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2026-08-09 - 23:14

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 Aug 09, 2026 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
417438624830,2sleep20-21swapper/22
37113052131110,12sleep20-21swapper/22
3711438212161,56sleep30-21swapper/33
371145527754,6sleep00-21swapper/00
371143127761,10sleep10-21swapper/11
371181799262,10cyclictest4131196-21taskset3
371181799232,15cyclictest4043692-21chrt3
40832392221,7sleep24083303-21ntp_states2
371181799214,14cyclictest66950irq/132-enp1s0-TxRx-33
3711817992117,2cyclictest0-21swapper/33
371181799211,16cyclictest0-21swapper/33
371181799211,16cyclictest0-21swapper/33
371181799211,16cyclictest0-21swapper/33
40867512201,9sleep13839796-21diskmemload1
392662622016,1sleep30-21swapper/33
38481802200,1sleep10-21swapper/11
3711817992017,2cyclictest0-21swapper/33
3711817992014,3cyclictest66950irq/132-enp1s0-TxRx-33
371181799201,16cyclictest0-21swapper/33
371181799201,15cyclictest0-21swapper/33
371181799201,15cyclictest0-21swapper/33
371181799200,18cyclictest0-21swapper/33
41657402191,3sleep10-21swapper/11
39994112191,8sleep13999641-21expr1
371181799191,15cyclictest0-21swapper/33
371181799191,15cyclictest0-21swapper/33
371181799191,14cyclictest0-21swapper/33
371181799191,14cyclictest0-21swapper/33
371181799191,14cyclictest0-21swapper/33
371181799191,14cyclictest0-21swapper/33
371181799191,14cyclictest0-21swapper/33
371181799191,14cyclictest0-21swapper/33
371181799191,14cyclictest0-21swapper/33
371181799191,14cyclictest0-21swapper/33
41224702181,3sleep00-21swapper/00
40319992181,3sleep10-21swapper/11
371181799181,5cyclictest0-21swapper/33
371181799181,5cyclictest0-21swapper/33
371181799181,14cyclictest0-21swapper/33
371181799181,14cyclictest0-21swapper/33
371181799181,14cyclictest0-21swapper/33
371181799181,14cyclictest0-21swapper/33
371181799181,14cyclictest0-21swapper/33
371181799181,14cyclictest0-21swapper/33
371181799181,14cyclictest0-21swapper/33
371181799181,13cyclictest3828931-21taskset3
371181799181,13cyclictest3828931-21taskset3
371181799181,13cyclictest0-21swapper/33
371181799181,13cyclictest0-21swapper/33
371181799181,13cyclictest0-21swapper/33
371181799181,13cyclictest0-21swapper/33
371181799181,13cyclictest0-21swapper/33
371181799180,15cyclictest0-21swapper/33
371181799180,14cyclictest0-21swapper/33
40498892171,3sleep00-21swapper/00
40308412170,1sleep20-21swapper/22
38899102171,6sleep23839796-21diskmemload2
371181799172,11cyclictest3946294-21taskset3
3711817991713,2cyclictest0-21swapper/33
3711817991713,2cyclictest0-21swapper/33
3711817991711,4cyclictest3745234-21turbostat3
371181799171,13cyclictest0-21swapper/33
371181799171,13cyclictest0-21swapper/33
371181799171,13cyclictest0-21swapper/33
371181799170,14cyclictest3875155-21turbostat3
371181799170,13cyclictest0-21swapper/33
371181799170,13cyclictest0-21swapper/33
40674242160,1sleep20-21swapper/22
40423832161,3sleep13839796-21diskmemload1
39988672161,4sleep03998881-21ssh0
39515592161,3sleep20-21swapper/22
39181302161,3sleep20-21swapper/22
38740982161,2sleep00-21swapper/00
38730612161,2sleep20-21swapper/22
37618942161,11sleep23763390-21tail2
371181799161,13cyclictest0-21swapper/33
371181799161,12cyclictest0-21swapper/33
371181799160,12cyclictest0-21swapper/33
371181799160,12cyclictest0-21swapper/33
64532150,1sleep10-21swapper/11
41841552151,3sleep23839796-21diskmemload2
41205392151,2sleep20-21swapper/22
39887412150,12sleep03839796-21diskmemload0
39300092151,10sleep13928176-21sendmail-msp1
39083632151,4sleep13839796-21diskmemload1
37880992151,6sleep03789131-21kthreadcore0
371181799158,5cyclictest0-21swapper/33
371181799158,3cyclictest37980532sleep33
371181799151,2cyclictest0-21swapper/33
3711817991512,2cyclictest0-21swapper/33
371181799150,12cyclictest0-21swapper/33
371181799150,12cyclictest0-21swapper/33
371181799150,12cyclictest0-21swapper/33
371181799150,12cyclictest0-21swapper/33
371181799150,12cyclictest0-21swapper/33
41373562141,4sleep24137371-21ssh2
41370302141,8sleep13839796-21diskmemload1
41298422141,2sleep10-21swapper/11
41125672141,9sleep04112581-21ssh0
41054992141,9sleep24105120-21sendmail-msp2
40694262141,3sleep14069440-21ssh1
40607142141,3sleep13839796-21diskmemload1
39359522141,3sleep23935965-21ssh2
38986442141,2sleep10-21swapper/11
38538612141,4sleep13853875-21ssh1
37513822141,9sleep03752455-21cut0
37176392141,8sleep03718984-21df0
371181799148,4cyclictest3724502-21chrt3
3711817991411,2cyclictest0-21swapper/33
371181799140,12cyclictest0-21swapper/33
47612131,8sleep24778-21sh2
41500422131,7sleep24150244-21head2
40678102131,8sleep04067829-21ssh0
40144632131,8sleep23839796-21diskmemload2
39621742131,8sleep03962182-21ssh0
39180702130,3sleep13918084-21ssh1
38995742132,7sleep03899588-21ssh0
142652130,4sleep214280-21ssh2
41920462120,2sleep00-21swapper/00
41829272121,6sleep13839796-21diskmemload1
41731602121,6sleep13839796-21diskmemload1
41548452120,8sleep03839796-21diskmemload0
41124142122,4sleep13839796-21diskmemload1
41023982121,6sleep23839796-21diskmemload2
40933672121,5sleep10-21swapper/11
40780552121,6sleep03839796-21diskmemload0
40436582121,4sleep20-21swapper/22
40310842121,6sleep04031098-21ssh0
40237472121,6sleep13839796-21diskmemload1
40237472121,6sleep13839796-21diskmemload1
39816412120,1sleep20-21swapper/22
39639412121,7sleep03963965-21apt-get0
39550922120,1sleep20-21swapper/22
39456222121,7sleep13945636-21ssh1
39452632121,6sleep23839796-21diskmemload2
39440592121,7sleep03839796-21diskmemload0
39268542121,7sleep03926872-21ssh0
39168632121,7sleep03916874-21ssh0
38595412121,7sleep23861022-21cut2
38234252121,5sleep13823669-21users1
38191092122,5sleep23819121-21apt-get2
37954022120,8sleep23796646-21grep2
37407622121,7sleep13740859-21ps1
37245102121,5sleep13724287-21sendmail-msp1
142532121,7sleep114264-21ssh1
41929232111,5sleep20-21swapper/22
41907992110,2sleep10-21swapper/11
41728832111,6sleep04172896-21ssh0
41657712111,3sleep00-21swapper/00
41408392111,5sleep14140874-21ssh1
41146602111,3sleep10-21swapper/11
40918672111,6sleep04092021-21ssh0
40872742111,5sleep03839796-21diskmemload0
40756392111,3sleep20-21swapper/22
40174702111,5sleep04017527-21ssh0
40174702111,5sleep04017527-21ssh0
40042612110,1sleep20-21swapper/22
39910142111,6sleep13991096-21irqstats1
39622382110,3sleep10-21swapper/11
38852792111,6sleep03886812-21tr0
38829652111,3sleep10-21swapper/11
38815402111,3sleep20-21swapper/22
38653602111,1sleep10-21swapper/11
38653472111,5sleep03839796-21diskmemload0
38243302111,5sleep00-21swapper/00
38243302111,5sleep00-21swapper/00
38133522111,3sleep272-21kcompactd02
38032792111,4sleep13803298-21apt-get1
37928232111,5sleep13793076-21df1
37862652111,5sleep13786335-21ntp_states1
37822902111,5sleep23782543-21df2
37718682111,5sleep13771866-21apt-get1
37668872111,6sleep03766994-21fschecks_time0
37600532111,5sleep23760124-21ntp_states2
37399832111,5sleep23740039-21munin-run2
37192542111,5sleep23719273-21apt-get2
73762101,4sleep03839796-21diskmemload0
41814892101,4sleep03839796-21diskmemload0
41585332101,4sleep24158554-21apt-get2
41544872101,3sleep13839796-21diskmemload1
41469342101,4sleep04146948-21ssh0
41414722101,5sleep24142302-21kthreadcore2
41293792100,4sleep2421rcuc/22
41232342101,3sleep00-21swapper/00
41030572101,3sleep00-21swapper/00
40752122101,3sleep10-21swapper/11
40606142101,3sleep20-21swapper/22
40407842101,4sleep03839796-21diskmemload0
40171842101,4sleep24017181-21apt-get2
40171842101,4sleep24017181-21apt-get2
40152362101,4sleep13839796-21diskmemload1
40145362100,2sleep00-21swapper/00
39970332100,2sleep20-21swapper/22
39727812100,4sleep23972805-21apt-get2
39727142101,4sleep13839796-21diskmemload1
39704052101,6sleep23970419-21ssh2
39539662101,2sleep00-21swapper/00
39327682101,4sleep03932836-21ntp_states0
39255552100,1sleep20-21swapper/22
39217952101,5sleep13923488-21rm1
39086392101,2sleep20-21swapper/22
39080812101,2sleep00-21swapper/00
39005882101,2sleep20-21swapper/22
38724062101,3sleep10-21swapper/11
38488152101,3sleep20-21swapper/22
38465752101,2sleep00-21swapper/00
38402252101,4sleep23840227-21apt-get2
38038442100,6sleep23804679-21grep2
37980352101,4sleep23798052-21apt2
37928172101,4sleep03792820-21apt-get0
37455092102,3sleep13745527-21apt-get1
37455042100,6sleep23745279-21sendmail-msp2
37454972101,5sleep039542-21systemd-journal0
37295382101,4sleep03729594-21munin-run0
37160442101,4sleep03716097-21ntp_states0
37122742101,4sleep23712317-21fschecks_count2
151432100,1sleep00-21swapper/00
4137970290,1sleep00-21swapper/00
4096721290,1sleep10-21swapper/11
4089262290,5sleep24090830-21cut2
4058373291,2sleep00-21swapper/00
4049059291,2sleep10-21swapper/11
4039906290,3sleep23839796-21diskmemload2
4003483291,4sleep04003637-21ntp_192.168.1140
3986477291,4sleep13986491-21ssh1
3978030291,2sleep00-21swapper/00
3963901291,2sleep10-21swapper/11
3886813291,5sleep13888302-21latency1
3882042290,2sleep00-21swapper/00
3854850290,1sleep00-21swapper/00
3808552292,3sleep03808555-21apt-get0
3808242291,4sleep03808510-21sed0
3789132291,4sleep13790694-21grep1
3787129290,1sleep00-21swapper/00
3777568291,4sleep23777941-21grep2
3766997290,1sleep10-21swapper/11
3752457291,4sleep13754171-21tr1
3735047291,3sleep13735066-21apt-get1
3731564291,4sleep03733285-21cut0
3946193281,3sleep13946204-21ssh1
3829926280,5sleep03830128-21if_enp1s00
3828402280,5sleep13828489-21processes1
3828402280,5sleep13828489-21processes1
3819090280,2sleep00-21swapper/00
3817715281,3sleep23817813-21grep2
3802932280,1sleep00-21swapper/00
3787521281,4sleep20-21swapper/22
3776479280,2sleep00-21swapper/00
3767164281,3sleep23767800-21cut2
3766202281,4sleep03766205-21sshd-auth0
3761290280,2sleep10-21swapper/11
3759877281,3sleep10-21swapper/11
3729806280,2sleep20-21swapper/22
3726314281,4sleep23727890-21kthreadcore2
3724196281,3sleep13724199-21sshd-auth1
3839675270,1sleep10-21swapper/11
3834811270,1sleep00-21swapper/00
3834198270,1sleep20-21swapper/22
3829099270,1sleep20-21swapper/22
3829099270,1sleep20-21swapper/22
3818452270,4sleep10-21swapper/11
3813883270,3sleep0221rcuc/00
3802753270,3sleep1106713-21snmpd1
3781680270,1sleep00-21swapper/00
3776447270,1sleep20-21swapper/22
3739875270,1sleep00-21swapper/00
3733287271,2sleep10-21swapper/11
3712951271,3sleep13714568-21cut1
3834813260,1sleep20-21swapper/22
3829579260,2sleep10-21swapper/11
3809148261,2sleep10-21swapper/11
3781997260,1sleep10-21swapper/11
3760649260,4sleep00-21swapper/00
3755651260,4sleep20-21swapper/22
3744869260,1sleep20-21swapper/22
3744068260,2sleep03744220-21strings0
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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