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2026-05-11 - 10:48
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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
Characteristics of the 20 highest latencies:
System rackcslot4.osadl.org (updated Mon May 11, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17265602246188,44sleep10-21swapper/119:07:161
17264462239197,28sleep00-21swapper/019:06:010
18596902590,2sleep01858865-21/usr/sbin/munin23:00:220
179699560,4rtkit-daemon1795-21rtkit-daemon23:06:451
179699540,4rtkit-daemon1795-21rtkit-daemon23:02:191
179699540,3rtkit-daemon1795-21rtkit-daemon00:19:021
179699530,6rtkit-daemon1795-21rtkit-daemon20:25:140
179699530,1rtkit-daemon1795-21rtkit-daemon21:25:120
179699520,9rtkit-daemon0-21swapper/020:37:240
179699520,3rtkit-daemon1795-21rtkit-daemon23:45:180
179699520,3rtkit-daemon1795-21rtkit-daemon19:40:191
179699510,4rtkit-daemon1795-21rtkit-daemon00:02:411
179699500,3rtkit-daemon1795-21rtkit-daemon21:50:201
179699500,3rtkit-daemon0-21swapper/020:45:430
179699480,3rtkit-daemon0-21swapper/020:43:490
179699480,3rtkit-daemon0-21swapper/020:19:040
179699480,3rtkit-daemon0-21swapper/019:14:010
179699470,3rtkit-daemon1795-21rtkit-daemon23:42:381
179699470,3rtkit-daemon1795-21rtkit-daemon21:53:090
179699470,3rtkit-daemon1795-21rtkit-daemon21:30:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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