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2026-03-31 - 02:52

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #3

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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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 100 highest latencies:
System rack3slot3s.osadl.org (updated Tue Mar 31, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3679492211957,57sleep30-21swapper/33
367937128554,12sleep20-21swapper/22
367963628355,6sleep00-21swapper/00
367931128054,6sleep10-21swapper/11
39973632280,2sleep00-21swapper/00
367978999241,19cyclictest0-21swapper/33
367978999211,15cyclictest0-21swapper/33
3679789992018,1cyclictest0-21swapper/33
367978999201,3cyclictest0-21swapper/33
367978999201,16cyclictest4134235-21chrt3
367978999201,16cyclictest0-21swapper/33
3679789992011,5cyclictest0-21swapper/33
367978999201,15cyclictest0-21swapper/33
367978999201,15cyclictest0-21swapper/33
367978999201,15cyclictest0-21swapper/33
39269802191,4sleep13928713-21grep1
3679789991912,4cyclictest0-21swapper/33
367978999191,15cyclictest0-21swapper/33
367978999191,14cyclictest3763463-21taskset3
367978999191,14cyclictest0-21swapper/33
367978999191,14cyclictest0-21swapper/33
367978999191,14cyclictest0-21swapper/33
367978999191,14cyclictest0-21swapper/33
367978999191,14cyclictest0-21swapper/33
367978999191,14cyclictest0-21swapper/33
367978999191,14cyclictest0-21swapper/33
367978999191,14cyclictest0-21swapper/33
367978999191,14cyclictest0-21swapper/33
367978999191,14cyclictest0-21swapper/33
3679789991910,5cyclictest66950irq/132-enp1s0-TxRx-33
40907552181,8sleep24090766-21ssh2
40904162181,3sleep00-21swapper/00
40184252181,12sleep13810887-21diskmemload1
38267102181,8sleep13810887-21diskmemload1
38154572183,4sleep23815508-21ntpq2
3679789991815,1cyclictest0-21swapper/33
3679789991815,1cyclictest0-21swapper/33
367978999181,14cyclictest0-21swapper/33
367978999181,14cyclictest0-21swapper/33
367978999181,14cyclictest0-21swapper/33
367978999181,14cyclictest0-21swapper/33
367978999181,14cyclictest0-21swapper/33
367978999181,14cyclictest0-21swapper/33
367978999181,14cyclictest0-21swapper/33
367978999181,13cyclictest0-21swapper/33
367978999181,13cyclictest0-21swapper/33
367978999181,13cyclictest0-21swapper/33
367978999180,16cyclictest0-21swapper/33
367978999180,15cyclictest0-21swapper/33
367978999180,15cyclictest0-21swapper/33
367978999180,14cyclictest0-21swapper/33
367978999180,13cyclictest3792475-21taskset3
39315042171,3sleep00-21swapper/00
38374772171,2sleep20-21swapper/22
3679789991712,3cyclictest0-21swapper/33
367978999171,13cyclictest0-21swapper/33
367978999171,13cyclictest0-21swapper/33
367978999171,12cyclictest0-21swapper/33
367978999171,12cyclictest0-21swapper/33
367978999170,14cyclictest0-21swapper/33
367978999170,13cyclictest0-21swapper/33
367978999170,12cyclictest0-21swapper/33
40821082161,2sleep00-21swapper/00
40819762161,4sleep13810887-21diskmemload1
39595782161,4sleep13810887-21diskmemload1
39398802160,1sleep00-21swapper/00
39147892161,3sleep00-21swapper/00
38791202161,4sleep13810887-21diskmemload1
367978999161,14cyclictest0-21swapper/33
367978999161,13cyclictest0-21swapper/33
367978999161,12cyclictest0-21swapper/33
367978999161,12cyclictest0-21swapper/33
367978999160,13cyclictest0-21swapper/33
367978999160,13cyclictest0-21swapper/33
367978999160,12cyclictest0-21swapper/33
40658342151,2sleep20-21swapper/22
40447182151,2sleep00-21swapper/00
39837632150,1sleep10-21swapper/11
38263382151,6sleep03826351-21ssh0
367978999151,2cyclictest0-21swapper/33
367978999151,12cyclictest0-21swapper/33
367978999150,3cyclictest0-21swapper/33
367978999150,12cyclictest0-21swapper/33
41611152141,3sleep13810887-21diskmemload1
41410382141,7sleep23810887-21diskmemload2
41192562141,3sleep20-21swapper/22
41061512140,3sleep20-21swapper/22
40925172141,8sleep04092738-21hddtemp_smartct0
39946922141,2sleep10-21swapper/11
39589982141,4sleep03959012-21ssh0
39404682141,9sleep23810887-21diskmemload2
38801362141,6sleep20-21swapper/22
37042862140,1sleep00-21swapper/00
367978999147,4cyclictest3800005-21chrt3
3679789991412,1cyclictest0-21swapper/33
3679789991411,2cyclictest0-21swapper/33
3679789991411,1cyclictest0-21swapper/33
41327252131,8sleep04132732-21ssh0
41315022131,6sleep24131556-21ntpq2
40375012131,8sleep04037515-21ssh0
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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