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2026-06-17 - 13:00

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 Wed Jun 17, 2026 00:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4060465212654,67sleep30-21swapper/33
406018428557,9sleep10-21swapper/11
406042628453,12sleep20-21swapper/22
406022128351,7sleep00-21swapper/00
1285652270,2sleep00-21swapper/00
406060999223,13cyclictest170013-21taskset3
406060999216,12cyclictest0-21swapper/33
406060999210,16cyclictest66950irq/132-enp1s0-TxRx-33
2471762210,2sleep00-21swapper/00
4060609992016,2cyclictest0-21swapper/33
406060999201,16cyclictest0-21swapper/33
406060999201,16cyclictest0-21swapper/33
406060999201,15cyclictest4065559-21taskset3
406060999201,15cyclictest0-21swapper/33
406060999201,14cyclictest0-21swapper/33
406060999200,7cyclictest4120758-21taskset3
41468182191,5sleep04146859-21ntpq0
4060609991915,2cyclictest0-21swapper/33
4060609991912,5cyclictest0-21swapper/33
406060999191,15cyclictest0-21swapper/33
406060999191,15cyclictest0-21swapper/33
406060999191,14cyclictest66950irq/132-enp1s0-TxRx-33
406060999191,14cyclictest0-21swapper/33
406060999191,14cyclictest0-21swapper/33
406060999191,14cyclictest0-21swapper/33
406060999191,14cyclictest0-21swapper/33
406060999191,14cyclictest0-21swapper/33
406060999191,14cyclictest0-21swapper/33
406060999181,14cyclictest0-21swapper/33
406060999181,14cyclictest0-21swapper/33
406060999181,14cyclictest0-21swapper/33
406060999181,14cyclictest0-21swapper/33
406060999181,14cyclictest0-21swapper/33
406060999181,14cyclictest0-21swapper/33
406060999181,14cyclictest0-21swapper/33
406060999181,14cyclictest0-21swapper/33
406060999181,13cyclictest0-21swapper/33
406060999181,13cyclictest0-21swapper/33
406060999181,13cyclictest0-21swapper/33
406060999181,13cyclictest0-21swapper/33
406060999181,13cyclictest0-21swapper/33
406060999181,13cyclictest0-21swapper/33
406060999180,15cyclictest0-21swapper/33
406060999180,15cyclictest0-21swapper/33
406060999180,15cyclictest0-21swapper/33
406060999180,14cyclictest0-21swapper/33
406060999180,14cyclictest0-21swapper/33
406060999180,14cyclictest0-21swapper/33
406060999180,14cyclictest0-21swapper/33
1973962181,3sleep10-21swapper/11
4060609991711,3cyclictest0-21swapper/33
406060999171,13cyclictest0-21swapper/33
406060999171,13cyclictest0-21swapper/33
406060999171,12cyclictest0-21swapper/33
406060999170,14cyclictest0-21swapper/33
406060999170,14cyclictest0-21swapper/33
406060999170,14cyclictest0-21swapper/33
406060999170,13cyclictest0-21swapper/33
2574352171,3sleep00-21swapper/00
2294112171,5sleep04190461-21diskmemload0
207062171,3sleep10-21swapper/11
207062171,3sleep10-21swapper/11
1797972171,5sleep24190461-21diskmemload2
538092161,2sleep20-21swapper/22
406060999161,4cyclictest86523-21taskset3
406060999161,3cyclictest0-21swapper/33
4060609991613,1cyclictest0-21swapper/33
4060609991611,3cyclictest0-21swapper/33
406060999161,11cyclictest0-21swapper/33
406060999160,13cyclictest0-21swapper/33
406060999160,13cyclictest0-21swapper/33
406060999160,13cyclictest0-21swapper/33
406060999160,13cyclictest0-21swapper/33
367962160,3sleep10-21swapper/11
3075902161,2sleep00-21swapper/00
1978302161,3sleep20-21swapper/22
1031862160,3sleep10-21swapper/11
558162151,3sleep14190461-21diskmemload1
4060609991512,2cyclictest0-21swapper/33
4060609991512,2cyclictest0-21swapper/33
406060999150,13cyclictest0-21swapper/33
406060999150,13cyclictest0-21swapper/33
2973772151,3sleep04190461-21diskmemload0
2973772151,3sleep04190461-21diskmemload0
2885472151,3sleep04190461-21diskmemload0
2300502151,2sleep20-21swapper/22
1903552150,1sleep10-21swapper/11
1815542151,8sleep172-21kcompactd01
1541412151,2sleep20-21swapper/22
125592151,2sleep10-21swapper/11
982762141,2sleep20-21swapper/22
97912141,8sleep09855-21ntpq0
41328492141,9sleep14134516-21cut1
406060999148,3cyclictest41848712sleep33
406060999147,4cyclictest41580822sleep33
4060609991412,1cyclictest0-21swapper/33
406060999140,2cyclictest0-21swapper/33
406060999140,2cyclictest0-21swapper/33
406060999140,2cyclictest0-21swapper/33
406060999140,12cyclictest0-21swapper/33
2631572141,4sleep1263171-21ssh1
2395952140,2sleep20-21swapper/22
1710882141,2sleep00-21swapper/00
1277762141,8sleep14190461-21diskmemload1
41803142131,8sleep04180499-21cut0
41486082131,8sleep24149331-21tr2
3478362130,3sleep10-21swapper/11
3239492130,1sleep00-21swapper/00
3057852131,8sleep14190461-21diskmemload1
2993032131,8sleep2299495-21ls2
2903712131,5sleep20-21swapper/22
2808092131,9sleep00-21swapper/00
2801232130,2sleep20-21swapper/22
1699452132,5sleep24190461-21diskmemload2
1400082131,7sleep04190461-21diskmemload0
1046312131,2sleep00-21swapper/00
966752120,6sleep10-21swapper/11
889322121,6sleep24190461-21diskmemload2
840202121,7sleep185473-21latency1
540012121,2sleep054011-21ssh0
41787422121,5sleep24178791-21ntpq2
41735282121,7sleep14173607-21/usr/sbin/munin1
41414922121,5sleep04141541-21ntpq0
41006682121,7sleep04100087-21/usr/sbin/munin0
40953522121,7sleep04096518-21grep0
40649072121,5sleep04064956-21ntpq0
3489232121,7sleep04190461-21diskmemload0
3456242121,4sleep20-21swapper/22
3225312121,7sleep0322541-21ssh0
286162121,7sleep04190461-21diskmemload0
2307472121,6sleep14190461-21diskmemload1
211242121,6sleep24190461-21diskmemload2
211242121,6sleep24190461-21diskmemload2
1805142121,6sleep04190461-21diskmemload0
1613942121,5sleep14190461-21diskmemload1
1531082121,6sleep1153171-21ntp_states1
956362111,4sleep04190461-21diskmemload0
642842111,5sleep264334-21munin-run2
50002110,1sleep20-21swapper/22
435592111,5sleep243616-21ntpq2
41805932111,6sleep24181624-21cat2
41746782111,5sleep14174697-21apt-get1
41574222111,5sleep14157471-21ntpq1
41474452110,1sleep20-21swapper/22
41361712111,5sleep24136224-21ntp_states2
41107172111,5sleep24110736-21apt-get2
41054342111,5sleep24105695-21df_inode2
40900032111,6sleep14091258-21cut1
40775092111,5sleep14077555-21ntpq1
40775092111,5sleep14077555-21ntpq1
40721982111,5sleep24072247-21ntpq2
3382292111,4sleep24190461-21diskmemload2
3219262111,7sleep2321939-21ssh2
3130762111,3sleep10-21swapper/11
3117682111,5sleep2311822-21ntpq2
308302111,3sleep20-21swapper/22
3056312111,4sleep04190461-21diskmemload0
2974332111,3sleep20-21swapper/22
2974332111,3sleep20-21swapper/22
2716982111,3sleep20-21swapper/22
2569082111,5sleep20-21swapper/22
2558852111,7sleep1255896-21ssh1
2490152111,3sleep00-21swapper/00
2328012111,5sleep1233013-21hddtemp_smartct1
2222662110,1sleep00-21swapper/00
2125032111,5sleep04190461-21diskmemload0
2046502111,3sleep10-21swapper/11
2032602112,5sleep0203304-21ssh0
1969502110,6sleep04190461-21diskmemload0
1720732111,4sleep14190461-21diskmemload1
1626002111,2sleep0171rcu_preempt0
1404732111,5sleep1140740-21df1
1392882111,5sleep14190461-21diskmemload1
1334432111,6sleep2135107-21grep2
1200322111,4sleep24190461-21diskmemload2
1151802111,5sleep0115315-21diskstats0
1122442111,3sleep20-21swapper/22
1122442111,3sleep20-21swapper/22
866262101,3sleep04190461-21diskmemload0
809682101,3sleep20-21swapper/22
809172101,3sleep10-21swapper/11
708312101,4sleep14190461-21diskmemload1
707932101,3sleep24190461-21diskmemload2
705652100,1sleep00-21swapper/00
618332100,2sleep10-21swapper/11
466602101,3sleep14190461-21diskmemload1
451002101,4sleep04190461-21diskmemload0
41681862101,5sleep14168239-21ntp_states1
41681292101,4sleep04168184-21ntpq0
41645432101,5sleep24164643-21sed2
41254222101,5sleep14125472-21ntpq1
41165772100,6sleep04116930-21cat0
363562101,4sleep04190461-21diskmemload0
3377262101,2sleep00-21swapper/00
3326452101,3sleep10-21swapper/11
3321222101,6sleep1332136-21ssh1
3304462101,4sleep24190461-21diskmemload2
3159942101,5sleep1316159-21wc1
2970192101,3sleep10-21swapper/11
2970192101,3sleep10-21swapper/11
280732101,3sleep24190461-21diskmemload2
2712222101,3sleep04190461-21diskmemload0
2623202100,1sleep20-21swapper/22
2412902101,5sleep1241596-21kthreadcore1
2407462101,5sleep2241009-21df2
2376932100,1sleep00-21swapper/00
2046612101,3sleep20-21swapper/22
197052101,4sleep04190461-21diskmemload0
197052101,4sleep04190461-21diskmemload0
1877832101,2sleep20-21swapper/22
1631262101,6sleep2163138-21ssh2
1488842101,4sleep0149146-21df0
1477782100,1sleep00-21swapper/00
14662101,4sleep04190461-21diskmemload0
103902101,4sleep24190461-21diskmemload2
92278291,4sleep293934-21sed2
77531290,1sleep00-21swapper/00
55903291,2sleep00-21swapper/00
4186215291,4sleep04187900-21kthreadcore0
4173725291,5sleep04173750-21switchtime0
4173371290,3sleep24173419-21ntpq2
4153431290,4sleep24153645-21diskstats2
4137699291,5sleep20-21swapper/22
4137117291,4sleep03671894-21systemd-journal0
4121371291,3sleep04121390-21apt-get0
4104846291,2sleep20-21swapper/22
4096519291,4sleep14098310-21cut1
4060783290,2sleep20-21swapper/22
288289290,2sleep10-21swapper/11
28540290,1sleep10-21swapper/11
278546291,4sleep1278625-21ssh1
265830291,3sleep10-21swapper/11
2527291,2sleep10-21swapper/11
222858291,3sleep14190461-21diskmemload1
221990291,2sleep20-21swapper/22
213255290,1sleep10-21swapper/11
212422291,2sleep20-21swapper/22
187615291,2sleep00-21swapper/00
145647290,1sleep20-21swapper/22
120201291,3sleep14190461-21diskmemload1
113263290,1sleep10-21swapper/11
113263290,1sleep10-21swapper/11
111806290,1sleep00-21swapper/00
111806290,1sleep00-21swapper/00
4158711281,2sleep10-21swapper/11
4128649281,3sleep04130472-21grep0
4126412281,4sleep20-21swapper/22
4091259281,3sleep24093064-21kthreadcore2
4079749280,5sleep14081458-21kthreadcore1
4078802281,2sleep00-21swapper/00
123457280,3sleep2123482-21apt-get2
4190420270,1sleep20-21swapper/22
4190214270,1sleep10-21swapper/11
4178855271,3sleep04178941-21ps0
4153098270,1sleep00-21swapper/00
4143007272,2sleep14143122-21fschecks_time1
4142221270,4sleep10-21swapper/11
4115430270,1sleep10-21swapper/11
4110105270,1sleep00-21swapper/00
4099680270,1sleep20-21swapper/22
4094198270,1sleep00-21swapper/00
4088999270,1sleep00-21swapper/00
4088986270,1sleep20-21swapper/22
4078279270,1sleep00-21swapper/00
4078279270,1sleep00-21swapper/00
4073086270,4sleep00-21swapper/00
4068673271,3sleep10-21swapper/11
4158707260,1sleep20-21swapper/22
4158182260,1sleep00-21swapper/00
4152747260,1sleep10-21swapper/11
4130473260,2sleep14130712-21strings1
4126676260,1sleep20-21swapper/22
4116066260,3sleep10-21swapper/11
4105977261,2sleep10-21swapper/11
4089156260,4sleep10-21swapper/11
4083761260,1sleep20-21swapper/22
4073470261,2sleep20-21swapper/22
4073470261,2sleep20-21swapper/22
4065703260,4sleep10-21swapper/11
4183934250,2sleep14183996-21needreboot1
4162890250,1sleep00-21swapper/00
4116321250,2sleep20-21swapper/22
4114830250,1sleep00-21swapper/00
4100252240,1sleep10-21swapper/11
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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