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2025-11-09 - 04:18
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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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack9slot2.osadl.org (updated Sun Nov 09, 2025 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
165252336280,44sleep20-21swapper/22
165482316278,25sleep00-21swapper/00
164862314275,26sleep10-21swapper/11
165462279190,74sleep30-21swapper/33
16856992741,3cyclictest25524-21munin-run1
1686199227212,13cyclictest2082-21systemd-journal2
1686499221216,3cyclictest0-21swapper/33
1685399212207,3cyclictest25543-21apt-get0
2605021670,1sleep30-21swapper/33
1786721650,4sleep30-21swapper/33
652121340,2sleep31686499cyclictest3
16856995115,24cyclictest31365-21seq1
16856994814,19cyclictest27307-21seq1
16856994714,19cyclictest5345-21seq1
16856994714,19cyclictest32112-21seq1
1685699449,20cyclictest19901-21seq1
16856994412,18cyclictest22977-21seq1
70752420,4sleep07077-21timerandwakeup0
1685699427,20cyclictest17001-21seq1
181602400,2sleep30-21swapper/33
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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