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2026-05-14 - 00:35

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 May 13, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41510032143123,11sleep10-21swapper/11
4151050212955,69sleep30-21swapper/33
5735721140,3sleep1321rcuc/11
414661928558,14sleep20-21swapper/22
415100227956,18sleep00-21swapper/00
415146099286,14cyclictest0-21swapper/33
415146099271,23cyclictest0-21swapper/33
415146099271,14cyclictest0-21swapper/33
415146099241,3cyclictest0-21swapper/33
415146099241,3cyclictest0-21swapper/33
415146099241,2cyclictest0-21swapper/33
415146099241,2cyclictest0-21swapper/33
415146099240,2cyclictest0-21swapper/33
415146099240,2cyclictest0-21swapper/33
415146099231,3cyclictest0-21swapper/33
415146099231,15cyclictest0-21swapper/33
415146099230,2cyclictest0-21swapper/33
415146099230,2cyclictest0-21swapper/33
415146099224,2cyclictest0-21swapper/33
415146099224,2cyclictest0-21swapper/33
415146099221,2cyclictest0-21swapper/33
415146099221,2cyclictest0-21swapper/33
415146099220,2cyclictest0-21swapper/33
415146099220,20cyclictest0-21swapper/33
4255172211,10sleep1425524-21ssh1
415146099211,15cyclictest88804-21turbostat3
415146099210,2cyclictest0-21swapper/33
415146099210,2cyclictest0-21swapper/33
415146099210,2cyclictest0-21swapper/33
415146099201,16cyclictest0-21swapper/33
415146099201,15cyclictest66950irq/132-enp1s0-TxRx-33
415146099201,15cyclictest0-21swapper/33
415146099201,15cyclictest0-21swapper/33
415146099201,15cyclictest0-21swapper/33
415146099201,15cyclictest0-21swapper/33
415146099201,15cyclictest0-21swapper/33
415146099201,15cyclictest0-21swapper/33
415146099201,15cyclictest0-21swapper/33
415146099201,10cyclictest0-21swapper/33
415146099200,18cyclictest0-21swapper/33
415146099193,10cyclictest66950irq/132-enp1s0-TxRx-33
415146099191,7cyclictest72413-21turbostat3
4151460991913,4cyclictest0-21swapper/33
415146099191,15cyclictest0-21swapper/33
415146099191,15cyclictest0-21swapper/33
415146099191,14cyclictest0-21swapper/33
415146099191,14cyclictest0-21swapper/33
415146099191,13cyclictest0-21swapper/33
415146099190,11cyclictest0-21swapper/33
2133382191,7sleep088785-21diskmemload0
1972722191,13sleep088785-21diskmemload0
1048632191,9sleep2104874-21ssh2
415146099187,8cyclictest34808-21turbostat3
415146099183,12cyclictest66950irq/132-enp1s0-TxRx-33
415146099181,7cyclictest77770-21turbostat3
4151460991812,4cyclictest164331-21taskset3
415146099181,14cyclictest0-21swapper/33
415146099181,14cyclictest0-21swapper/33
415146099181,14cyclictest0-21swapper/33
415146099181,14cyclictest0-21swapper/33
415146099181,13cyclictest83337-21taskset3
960292171,10sleep20-21swapper/22
4196872171,3sleep00-21swapper/00
415146099178,2cyclictest0-21swapper/33
415146099171,13cyclictest0-21swapper/33
415146099170,9cyclictest0-21swapper/33
415146099170,14cyclictest0-21swapper/33
3421042170,1sleep10-21swapper/11
2241612172,11sleep1224201-21perf1
1209592171,6sleep088785-21diskmemload0
1209592171,6sleep088785-21diskmemload0
1201032171,3sleep20-21swapper/22
1201032171,3sleep20-21swapper/22
64952160,2sleep20-21swapper/22
4151460991611,3cyclictest0-21swapper/33
415146099161,13cyclictest0-21swapper/33
415146099161,12cyclictest50860-21sleep3
415146099161,12cyclictest0-21swapper/33
415146099161,12cyclictest0-21swapper/33
415146099160,13cyclictest0-21swapper/33
415146099160,13cyclictest0-21swapper/33
415146099160,13cyclictest0-21swapper/33
415146099160,12cyclictest0-21swapper/33
415146099160,12cyclictest0-21swapper/33
3747442165,2sleep2171rcu_preempt2
3667922161,4sleep288785-21diskmemload2
1551892161,2sleep20-21swapper/22
1403392161,7sleep2140558-21hddtemp_smartct2
1144622161,2sleep10-21swapper/11
1144622161,2sleep10-21swapper/11
1060982161,3sleep20-21swapper/22
4151460991512,2cyclictest0-21swapper/33
415146099150,13cyclictest0-21swapper/33
3935012151,2sleep10-21swapper/11
3679792151,5sleep10-21swapper/11
3597122151,2sleep00-21swapper/00
3311842151,9sleep0331244-21ntpq0
3236542150,1sleep20-21swapper/22
3176472151,8sleep072-21kcompactd00
3070072151,4sleep288785-21diskmemload2
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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