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2026-03-25 - 22:39
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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 rack8slot4.osadl.org (updated Wed Mar 25, 2026 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32177132239185,19sleep00-21swapper/007:07:500
32197572230174,42sleep40-21swapper/407:09:224
32177052228170,18sleep20-21swapper/207:07:442
32177062226173,42sleep30-21swapper/307:07:443
32175492226196,19sleep60-21swapper/607:05:316
32176362217133,18sleep70-21swapper/707:06:457
32176772212182,20sleep10-21swapper/107:07:191
32197492206176,19sleep50-21swapper/507:09:165
322004999354,30cyclictest3345811-21latency_hist11:00:017
322004299340,32cyclictest3277419-21munin-run08:55:014
322004799330,1cyclictest0-21swapper/607:20:016
322004299330,1cyclictest1-21systemd09:45:014
322004299320,28cyclictest3319213-21apt-get10:13:014
322004999310,3cyclictest3231364-21idleruntime-cro07:30:017
322004999310,29cyclictest0-21swapper/710:45:027
3220047993127,3cyclictest3384136-21apt-get12:13:016
322004799310,30cyclictest0-21swapper/610:48:016
322004799310,28cyclictest1-21systemd08:55:016
3220042993129,1cyclictest3353886-21sh11:15:024
3220037993128,2cyclictest3291132-21idleruntime-cro09:20:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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