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2026-03-23 - 18:12

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 Mar 23, 2026 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
606151211656,55sleep30-21swapper/33
60631828555,11sleep10-21swapper/11
60617328158,6sleep00-21swapper/00
60565128061,11sleep20-21swapper/22
8157342340,2sleep10-21swapper/11
606547992318,3cyclictest0-21swapper/33
60654799231,18cyclictest0-21swapper/33
606547992213,6cyclictest9820832sleep33
60654799221,17cyclictest0-21swapper/33
8878372219,8sleep2889486-21tr2
60654799211,3cyclictest0-21swapper/33
60654799211,16cyclictest743042-21taskset3
8838602200,2sleep20-21swapper/22
60654799201,7cyclictest989857-21taskset3
60654799201,16cyclictest0-21swapper/33
60654799201,15cyclictest0-21swapper/33
60654799201,15cyclictest0-21swapper/33
60654799200,18cyclictest0-21swapper/33
60654799191,5cyclictest769846-21taskset3
60654799191,15cyclictest0-21swapper/33
60654799191,15cyclictest0-21swapper/33
60654799191,15cyclictest0-21swapper/33
60654799191,15cyclictest0-21swapper/33
60654799191,15cyclictest0-21swapper/33
60654799191,14cyclictest66950irq/132-enp1s0-TxRx-33
60654799191,14cyclictest0-21swapper/33
60654799191,14cyclictest0-21swapper/33
60654799191,14cyclictest0-21swapper/33
60654799191,14cyclictest0-21swapper/33
60654799191,14cyclictest0-21swapper/33
7815742181,12sleep2781215-21/usr/sbin/munin2
606547991812,4cyclictest720764-21chrt3
60654799181,14cyclictest0-21swapper/33
60654799181,14cyclictest0-21swapper/33
60654799181,14cyclictest0-21swapper/33
60654799181,14cyclictest0-21swapper/33
60654799181,14cyclictest0-21swapper/33
60654799181,14cyclictest0-21swapper/33
60654799181,14cyclictest0-21swapper/33
60654799181,14cyclictest0-21swapper/33
60654799181,14cyclictest0-21swapper/33
60654799181,14cyclictest0-21swapper/33
60654799181,14cyclictest0-21swapper/33
60654799181,14cyclictest0-21swapper/33
60654799181,14cyclictest0-21swapper/33
60654799181,14cyclictest0-21swapper/33
60654799181,13cyclictest705056-21turbostat3
60654799181,13cyclictest0-21swapper/33
60654799180,14cyclictest0-21swapper/33
10846092181,3sleep00-21swapper/00
10233392180,9sleep1736922-21diskmemload1
10185392181,13sleep01018790-21cut0
9549242171,12sleep1954935-21ssh1
8381382171,10sleep1838195-21ntpq1
7438782171,4sleep1736922-21diskmemload1
6942762170,1sleep10-21swapper/11
606547991715,1cyclictest0-21swapper/33
606547991715,1cyclictest0-21swapper/33
60654799171,14cyclictest0-21swapper/33
606547991711,3cyclictest0-21swapper/33
60654799171,13cyclictest0-21swapper/33
60654799171,13cyclictest0-21swapper/33
9957452161,9sleep1995837-21ntpq1
8650662161,4sleep2736922-21diskmemload2
8071892161,2sleep00-21swapper/00
8061792161,2sleep10-21swapper/11
7767362160,7sleep10-21swapper/11
60654799161,13cyclictest0-21swapper/33
60654799161,12cyclictest0-21swapper/33
60654799161,12cyclictest0-21swapper/33
60654799160,13cyclictest0-21swapper/33
10686542161,4sleep01068668-21ssh0
10322902162,9sleep1736922-21diskmemload1
10322902162,9sleep1736922-21diskmemload1
9898302150,1sleep10-21swapper/11
9885402151,9sleep0988551-21fwupd0
9170412151,7sleep0917101-21ntpq0
9033162151,4sleep2736922-21diskmemload2
60654799151,3cyclictest0-21swapper/33
606547991512,1cyclictest0-21swapper/33
60654799151,11cyclictest0-21swapper/33
60654799150,13cyclictest0-21swapper/33
60654799150,13cyclictest0-21swapper/33
60654799150,13cyclictest0-21swapper/33
60654799150,12cyclictest0-21swapper/33
60654799150,12cyclictest0-21swapper/33
60654799150,12cyclictest0-21swapper/33
60654799150,11cyclictest0-21swapper/33
10851842151,3sleep1736922-21diskmemload1
10534562151,10sleep10-21swapper/11
9902022141,9sleep2990216-21ssh2
8953272141,8sleep1736922-21diskmemload1
8940762141,2sleep00-21swapper/00
8669432142,8sleep1736922-21diskmemload1
8230992141,3sleep1736922-21diskmemload1
7807542141,8sleep2736922-21diskmemload2
7801312141,9sleep0780146-21ssh0
60654799149,2cyclictest0-21swapper/33
606547991411,2cyclictest0-21swapper/33
606547991410,2cyclictest0-21swapper/33
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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