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2025-12-26 - 18:13
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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 Fri Dec 26, 2025 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28554702229171,20sleep70-21swapper/707:05:397
28556032225171,17sleep60-21swapper/607:07:306
28577152217187,19sleep20-21swapper/207:10:002
28576542216184,20sleep00-21swapper/007:09:100
28556182214179,23sleep30-21swapper/307:07:433
28555042213185,18sleep50-21swapper/507:06:085
28577142212183,18sleep10-21swapper/107:09:591
28554942207175,20sleep40-21swapper/407:05:594
2857955996259,3cyclictest0-21swapper/209:15:012
285795599330,28cyclictest0-21swapper/212:03:162
285795399331,31cyclictest2986829-21/usr/sbin/munin11:08:221
285795899320,31cyclictest2986218-21debian-sa111:05:023
285796699310,30cyclictest2970052-21debian-sa110:35:016
285796499310,30cyclictest2999685-21dump-pmu-power11:30:015
2857955993128,2cyclictest3032905-21apt-get12:33:152
2857955993128,2cyclictest2940563-21apt-get09:43:152
2857953993128,2cyclictest2986220-21turbostat.cron11:05:011
2857948993129,1cyclictest0-21swapper/010:45:020
285796499300,2cyclictest2967363-21latency_hist10:30:025
285796099300,29cyclictest0-21swapper/410:08:164
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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