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2026-04-25 - 19:39

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 Sat Apr 25, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
386532121210,2sleep00-21swapper/00
3652140211660,52sleep30-21swapper/33
365701628656,12sleep10-21swapper/11
365684328053,10sleep20-21swapper/22
365684127858,14sleep00-21swapper/00
365730999241,18cyclictest4020786-21taskset3
365730999210,18cyclictest0-21swapper/33
365730999202,4cyclictest38102692sleep33
365730999202,15cyclictest0-21swapper/33
3657309992017,1cyclictest0-21swapper/33
365730999201,15cyclictest0-21swapper/33
365730999201,15cyclictest0-21swapper/33
365730999199,5cyclictest40037902sleep33
365730999194,13cyclictest4057907-21taskset3
3657309991916,1cyclictest0-21swapper/33
365730999191,14cyclictest3917974-21taskset3
365730999191,14cyclictest3761531-21taskset3
365730999191,14cyclictest0-21swapper/33
365730999191,14cyclictest0-21swapper/33
365730999191,14cyclictest0-21swapper/33
365730999191,14cyclictest0-21swapper/33
365730999191,13cyclictest0-21swapper/33
365730999190,7cyclictest3831831-21taskset3
365730999190,17cyclictest0-21swapper/33
365730999190,16cyclictest0-21swapper/33
41205972181,5sleep24120971-21gpgv2
41189022181,7sleep03787920-21diskmemload0
39774862180,3sleep10-21swapper/11
365730999189,5cyclictest38190842sleep33
365730999185,11cyclictest3723742-21taskset3
365730999181,14cyclictest0-21swapper/33
365730999181,14cyclictest0-21swapper/33
365730999181,14cyclictest0-21swapper/33
365730999181,14cyclictest0-21swapper/33
365730999181,14cyclictest0-21swapper/33
365730999181,14cyclictest0-21swapper/33
365730999181,14cyclictest0-21swapper/33
365730999181,14cyclictest0-21swapper/33
365730999181,13cyclictest0-21swapper/33
365730999181,13cyclictest0-21swapper/33
365730999181,13cyclictest0-21swapper/33
365730999181,13cyclictest0-21swapper/33
365730999181,13cyclictest0-21swapper/33
365730999181,13cyclictest0-21swapper/33
3657309991810,5cyclictest3771714-21taskset3
365730999180,16cyclictest0-21swapper/33
365730999180,15cyclictest0-21swapper/33
38378102171,2sleep20-21swapper/22
365730999179,3cyclictest39269112sleep33
365730999178,6cyclictest3734613-21turbostat3
3657309991713,2cyclictest0-21swapper/33
365730999171,13cyclictest0-21swapper/33
365730999171,13cyclictest0-21swapper/33
365730999171,13cyclictest0-21swapper/33
365730999171,13cyclictest0-21swapper/33
365730999171,13cyclictest0-21swapper/33
365730999171,13cyclictest0-21swapper/33
365730999171,12cyclictest3685994-21taskset3
365730999170,14cyclictest0-21swapper/33
365730999170,14cyclictest0-21swapper/33
40999372161,2sleep00-21swapper/00
39539372161,3sleep10-21swapper/11
38925652160,3sleep00-21swapper/00
38819662161,2sleep20-21swapper/22
38737512161,4sleep03787920-21diskmemload0
365730999169,5cyclictest37721972sleep33
365730999161,2cyclictest0-21swapper/33
365730999161,13cyclictest0-21swapper/33
365730999160,4cyclictest3702435-21taskset3
365730999160,13cyclictest0-21swapper/33
365730999160,12cyclictest0-21swapper/33
41429352151,3sleep24142986-21ntpq2
41026842151,4sleep13787920-21diskmemload1
40748382151,9sleep04074850-21sh0
40666822151,11sleep20-21swapper/22
40056062151,8sleep20-21swapper/22
38102072151,9sleep23810267-21ntpq2
37549152151,4sleep23754961-21ntpq2
365730999154,8cyclictest3750616-21turbostat3
365730999151,12cyclictest3782828-21chrt3
3657309991511,2cyclictest0-21swapper/33
365730999150,13cyclictest0-21swapper/33
365730999150,12cyclictest0-21swapper/33
41367502140,3sleep23787920-21diskmemload2
40852922140,2sleep10-21swapper/11
40074752141,8sleep24007738-21ssh2
39527792145,4sleep2431ktimers/22
38468482140,2sleep10-21swapper/11
38035932141,8sleep23787920-21diskmemload2
37943552141,2sleep10-21swapper/11
37628612141,9sleep23764567-21grep2
365730999141,9cyclictest3665131-21chrt3
3657309991411,2cyclictest0-21swapper/33
3657309991411,2cyclictest0-21swapper/33
365730999140,13cyclictest0-21swapper/33
41543972131,8sleep24154411-21ssh2
41531772131,6sleep00-21swapper/00
41347952131,7sleep03787920-21diskmemload0
41136972131,4sleep14115349-21cut1
41105362131,8sleep04110547-21ssh0
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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