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2026-07-14 - 14:46
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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 Tue Jul 14, 2026 12:44:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2413352230167,20sleep60-21swapper/607:05:526
2415342229168,20sleep70-21swapper/707:08:437
2415022226166,19sleep20-21swapper/207:08:142
2414242225167,19sleep10-21swapper/107:07:081
2415692218163,44sleep40-21swapper/407:09:124
2414262212183,19sleep30-21swapper/307:07:103
2415742211179,21sleep00-21swapper/007:09:160
2413722206183,15sleep50-21swapper/507:06:245
242761995451,2cyclictest856-21dbus-daemon09:15:017
242736995046,2cyclictest0-21swapper/009:15:010
242758994240,1cyclictest290-21plymouthd09:15:016
242740994036,3cyclictest1-21systemd09:15:012
24274399330,29cyclictest0-21swapper/311:10:013
24273699330,32cyclictest412256-21head12:15:010
24276199320,31cyclictest337067-21cron10:00:007
24275899320,4cyclictest389934-21ls11:35:016
24275299320,31cyclictest281578-21latency08:20:015
242739993227,4cyclictest253520-21unix_chkpwd07:30:021
242739993227,4cyclictest1-21systemd10:05:011
24273999320,31cyclictest0-21swapper/111:30:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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