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2026-04-17 - 16:41
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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 Apr 17, 2026 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27766432240178,19sleep70-21swapper/707:09:247
27745992235175,18sleep40-21swapper/407:07:534
27744472224167,18sleep30-21swapper/307:05:433
27766132219166,42sleep60-21swapper/607:08:596
27766322215187,18sleep50-21swapper/507:09:135
27745412215182,21sleep20-21swapper/207:07:022
27745402207179,18sleep10-21swapper/107:07:011
27744942207174,21sleep00-21swapper/007:06:200
2776927993228,3cyclictest2810070-21dump-pmu-power08:10:004
277691999320,31cyclictest2850767-21debian-sa109:25:011
277693699310,29cyclictest2865104-21apt-get09:52:587
277693399310,30cyclictest2801985-21dump-pmu-power07:55:016
277691999310,30cyclictest0-21swapper/112:40:011
277693699300,29cyclictest0-21swapper/709:40:007
277693099300,29cyclictest2799297-21turbostat.cron07:50:025
277692799300,29cyclictest2872560-21latency_hist10:05:014
277692599300,29cyclictest0-21swapper/307:17:573
277692199300,29cyclictest2918586-21dump-pmu-power11:30:012
277692199300,29cyclictest2888966-21sh10:35:012
277692199300,29cyclictest2888966-21sh10:35:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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