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2026-06-17 - 03:32

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 Wed Jun 17, 2026 00:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4060465212654,67sleep30-21swapper/33
406018428557,9sleep10-21swapper/11
406042628453,12sleep20-21swapper/22
406022128351,7sleep00-21swapper/00
1285652270,2sleep00-21swapper/00
406060999223,13cyclictest170013-21taskset3
406060999216,12cyclictest0-21swapper/33
406060999210,16cyclictest66950irq/132-enp1s0-TxRx-33
2471762210,2sleep00-21swapper/00
4060609992016,2cyclictest0-21swapper/33
406060999201,16cyclictest0-21swapper/33
406060999201,16cyclictest0-21swapper/33
406060999201,15cyclictest4065559-21taskset3
406060999201,15cyclictest0-21swapper/33
406060999201,14cyclictest0-21swapper/33
406060999200,7cyclictest4120758-21taskset3
41468182191,5sleep04146859-21ntpq0
4060609991915,2cyclictest0-21swapper/33
4060609991912,5cyclictest0-21swapper/33
406060999191,15cyclictest0-21swapper/33
406060999191,15cyclictest0-21swapper/33
406060999191,14cyclictest66950irq/132-enp1s0-TxRx-33
406060999191,14cyclictest0-21swapper/33
406060999191,14cyclictest0-21swapper/33
406060999191,14cyclictest0-21swapper/33
406060999191,14cyclictest0-21swapper/33
406060999191,14cyclictest0-21swapper/33
406060999191,14cyclictest0-21swapper/33
406060999181,14cyclictest0-21swapper/33
406060999181,14cyclictest0-21swapper/33
406060999181,14cyclictest0-21swapper/33
406060999181,14cyclictest0-21swapper/33
406060999181,14cyclictest0-21swapper/33
406060999181,14cyclictest0-21swapper/33
406060999181,14cyclictest0-21swapper/33
406060999181,14cyclictest0-21swapper/33
406060999181,13cyclictest0-21swapper/33
406060999181,13cyclictest0-21swapper/33
406060999181,13cyclictest0-21swapper/33
406060999181,13cyclictest0-21swapper/33
406060999181,13cyclictest0-21swapper/33
406060999181,13cyclictest0-21swapper/33
406060999180,15cyclictest0-21swapper/33
406060999180,15cyclictest0-21swapper/33
406060999180,15cyclictest0-21swapper/33
406060999180,14cyclictest0-21swapper/33
406060999180,14cyclictest0-21swapper/33
406060999180,14cyclictest0-21swapper/33
406060999180,14cyclictest0-21swapper/33
1973962181,3sleep10-21swapper/11
4060609991711,3cyclictest0-21swapper/33
406060999171,13cyclictest0-21swapper/33
406060999171,13cyclictest0-21swapper/33
406060999171,12cyclictest0-21swapper/33
406060999170,14cyclictest0-21swapper/33
406060999170,14cyclictest0-21swapper/33
406060999170,14cyclictest0-21swapper/33
406060999170,13cyclictest0-21swapper/33
2574352171,3sleep00-21swapper/00
2294112171,5sleep04190461-21diskmemload0
207062171,3sleep10-21swapper/11
207062171,3sleep10-21swapper/11
1797972171,5sleep24190461-21diskmemload2
538092161,2sleep20-21swapper/22
406060999161,4cyclictest86523-21taskset3
406060999161,3cyclictest0-21swapper/33
4060609991613,1cyclictest0-21swapper/33
4060609991611,3cyclictest0-21swapper/33
406060999161,11cyclictest0-21swapper/33
406060999160,13cyclictest0-21swapper/33
406060999160,13cyclictest0-21swapper/33
406060999160,13cyclictest0-21swapper/33
406060999160,13cyclictest0-21swapper/33
367962160,3sleep10-21swapper/11
3075902161,2sleep00-21swapper/00
1978302161,3sleep20-21swapper/22
1031862160,3sleep10-21swapper/11
558162151,3sleep14190461-21diskmemload1
4060609991512,2cyclictest0-21swapper/33
4060609991512,2cyclictest0-21swapper/33
406060999150,13cyclictest0-21swapper/33
406060999150,13cyclictest0-21swapper/33
2973772151,3sleep04190461-21diskmemload0
2973772151,3sleep04190461-21diskmemload0
2885472151,3sleep04190461-21diskmemload0
2300502151,2sleep20-21swapper/22
1903552150,1sleep10-21swapper/11
1815542151,8sleep172-21kcompactd01
1541412151,2sleep20-21swapper/22
125592151,2sleep10-21swapper/11
982762141,2sleep20-21swapper/22
97912141,8sleep09855-21ntpq0
41328492141,9sleep14134516-21cut1
406060999148,3cyclictest41848712sleep33
406060999147,4cyclictest41580822sleep33
4060609991412,1cyclictest0-21swapper/33
406060999140,2cyclictest0-21swapper/33
406060999140,2cyclictest0-21swapper/33
406060999140,2cyclictest0-21swapper/33
406060999140,12cyclictest0-21swapper/33
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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