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2026-04-12 - 11:26
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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 Sun Apr 12, 2026 00:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28089192328285,29sleep10-21swapper/119:09:241
28086292326285,27sleep00-21swapper/019:06:170
287897621580,4sleep1251rcuc/121:38:531
29304702660,5sleep00-21swapper/022:50:200
179699580,4rtkit-daemon1795-21rtkit-daemon23:05:261
29853322550,4sleep00-21swapper/000:08:040
29965662520,1chrt2996567-21/usr/sbin/munin00:25:211
28198032480,1chrt2819802-21/usr/sbin/munin19:35:141
179699450,8rtkit-daemon0-21swapper/122:22:131
179699450,3rtkit-daemon0-21swapper/122:55:441
179699440,3rtkit-daemon0-21swapper/120:58:281
179699440,3rtkit-daemon0-21swapper/119:48:291
179699440,3rtkit-daemon0-21swapper/119:43:261
179699440,3rtkit-daemon0-21swapper/119:13:311
179699440,3rtkit-daemon0-21swapper/100:13:361
179699430,3rtkit-daemon0-21swapper/122:07:221
179699430,3rtkit-daemon0-21swapper/120:33:051
179699430,3rtkit-daemon0-21swapper/120:33:041
179699430,3rtkit-daemon0-21swapper/120:12:441
179699430,3rtkit-daemon0-21swapper/119:59:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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