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2025-11-16 - 00:55
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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 Sat Nov 15, 2025 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10961902233167,21sleep30-21swapper/307:06:213
10962612231176,18sleep00-21swapper/007:07:230
10962032226169,45sleep70-21swapper/707:06:347
10963142222187,23sleep60-21swapper/607:08:096
10942082222168,43sleep50-21swapper/507:05:435
10962472215185,19sleep40-21swapper/407:07:114
10941912214184,19sleep20-21swapper/207:05:322
10963002211176,22sleep10-21swapper/107:07:561
109665399340,29cyclictest0-21swapper/411:31:024
1096648993228,3cyclictest1113662-21idleruntime-cro07:40:013
109665799310,30cyclictest1244807-21cron11:40:015
109665399310,30cyclictest0-21swapper/409:45:584
109664899310,30cyclictest1217653-21awk10:50:003
109664899310,30cyclictest1157539-21sh09:00:003
1096644993131,0cyclictest0-21swapper/209:45:002
109663999310,30cyclictest1154854-21debian-sa108:55:000
1096661993028,1cyclictest0-21swapper/609:45:586
109666199300,2cyclictest1127151-21munin-run08:05:006
109666199300,29cyclictest1187936-21apt-get09:55:596
1096648993028,1cyclictest1196282-21apt-get10:10:573
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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