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2025-12-26 - 12:38
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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
Characteristics of the 50 highest latencies:
System rackcslot4.osadl.org (updated Fri Dec 26, 2025 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
759182269210,45sleep00-21swapper/019:05:280
766062249178,56sleep10-21swapper/119:07:121
2212132990,4sleep10-21swapper/123:10:391
179699790,3rtkit-daemon0-21swapper/022:13:070
1756412640,4sleep10-21swapper/122:13:031
76976995718,9cyclictest1-21systemd23:05:010
76976995717,14cyclictest142586-21/usr/sbin/munin21:30:240
76976995618,9cyclictest285674-21ssh00:35:260
76976995617,8cyclictest1-21systemd23:50:010
76976995616,11cyclictest125007-21ssh21:09:590
76976995615,14cyclictest158968-21grep21:50:240
76976995615,14cyclictest148868-21latency_hist21:40:010
76976995615,11cyclictest187984-21munin-run22:30:000
76976995614,12cyclictest276794-21grep00:25:000
76976995614,12cyclictest219524-21cat23:10:010
76976995516,10cyclictest1-21systemd20:15:000
76976995515,9cyclictest169136-21latency_hist22:05:010
76976995418,13cyclictest211287-21cron23:00:000
76976995416,9cyclictest1-21systemd21:05:010
76976995415,11cyclictest280602-21latency_hist00:30:000
76976995318,9cyclictest1-21systemd20:50:080
76976995316,14cyclictest243385-21ntpq23:40:220
76976995315,8cyclictest763-21dbus-daemon22:18:210
76976995315,11cyclictest184419-21date22:25:000
76976995314,10cyclictest133558-21sh21:20:010
76976995314,10cyclictest129579-21date21:15:010
76976995314,10cyclictest1-21systemd20:50:010
76976995218,12cyclictest194444-21taskset22:37:250
76976995217,10cyclictest81571-21latency_hist19:20:010
76976995216,8cyclictest1-21systemd23:40:010
76976995216,13cyclictest220700-21ssh23:10:260
76976995216,10cyclictest191861-21munin-run22:35:000
76976995215,9cyclictest1-21systemd19:25:000
76976995215,8cyclictest1-21systemd23:20:000
76976995215,8cyclictest1-21systemd21:00:010
76976995215,11cyclictest110982-21apt-get20:35:160
76976995215,10cyclictest234685-21munin-run23:30:000
76976995214,12cyclictest203286-21date22:50:000
179699520,4rtkit-daemon1795-21rtkit-daemon21:57:400
76976995119,8cyclictest153112-21ssh21:44:450
76976995117,8cyclictest272701-21ls00:20:000
76976995116,9cyclictest1-21systemd20:29:590
76976995116,13cyclictest250642-21/usr/sbin/munin23:50:200
76976995116,11cyclictest266055-21grep00:10:230
76976995115,9cyclictest110840-21grep20:35:010
76976995115,9cyclictest104987-21date20:20:010
76976995115,12cyclictest101153-21latency_hist20:10:010
76976995115,11cyclictest228535-21grep23:20:250
76976995113,9cyclictest199446-21sed22:45:000
76976995018,8cyclictest205515-21taskset22:51:480
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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