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2026-04-15 - 23:53

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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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

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 Wed Apr 15, 2026 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
861882211762,51sleep30-21swapper/33
86170128757,10sleep20-21swapper/22
86178728251,10sleep10-21swapper/11
86179127955,7sleep00-21swapper/00
86203199261,13cyclictest0-21swapper/33
86203199248,13cyclictest1080791-21turbostat3
86203199240,21cyclictest0-21swapper/33
86203199237,8cyclictest0-21swapper/33
86203199230,20cyclictest0-21swapper/33
13461742230,2sleep00-21swapper/00
10276572231,9sleep01027671-21ssh0
86203199226,8cyclictest0-21swapper/33
862031992213,5cyclictest993400-21taskset3
86203199221,17cyclictest1343104-21taskset3
86203199221,17cyclictest0-21swapper/33
86203199221,12cyclictest0-21swapper/33
86203199220,2cyclictest0-21swapper/33
86203199220,20cyclictest0-21swapper/33
86203199220,13cyclictest0-21swapper/33
86203199220,13cyclictest0-21swapper/33
86203199218,4cyclictest0-21swapper/33
86203199217,5cyclictest0-21swapper/33
86203199211,7cyclictest1158231-21taskset3
86203199211,16cyclictest0-21swapper/33
13311392211,6sleep00-21swapper/00
12275002211,8sleep1993039-21diskmemload1
12006812211,4sleep1993039-21diskmemload1
86203199204,12cyclictest0-21swapper/33
86203199201,7cyclictest1096391-21taskset3
862031992015,3cyclictest0-21swapper/33
86203199201,4cyclictest0-21swapper/33
86203199201,4cyclictest0-21swapper/33
86203199201,16cyclictest0-21swapper/33
86203199201,16cyclictest0-21swapper/33
86203199201,15cyclictest0-21swapper/33
86203199200,11cyclictest0-21swapper/33
86203199199,8cyclictest0-21swapper/33
86203199193,12cyclictest0-21swapper/33
86203199192,13cyclictest0-21swapper/33
86203199191,5cyclictest0-21swapper/33
862031991914,3cyclictest0-21swapper/33
862031991911,5cyclictest0-21swapper/33
86203199191,15cyclictest0-21swapper/33
86203199191,14cyclictest866951-21taskset3
86203199191,14cyclictest1200708-21taskset3
86203199191,14cyclictest0-21swapper/33
86203199191,14cyclictest0-21swapper/33
86203199191,14cyclictest0-21swapper/33
862031991910,6cyclictest0-21swapper/33
86203199190,15cyclictest0-21swapper/33
13477622191,5sleep20-21swapper/22
11966352191,5sleep01198331-21cut0
11416702191,2sleep00-21swapper/00
86203199182,12cyclictest1028578-21taskset3
86203199182,12cyclictest1028578-21taskset3
86203199181,3cyclictest0-21swapper/33
86203199181,14cyclictest0-21swapper/33
86203199181,14cyclictest0-21swapper/33
86203199181,14cyclictest0-21swapper/33
86203199181,14cyclictest0-21swapper/33
86203199181,14cyclictest0-21swapper/33
86203199181,13cyclictest0-21swapper/33
86203199181,13cyclictest0-21swapper/33
86203199180,1cyclictest0-21swapper/33
86203199180,14cyclictest0-21swapper/33
11852442181,8sleep11185257-21ssh1
11472832180,13sleep1993039-21diskmemload1
10538702181,3sleep20-21swapper/22
10083932181,12sleep1993039-21diskmemload1
9986432171,7sleep1993039-21diskmemload1
86203199174,2cyclictest8843362sleep33
86203199170,14cyclictest0-21swapper/33
86203199170,14cyclictest0-21swapper/33
86203199170,13cyclictest0-21swapper/33
86203199170,13cyclictest0-21swapper/33
11918802171,3sleep00-21swapper/00
86203199161,12cyclictest0-21swapper/33
86203199160,9cyclictest0-21swapper/33
86203199160,13cyclictest0-21swapper/33
86203199160,13cyclictest0-21swapper/33
86203199160,12cyclictest0-21swapper/33
13320242161,4sleep2993039-21diskmemload2
13242922160,3sleep20-21swapper/22
12633132161,3sleep00-21swapper/00
11647002160,4sleep01164703-21unixbench_singl0
11589092161,12sleep10-21swapper/11
86203199150,12cyclictest0-21swapper/33
86203199150,12cyclictest0-21swapper/33
86203199150,12cyclictest0-21swapper/33
13589312151,3sleep0993039-21diskmemload0
12911972152,8sleep21291221-21apt-get2
12542382151,3sleep00-21swapper/00
11837142150,3sleep00-21swapper/00
11122862151,9sleep0993039-21diskmemload0
10630602151,4sleep1993039-21diskmemload1
10186582151,4sleep1993039-21diskmemload1
86203199140,1cyclictest0-21swapper/33
13563982141,6sleep21356549-21ntpq2
13519512141,4sleep11351961-21ssh1
12743612141,10sleep10-21swapper/11
12442052141,2sleep10-21swapper/11
11126682141,8sleep1993039-21diskmemload1
10895292141,5sleep11089588-21ssh1
10789442141,9sleep11078956-21ssh1
10445532141,9sleep01044567-21ssh0
9604312130,1sleep10-21swapper/11
9290642131,7sleep0929316-21df0
9282492130,1sleep10-21swapper/11
13410092131,8sleep11341020-21ssh1
12608402131,8sleep21261031-21cat2
12204772131,5sleep20-21swapper/22
11048792131,3sleep21104893-21ssh2
10878802131,4sleep01087894-21ssh0
10555722131,9sleep00-21swapper/00
10521122131,4sleep01052127-21ssh0
10359122130,2sleep20-21swapper/22
10359122130,2sleep20-21swapper/22
9877012121,5sleep2987749-21munin-run2
9814062121,5sleep0981444-21ntpq0
8970302121,3sleep1897087-21kthreadcore1
8959372120,6sleep1895867-31find1
8959362121,6sleep0895867-31find0
13144252121,6sleep00-21swapper/00
12899082121,6sleep1993039-21diskmemload1
12725022121,7sleep2993039-21diskmemload2
12563162121,6sleep11256582-21df1
12548872121,7sleep21254901-21ssh2
12526412121,6sleep1993039-21diskmemload1
12428562121,7sleep01242949-21ntpq0
11690752122,6sleep11169181-21kthreadcore1
11604362121,7sleep11161806-21grep1
11490482121,6sleep00-21swapper/00
11247942121,5sleep090-21kswapd00
11040482121,4sleep1993039-21diskmemload1
10834032121,7sleep21081181-21/usr/sbin/munin2
10776912121,4sleep20-21swapper/22
10071982123,3sleep2862026-21cyclictest2
9991582111,6sleep2999173-21ssh2
9814462111,5sleep1981499-21ntp_states1
9610482111,4sleep2961067-21apt-get2
9397342114,4sleep2939796-21cpuspeed_turbos2
9275262111,5sleep2927573-21ntpq2
9231802111,6sleep2923382-21sed2
9166292111,5sleep2916686-21ntp_states2
9125532111,5sleep1912814-21df_inode1
8906482111,4sleep0874449-21kworker/0:0+events0
8675332111,5sleep0867566-21munin-node0
12974512111,4sleep1993039-21diskmemload1
12807272111,5sleep0993039-21diskmemload0
12799512111,3sleep20-21swapper/22
12692822111,6sleep01269378-21ssh0
12337562111,5sleep11233907-21ntpq1
12251312111,5sleep21225182-21ntpq2
12183402110,3sleep10-21swapper/11
12104372111,5sleep2993039-21diskmemload2
12080712111,6sleep01208284-21grep0
11931182111,6sleep11193129-21ssh1
11919072111,4sleep2993039-21diskmemload2
11838362111,6sleep21183846-21ssh2
11591032111,3sleep00-21swapper/00
11464202111,5sleep21146489-21ntpq2
11237022111,5sleep1993039-21diskmemload1
11232882111,6sleep0993039-21diskmemload0
11211542111,4sleep2993039-21diskmemload2
10727172111,6sleep01072808-21fschecks_time0
10587802111,5sleep20-21swapper/22
10462302111,5sleep11046497-21df1
10349282111,5sleep1993039-21diskmemload1
10349282111,5sleep1993039-21diskmemload1
10337122111,6sleep01033725-21ssh0
10337122111,6sleep01033725-21ssh0
10159342111,3sleep20-21swapper/22
9879602102,3sleep1987979-21apt-get1
9764662101,4sleep1976683-21users1
9663742101,4sleep0966393-21apt-get0
9649542101,5sleep1965094-21ntp_192.168.1141
9450392100,5sleep10-21swapper/11
9431892102,4sleep0943681-21/usr/sbin/munin0
9184332101,4sleep1918636-21hddtemp_smartct1
8841532101,5sleep2884333-21uname2
13592022101,3sleep10-21swapper/11
13400962101,5sleep01340110-21ssh0
13349092101,2sleep20-21swapper/22
13334362101,4sleep1993039-21diskmemload1
13236672100,2sleep11323681-21ssh1
13235552101,3sleep00-21swapper/00
13137882101,4sleep1993039-21diskmemload1
13060382101,4sleep1993039-21diskmemload1
13038982101,4sleep0993039-21diskmemload0
12895912101,5sleep01289605-21ssh0
12823732101,3sleep20-21swapper/22
12388402100,3sleep20-21swapper/22
12297392101,3sleep20-21swapper/22
12273362101,4sleep0993039-21diskmemload0
12137962101,6sleep01215466-21kthreadcore0
12012492101,3sleep20-21swapper/22
11736822101,3sleep2993039-21diskmemload2
11396612100,4sleep1993039-21diskmemload1
11377342101,5sleep21137784-21ntpq2
11308182101,3sleep20-21swapper/22
11300952101,4sleep1993039-21diskmemload1
11028872101,5sleep01102934-21ntpq0
10956002100,4sleep00-21swapper/00
10702062101,4sleep1993039-21diskmemload1
10686952101,2sleep20-21swapper/22
10425512101,4sleep1993039-21diskmemload1
10114772101,6sleep01011856-21tr0
982667291,3sleep1982686-21apt-get1
966396291,4sleep1966651-21df1
963691291,3sleep0964953-21memory0
956267291,4sleep2957597-21kthreadcore2
945061291,4sleep2945289-21expr2
928689291,3sleep2928514-21apt-get2
901875291,2sleep10-21swapper/11
897528291,4sleep2899241-21cut2
875551290,5sleep1876660-21kthreadcore1
862785291,5sleep00-21swapper/00
1314201291,2sleep20-21swapper/22
1308230291,2sleep20-21swapper/22
1297185291,3sleep0993039-21diskmemload0
1272487291,4sleep11272501-21ssh1
1230037291,2sleep00-21swapper/00
1208914291,2sleep10-21swapper/11
1172841291,3sleep0993039-21diskmemload0
1164804290,1sleep20-21swapper/22
1112325291,2sleep20-21swapper/22
1095711291,2sleep10-21swapper/11
1089882291,3sleep21089907-21apt-get2
1069933291,2sleep00-21swapper/00
1037421291,3sleep2993039-21diskmemload2
1023944291,2sleep20-21swapper/22
1019611291,4sleep1993039-21diskmemload1
1007315291,2sleep00-21swapper/00
1000220291,2sleep00-21swapper/00
988967280,5sleep2990668-21kthreadcore2
971112284,2sleep2901452-21kworker/2:0+events_freezable2
950371280,4sleep0950389-21apt-get0
950102280,1sleep00-21swapper/00
939712281,2sleep1939731-21apt-get1
939430281,3sleep21-21systemd2
933429282,3sleep1933649-21unixbench-2d1
911842280,2sleep20-21swapper/22
911574281,4sleep0911582-21sensors0
890488280,1sleep10-21swapper/11
889708281,3sleep2889762-21ntpq2
884392281,3sleep0884441-21gcc0
875434281,3sleep0875550-21irqstats0
1153247280,4sleep21155011-21ssh2
992700271,1sleep00-21swapper/00
977059271,3sleep00-21swapper/00
971975271,2sleep2971994-21apt-get2
954778270,4sleep20-21swapper/22
939124270,1sleep00-21swapper/00
912067270,1sleep10-21swapper/11
902510270,4sleep2903967-21kthreadcore2
891553271,2sleep20-21swapper/22
885027270,1sleep10-21swapper/11
870094271,3sleep1870185-21kernelversion1
864025271,3sleep10-21swapper/11
977316260,1sleep20-21swapper/22
876661261,2sleep20-21swapper/22
868271260,2sleep2869543-21perl2
867289260,1sleep20-21swapper/22
986831250,1sleep00-21swapper/00
960410250,3sleep00-21swapper/00
950392250,1sleep10-21swapper/11
937258250,1sleep10-21swapper/11
923439250,1sleep00-21swapper/00
922237250,1sleep00-21swapper/00
900740250,2sleep00-21swapper/00
912271240,1sleep00-21swapper/00
902171240,1sleep00-21swapper/00
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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