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2026-07-05 - 06:18

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 376 highest latencies:
System rack3slot3s.osadl.org (updated Sun Jul 05, 2026 00:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
101542723260,2sleep01008108-40find0
599412212662,58sleep30-21swapper/33
59954028770,11sleep20-21swapper/22
59950928654,12sleep10-21swapper/11
59936427555,14sleep00-21swapper/00
10498522300,2sleep0221rcuc/00
59969499231,18cyclictest0-21swapper/33
599694992310,9cyclictest884061-21turbostat3
59969499215,3cyclictest800296-21taskset3
59969499215,3cyclictest800296-21taskset3
599694992111,6cyclictest825816-21taskset3
59969499211,16cyclictest0-21swapper/33
59969499211,16cyclictest0-21swapper/33
599694992012,5cyclictest0-21swapper/33
59969499201,16cyclictest0-21swapper/33
59969499201,15cyclictest0-21swapper/33
59969499201,14cyclictest0-21swapper/33
59969499198,8cyclictest964936-21chrt3
59969499191,15cyclictest66950irq/132-enp1s0-TxRx-33
599694991911,5cyclictest0-21swapper/33
59969499191,15cyclictest0-21swapper/33
59969499191,15cyclictest0-21swapper/33
59969499191,14cyclictest0-21swapper/33
59969499191,14cyclictest0-21swapper/33
59969499190,17cyclictest0-21swapper/33
59969499190,16cyclictest66950irq/132-enp1s0-TxRx-33
599694991811,4cyclictest0-21swapper/33
59969499181,14cyclictest0-21swapper/33
59969499181,14cyclictest0-21swapper/33
59969499181,14cyclictest0-21swapper/33
59969499181,14cyclictest0-21swapper/33
59969499181,14cyclictest0-21swapper/33
59969499181,13cyclictest0-21swapper/33
59969499181,13cyclictest0-21swapper/33
59969499181,13cyclictest0-21swapper/33
59969499181,13cyclictest0-21swapper/33
59969499180,15cyclictest66950irq/132-enp1s0-TxRx-33
59969499180,14cyclictest0-21swapper/33
59969499180,14cyclictest0-21swapper/33
59969499180,14cyclictest0-21swapper/33
10050092181,6sleep11005019-21ssh1
9242282171,4sleep0727371-21diskmemload0
8919412171,4sleep2891955-21ssh2
8358072171,4sleep0836446-21kthreadcore0
8331642171,3sleep10-21swapper/11
7836982171,4sleep0783710-21ssh0
7491022175,2sleep0727371-21diskmemload0
59969499176,8cyclictest722139-21turbostat3
59969499171,13cyclictest0-21swapper/33
59969499170,15cyclictest0-21swapper/33
59969499170,14cyclictest8739432sleep33
59969499170,14cyclictest0-21swapper/33
59969499170,14cyclictest0-21swapper/33
59969499170,14cyclictest0-21swapper/33
59969499170,13cyclictest0-21swapper/33
59969499170,13cyclictest0-21swapper/33
59969499170,13cyclictest0-21swapper/33
9882492161,4sleep1727371-21diskmemload1
9635582160,3sleep20-21swapper/22
9571992160,1sleep10-21swapper/11
8346012161,2sleep00-21swapper/00
7526162162,9sleep2752621-21apt-get2
6742902161,3sleep00-21swapper/00
59969499166,8cyclictest648799-21turbostat3
59969499166,8cyclictest648799-21turbostat3
599694991612,3cyclictest0-21swapper/33
599694991612,2cyclictest0-21swapper/33
599694991612,2cyclictest0-21swapper/33
59969499161,13cyclictest0-21swapper/33
59969499161,13cyclictest0-21swapper/33
59969499161,12cyclictest0-21swapper/33
59969499160,14cyclictest0-21swapper/33
59969499160,13cyclictest0-21swapper/33
59969499160,13cyclictest0-21swapper/33
59969499160,12cyclictest0-21swapper/33
10167782161,11sleep2727371-21diskmemload2
8567632151,9sleep0856773-21ssh0
8395222157,4sleep20-21swapper/22
8167882151,2sleep10-21swapper/11
8167882151,2sleep10-21swapper/11
8080322151,2sleep00-21swapper/00
8080322151,2sleep00-21swapper/00
6695742151,6sleep20-21swapper/22
6277542150,1sleep00-21swapper/00
59969499151,3cyclictest0-21swapper/33
59969499151,12cyclictest0-21swapper/33
59969499150,2cyclictest0-21swapper/33
59969499150,12cyclictest0-21swapper/33
9390822141,8sleep0727371-21diskmemload0
8508262140,10sleep2727371-21diskmemload2
8236602140,2sleep10-21swapper/11
7991602141,9sleep1799171-21ssh1
7991602141,9sleep1799171-21ssh1
7355282141,2sleep10-21swapper/11
59969499148,4cyclictest721934-21chrt3
59969499148,3cyclictest680269-21chrt3
59969499148,3cyclictest6224972sleep33
59969499147,4cyclictest617337-21chrt3
59969499140,2cyclictest0-21swapper/33
59969499140,12cyclictest0-21swapper/33
59969499140,12cyclictest0-21swapper/33
59969499140,12cyclictest0-21swapper/33
59969499140,11cyclictest0-21swapper/33
9976602131,8sleep1997674-21ssh1
9965522131,8sleep2996563-21ssh2
9340692131,5sleep1934094-21ssh1
9147572131,8sleep0914758-21sh0
8738702130,2sleep10-21swapper/11
8656202131,3sleep0865632-21ssh0
8592672131,2sleep20-21swapper/22
8491522131,3sleep1849166-21ssh1
8416732131,6sleep10-21swapper/11
7998682131,2sleep0799879-21ssh0
7998682131,2sleep0799879-21ssh0
7910142131,8sleep1791028-21ssh1
6753392131,8sleep2675483-21/usr/sbin/munin2
599694991311,1cyclictest0-21swapper/33
10730412131,4sleep01073051-21ssh0
10497892131,7sleep2727371-21diskmemload2
10054802131,3sleep21005491-21ssh2
9829062120,1sleep00-21swapper/00
9488602122,4sleep2727371-21diskmemload2
9317882121,5sleep20-21swapper/22
9092062120,2sleep1205-21jbd2/sda2-81
9065352121,6sleep00-21swapper/00
59969499126,4cyclictest643802-21chrt3
10751192121,4sleep20-21swapper/22
10659282121,7sleep11065938-21ssh1
10491032121,6sleep1727371-21diskmemload1
10241622121,3sleep11024167-21ssh1
9911892111,6sleep0991200-21ssh0
9657662111,4sleep10-21swapper/11
9472562111,5sleep0727371-21diskmemload0
9401892110,2sleep20-21swapper/22
9235572111,7sleep2923570-21sh2
9176202110,7sleep1917631-21sh1
8983992111,3sleep20-21swapper/22
8899912111,3sleep10-21swapper/11
8897012111,5sleep0727371-21diskmemload0
8817022111,4sleep00-21swapper/00
8763752111,5sleep1876379-21apt-get1
8434362111,3sleep00-21swapper/00
8093252110,2sleep10-21swapper/11
8093252110,2sleep10-21swapper/11
7904732111,3sleep00-21swapper/00
7803982111,5sleep2781390-21memory2
7767602111,5sleep2727371-21diskmemload2
7587612111,5sleep10-21swapper/11
7509992111,3sleep20-21swapper/22
7363792111,5sleep2736595-21hddtemp_smartct2
7351472111,6sleep2735160-21ssh2
6595842111,5sleep0659587-21apt-get0
6543352111,4sleep1654354-21apt-get1
6543352111,4sleep1654354-21apt-get1
6480072111,6sleep2648175-21/usr/sbin/munin2
6438352112,4sleep0643831-21apt-get0
10759542111,3sleep10-21swapper/11
10518372111,4sleep01051861-21apt-get0
10397232111,6sleep21039972-21sed2
10354012111,5sleep01035629-21df_inode0
10257112111,3sleep20-21swapper/22
10083862111,6sleep10-21swapper/11
9968652101,4sleep0727371-21diskmemload0
9886492101,3sleep20-21swapper/22
9800822101,4sleep2727371-21diskmemload2
9743382100,1sleep10-21swapper/11
9660392101,5sleep0727371-21diskmemload0
9583102101,5sleep2958317-21sh2
9555822101,3sleep00-21swapper/00
9483252101,3sleep10-21swapper/11
9259262101,4sleep1926051-21diskstats1
9163392103,1sleep20-21swapper/22
9009182101,6sleep2900953-21ssh2
8822472100,1sleep20-21swapper/22
8749682101,4sleep0727371-21diskmemload0
8682262101,3sleep20-21swapper/22
8650332101,5sleep10-21swapper/11
8599862101,4sleep2727371-21diskmemload2
8249632101,3sleep20-21swapper/22
8178012101,5sleep0817812-21ssh0
8178012101,5sleep0817812-21ssh0
8157752101,4sleep2815789-21ssh2
8157752101,4sleep2815789-21ssh2
8072582100,1sleep20-21swapper/22
8072582100,1sleep20-21swapper/22
8002562101,4sleep2727371-21diskmemload2
8002562101,4sleep2727371-21diskmemload2
7751592101,3sleep00-21swapper/00
7675372100,1sleep10-21swapper/11
7656652101,3sleep00-21swapper/00
7600292101,3sleep00-21swapper/00
7424922101,2sleep00-21swapper/00
7375172100,2sleep10-21swapper/11
6962462101,4sleep0696248-21apt-get0
6909872101,4sleep1690990-21apt-get1
6549092101,5sleep20-21swapper/22
6549092101,5sleep20-21swapper/22
6176392101,5sleep1617779-21tr1
6079832101,5sleep0609582-21kthreadcore0
10671222101,3sleep20-21swapper/22
10598882100,4sleep01059923-21ssh0
10324712101,4sleep21032479-21ssh2
10322222100,1sleep10-21swapper/11
975080291,2sleep10-21swapper/11
973175290,1sleep00-21swapper/00
972148291,3sleep20-21swapper/22
932747291,2sleep00-21swapper/00
906919291,3sleep1727371-21diskmemload1
897398291,4sleep0897412-21ssh0
892623291,5sleep1892633-21ssh1
857474291,3sleep1727371-21diskmemload1
832852291,4sleep2832865-21ssh2
825314291,4sleep0825328-21ssh0
792122291,3sleep2727371-21diskmemload2
777265291,2sleep10-21swapper/11
774383291,4sleep1774394-21ssh1
765729291,4sleep2727371-21diskmemload2
749221291,4sleep1749233-21ssh1
734308291,2sleep00-21swapper/00
686290291,4sleep1686859-21grep1
670621291,4sleep2670659-21kthreadcore2
633052290,4sleep21-21systemd2
631853290,1sleep10-21swapper/11
622580291,4sleep01-21systemd0
619465291,4sleep2621206-21tr2
603965291,4sleep0604072-21processes0
1056561291,1sleep20-21swapper/22
1051798291,2sleep10-21swapper/11
1040994290,1sleep10-21swapper/11
1031748291,3sleep0727371-21diskmemload0
1023752291,4sleep01023766-21ssh0
1005279290,2sleep00-21swapper/00
727041280,1sleep10-21swapper/11
726473281,3sleep043602-21gdbus0
722388280,2sleep20-21swapper/22
716110281,3sleep2716300-21cat2
711341280,1sleep10-21swapper/11
702032281,3sleep0703062-21kthreadcore0
692051281,3sleep2693691-21kthreadcore2
690699280,1sleep00-21swapper/00
681151281,3sleep0682632-21kthreadcore0
678967280,4sleep0679302-21strings0
675305282,2sleep10-21swapper/11
659846281,3sleep2659893-21fschecks_count2
654041281,3sleep2654107-21sendmail-msp2
654041281,3sleep2654107-21sendmail-msp2
648488280,4sleep10-21swapper/11
640491280,4sleep20-21swapper/22
638579280,2sleep00-21swapper/00
633928280,4sleep2635357-21cut2
630097283,2sleep00-21swapper/00
612425280,2sleep20-21swapper/22
722016270,1sleep10-21swapper/11
721873270,1sleep20-21swapper/22
717168270,2sleep00-21swapper/00
716799270,1sleep10-21swapper/11
713392270,3sleep0715086-21cut0
706425270,1sleep00-21swapper/00
700433270,4sleep20-21swapper/22
696219271,2sleep10-21swapper/11
695564270,1sleep00-21swapper/00
690594270,1sleep20-21swapper/22
684329270,2sleep2684486-21strings2
670054270,2sleep10-21swapper/11
669552270,1sleep00-21swapper/00
665675271,3sleep1667288-21kthreadcore1
659241270,1sleep00-21swapper/00
659241270,1sleep00-21swapper/00
649677270,3sleep0651260-21grep0
649677270,3sleep0651260-21grep0
638309271,3sleep1638412-21wc1
627741270,1sleep20-21swapper/22
612396271,2sleep10-21swapper/11
612395271,2sleep00-21swapper/00
611976270,5sleep10-21swapper/11
611834270,1sleep20-21swapper/22
599864271,2sleep2599883-21apt-get2
705725261,1sleep20-21swapper/22
701193260,2sleep10-21swapper/11
660581261,2sleep10-21swapper/11
651261261,2sleep10-21swapper/11
651261261,2sleep10-21swapper/11
638601261,2sleep10-21swapper/11
637124260,2sleep0637331-21strings0
623424260,2sleep10-21swapper/11
711028250,1sleep20-21swapper/22
680278251,1sleep10-21swapper/11
604521250,3sleep10-21swapper/11
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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