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2026-05-19 - 09:29
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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 Tue May 19, 2026 00:44:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17212122231169,19sleep30-21swapper/319:07:243
17213022230171,19sleep10-21swapper/119:08:441
17212532223166,46sleep60-21swapper/619:08:016
17213772219188,21sleep20-21swapper/219:09:502
17212702212183,18sleep50-21swapper/519:08:165
17212632211180,20sleep70-21swapper/719:08:107
17211362204173,20sleep40-21swapper/419:06:224
17213482202168,23sleep00-21swapper/019:09:230
172163299421,40cyclictest1-21systemd21:10:023
172163899320,31cyclictest1755635-21cron20:10:015
1721642993126,4cyclictest1780673-21unix_chkpwd20:55:017
172164199310,30cyclictest1853158-21munin-run23:05:016
172164199310,29cyclictest1766766-21cron20:30:016
172164199310,29cyclictest1766766-21cron20:30:016
1721636993126,4cyclictest1-21systemd19:25:014
172163699310,31cyclictest1-21systemd21:55:024
1721632993128,3cyclictest0-21swapper/322:35:013
172163099310,30cyclictest1792244-21latency_hist21:15:022
1721625993128,2cyclictest1736161-21cron19:35:010
1721642993028,1cyclictest290-21plymouthd23:15:017
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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