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2026-07-02 - 09:46

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 Thu Jul 02, 2026 00:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
192234921330,2sleep01922351-21tr0
1898624212062,54sleep30-21swapper/33
1898624212062,54sleep30-21swapper/33
189878328655,10sleep10-21swapper/11
189878328655,10sleep10-21swapper/11
189865828466,12sleep20-21swapper/22
189865828466,12sleep20-21swapper/22
189862127652,7sleep00-21swapper/00
189862127652,7sleep00-21swapper/00
189904299221,7cyclictest2343035-21taskset3
189904299211,16cyclictest2308444-21taskset3
189904299211,15cyclictest0-21swapper/33
189904299211,15cyclictest0-21swapper/33
189904299211,15cyclictest0-21swapper/33
1899042992110,7cyclictest1927187-21turbostat3
1899042992011,7cyclictest2026298-21chrt3
189904299201,15cyclictest0-21swapper/33
20927242191,8sleep12092738-21ssh1
189904299197,9cyclictest1904211-21turbostat3
1899042991916,1cyclictest0-21swapper/33
1899042991916,1cyclictest0-21swapper/33
1899042991912,5cyclictest0-21swapper/33
189904299191,15cyclictest0-21swapper/33
189904299191,15cyclictest0-21swapper/33
189904299191,15cyclictest0-21swapper/33
189904299191,14cyclictest0-21swapper/33
189904299191,14cyclictest0-21swapper/33
189904299191,14cyclictest0-21swapper/33
189904299191,14cyclictest0-21swapper/33
189904299191,14cyclictest0-21swapper/33
189904299191,14cyclictest0-21swapper/33
189904299191,13cyclictest2210912-21taskset3
189904299191,13cyclictest0-21swapper/33
189904299190,17cyclictest0-21swapper/33
23532972181,12sleep12026605-21diskmemload1
23071612181,3sleep10-21swapper/11
20433012181,11sleep02043346-21munin-run0
1899042991811,4cyclictest0-21swapper/33
189904299181,14cyclictest0-21swapper/33
189904299181,14cyclictest0-21swapper/33
189904299181,14cyclictest0-21swapper/33
189904299181,14cyclictest0-21swapper/33
189904299181,14cyclictest0-21swapper/33
189904299181,14cyclictest0-21swapper/33
189904299181,14cyclictest0-21swapper/33
189904299181,14cyclictest0-21swapper/33
189904299181,14cyclictest0-21swapper/33
189904299181,14cyclictest0-21swapper/33
189904299181,14cyclictest0-21swapper/33
189904299181,14cyclictest0-21swapper/33
189904299181,14cyclictest0-21swapper/33
189904299181,14cyclictest0-21swapper/33
189904299181,14cyclictest0-21swapper/33
189904299181,13cyclictest0-21swapper/33
189904299181,13cyclictest0-21swapper/33
189904299181,13cyclictest0-21swapper/33
189904299181,13cyclictest0-21swapper/33
189904299180,14cyclictest66950irq/132-enp1s0-TxRx-33
189904299180,14cyclictest66950irq/132-enp1s0-TxRx-33
22927442171,3sleep00-21swapper/00
20681472171,5sleep02026605-21diskmemload0
20425812170,2sleep20-21swapper/22
189904299171,13cyclictest0-21swapper/33
189904299171,13cyclictest0-21swapper/33
189904299171,13cyclictest0-21swapper/33
189904299170,14cyclictest0-21swapper/33
189904299170,14cyclictest0-21swapper/33
189904299170,14cyclictest0-21swapper/33
189904299170,13cyclictest0-21swapper/33
189904299170,13cyclictest0-21swapper/33
189904299170,13cyclictest0-21swapper/33
189904299170,12cyclictest0-21swapper/33
23506542161,1sleep20-21swapper/22
21508182161,2sleep20-21swapper/22
21414112160,1sleep20-21swapper/22
20847722161,2sleep20-21swapper/22
20339372161,2sleep20-21swapper/22
189904299161,3cyclictest0-21swapper/33
189904299161,11cyclictest0-21swapper/33
189904299160,14cyclictest0-21swapper/33
189904299160,13cyclictest0-21swapper/33
23332632150,3sleep12333262-21sshd-session1
23013202151,3sleep12026605-21diskmemload1
22024992151,6sleep12202767-21df_inode1
21833602150,1sleep00-21swapper/00
21661572151,2sleep10-21swapper/11
21055222150,2sleep20-21swapper/22
189904299150,12cyclictest0-21swapper/33
189904299150,11cyclictest0-21swapper/33
23671792141,2sleep10-21swapper/11
23084782141,9sleep22026605-21diskmemload2
22163392144,4sleep1331ktimers/11
21996232141,1sleep10-21swapper/11
21833312141,8sleep12026605-21diskmemload1
21744302141,8sleep12174442-21ssh1
21239872141,9sleep02124001-21ssh0
20581712140,1sleep00-21swapper/00
20479962141,9sleep02048151-21wc0
19489622141,9sleep21949791-21tr2
189904299141,3cyclictest0-21swapper/33
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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