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2026-04-16 - 16:29
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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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack8slot4.osadl.org (updated Thu Apr 16, 2026 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35469262230179,41sleep00-21swapper/007:06:270
35469762227165,20sleep30-21swapper/307:07:103
35468832225176,40sleep20-21swapper/207:05:492
35469332217164,17sleep70-21swapper/707:06:347
35469972216187,18sleep60-21swapper/607:07:306
35490992214187,17sleep50-21swapper/507:09:465
35490342214185,19sleep40-21swapper/407:08:484
35468622211179,21sleep10-21swapper/107:05:321
3549368994016,24cyclictest0-21swapper/412:11:184
354936099340,29cyclictest0-21swapper/210:45:012
3549368993326,2cyclictest3593031-21munin-run08:30:014
354936099330,32cyclictest1-21systemd11:50:012
3549376993228,3cyclictest3584932-21sh08:15:017
3549368993227,1cyclictest3655230-21munin-run10:25:024
3549368993227,1cyclictest3650447-21apt-get10:17:584
3549368993226,1cyclictest3728996-21sh12:40:004
3549376993127,3cyclictest0-21swapper/707:25:017
354936999317,24cyclictest0-21swapper/512:11:205
3549368993128,2cyclictest3598399-21cron08:40:004
3549360993127,3cyclictest0-21swapper/210:17:572
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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