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2025-11-17 - 07:09
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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 50 highest latencies:
System rack9slot2.osadl.org (updated Mon Nov 17, 2025 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
221272301207,57sleep20-21swapper/22
2394299277268,6cyclictest12700-21sendmail-mta0
2394899271261,6cyclictest12651-21munin-run1
234662266209,44sleep30-21swapper/33
236672264191,43sleep00-21swapper/00
236422262201,48sleep10-21swapper/11
2395499167163,2cyclictest292-21jbd2/mmcblk0p2-2
2395999157151,4cyclictest505-21dbus-daemon3
259252610,5sleep20-21swapper/22
280842560,4sleep228-21ksoftirqd/22
272312550,2sleep10-21swapper/11
155712490,5sleep20-21swapper/22
138582490,4sleep22395499cyclictest2
282292480,4sleep30-21swapper/33
300292470,2sleep00-21swapper/00
237402430,2sleep30-21swapper/33
120132430,1sleep30-21swapper/33
240102330,1sleep20-21swapper/22
2394899330,31cyclictest26750-21kworker/1:21
298422300,1sleep30-21swapper/33
2394299300,28cyclictest27155-21kworker/0:10
2395499288,17cyclictest920-21apt-key2
2395499286,19cyclictest0-21swapper/22
92492270,3sleep10-21swapper/11
2395499255,17cyclictest8784-21cat2
2395499255,17cyclictest2700-21cat2
262902240,2sleep20-21swapper/22
23959992419,3cyclictest11089-21tail3
2395499244,18cyclictest505-21dbus-daemon2
2395499241,20cyclictest28530-21munin-run2
23954992411,11cyclictest28-21ksoftirqd/22
23954992410,12cyclictest28-21ksoftirqd/22
2395499234,17cyclictest6739-21cat2
2395499231,8cyclictest24141-21apt-get2
23954992317,4cyclictest10333-21gdbus2
23954992311,8cyclictest17753-21munin-run2
2395499231,18cyclictest0-21swapper/22
244842220,2sleep30-21swapper/33
2395499224,16cyclictest15101-40mandb2
2395499223,17cyclictest24282-21cat2
23954992216,3cyclictest5996-21sed2
23954992216,3cyclictest16436-21sleep2
23954992216,3cyclictest16436-21sleep2
23954992215,4cyclictest4595-21sh2
2395499221,4cyclictest10333-21gdbus2
2395499221,3cyclictest22348-1kworker/2:0H2
2395499221,3cyclictest20787-21munin-run2
2395499221,19cyclictest22809-21perf2
2395499221,19cyclictest1-21systemd2
2395499221,18cyclictest23118-1kworker/2:2H2
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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