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2026-06-29 - 09:18

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 Mon Jun 29, 2026 00:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3163236211859,53sleep30-21swapper/33
316328328667,12sleep20-21swapper/22
316355928153,7sleep00-21swapper/00
316329228153,9sleep10-21swapper/11
3163785992511,10cyclictest3606498-21turbostat3
316378599229,9cyclictest3422715-21turbostat3
316378599212,14cyclictest33323852sleep33
3163785992110,7cyclictest3530106-21turbostat3
316378599201,15cyclictest0-21swapper/33
316378599201,15cyclictest0-21swapper/33
316378599201,15cyclictest0-21swapper/33
316378599192,14cyclictest66950irq/132-enp1s0-TxRx-33
316378599191,7cyclictest3356439-21taskset3
3163785991916,2cyclictest0-21swapper/33
3163785991916,1cyclictest0-21swapper/33
316378599191,14cyclictest66950irq/132-enp1s0-TxRx-33
316378599191,14cyclictest3259389-21taskset3
3163785991911,4cyclictest0-21swapper/33
316378599191,14cyclictest0-21swapper/33
3163785991910,2cyclictest0-21swapper/33
35712572181,5sleep13571618-21grep1
34962932180,8sleep20-21swapper/22
34068232181,5sleep23407043-21hddtemp_smartct2
316378599189,6cyclictest3538426-21turbostat3
316378599182,13cyclictest3623094-21turbostat3
3163785991811,4cyclictest0-21swapper/33
316378599181,14cyclictest0-21swapper/33
316378599181,14cyclictest0-21swapper/33
316378599181,14cyclictest0-21swapper/33
316378599181,14cyclictest0-21swapper/33
316378599181,14cyclictest0-21swapper/33
316378599181,14cyclictest0-21swapper/33
316378599181,13cyclictest3228258-21turbostat3
316378599181,13cyclictest3228258-21turbostat3
316378599180,16cyclictest0-21swapper/33
35299712171,3sleep10-21swapper/11
34561492172,8sleep13456413-21df1
34425592170,5sleep13442560-21kthreadcore1
34303622171,2sleep00-21swapper/00
33892062171,5sleep03290777-21diskmemload0
33163942171,10sleep23317067-21cut2
316378599178,6cyclictest3480373-21turbostat3
316378599175,9cyclictest3421976-21taskset3
316378599171,5cyclictest0-21swapper/33
316378599171,5cyclictest0-21swapper/33
316378599171,13cyclictest0-21swapper/33
316378599171,13cyclictest0-21swapper/33
316378599171,13cyclictest0-21swapper/33
316378599171,13cyclictest0-21swapper/33
316378599171,13cyclictest0-21swapper/33
316378599171,13cyclictest0-21swapper/33
316378599171,13cyclictest0-21swapper/33
316378599171,13cyclictest0-21swapper/33
316378599171,13cyclictest0-21swapper/33
316378599171,13cyclictest0-21swapper/33
316378599171,13cyclictest0-21swapper/33
316378599171,13cyclictest0-21swapper/33
316378599171,13cyclictest0-21swapper/33
316378599170,14cyclictest0-21swapper/33
36212932162,2sleep20-21swapper/22
35201622161,2sleep00-21swapper/00
34958032161,10sleep03290777-21diskmemload0
33376272161,3sleep20-21swapper/22
32997032161,4sleep23299919-21hddtemp_smartct2
31721592167,4sleep13173800-21cut1
3163785991614,1cyclictest0-21swapper/33
316378599161,3cyclictest0-21swapper/33
316378599161,12cyclictest0-21swapper/33
316378599161,12cyclictest0-21swapper/33
316378599161,12cyclictest0-21swapper/33
316378599161,12cyclictest0-21swapper/33
316378599160,13cyclictest0-21swapper/33
316378599160,12cyclictest0-21swapper/33
36056272151,10sleep03290777-21diskmemload0
35682692150,2sleep10-21swapper/11
34395872151,2sleep20-21swapper/22
316378599151,2cyclictest0-21swapper/33
316378599151,11cyclictest3290794-21sleep3
316378599151,10cyclictest3202517-21chrt3
316378599150,13cyclictest0-21swapper/33
316378599150,13cyclictest0-21swapper/33
35696022147,3sleep23569613-21ssh2
35270122143,6sleep03163780-21cyclictest0
34877052141,7sleep20-21swapper/22
33464812141,8sleep13346491-21ssh1
33070212141,2sleep10-21swapper/11
32911772141,6sleep03291212-21ssh0
316378599147,3cyclictest0-21swapper/33
316378599141,2cyclictest0-21swapper/33
3163785991411,2cyclictest0-21swapper/33
316378599140,12cyclictest0-21swapper/33
316378599140,11cyclictest0-21swapper/33
35978902131,8sleep23597900-21ssh2
35716192131,8sleep23571433-40find2
35454592131,7sleep03290777-21diskmemload0
35055892131,7sleep23290777-21diskmemload2
34854752131,8sleep13485485-21ssh1
34203272131,8sleep23420341-21ssh2
34050512131,3sleep03405063-21ssh0
33813402131,4sleep13381352-21ssh1
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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