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2026-05-11 - 21:06

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 Mon May 11, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3628442212249,68sleep30-21swapper/33
362843628151,11sleep20-21swapper/22
362837728150,12sleep10-21swapper/11
362849827852,18sleep00-21swapper/00
39317242220,2sleep00-21swapper/00
362879899221,7cyclictest3854650-21taskset3
362879899211,14cyclictest0-21swapper/33
362879899210,19cyclictest0-21swapper/33
41062472200,3sleep10-21swapper/11
362879899209,7cyclictest3929990-21chrt3
3628798992011,7cyclictest0-21swapper/33
362879899201,16cyclictest3944681-21chrt3
362879899201,15cyclictest0-21swapper/33
36524602191,7sleep13652529-21date1
362879899192,13cyclictest0-21swapper/33
3628798991914,3cyclictest0-21swapper/33
362879899191,15cyclictest0-21swapper/33
362879899191,15cyclictest0-21swapper/33
362879899191,14cyclictest0-21swapper/33
362879899191,14cyclictest0-21swapper/33
362879899191,14cyclictest0-21swapper/33
362879899191,14cyclictest0-21swapper/33
362879899191,14cyclictest0-21swapper/33
362879899191,14cyclictest0-21swapper/33
362879899191,14cyclictest0-21swapper/33
362879899191,14cyclictest0-21swapper/33
362879899190,2cyclictest0-21swapper/33
39553182181,14sleep13955588-21rm1
362879899181,5cyclictest0-21swapper/33
3628798991811,4cyclictest4078454-21chrt3
362879899181,14cyclictest3893823-21chrt3
362879899181,14cyclictest0-21swapper/33
362879899181,14cyclictest0-21swapper/33
362879899181,14cyclictest0-21swapper/33
362879899181,14cyclictest0-21swapper/33
362879899181,14cyclictest0-21swapper/33
362879899181,14cyclictest0-21swapper/33
362879899181,14cyclictest0-21swapper/33
362879899181,14cyclictest0-21swapper/33
362879899181,13cyclictest0-21swapper/33
362879899181,13cyclictest0-21swapper/33
362879899180,16cyclictest0-21swapper/33
362879899180,15cyclictest66950irq/132-enp1s0-TxRx-33
362879899180,14cyclictest0-21swapper/33
3628798991713,2cyclictest0-21swapper/33
3628798991713,2cyclictest0-21swapper/33
3628798991712,3cyclictest3700890-21turbostat3
362879899171,13cyclictest0-21swapper/33
362879899171,13cyclictest0-21swapper/33
362879899171,13cyclictest0-21swapper/33
362879899171,13cyclictest0-21swapper/33
362879899171,13cyclictest0-21swapper/33
362879899171,13cyclictest0-21swapper/33
362879899171,13cyclictest0-21swapper/33
362879899170,14cyclictest0-21swapper/33
362879899170,14cyclictest0-21swapper/33
362879899170,14cyclictest0-21swapper/33
362879899170,13cyclictest0-21swapper/33
362879899170,13cyclictest0-21swapper/33
38273042161,4sleep23827319-21ssh2
3628798991612,3cyclictest0-21swapper/33
3628798991612,2cyclictest0-21swapper/33
40888662150,1sleep00-21swapper/00
40397402151,2sleep10-21swapper/11
40058382150,1sleep00-21swapper/00
38597782150,3sleep00-21swapper/00
38268722151,10sleep13826876-21ssh1
37670532151,2sleep00-21swapper/00
36729412151,10sleep13672959-21/usr/sbin/munin1
362879899151,3cyclictest0-21swapper/33
3628798991512,1cyclictest0-21swapper/33
3628798991511,2cyclictest0-21swapper/33
362879899150,13cyclictest0-21swapper/33
362879899150,12cyclictest3668858-21chrt3
362879899150,12cyclictest0-21swapper/33
362879899150,12cyclictest0-21swapper/33
40384702141,7sleep23760129-21diskmemload2
40235902141,5sleep24024047-21kthreadcore2
40207902141,6sleep13760129-21diskmemload1
40121872140,2sleep20-21swapper/22
39886772141,6sleep23988690-21ssh2
39272442140,1sleep20-21swapper/22
38699762141,8sleep03760129-21diskmemload0
38536132141,2sleep20-21swapper/22
38194632141,9sleep23819477-21ssh2
362879899148,3cyclictest36467322sleep33
362879899141,9cyclictest3727516-21taskset3
362879899140,12cyclictest0-21swapper/33
362879899140,11cyclictest0-21swapper/33
40885782131,2sleep20-21swapper/22
40464152131,8sleep04046429-21ssh0
40208562130,2sleep20-21swapper/22
38923972131,3sleep10-21swapper/11
38805932131,8sleep23882184-21kthreadcore2
38622292131,7sleep13760129-21diskmemload1
38524472131,2sleep10-21swapper/11
38413342131,8sleep23841482-21netstat2
37679552131,8sleep23767969-21ssh2
37381612130,1sleep10-21swapper/11
37118182131,8sleep23712074-21df2
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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