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2026-05-24 - 21:55

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 Sun May 24, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
112274121270,3sleep1321rcuc/11
903452211853,60sleep30-21swapper/33
90338829073,11sleep20-21swapper/22
90337629070,14sleep00-21swapper/00
90329827959,16sleep10-21swapper/11
903607992411,10cyclictest1375654-21turbostat3
903607992211,8cyclictest0-21swapper/33
12956212221,16sleep11034284-21diskmemload1
90360799211,7cyclictest1304422-21taskset3
90360799211,16cyclictest66950irq/132-enp1s0-TxRx-33
90360799210,19cyclictest0-21swapper/33
13232732211,14sleep11323304-21ssh1
11359042211,6sleep01034284-21diskmemload0
90360799206,12cyclictest0-21swapper/33
90360799202,4cyclictest1173190-21taskset3
903607992016,2cyclictest0-21swapper/33
903607992016,2cyclictest0-21swapper/33
90360799201,15cyclictest66950irq/132-enp1s0-TxRx-33
903607992010,6cyclictest1191513-21taskset3
90360799191,15cyclictest0-21swapper/33
90360799191,15cyclictest0-21swapper/33
90360799191,14cyclictest66950irq/132-enp1s0-TxRx-33
90360799191,14cyclictest1267821-21taskset3
90360799191,14cyclictest0-21swapper/33
90360799191,14cyclictest0-21swapper/33
90360799191,14cyclictest0-21swapper/33
90360799191,14cyclictest0-21swapper/33
90360799190,17cyclictest0-21swapper/33
90360799190,15cyclictest0-21swapper/33
90360799189,6cyclictest1401858-21turbostat3
90360799187,8cyclictest959648-21turbostat3
90360799184,11cyclictest0-21swapper/33
903607991812,4cyclictest66950irq/132-enp1s0-TxRx-33
90360799181,15cyclictest0-21swapper/33
90360799181,14cyclictest970254-21taskset3
90360799181,14cyclictest0-21swapper/33
90360799181,14cyclictest0-21swapper/33
90360799181,14cyclictest0-21swapper/33
90360799181,13cyclictest0-21swapper/33
90360799181,13cyclictest0-21swapper/33
90360799181,13cyclictest0-21swapper/33
90360799180,15cyclictest66950irq/132-enp1s0-TxRx-33
90360799180,14cyclictest0-21swapper/33
90360799180,14cyclictest0-21swapper/33
13458462181,6sleep21034284-21diskmemload2
90360799174,9cyclictest0-21swapper/33
90360799171,4cyclictest0-21swapper/33
90360799171,4cyclictest0-21swapper/33
903607991714,2cyclictest0-21swapper/33
90360799171,14cyclictest0-21swapper/33
90360799171,13cyclictest0-21swapper/33
90360799171,13cyclictest0-21swapper/33
90360799171,13cyclictest0-21swapper/33
90360799171,13cyclictest0-21swapper/33
90360799171,13cyclictest0-21swapper/33
90360799170,15cyclictest0-21swapper/33
90360799170,14cyclictest0-21swapper/33
12504662171,4sleep21034284-21diskmemload2
12155082170,1sleep00-21swapper/00
11366332170,1sleep10-21swapper/11
90360799161,12cyclictest0-21swapper/33
90360799161,12cyclictest0-21swapper/33
90360799160,13cyclictest0-21swapper/33
90360799160,13cyclictest0-21swapper/33
90360799160,13cyclictest0-21swapper/33
90360799160,13cyclictest0-21swapper/33
90360799160,13cyclictest0-21swapper/33
90360799160,13cyclictest0-21swapper/33
13462812161,2sleep00-21swapper/00
13112232161,4sleep01034284-21diskmemload0
13054252161,11sleep01-21systemd0
11623462161,3sleep00-21swapper/00
9652452151,4sleep2965264-21apt-get2
9348432151,6sleep2936642-21cut2
90360799156,6cyclictest1002334-21sleep3
90360799150,13cyclictest0-21swapper/33
90360799150,12cyclictest0-21swapper/33
90360799150,12cyclictest0-21swapper/33
90360799150,12cyclictest0-21swapper/33
14010152151,8sleep11034284-21diskmemload1
13564582151,7sleep00-21swapper/00
13462472151,2sleep10-21swapper/11
13364742150,3sleep2421rcuc/22
12312922151,9sleep11231349-21ntpq1
11809102151,4sleep01034284-21diskmemload0
11545382151,3sleep01154551-21ssh0
11101742151,9sleep00-21swapper/00
11001722151,10sleep11100222-21ntpq1
10835552151,3sleep00-21swapper/00
10238812151,3sleep10-21swapper/11
903607991411,2cyclictest0-21swapper/33
90360799141,11cyclictest0-21swapper/33
90360799141,10cyclictest980952-21taskset3
90360799140,12cyclictest0-21swapper/33
90360799140,12cyclictest0-21swapper/33
90360799140,11cyclictest0-21swapper/33
13869032141,9sleep21388659-21tr2
13029262140,10sleep11034284-21diskmemload1
12786482141,8sleep00-21swapper/00
12705572141,2sleep10-21swapper/11
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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