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2026-05-02 - 11:53

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 May 02, 2026 00:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
74473212262,56sleep30-21swapper/33
37243221100,2sleep20-21swapper/22
7436828971,12sleep20-21swapper/22
7459428357,17sleep00-21swapper/00
7446627960,12sleep10-21swapper/11
2865832310,1sleep172-21kcompactd01
7472599231,19cyclictest287645-21chrt3
5178762230,7sleep0204862-21diskmemload0
74725992017,1cyclictest0-21swapper/33
74725992015,3cyclictest0-21swapper/33
74725992012,4cyclictest0-21swapper/33
7472599201,15cyclictest66950irq/132-enp1s0-TxRx-33
7472599201,15cyclictest66950irq/132-enp1s0-TxRx-33
7472599201,15cyclictest0-21swapper/33
7472599201,15cyclictest0-21swapper/33
74725992010,7cyclictest0-21swapper/33
7472599200,17cyclictest0-21swapper/33
74725991916,1cyclictest0-21swapper/33
74725991913,3cyclictest5602782sleep33
74725991911,6cyclictest0-21swapper/33
7472599191,15cyclictest66950irq/132-enp1s0-TxRx-33
7472599191,15cyclictest0-21swapper/33
74725991911,4cyclictest66950irq/132-enp1s0-TxRx-33
7472599190,16cyclictest66950irq/132-enp1s0-TxRx-33
7472599183,13cyclictest0-21swapper/33
7472599181,5cyclictest0-21swapper/33
74725991814,3cyclictest66950irq/132-enp1s0-TxRx-33
74725991812,4cyclictest0-21swapper/33
74725991812,3cyclictest0-21swapper/33
7472599181,14cyclictest66950irq/132-enp1s0-TxRx-33
7472599181,14cyclictest0-21swapper/33
7472599181,14cyclictest0-21swapper/33
7472599181,14cyclictest0-21swapper/33
7472599181,14cyclictest0-21swapper/33
7472599181,14cyclictest0-21swapper/33
7472599181,13cyclictest0-21swapper/33
7472599181,13cyclictest0-21swapper/33
7472599181,13cyclictest0-21swapper/33
7472599181,13cyclictest0-21swapper/33
7472599181,13cyclictest0-21swapper/33
7472599181,13cyclictest0-21swapper/33
7472599180,15cyclictest0-21swapper/33
7472599180,14cyclictest0-21swapper/33
7472599180,14cyclictest0-21swapper/33
74725991714,1cyclictest0-21swapper/33
74725991714,1cyclictest0-21swapper/33
7472599171,14cyclictest0-21swapper/33
7472599171,13cyclictest0-21swapper/33
7472599171,12cyclictest0-21swapper/33
7472599170,14cyclictest0-21swapper/33
7472599170,14cyclictest0-21swapper/33
7472599170,13cyclictest0-21swapper/33
7472599170,13cyclictest0-21swapper/33
5612212171,3sleep00-21swapper/00
4993192171,3sleep10-21swapper/11
3539692171,3sleep10-21swapper/11
2622992171,3sleep20-21swapper/22
7472599168,4cyclictest917042sleep33
7472599161,9cyclictest1302852sleep33
74725991611,3cyclictest0-21swapper/33
7472599161,13cyclictest0-21swapper/33
7472599160,14cyclictest0-21swapper/33
7472599160,13cyclictest0-21swapper/33
7472599160,13cyclictest0-21swapper/33
7472599160,13cyclictest0-21swapper/33
7472599160,13cyclictest0-21swapper/33
7472599160,13cyclictest0-21swapper/33
7472599160,12cyclictest0-21swapper/33
5498992160,12sleep0204862-21diskmemload0
5440422161,3sleep00-21swapper/00
5336822161,3sleep10-21swapper/11
5336822161,3sleep10-21swapper/11
5250032161,3sleep00-21swapper/00
4845492161,3sleep1204862-21diskmemload1
4323072161,4sleep2204862-21diskmemload2
3642622161,3sleep10-21swapper/11
2287142161,4sleep2204862-21diskmemload2
7472599150,13cyclictest0-21swapper/33
7472599150,13cyclictest0-21swapper/33
7472599150,12cyclictest0-21swapper/33
5589732150,3sleep20-21swapper/22
4062672151,8sleep0204862-21diskmemload0
2546422151,9sleep2204862-21diskmemload2
2433512151,10sleep0243468-21sh0
967142140,3sleep30-21swapper/33
74725991412,1cyclictest0-21swapper/33
74725991411,2cyclictest0-21swapper/33
74725991411,2cyclictest0-21swapper/33
74725991411,1cyclictest0-21swapper/33
7472599140,2cyclictest0-21swapper/33
7472599140,10cyclictest0-21swapper/33
5589112141,2sleep10-21swapper/11
4662232140,2sleep10-21swapper/11
4406302141,2sleep20-21swapper/22
3040092141,9sleep0204862-21diskmemload0
2794332141,3sleep1204862-21diskmemload1
2648222141,9sleep1264832-21ssh1
2538662141,8sleep0204862-21diskmemload0
7472599131,9cyclictest183302-21turbostat3
5496772130,2sleep10-21swapper/11
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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