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2026-06-17 - 23:07

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 the highest latencies:
System rack3slot3s.osadl.org (updated Wed Jun 17, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3142440212163,54sleep30-21swapper/33
314263128855,10sleep10-21swapper/11
314265828262,14sleep00-21swapper/00
313776927459,9sleep20-21swapper/22
34286872340,5sleep23428686-21ntpq2
33315412241,3sleep03273558-21diskmemload0
314296299237,12cyclictest0-21swapper/33
3142962992311,8cyclictest3563493-21taskset3
362320422210,7sleep23273558-21diskmemload2
3142962992218,2cyclictest0-21swapper/33
314296299211,16cyclictest0-21swapper/33
314296299211,16cyclictest0-21swapper/33
35659992202,13sleep23566223-21df_inode2
34585552201,14sleep13459704-21tr1
314296299202,15cyclictest66950irq/132-enp1s0-TxRx-33
3142962992017,2cyclictest0-21swapper/33
314296299201,16cyclictest3407659-21turbostat3
314296299201,16cyclictest0-21swapper/33
35462112190,2sleep10-21swapper/11
351279621911,2sleep10-21swapper/11
31766902190,4sleep03176695-21unixbench_singl0
314296299192,13cyclictest3241604-21turbostat3
3142962991916,2cyclictest0-21swapper/33
314296299191,14cyclictest0-21swapper/33
314296299191,14cyclictest0-21swapper/33
314296299191,14cyclictest0-21swapper/33
314296299191,14cyclictest0-21swapper/33
314296299191,14cyclictest0-21swapper/33
314296299191,13cyclictest0-21swapper/33
314296299190,1cyclictest0-21swapper/33
314296299190,17cyclictest0-21swapper/33
314296299188,7cyclictest3230768-21taskset3
314296299182,13cyclictest66950irq/132-enp1s0-TxRx-33
3142962991815,1cyclictest0-21swapper/33
3142962991814,2cyclictest0-21swapper/33
314296299181,14cyclictest0-21swapper/33
314296299181,14cyclictest0-21swapper/33
314296299181,14cyclictest0-21swapper/33
314296299181,14cyclictest0-21swapper/33
314296299181,14cyclictest0-21swapper/33
314296299181,14cyclictest0-21swapper/33
314296299181,14cyclictest0-21swapper/33
314296299181,14cyclictest0-21swapper/33
314296299181,13cyclictest0-21swapper/33
314296299181,13cyclictest0-21swapper/33
314296299181,13cyclictest0-21swapper/33
314296299181,13cyclictest0-21swapper/33
314296299181,13cyclictest0-21swapper/33
314296299180,16cyclictest0-21swapper/33
314296299180,14cyclictest0-21swapper/33
34657752171,3sleep20-21swapper/22
33799682171,3sleep23379979-21sh2
314296299178,6cyclictest3225668-21turbostat3
3142962991714,2cyclictest0-21swapper/33
3142962991711,4cyclictest0-21swapper/33
314296299171,13cyclictest0-21swapper/33
314296299171,13cyclictest0-21swapper/33
314296299171,13cyclictest0-21swapper/33
314296299171,13cyclictest0-21swapper/33
314296299170,14cyclictest0-21swapper/33
34555432161,3sleep20-21swapper/22
34216062161,5sleep03273558-21diskmemload0
33719692160,3sleep10-21swapper/11
32992912163,7sleep13299474-21diskstats1
32822052161,3sleep20-21swapper/22
32781132161,5sleep13278162-21ntpq1
3142962991613,1cyclictest0-21swapper/33
3142962991612,2cyclictest0-21swapper/33
314296299161,12cyclictest0-21swapper/33
314296299161,12cyclictest0-21swapper/33
314296299160,14cyclictest0-21swapper/33
314296299160,14cyclictest0-21swapper/33
314296299160,13cyclictest0-21swapper/33
314296299160,13cyclictest0-21swapper/33
314296299160,13cyclictest0-21swapper/33
314296299160,13cyclictest0-21swapper/33
314296299160,13cyclictest0-21swapper/33
35485652151,3sleep20-21swapper/22
35324692151,4sleep03273558-21diskmemload0
35133982151,4sleep03273558-21diskmemload0
35072512150,1sleep20-21swapper/22
34469162151,2sleep10-21swapper/11
34400762155,6sleep03273558-21diskmemload0
33557012151,4sleep03273558-21diskmemload0
33073082151,3sleep03307369-21ssh0
33061032151,2sleep20-21swapper/22
32512812151,4sleep03251319-21ntpq0
314296299150,13cyclictest0-21swapper/33
314296299150,13cyclictest0-21swapper/33
314296299150,13cyclictest0-21swapper/33
314296299150,13cyclictest0-21swapper/33
314296299150,12cyclictest0-21swapper/33
314296299150,12cyclictest0-21swapper/33
36061052140,3sleep10-21swapper/11
35931502140,3sleep00-21swapper/00
35890722141,4sleep03589082-21ssh0
35217332140,1sleep10-21swapper/11
34897362141,2sleep20-21swapper/22
34824322141,8sleep23273558-21diskmemload2
34823292141,6sleep10-21swapper/11
33890782141,3sleep13389090-21ssh1
33536102141,8sleep20-21swapper/22
33327112141,7sleep03273558-21diskmemload0
314296299141,3cyclictest32101952sleep33
3142962991412,1cyclictest0-21swapper/33
314296299141,11cyclictest0-21swapper/33
36136122131,7sleep03273558-21diskmemload0
36032472131,6sleep03603298-21ntpq0
35957242131,7sleep10-21swapper/11
35471762131,8sleep03547190-21ssh0
34560972131,5sleep10-21swapper/11
33739882131,8sleep03374103-21cat0
33439652131,8sleep13345089-21ssh1
33320952131,7sleep13273558-21diskmemload1
32578622131,4sleep23257915-21cpuspeed_turbos2
32029592131,6sleep13203048-21ntpq1
31931602131,8sleep03671894-21systemd-journal0
314296299130,2cyclictest0-21swapper/33
36213622121,7sleep13621376-21ssh1
35795212121,4sleep00-21swapper/00
35720432121,7sleep13572053-21sh1
35493202121,7sleep03549500-21expr0
35396042121,6sleep23496561-21kworker/u16:2+nfsiod2
35203122122,5sleep23520369-21ssh2
34716882121,6sleep13273558-21diskmemload1
34323612121,7sleep13432369-21ssh1
34137282121,3sleep03273558-21diskmemload0
33811232121,6sleep10-21swapper/11
33410612121,6sleep23273558-21diskmemload2
33139242120,5sleep00-21swapper/00
32792392121,7sleep03279250-21sh0
32565982121,5sleep13256648-21ntpq1
31817242121,5sleep23181769-21ntpq2
31439102121,7sleep13145385-21cut1
36214962111,6sleep03621506-21ssh0
35907182111,3sleep20-21swapper/22
35721182111,3sleep00-21swapper/00
35644842111,4sleep03273558-21diskmemload0
35545132111,3sleep20-21swapper/22
35305462111,2sleep13530557-21ssh1
35227272110,5sleep00-21swapper/00
35131422111,5sleep23273558-21diskmemload2
34723022110,2sleep23472313-21ssh2
34562262110,4sleep03273558-21diskmemload0
34386572110,6sleep23273558-21diskmemload2
34380262112,4sleep13273558-21diskmemload1
34225992111,5sleep10-21swapper/11
33992192111,5sleep03399236-21latency_hist0
33965252111,6sleep13396539-21ssh1
33900832111,5sleep03273558-21diskmemload0
33403622111,2sleep10-21swapper/11
33138482111,5sleep23273558-21diskmemload2
32827192111,6sleep13283388-21cut1
32735462114,4sleep134-21ksoftirqd/11
32525452111,5sleep03252563-21apt-get0
31977622111,6sleep03197819-21ntp_states0
31667802111,5sleep23166983-21diskstats2
31548272111,5sleep03154880-21ntp_states0
36139132100,2sleep20-21swapper/22
36072982101,4sleep13273558-21diskmemload1
35887372101,3sleep20-21swapper/22
35879352101,2sleep10-21swapper/11
35785302101,4sleep13273558-21diskmemload1
35654372101,4sleep13273558-21diskmemload1
35554182101,4sleep13273558-21diskmemload1
35250412102,4sleep20-21swapper/22
35050032101,3sleep10-21swapper/11
35035422100,2sleep00-21swapper/00
34962712101,3sleep00-21swapper/00
34953972101,4sleep13495440-21ntpq1
34829902101,3sleep03273558-21diskmemload0
34714412101,4sleep03273558-21diskmemload0
34659472101,2sleep00-21swapper/00
34312692101,4sleep03273558-21diskmemload0
34149832101,4sleep13273558-21diskmemload1
34065962101,3sleep10-21swapper/11
33819982101,4sleep03273558-21diskmemload0
33658292101,3sleep20-21swapper/22
33646472101,4sleep03273558-21diskmemload0
33452932101,4sleep03345352-21ntpq0
33369422101,4sleep23337008-21ntp_states2
33304212101,2sleep20-21swapper/22
33206352101,4sleep03273558-21diskmemload0
33163052101,4sleep13316444-21diskstats1
33161212100,5sleep23273558-21diskmemload2
33117512101,4sleep13311901-21ntpq1
32971892101,3sleep20-21swapper/22
32965552101,4sleep13273558-21diskmemload1
32880952101,4sleep03273558-21diskmemload0
32671142101,4sleep23267226-21ntp_192.168.1142
32645992100,5sleep03266347-21kthreadcore0
32566502101,4sleep23256703-21ntp_states2
32300212101,4sleep03230075-21ntpq0
32143902101,4sleep03214634-21users0
32099202101,4sleep13209939-21apt-get1
31871852101,2sleep00-21swapper/00
31871852101,2sleep00-21swapper/00
31870802101,4sleep23187130-21ntpq2
31870802101,4sleep23187130-21ntpq2
31821622101,4sleep13182379-21users1
31666962100,1sleep00-21swapper/00
31601912101,5sleep03160269-21grep0
31506972101,3sleep23150716-21apt-get2
3603363290,1sleep20-21swapper/22
3562551291,3sleep23273558-21diskmemload2
3532480291,3sleep13532494-21ssh1
3530017291,2sleep00-21swapper/00
3497787291,2sleep20-21swapper/22
3489035291,3sleep13273558-21diskmemload1
3480349291,3sleep03273558-21diskmemload0
3446689291,3sleep00-21swapper/00
3441864291,5sleep23442900-21kthreadcore2
3421493291,3sleep23273558-21diskmemload2
3414774290,2sleep20-21swapper/22
3405204291,3sleep23273558-21diskmemload2
3400904294,2sleep00-21swapper/00
3397411291,3sleep23273558-21diskmemload2
3388908291,4sleep23388919-21ssh2
3364286291,3sleep23273558-21diskmemload2
3363023291,2sleep10-21swapper/11
3353506291,4sleep13353603-21ntpq1
3290561290,1sleep00-21swapper/00
3278831291,4sleep23278842-21sh2
3272392291,4sleep03272529-21ntpq0
3187033291,4sleep13187073-21ntpq1
3187033291,4sleep13187073-21ntpq1
3177200290,3sleep13177142-31find1
3161355291,3sleep13161374-21apt-get1
3156619291,4sleep23157614-21grep2
3148442291,4sleep03148466-21munin-run0
3574241280,2sleep20-21swapper/22
3246065281,3sleep13246156-21ps1
3241873281,2sleep23241892-21apt-get2
3241562280,2sleep10-21swapper/11
3232576281,3sleep23234284-21kthreadcore2
3231809281,3sleep13232575-21cat1
3204056280,5sleep23204103-21systemd-run2
3177458281,3sleep03177142-31find0
3171620280,1sleep10-21swapper/11
3160926280,1sleep10-21swapper/11
3148482281,3sleep13148986-21if_enp1s01
3272587270,2sleep20-21swapper/22
3258133271,3sleep03258296-21gltestperf0
3236571270,2sleep20-21swapper/22
3230659270,1sleep10-21swapper/11
3225659270,4sleep20-21swapper/22
3224970271,3sleep13225099-21cat1
3219983270,1sleep00-21swapper/00
3214646270,1sleep20-21swapper/22
3209056270,1sleep10-21swapper/11
3208287270,2sleep20-21swapper/22
3205794271,3sleep00-21swapper/00
3203949270,1sleep00-21swapper/00
3193637270,2sleep20-21swapper/22
3193096270,1sleep20-21swapper/22
3176812270,1sleep20-21swapper/22
3166124270,1sleep20-21swapper/22
3166112270,1sleep00-21swapper/00
3266351260,3sleep1321rcuc/11
3261840260,2sleep10-21swapper/11
3251374260,2sleep20-21swapper/22
3248673261,2sleep10-21swapper/11
3241366261,1sleep00-21swapper/00
3231248261,2sleep00-21swapper/00
3225473260,1sleep00-21swapper/00
3225314260,4sleep20-21swapper/22
3220048260,1sleep20-21swapper/22
3198585260,1sleep10-21swapper/11
3192688261,2sleep10-21swapper/11
3145387261,2sleep20-21swapper/22
3246009250,1sleep00-21swapper/00
3219387250,2sleep10-21swapper/11
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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