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2026-08-04 - 23:22

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 all highest latencies:
System rack3slot3s.osadl.org (updated Tue Aug 04, 2026 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
488353212161,55sleep30-21swapper/33
488353212161,55sleep30-21swapper/33
48832728668,12sleep20-21swapper/22
48832728668,12sleep20-21swapper/22
48801228660,7sleep00-21swapper/00
48801228660,7sleep00-21swapper/00
48811128152,11sleep10-21swapper/11
48811128152,11sleep10-21swapper/11
7376172281,2sleep20-21swapper/22
8085532221,16sleep0808820-21df0
48853499221,17cyclictest0-21swapper/33
488534992117,2cyclictest0-21swapper/33
48853499211,16cyclictest0-21swapper/33
8404402202,8sleep2616491-21diskmemload2
8317342201,8sleep0616491-21diskmemload0
48853499202,13cyclictest730058-21chrt3
48853499201,6cyclictest6683512sleep33
48853499201,16cyclictest0-21swapper/33
48853499201,15cyclictest0-21swapper/33
48853499201,15cyclictest0-21swapper/33
48853499201,14cyclictest0-21swapper/33
48853499200,17cyclictest0-21swapper/33
48853499193,11cyclictest885918-21taskset3
48853499192,14cyclictest66950irq/132-enp1s0-TxRx-33
488534991912,5cyclictest0-21swapper/33
488534991912,4cyclictest0-21swapper/33
488534991911,6cyclictest0-21swapper/33
48853499191,15cyclictest0-21swapper/33
48853499191,15cyclictest0-21swapper/33
48853499191,15cyclictest0-21swapper/33
48853499191,14cyclictest0-21swapper/33
48853499191,14cyclictest0-21swapper/33
48853499191,14cyclictest0-21swapper/33
48853499191,14cyclictest0-21swapper/33
48853499191,14cyclictest0-21swapper/33
48853499191,14cyclictest0-21swapper/33
48853499190,15cyclictest0-21swapper/33
6948092181,12sleep2694855-21cat2
48853499181,14cyclictest0-21swapper/33
48853499181,14cyclictest0-21swapper/33
48853499181,14cyclictest0-21swapper/33
48853499181,14cyclictest0-21swapper/33
48853499181,14cyclictest0-21swapper/33
48853499181,14cyclictest0-21swapper/33
48853499181,13cyclictest0-21swapper/33
48853499181,13cyclictest0-21swapper/33
48853499181,13cyclictest0-21swapper/33
48853499180,16cyclictest0-21swapper/33
48853499180,15cyclictest0-21swapper/33
48853499180,14cyclictest0-21swapper/33
48853499180,14cyclictest0-21swapper/33
8674042171,8sleep10-21swapper/11
7561462171,4sleep1616491-21diskmemload1
7262992171,5sleep0726313-21ssh0
48853499172,11cyclictest629181-21taskset3
488534991712,3cyclictest66950irq/132-enp1s0-TxRx-33
48853499171,13cyclictest720972-21turbostat3
48853499171,13cyclictest0-21swapper/33
48853499170,15cyclictest0-21swapper/33
48853499170,14cyclictest0-21swapper/33
48853499170,14cyclictest0-21swapper/33
48853499170,13cyclictest0-21swapper/33
48853499170,13cyclictest0-21swapper/33
48853499170,13cyclictest0-21swapper/33
9445192161,2sleep10-21swapper/11
8915382161,5sleep1891549-21ssh1
8784272165,7sleep139542-21systemd-journal1
7697222161,3sleep00-21swapper/00
7609812161,4sleep0616491-21diskmemload0
5473252161,11sleep1547413-21ps1
48853499162,10cyclictest511737-21chrt3
48853499161,12cyclictest0-21swapper/33
488534991610,4cyclictest0-21swapper/33
48853499160,13cyclictest0-21swapper/33
48853499160,13cyclictest0-21swapper/33
9377832151,3sleep20-21swapper/22
7035812151,10sleep2703818-21packagekitd2
5753052151,6sleep2576692-21grep2
48853499158,4cyclictest4887312chrt3
488534991512,2cyclictest0-21swapper/33
488534991512,1cyclictest0-21swapper/33
48853499150,13cyclictest0-21swapper/33
48853499150,12cyclictest0-21swapper/33
48853499150,12cyclictest0-21swapper/33
48853499150,12cyclictest0-21swapper/33
8953642141,2sleep00-21swapper/00
8607722142,6sleep0861039-21df0
8427712140,2sleep00-21swapper/00
7929782141,9sleep20-21swapper/22
7008212145,5sleep0151ktimers/00
6680072141,8sleep0616491-21diskmemload0
6598562141,9sleep1616491-21diskmemload1
6486072141,3sleep00-21swapper/00
6345842141,3sleep0634682-21tune2fs0
48853499141,11cyclictest5322242sleep33
48853499140,2cyclictest0-21swapper/33
48853499140,12cyclictest0-21swapper/33
48853499140,11cyclictest0-21swapper/33
9723472131,5sleep10-21swapper/11
9379692131,8sleep0937982-21ssh0
9114192131,8sleep0911430-21ssh0
8934052131,3sleep0893416-21ssh0
8760362131,3sleep0876047-21ssh0
8652122131,6sleep2616491-21diskmemload2
8592632130,3sleep0616491-21diskmemload0
8235452131,3sleep1823556-21ssh1
6410812137,2sleep20-21swapper/22
5741202130,1sleep20-21swapper/22
48853499136,3cyclictest0-21swapper/33
488534991310,2cyclictest0-21swapper/33
9540142120,7sleep1616491-21diskmemload1
9295652121,7sleep0929572-21ssh0
9205662121,6sleep0616491-21diskmemload0
9030572121,7sleep1903067-21ssh1
8823282121,7sleep0882438-21wc0
8754992121,5sleep20-21swapper/22
8694192121,7sleep1869421-21ssh1
8573482121,6sleep20-21swapper/22
8491902120,3sleep0849201-21ssh0
8241752121,2sleep20-21swapper/22
8124712121,7sleep2812637-21grep2
8066782120,6sleep10-21swapper/11
8046772122,4sleep0616491-21diskmemload0
7968792120,5sleep10-21swapper/11
7817602121,7sleep0781769-21sh0
7778812121,3sleep2778019-21systemctl2
7721322121,7sleep1772147-21ssh1
7563672121,6sleep2756499-21diskstats2
7393462121,6sleep0739986-21grep0
7354422121,5sleep00-21swapper/00
7290092121,7sleep2729023-21ssh2
6637542120,3sleep2663755-21kthreadcore2
6234272127,2sleep10-21swapper/11
5537622121,5sleep2553781-21apt-get2
5485122121,6sleep244-21ksoftirqd/22
5031532124,3sleep2504911-21grep2
9799602111,4sleep1616491-21diskmemload1
9727482111,6sleep0616491-21diskmemload0
9621202111,3sleep10-21swapper/11
9535162110,2sleep20-21swapper/22
9184792111,4sleep10-21swapper/11
9018842112,4sleep2616491-21diskmemload2
8483862110,7sleep2848399-21ssh2
8432912111,6sleep1843305-21ssh1
8259262110,4sleep2825939-21ssh2
8225182111,6sleep0822530-21ssh0
8049992111,7sleep2805012-21rm2
7993272111,6sleep0799342-21ssh0
7458712111,6sleep1745886-21sh1
7431422110,5sleep20-21swapper/22
7282732114,2sleep10-21swapper/11
7177252110,2sleep00-21swapper/00
7171902111,4sleep1717386-21users1
7100392110,5sleep00-21swapper/00
7018582111,4sleep2616491-21diskmemload2
6834342111,6sleep2616491-21diskmemload2
6750072111,3sleep20-21swapper/22
6733172110,4sleep10-21swapper/11
6605642111,5sleep1660728-21diskstats1
6584812111,3sleep20-21swapper/22
6169042111,4sleep2616926-21apt-get2
6009912111,5sleep2601251-21df_inode2
6009902111,5sleep1600987-21apt-get1
5219502111,5sleep0522031-21munin-run0
5166752111,5sleep1516731-21munin-run1
4987032111,5sleep0499847-21memory0
9737232101,3sleep0616491-21diskmemload0
9736962101,3sleep2616491-21diskmemload2
9699712101,3sleep20-21swapper/22
9634602100,4sleep20-21swapper/22
9624242101,4sleep0616491-21diskmemload0
9447062101,2sleep00-21swapper/00
9438132100,1sleep20-21swapper/22
9300782100,2sleep1171rcu_preempt1
9291962101,4sleep10-21swapper/11
9202752101,3sleep20-21swapper/22
9044912101,6sleep20-21swapper/22
8942572101,2sleep20-21swapper/22
8583042100,1sleep10-21swapper/11
8412022101,3sleep1616491-21diskmemload1
7898912101,2sleep00-21swapper/00
7875002100,1sleep20-21swapper/22
7722452101,3sleep2616491-21diskmemload2
7535432101,2sleep20-21swapper/22
7485702101,5sleep0750144-21tr0
7194452101,3sleep20-21swapper/22
7032302100,1sleep10-21swapper/11
6926932101,3sleep00-21swapper/00
6917862102,4sleep1584781-21kworker/u16:3+xprtiod1
6857822101,4sleep1616491-21diskmemload1
6737182101,5sleep0673913-21users0
6480032101,3sleep1616491-21diskmemload1
6321152100,5sleep0616491-21diskmemload0
6307592100,1sleep20-21swapper/22
6304472101,4sleep1616491-21diskmemload1
6228002100,4sleep00-21swapper/00
5962392101,5sleep10-21swapper/11
5910232100,1sleep00-21swapper/00
5695102101,4sleep1569768-21df_inode1
5630812101,5sleep2563219-21tr2
5589962100,5sleep00-21swapper/00
5478562100,4sleep0221rcuc/00
5064842101,4sleep0506486-21apt-get0
5012322101,2sleep00-21swapper/00
947665292,3sleep04192558-21rs:main0
928486291,2sleep20-21swapper/22
883386291,4sleep2883400-21sh2
832155291,3sleep1616491-21diskmemload1
813757291,2sleep10-21swapper/11
787695290,2sleep10-21swapper/11
777804290,1sleep10-21swapper/11
752647291,2sleep10-21swapper/11
736931290,3sleep10-21swapper/11
703895291,4sleep1703914-21ssh1
685256291,3sleep0616491-21diskmemload0
651671291,4sleep0651685-21ssh0
642679291,3sleep2616491-21diskmemload2
634205291,3sleep14192558-21rs:main1
613669291,4sleep1615348-21cat1
606399291,4sleep1606523-21diskstats1
601356291,4sleep0600969-21/usr/sbin/munin0
579984291,2sleep00-21swapper/00
575023291,4sleep0575232-21hddtemp_smartct0
564546291,4sleep2564024-21sendmail-msp2
557969291,4sleep1558165-21wc1
542984291,4sleep01-21systemd0
538047291,2sleep10-21swapper/11
522242290,1sleep20-21swapper/22
516972290,5sleep2517108-21tr2
506489291,4sleep1506746-21df1
505927290,1sleep10-21swapper/11
911226281,2sleep10-21swapper/11
606524281,3sleep2606232-21/usr/sbin/munin2
600000280,4sleep0600234-21sed0
589991280,2sleep20-21swapper/22
585248281,3sleep0585505-21/usr/sbin/munin0
570048280,5sleep0570788-21kthreadcore0
555577281,3sleep0557255-21grep0
548492281,3sleep1548511-21apt-get1
538652281,3sleep2540171-21cut2
536799281,3sleep1536858-21/usr/sbin/munin1
529401281,3sleep2531154-21kthreadcore2
528114281,3sleep10-21swapper/11
516950281,2sleep10-21swapper/11
511716280,2sleep20-21swapper/22
495987281,2sleep20-21swapper/22
488726280,3sleep2488728-21apt-get2
615844270,4sleep20-21swapper/22
606806271,2sleep00-21swapper/00
595146270,1sleep10-21swapper/11
579351270,1sleep10-21swapper/11
568868270,1sleep10-21swapper/11
563651270,1sleep10-21swapper/11
543561270,2sleep2543050-21sendmail-msp2
532778270,2sleep00-21swapper/00
527540270,2sleep00-21swapper/00
511394270,1sleep20-21swapper/22
493573270,1sleep10-21swapper/11
611549260,2sleep00-21swapper/00
595438260,4sleep20-21swapper/22
589894260,4sleep10-21swapper/11
580684260,2sleep10-21swapper/11
564279261,2sleep00-21swapper/00
548774261,2sleep00-21swapper/00
522240260,2sleep00-21swapper/00
600369250,1sleep20-21swapper/22
580243251,1sleep20-21swapper/22
532801250,1sleep20-21swapper/22
522032250,1sleep10-21swapper/11
515893250,1sleep00-21swapper/00
500364250,1sleep10-21swapper/11
491567250,1sleep00-21swapper/00
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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