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2025-07-15 - 01:55
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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 Mon Jul 14, 2025 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3218862237176,19sleep30-21swapper/307:07:213
3219402230170,18sleep10-21swapper/107:08:071
3198202230176,17sleep70-21swapper/707:05:327
3218602229171,18sleep40-21swapper/407:06:584
3219442227170,45sleep50-21swapper/507:08:115
3219362222170,41sleep60-21swapper/607:08:046
3220722213186,17sleep00-21swapper/007:09:590
3198152205173,20sleep20-21swapper/207:05:272
32228299324,28cyclictest0-21swapper/608:00:006
32228699310,30cyclictest483341-21apt-get12:05:007
32228299310,30cyclictest464488-21cron11:30:016
32227799310,30cyclictest328213-21sh07:20:015
322271993127,3cyclictest467189-21munin-run11:35:013
32227199310,30cyclictest0-21swapper/311:46:183
322286993030,0cyclictest0-21swapper/709:46:177
32227399300,29cyclictest497069-21munin-run12:30:004
32227399300,29cyclictest437560-21apt-get10:41:184
32227399300,29cyclictest437031-21cron10:40:014
32227399300,29cyclictest333604-21sh07:30:004
322271993027,3cyclictest364016-21apt-get08:26:183
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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