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2026-04-08 - 14:29
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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 Wed Apr 08, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23400492322280,27sleep00-21swapper/019:06:150
23400752264221,29sleep10-21swapper/119:06:321
250276721590,5sleep02502687-21munin-run23:50:010
25034002690,4sleep02503362-40apt-check23:50:120
24181132640,5sleep02418000-21python321:50:010
234053599632,42cyclictest2474953-21apt-get23:10:130
234053599632,41cyclictest2392913-21apt-get21:15:110
234053599622,42cyclictest2461057-21apt-get22:50:110
179699600,1rtkit-daemon1795-21rtkit-daemon21:34:270
234053599593,38cyclictest2352991-21apt-get19:40:110
234053599583,38cyclictest2400061-21apt-get21:25:140
234053599580,5cyclictest2397319-21/usr/sbin/munin21:20:190
179699570,3rtkit-daemon1795-21rtkit-daemon20:50:000
179699570,3rtkit-daemon0-21swapper/020:30:060
234053599567,30cyclictest2436197-21apt-get22:15:110
234053599567,30cyclictest2346874-21seq19:24:430
234053599560,3cyclictest2361376-21cat20:00:190
179699560,3rtkit-daemon1795-21rtkit-daemon23:39:550
179699560,3rtkit-daemon1795-21rtkit-daemon23:03:560
234053599552,30cyclictest2471468-21apt-get23:05:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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