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2026-03-29 - 12:10
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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 Sun Mar 29, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
422116998476,6cyclictest427091-21latency_hist19:25:010
422121997752,23cyclictest525818-21apt-get00:30:111
422121997648,17cyclictest443256-21apt-get20:15:121
422116997465,7cyclictest451240-21latency_hist20:40:010
422116997164,5cyclictest507722-21latency_hist23:35:010
422116996657,6cyclictest506134-21latency_hist23:30:020
422121996542,21cyclictest523977-21latency_hist00:25:001
422121996357,5cyclictest468979-21kworker/u8:2+flush-179:021:39:591
422121996355,6cyclictest462593-21kworker/u8:1+flush-179:022:15:221
42212199621,57cyclictest0-21swapper/122:40:121
422116996254,6cyclictest455995-21latency_hist20:55:010
422122996156,3cyclictest0-21swapper/219:59:002
422121996051,7cyclictest473808-21kworker/u8:2+flush-179:022:40:001
422121996050,8cyclictest462877-21apt-get21:15:131
422121996026,21cyclictest510291-21grep23:40:191
422116996054,5cyclictest266-21systemd-journal21:25:010
422116996047,11cyclictest266-21systemd-journal00:40:000
422126995856,1cyclictest0-21swapper/319:58:593
422121995853,4cyclictest427126-21kworker/u8:1+flush-179:020:05:221
422121995750,5cyclictest512536-21kworker/u8:2+events_unbound00:03:591
422116995753,2cyclictest714-21Xorg20:15:590
422116995746,9cyclictest497915-21apt-get23:05:120
422116995727,14cyclictest460990-21apt-key21:10:010
422121995652,2cyclictest714-21Xorg19:28:001
422121995648,6cyclictest476948-21latency_hist22:00:011
422116995651,4cyclictest714-21Xorg20:43:590
422121995549,5cyclictest443050-21kworker/u8:3+flush-179:020:30:231
422116995545,8cyclictest439828-21latency_hist20:05:010
422121995449,4cyclictest512536-21kworker/u8:2+flush-179:000:40:001
422121995348,3cyclictest417505-21kworker/u8:3+flush-179:019:35:111
422121995345,7cyclictest266-21systemd-journal23:25:201
422121995344,6cyclictest525564-21latency_hist00:30:011
422121995339,13cyclictest432931-21kworker/u8:2+flush-179:020:55:261
42212199530,39cyclictest431870-21turbostat19:44:551
422116995347,4cyclictest512536-21kworker/u8:2+flush-179:000:04:000
422121995244,5cyclictest421970-21latency_hist19:10:011
422116995241,9cyclictest422539-21diskstats19:10:140
422116995240,10cyclictest474316-21diskstats21:50:150
422116995148,2cyclictest0-21swapper/000:20:000
422121995039,9cyclictest428934-21apt-get19:30:101
422121995029,19cyclictest496108-21systemd-run23:00:001
422116995045,4cyclictest519228-21kworker/u8:3+flush-179:000:20:240
4577091490,13ptp4l61490irq/134-eno1-TxRx-019:10:003
42212199490,45cyclictest0-21swapper/121:10:031
422116994943,4cyclictest427126-21kworker/u8:1+flush-179:019:30:220
422116994942,5cyclictest432931-21kworker/u8:2+flush-179:020:20:200
422116994911,32cyclictest489960-21apt-get22:40:130
422121994840,6cyclictest510-21rs:main1
422121994835,11cyclictest515727-40mandb00:00:021
422116994841,6cyclictest480146-21munin-run22:10:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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