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2026-05-19 - 18:12

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 May 19, 2026 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1573875211953,60sleep30-21swapper/33
156938328154,14sleep00-21swapper/00
156958628055,15sleep10-21swapper/11
157430227659,12sleep20-21swapper/22
18928312220,2sleep30-21swapper/33
157471599221,17cyclictest2042984-21taskset3
157471599220,20cyclictest0-21swapper/33
157471599211,17cyclictest66950irq/132-enp1s0-TxRx-33
157471599210,19cyclictest0-21swapper/33
18312722201,8sleep01831286-21ssh0
157471599201,16cyclictest1923755-21taskset3
157471599200,17cyclictest0-21swapper/33
20452292191,7sleep22045520-21grep2
19927732191,13sleep01705735-21diskmemload0
157471599197,9cyclictest1764919-21turbostat3
1574715991912,5cyclictest0-21swapper/33
157471599191,15cyclictest66950irq/132-enp1s0-TxRx-33
157471599191,15cyclictest0-21swapper/33
157471599191,15cyclictest0-21swapper/33
157471599191,15cyclictest0-21swapper/33
157471599191,14cyclictest66950irq/132-enp1s0-TxRx-33
157471599191,14cyclictest0-21swapper/33
157471599191,14cyclictest0-21swapper/33
157471599191,14cyclictest0-21swapper/33
1574715991910,6cyclictest1966167-21taskset3
18571962181,3sleep00-21swapper/00
157471599189,6cyclictest66950irq/132-enp1s0-TxRx-33
157471599189,4cyclictest18247662sleep33
157471599181,5cyclictest0-21swapper/33
157471599181,15cyclictest66950irq/132-enp1s0-TxRx-33
157471599181,15cyclictest0-21swapper/33
157471599181,14cyclictest0-21swapper/33
157471599181,14cyclictest0-21swapper/33
157471599181,13cyclictest1838355-21taskset3
157471599181,13cyclictest0-21swapper/33
157471599181,13cyclictest0-21swapper/33
1574715991810,6cyclictest0-21swapper/33
157471599180,15cyclictest0-21swapper/33
157471599180,15cyclictest0-21swapper/33
157471599180,15cyclictest0-21swapper/33
157471599180,14cyclictest0-21swapper/33
157471599178,6cyclictest1636138-21turbostat3
157471599178,6cyclictest1636138-21turbostat3
1574715991713,2cyclictest0-21swapper/33
1574715991712,3cyclictest1748514-21taskset3
1574715991711,4cyclictest0-21swapper/33
157471599171,13cyclictest0-21swapper/33
157471599171,13cyclictest0-21swapper/33
157471599171,13cyclictest0-21swapper/33
157471599171,13cyclictest0-21swapper/33
157471599171,12cyclictest1619860-21taskset3
157471599170,14cyclictest0-21swapper/33
20012262161,3sleep20-21swapper/22
19522462161,8sleep11952379-21diskstats1
19167542161,4sleep10-21swapper/11
18551472161,4sleep11705735-21diskmemload1
17628892161,2sleep10-21swapper/11
17281982169,3sleep11705735-21diskmemload1
157471599164,1cyclictest0-21swapper/33
1574715991612,3cyclictest0-21swapper/33
1574715991612,3cyclictest0-21swapper/33
157471599161,13cyclictest0-21swapper/33
157471599161,12cyclictest0-21swapper/33
157471599160,13cyclictest0-21swapper/33
157471599160,13cyclictest0-21swapper/33
157471599160,13cyclictest0-21swapper/33
157471599160,13cyclictest0-21swapper/33
157471599160,13cyclictest0-21swapper/33
157471599160,13cyclictest0-21swapper/33
157471599160,13cyclictest0-21swapper/33
157471599160,13cyclictest0-21swapper/33
157471599160,13cyclictest0-21swapper/33
157471599160,13cyclictest0-21swapper/33
157471599160,12cyclictest0-21swapper/33
20235682151,9sleep22023625-21ntpq2
20003162151,3sleep01705735-21diskmemload0
19752442151,4sleep01975255-21ssh0
19577122151,2sleep20-21swapper/22
19492872150,1sleep00-21swapper/00
19435892151,4sleep11705735-21diskmemload1
17442482152,6sleep21744302-21ntpq2
17400342152,8sleep11740060-21apt-get1
17271862153,6sleep21727235-21ntpq2
1574715991512,2cyclictest0-21swapper/33
157471599150,14cyclictest0-21swapper/33
157471599150,13cyclictest0-21swapper/33
157471599150,12cyclictest0-21swapper/33
20536172141,9sleep12053699-21sh1
19252302141,8sleep11705735-21diskmemload1
18911312141,8sleep11705735-21diskmemload1
18051082141,2sleep20-21swapper/22
17814012141,8sleep21705735-21diskmemload2
17225162141,8sleep01705735-21diskmemload0
17186342141,7sleep11718695-21ntpq1
17138812141,4sleep11713893-21ssh1
17116152141,2sleep20-21swapper/22
16727012141,2sleep10-21swapper/11
16101222141,3sleep11610238-21irqstats1
157471599140,2cyclictest0-21swapper/33
157471599140,12cyclictest0-21swapper/33
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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