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2026-01-11 - 11:12
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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 Jan 11, 2026 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29577972265183,28sleep00-21swapper/019:05:520
29578342259176,19sleep10-21swapper/119:06:171
31142002720,4chrt0-21swapper/123:35:141
31540692670,3chrt0-21swapper/100:30:121
179699640,4rtkit-daemon1795-21rtkit-daemon22:50:230
179699590,4rtkit-daemon1795-21rtkit-daemon21:48:421
179699570,3rtkit-daemon0-21swapper/022:47:101
179699560,4rtkit-daemon1795-21rtkit-daemon22:15:541
179699520,3rtkit-daemon1795-21rtkit-daemon23:59:401
29835502510,1chrt2982460-21/usr/sbin/munin20:10:261
179699490,4rtkit-daemon1795-21rtkit-daemon23:37:120
179699490,4rtkit-daemon1795-21rtkit-daemon20:29:451
179699490,3rtkit-daemon1795-21rtkit-daemon19:27:141
179699480,3rtkit-daemon1795-21rtkit-daemon22:49:570
30008682470,4sleep10-21swapper/120:55:211
179699460,3rtkit-daemon1795-21rtkit-daemon22:55:060
179699460,3rtkit-daemon1795-21rtkit-daemon19:52:410
179699450,21rtkit-daemon2958279-21cyclictest00:23:311
179699440,2rtkit-daemon1795-21rtkit-daemon00:39:540
31605972430,5sleep10-21swapper/100:39:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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