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2026-06-07 - 16:22

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 the highest latencies:
System rack3slot3s.osadl.org (updated Sun Jun 07, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
594223212661,58sleep30-21swapper/33
59427528355,7sleep00-21swapper/00
59424628353,11sleep10-21swapper/11
59440028252,11sleep20-21swapper/22
59457099310,29cyclictest0-21swapper/33
59457099291,25cyclictest0-21swapper/33
59457099255,3cyclictest0-21swapper/33
594570992522,2cyclictest0-21swapper/33
594570992522,2cyclictest0-21swapper/33
59457099240,2cyclictest0-21swapper/33
59457099240,2cyclictest0-21swapper/33
8531762231,9sleep0725610-21diskmemload0
7522542231,5sleep0752380-21irqstats0
59457099231,13cyclictest0-21swapper/33
594570992310,9cyclictest1040757-21sleep3
59457099230,2cyclictest0-21swapper/33
59457099230,2cyclictest0-21swapper/33
59457099230,2cyclictest0-21swapper/33
59457099221,18cyclictest0-21swapper/33
59457099221,17cyclictest783736-21chrt3
59457099220,2cyclictest0-21swapper/33
59457099220,2cyclictest0-21swapper/33
59457099220,12cyclictest0-21swapper/33
9642272211,3sleep00-21swapper/00
59457099215,13cyclictest617925-21turbostat3
594570992118,2cyclictest0-21swapper/33
59457099211,16cyclictest853069-21taskset3
59457099211,16cyclictest0-21swapper/33
59457099211,12cyclictest0-21swapper/33
59457099211,11cyclictest0-21swapper/33
59457099210,12cyclictest0-21swapper/33
59457099201,16cyclictest0-21swapper/33
59457099201,15cyclictest0-21swapper/33
59457099201,10cyclictest0-21swapper/33
59457099200,17cyclictest0-21swapper/33
8356152191,2sleep00-21swapper/00
7844812190,7sleep0151ktimers/00
7402142191,8sleep0725610-21diskmemload0
7402142191,8sleep0725610-21diskmemload0
59457099196,9cyclictest644787-21turbostat3
59457099191,6cyclictest677296-21taskset3
59457099191,15cyclictest0-21swapper/33
59457099191,15cyclictest0-21swapper/33
59457099191,15cyclictest0-21swapper/33
59457099191,15cyclictest0-21swapper/33
59457099191,14cyclictest0-21swapper/33
59457099191,14cyclictest0-21swapper/33
59457099191,14cyclictest0-21swapper/33
59457099191,14cyclictest0-21swapper/33
59457099191,14cyclictest0-21swapper/33
59457099191,10cyclictest0-21swapper/33
59457099190,12cyclictest0-21swapper/33
9901132181,7sleep20-21swapper/22
8358972181,8sleep1835907-21ssh1
8197252180,4sleep20-21swapper/22
594570991814,2cyclictest0-21swapper/33
59457099181,3cyclictest0-21swapper/33
59457099181,3cyclictest0-21swapper/33
59457099181,14cyclictest0-21swapper/33
59457099181,14cyclictest0-21swapper/33
59457099181,14cyclictest0-21swapper/33
59457099181,14cyclictest0-21swapper/33
59457099181,13cyclictest720051-21taskset3
59457099181,13cyclictest714706-21taskset3
59457099181,13cyclictest698361-21taskset3
59457099181,13cyclictest639426-21taskset3
59457099181,13cyclictest0-21swapper/33
594570991810,6cyclictest647683-21chrt3
9971602171,5sleep2725610-21diskmemload2
9555982171,5sleep1725610-21diskmemload1
8195592171,9sleep00-21swapper/00
59457099171,3cyclictest0-21swapper/33
59457099171,13cyclictest0-21swapper/33
59457099171,12cyclictest0-21swapper/33
59457099170,9cyclictest0-21swapper/33
9534202160,7sleep00-21swapper/00
9269732161,10sleep0927056-21open_inodes0
9029502167,5sleep1331ktimers/11
7985532161,10sleep0725610-21diskmemload0
7750422161,3sleep20-21swapper/22
7566422161,11sleep1725610-21diskmemload1
594570991611,3cyclictest0-21swapper/33
59457099161,13cyclictest0-21swapper/33
59457099160,13cyclictest0-21swapper/33
59457099160,13cyclictest0-21swapper/33
59457099160,13cyclictest0-21swapper/33
59457099160,13cyclictest0-21swapper/33
10474242160,4sleep20-21swapper/22
10077702161,4sleep01007986-21hddtemp_smartct0
9702032150,3sleep10-21swapper/11
9035812151,9sleep2725610-21diskmemload2
8707592151,2sleep20-21swapper/22
8274232155,2sleep0720084-21kworker/0:0+events0
7677912151,2sleep20-21swapper/22
7511212151,9sleep00-21swapper/00
6977022150,2sleep10-21swapper/11
6610032151,10sleep1661022-21apt-get1
6285122151,4sleep0628438-31find0
59457099151,9cyclictest594762-21taskset3
59457099151,10cyclictest0-21swapper/33
59457099150,13cyclictest0-21swapper/33
59457099150,13cyclictest0-21swapper/33
10672712151,5sleep21068707-21tr2
10305062151,3sleep00-21swapper/00
10218092151,2sleep20-21swapper/22
10164702151,11sleep00-21swapper/00
9794752141,3sleep1725610-21diskmemload1
9469372140,1sleep10-21swapper/11
9376782141,2sleep20-21swapper/22
9298762140,2sleep20-21swapper/22
9102012141,10sleep2910214-21ssh2
8780832140,2sleep10-21swapper/11
8768582145,5sleep0876870-21rm0
8341912141,2sleep20-21swapper/22
8166252141,9sleep1816815-21users1
6115922141,4sleep1611641-21open_files1
10411272141,9sleep11041143-21cpu1
10379342140,1sleep00-21swapper/00
10242652140,1sleep20-21swapper/22
9863292131,7sleep1986394-21ntpq1
9651552131,8sleep2965169-21ssh2
9398262131,7sleep0725610-21diskmemload0
9191162131,8sleep0919126-21ssh0
8695462131,8sleep0869553-21ssh0
8432622131,6sleep2725610-21diskmemload2
7901012131,6sleep2790199-21ntpq2
7740642135,1sleep0171rcu_preempt0
10538252131,6sleep01053884-21ntpq0
10389342131,7sleep1725610-21diskmemload1
10063452131,3sleep01006355-21ssh0
9110602121,6sleep0725610-21diskmemload0
9101882120,1sleep10-21swapper/11
8938132121,7sleep0893827-21ssh0
8927892121,5sleep20-21swapper/22
8853822121,7sleep0885394-21ssh0
8426812121,2sleep0171rcu_preempt0
8246622121,7sleep20-21swapper/22
8104322121,5sleep00-21swapper/00
8013072121,7sleep2801320-21ssh2
7777512121,5sleep1777974-21smartctl1
7609522121,6sleep10-21swapper/11
7493062121,6sleep2725610-21diskmemload2
6645712121,7sleep0665029-21cut0
6450342122,5sleep1645053-21apt-get1
6318572121,5sleep2632937-21memory2
6154742122,5sleep0616690-21memory0
10777942123,5sleep21079056-21grep2
10647532120,1sleep20-21swapper/22
10327882121,6sleep21032810-21apt-get2
9977642111,6sleep1997774-21ssh1
9884502111,3sleep00-21swapper/00
9637802111,5sleep20-21swapper/22
9452292110,1sleep20-21swapper/22
9391212110,4sleep1939132-21ssh1
9314802112,4sleep0931498-21apt-get0
9287382111,6sleep1725610-21diskmemload1
8964542111,6sleep00-21swapper/00
8432002111,2sleep1843210-21ssh1
8110082111,4sleep2725610-21diskmemload2
8033232111,7sleep10-21swapper/11
8019002111,4sleep1725610-21diskmemload1
7850452111,3sleep20-21swapper/22
7500292111,4sleep1725610-21diskmemload1
7397522111,2sleep10-21swapper/11
7397522111,2sleep10-21swapper/11
7158452111,6sleep0717504-21kthreadcore0
7045142112,4sleep2704533-21apt-get2
6976512111,5sleep0697700-21ntpq0
6284952111,4sleep1628438-31find1
6115382111,6sleep0611591-21modprobe0
10793062111,5sleep11079362-21ntpq1
10745582111,3sleep10-21swapper/11
10578902111,5sleep11057917-21apt1
10463632110,4sleep00-21swapper/00
10219372111,5sleep1725610-21diskmemload1
9993012101,4sleep1999522-21hddtemp_smartct1
9804432101,3sleep00-21swapper/00
9787772101,2sleep20-21swapper/22
9610762101,4sleep1961132-21ntp_states1
9533372101,3sleep20-21swapper/22
9190842101,3sleep1725610-21diskmemload1
8859852101,3sleep2725610-21diskmemload2
8857312101,3sleep1725610-21diskmemload1
8765912101,2sleep20-21swapper/22
8630542102,4sleep1725610-21diskmemload1
8585352101,3sleep20-21swapper/22
8513772101,4sleep1725610-21diskmemload1
8498642101,5sleep2849963-21ntpq2
7919642101,4sleep0725610-21diskmemload0
7745122101,4sleep1725610-21diskmemload1
7660012101,4sleep0725610-21diskmemload0
7590742101,3sleep20-21swapper/22
7313732101,4sleep0725610-21diskmemload0
7074252101,4sleep0708442-21memory0
7031522101,4sleep2703241-21ntpq2
6927112100,4sleep10-21swapper/11
6816402100,6sleep2681666-21grep2
6770222100,4sleep10-21swapper/11
6770222100,4sleep10-21swapper/11
6724802101,5sleep0672556-21kernelversion0
6724802101,5sleep0672556-21kernelversion0
6650882100,5sleep2665131-21ntpq2
6528452100,2sleep10-21swapper/11
6459922101,5sleep2647681-21kthreadcore2
6290092101,4sleep0629028-21apt-get0
6181872101,4sleep2618439-21df2
6021212101,4sleep1602140-21apt-get1
5998372100,2sleep2171rcu_preempt2
5988162101,3sleep2598854-21ntpq2
10737822101,3sleep00-21swapper/00
10654482101,5sleep0725610-21diskmemload0
10555092101,4sleep1725610-21diskmemload1
10554802101,4sleep2725610-21diskmemload2
10321532101,4sleep1725610-21diskmemload1
10153172100,2sleep20-21swapper/22
10124822100,1sleep10-21swapper/11
10041402101,4sleep2725610-21diskmemload2
996028290,1sleep00-21swapper/00
971917291,4sleep0971931-21ssh0
918946291,3sleep2725610-21diskmemload2
859352291,2sleep00-21swapper/00
859310290,3sleep10-21swapper/11
820458291,2sleep10-21swapper/11
789521291,5sleep1790100-21needreboot1
740096291,2sleep20-21swapper/22
740096291,2sleep20-21swapper/22
732953291,3sleep10-21swapper/11
731735291,2sleep20-21swapper/22
709862291,3sleep0709881-21apt-get0
687957291,2sleep00-21swapper/00
683198291,5sleep0684296-21grep0
676096290,4sleep2676144-21ntpq2
676096290,4sleep2676144-21ntpq2
671032291,4sleep1671306-21unixbench_singl1
670647291,4sleep20-21swapper/22
658408291,4sleep1659580-21memory1
654458291,4sleep0654505-21ntpq0
648929290,1sleep00-21swapper/00
640277291,4sleep2641387-21cat2
630148291,4sleep1631856-21tr1
622203291,3sleep1622249-21ntpq1
617125291,4sleep2617137-21run-parts2
616691291,4sleep1616831-21ntp_192.168.1141
602414291,4sleep0602628-21smartctl0
1075711291,5sleep01076164-21kthreadcore0
894059281,2sleep10-21swapper/11
698841280,3sleep1698651-21apt-get1
660742281,3sleep2660767-21munin-run2
656713281,4sleep0658407-21kthreadcore0
640160280,4sleep10-21swapper/11
725239270,1sleep00-21swapper/00
719936270,1sleep20-21swapper/22
684298271,3sleep1686086-21kthreadcore1
682123270,1sleep10-21swapper/11
677587272,2sleep0677300-21/usr/sbin/munin0
670738271,3sleep0670796-21collect20
655195270,1sleep20-21swapper/22
639256270,1sleep10-21swapper/11
639121270,1sleep20-21swapper/22
623516271,3sleep2623735-21cstates2
598965270,1sleep10-21swapper/11
719328260,2sleep10-21swapper/11
714566261,2sleep20-21swapper/22
713920260,3sleep1713973-21/usr/sbin/munin1
700757261,2sleep00-21swapper/00
692750260,1sleep20-21swapper/22
687564260,4sleep20-21swapper/22
635332261,2sleep00-21swapper/00
595016261,2sleep00-21swapper/00
725577250,3sleep10-21swapper/11
724464250,1sleep20-21swapper/22
693357250,1sleep20-21swapper/22
611359251,1sleep20-21swapper/22
704863240,1sleep10-21swapper/11
639547240,1sleep00-21swapper/00
618490240,1sleep00-21swapper/00
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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