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2026-04-21 - 16:13
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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 Tue Apr 21, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4138312269191,28sleep00-21swapper/007:06:210
4141722247181,51sleep10-21swapper/107:10:001
5793442680,4sleep1578454-21/usr/sbin/munin11:45:221
5335692540,3sleep1533225-21python310:45:021
179699540,4rtkit-daemon1795-21rtkit-daemon10:13:071
5262552510,4sleep0526253-21fschecks_time10:35:200
179699470,4rtkit-daemon1795-21rtkit-daemon11:14:240
179699470,3rtkit-daemon1795-21rtkit-daemon09:30:540
179699460,3rtkit-daemon0-21swapper/007:16:410
179699420,3rtkit-daemon0-21swapper/111:33:380
179699420,3rtkit-daemon0-21swapper/011:06:450
179699410,4rtkit-daemon1795-21rtkit-daemon11:55:291
179699410,3rtkit-daemon0-21swapper/112:34:570
179699410,3rtkit-daemon0-21swapper/109:50:350
179699410,3rtkit-daemon0-21swapper/011:24:490
179699400,3rtkit-daemon0-21swapper/011:18:500
179699400,3rtkit-daemon0-21swapper/011:10:241
179699400,3rtkit-daemon0-21swapper/007:38:570
179699390,3rtkit-daemon0-21swapper/010:02:070
179699390,3rtkit-daemon0-21swapper/009:55:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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