyclictest3304053-21latency_hist21:15:011
326375199114100,11cyclictest266-21systemd-journal00:00:000
32637519910496,6cyclictest3289335-21kworker/u8:2+flush-179:020:40:010
32637519910093,5cyclictest3341547-21kworker/u8:3+flush-179:023:45:010
3263752999587,6cyclictest3305377-21kworker/u8:2+flush-179:021:20:011
3263752999587,6cyclictest3305377-21kworker/u8:2+flush-179:021:20:011
3263751999483,8cyclictest266-21systemd-journal22:30:150
3263752999388,3cyclictest3351570-21kworker/u8:4+events_unbound00:05:251
3263751999382,9cyclictest3295889-21latency_hist20:50:010
3263752999286,4cyclictest3281117-21kworker/u8:3+events_unbound20:50:021
3263752999082,6cyclictest3341547-21kworker/u8:3+events_unbound23:35:001
3263752998780,5cyclictest3312274-21kworker/u8:0+events_unbound21:45:021
3263751998777,8cyclictest266-21systemd-journal21:00:010
3263751998680,4cyclictest3281117-21kworker/u8:3+flush-179:021:05:010
3263751998679,5cyclictest3341547-21kworker/u8:3+events_unbound23:35:220
3263751998676,5cyclictest3305377-21kworker/u8:2+flush-179:021:40:010
3263752998579,5cyclictest3341547-21kworker/u8:3+events_unbound00:04:011
3263752998576,7cyclictest3349988-21kworker/u8:1+flush-179:000:10:131
3263751998474,8cyclictest3328840-21apt-get22:55:120
3263752998375,6cyclictest3250856-21kworker/u8:1+flush-179:019:30:201
3263752998374,6cyclictest3356327-21latency_hist00:20:021
3263751998377,4cyclictest3281117-21kworker/u8:3+flush-179:020:20:220
3263752998276,4cyclictest3266290-21kworker/u8:2+events_unbound19:35:221
3263751998275,5cyclictest3330226-21kworker/u8:3+flush-179:023:04:590
3263752998176,4cyclictest3316700-21kworker/u8:1+flush-179:022:09:591
3263751998175,4cyclictest3355395-21kworker/u8:0+events_unbound00:15:230
3263751998073,4cyclictest3266290-21kworker/u8:2+events_unbound19:25:140
3263752997974,4cyclictest3339947-21kworker/u8:2+events_unbound23:40:161
3263752997972,5cyclictest3305377-21kworker/u8:2+events_unbound22:00:141
3263751997669,5cyclictest3316700-21kworker/u8:1+events_unbound22:25:010
3263751997664,4cyclictest3355395-21kworker/u8:0+events_unbound00:20:150
3263752997570,4cyclictest3351570-21kworker/u8:4+flush-179:000:34:541
3263751997571,2cyclictest1-21systemd23:35:010
3263751997569,4cyclictest3271638-21kworker/u8:0+events_unbound19:40:000
3263751997568,5cyclictest3317017-21kworker/u8:2+events_unbound22:35:240
3263752997468,4cyclictest3250856-21kworker/u8:1+events_unbound19:20:181
3263752997364,4cyclictest3341547-21kworker/u8:3+events_unbound23:45:141
3263751997367,4cyclictest3317017-21kworker/u8:2+flush-179:022:45:210
3263752997267,4cyclictest3326987-21kworker/u8:0+events_unbound22:50:141
3263752997263,7cyclictest3356572-21/usr/sbin/munin00:20:241
3263751997264,6cyclictest3351570-21kworker/u8:4+flush-179:000:25:230
3263751997263,7cyclictest3326987-21kworker/u8:0+events_unbound23:10:000
3263751997166,4cyclictest3305377-21kworker/u8:2+events_unbound21:20:200
3263751997165,4cyclictest3351570-21kworker/u8:4+events_unbound00:35:230
3263751997165,4cyclictest3317017-21kworker/u8:2+events_unbound22:40:250
3263751997162,4cyclictest3250856-21kworker/u8:1+events_unbound19:10:230
3263752997066,3cyclictest3295351-21kworker/u8:0+events_unbound21:05:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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