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2025-12-21 - 03:09
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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 Dec 21, 2025 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12895892264185,28sleep00-21swapper/019:05:180
12906902258184,60sleep10-21swapper/119:05:321
179699520,4rtkit-daemon1795-21rtkit-daemon23:20:211
179699510,3rtkit-daemon1795-21rtkit-daemon21:02:530
179699500,3rtkit-daemon1795-21rtkit-daemon21:15:420
179699470,3rtkit-daemon1795-21rtkit-daemon22:51:150
179699470,3rtkit-daemon1795-21rtkit-daemon19:14:510
14185702460,4chrt0-21swapper/000:25:170
179699360,4rtkit-daemon1795-21rtkit-daemon00:19:480
179699360,3rtkit-daemon0-21swapper/020:57:380
129124399363,10cyclictest1362451-21apt-get22:05:171
129124399360,34cyclictest0-21swapper/121:10:271
179699350,3rtkit-daemon0-21swapper/119:57:251
179699350,3rtkit-daemon0-21swapper/100:24:301
179699340,5rtkit-daemon1795-21rtkit-daemon23:03:370
179699340,4rtkit-daemon1795-21rtkit-daemon20:53:380
179699340,3rtkit-daemon1795-21rtkit-daemon19:47:580
179699340,3rtkit-daemon1795-21rtkit-daemon19:17:090
179699340,3rtkit-daemon0-21swapper/123:17:270
179699340,3rtkit-daemon0-21swapper/122:18:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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