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2026-04-05 - 19:52

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 Apr 05, 2026 12:43:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2073177211755,58sleep30-21swapper/33
207318028556,10sleep10-21swapper/11
207336528062,12sleep20-21swapper/22
207319427955,7sleep00-21swapper/00
207365999241,14cyclictest0-21swapper/33
207365999241,14cyclictest0-21swapper/33
207365999231,18cyclictest0-21swapper/33
207365999221,17cyclictest2256276-21taskset3
22876032211,13sleep22287702-21ntpq2
2073659992118,1cyclictest0-21swapper/33
2073659992017,1cyclictest0-21swapper/33
2073659992015,3cyclictest0-21swapper/33
2073659992012,6cyclictest0-21swapper/33
207365999201,15cyclictest66950irq/132-enp1s0-TxRx-33
207365999193,13cyclictest0-21swapper/33
2073659991916,1cyclictest0-21swapper/33
207365999191,15cyclictest0-21swapper/33
207365999191,15cyclictest0-21swapper/33
207365999191,15cyclictest0-21swapper/33
207365999191,15cyclictest0-21swapper/33
207365999191,15cyclictest0-21swapper/33
207365999191,14cyclictest66950irq/132-enp1s0-TxRx-33
207365999191,14cyclictest2318223-21turbostat3
207365999191,14cyclictest0-21swapper/33
207365999191,14cyclictest0-21swapper/33
207365999191,14cyclictest0-21swapper/33
207365999191,14cyclictest0-21swapper/33
207365999191,14cyclictest0-21swapper/33
207365999191,14cyclictest0-21swapper/33
24138322180,2sleep20-21swapper/22
22829022181,3sleep10-21swapper/11
21461512181,7sleep22146960-21tr2
21400282180,5sleep12140052-21perf1
2073659991815,1cyclictest0-21swapper/33
2073659991813,1cyclictest0-21swapper/33
207365999181,14cyclictest0-21swapper/33
207365999181,14cyclictest0-21swapper/33
207365999181,14cyclictest0-21swapper/33
207365999181,14cyclictest0-21swapper/33
207365999181,14cyclictest0-21swapper/33
207365999181,14cyclictest0-21swapper/33
207365999181,14cyclictest0-21swapper/33
207365999181,14cyclictest0-21swapper/33
207365999181,14cyclictest0-21swapper/33
207365999181,14cyclictest0-21swapper/33
207365999181,14cyclictest0-21swapper/33
207365999181,14cyclictest0-21swapper/33
207365999181,14cyclictest0-21swapper/33
207365999181,13cyclictest0-21swapper/33
207365999181,13cyclictest0-21swapper/33
207365999181,13cyclictest0-21swapper/33
207365999181,13cyclictest0-21swapper/33
207365999181,13cyclictest0-21swapper/33
207365999181,12cyclictest0-21swapper/33
2073659991810,5cyclictest66950irq/132-enp1s0-TxRx-33
25684102179,4sleep10-21swapper/11
25111032171,3sleep02511116-21ssh0
24497952171,3sleep20-21swapper/22
24040652171,2sleep10-21swapper/11
24040652171,2sleep10-21swapper/11
22715632171,3sleep00-21swapper/00
2073659991710,4cyclictest0-21swapper/33
207365999170,14cyclictest0-21swapper/33
207365999170,14cyclictest0-21swapper/33
207365999170,13cyclictest0-21swapper/33
207365999170,13cyclictest0-21swapper/33
236811021610,3sleep02368124-21ssh0
23578582161,8sleep22357926-21ntpq2
22825362161,3sleep00-21swapper/00
2073659991614,1cyclictest0-21swapper/33
207365999161,3cyclictest0-21swapper/33
207365999160,13cyclictest0-21swapper/33
207365999160,13cyclictest0-21swapper/33
25465612151,3sleep02203956-21diskmemload0
25264252150,3sleep10-21swapper/11
23416292151,4sleep02203956-21diskmemload0
207365999154,7cyclictest0-21swapper/33
207365999151,2cyclictest0-21swapper/33
207365999150,13cyclictest0-21swapper/33
207365999150,13cyclictest0-21swapper/33
207365999150,13cyclictest0-21swapper/33
207365999150,12cyclictest0-21swapper/33
207365999150,11cyclictest0-21swapper/33
25345972141,2sleep00-21swapper/00
24646262141,3sleep12203956-21diskmemload1
24567832141,9sleep12456795-21ssh1
24137652141,3sleep12203956-21diskmemload1
23827462140,2sleep00-21swapper/00
23155202141,9sleep22315534-21ssh2
22495942145,5sleep02251263-21cut0
22107902141,3sleep12210801-21ssh1
207365999148,3cyclictest2177132-21chrt3
2073659991411,2cyclictest0-21swapper/33
207365999140,12cyclictest0-21swapper/33
207365999140,11cyclictest0-21swapper/33
25707582131,8sleep02203956-21diskmemload0
25606202131,8sleep12560631-21ssh1
25497832131,2sleep10-21swapper/11
25420482131,7sleep02542108-21ntpq0
25006732131,7sleep02203956-21diskmemload0
25006732131,7sleep02203956-21diskmemload0
24951182131,7sleep12496781-21cut1
24951182131,7sleep12496781-21cut1
24719782131,7sleep12472042-21ntp_states1
24216592131,3sleep12203956-21diskmemload1
23587812130,8sleep12203956-21diskmemload1
23506162130,2sleep12203956-21diskmemload1
23189462131,8sleep02319158-21ssh0
22357092131,2sleep00-21swapper/00
22284132131,6sleep22228425-21rm2
22259792131,6sleep12226102-21ntpq1
21230562131,6sleep12123105-21ntpq1
21077882131,4sleep12107838-21dbus-daemon1
207365999130,2cyclictest0-21swapper/33
207365999130,2cyclictest0-21swapper/33
25347762120,6sleep20-21swapper/22
24910902121,7sleep22491104-21ssh2
24380812120,1sleep20-21swapper/22
24028782121,3sleep02402888-21ssh0
24028782121,3sleep02402888-21ssh0
23946412127,2sleep00-21swapper/00
23763482121,7sleep02376362-21ssh0
23530582121,7sleep22353072-21ssh2
23346102125,4sleep1331ktimers/11
23227582121,7sleep22322825-21ld2
22711802120,5sleep22271192-21rm2
22701612121,6sleep12270218-21ssh1
22626962121,3sleep12262707-21ssh1
22435452121,6sleep02243602-21ntpq0
22348442121,5sleep22234908-21ntpq2
22172812120,7sleep22203956-21diskmemload2
22080342121,8sleep02208440-21needreboot0
21935332121,7sleep22193553-21dpkg2
21762562121,6sleep22176313-21ntpq2
21709922121,5sleep12171042-21ntpq1
21136472121,7sleep02113666-21apt-get0
20856502121,5sleep22085894-21users2
25506282111,5sleep22550779-21ntpq2
25430832111,3sleep20-21swapper/22
25111252111,4sleep22203956-21diskmemload2
24989842111,5sleep20-21swapper/22
24989842111,5sleep20-21swapper/22
24719132111,4sleep02471974-21ntpq0
24556112111,7sleep02455613-21ssh0
23973272111,3sleep20-21swapper/22
23973272111,3sleep20-21swapper/22
23789982111,5sleep12203956-21diskmemload1
23769832111,3sleep20-21swapper/22
23417102111,6sleep22341725-21ssh2
23336062111,4sleep22203956-21diskmemload2
23242562111,3sleep10-21swapper/11
23077342111,3sleep20-21swapper/22
23016682111,6sleep12302076-21kthreadcore1
22909422110,1sleep10-21swapper/11
22632722110,2sleep20-21swapper/22
22480902111,3sleep20-21swapper/22
22449822112,3sleep22203956-21diskmemload2
22394192111,5sleep12239689-21df_inode1
22133922111,5sleep02213614-21sh0
22126392111,3sleep20-21swapper/22
21616252112,5sleep02161823-21expr0
21497582110,1sleep00-21swapper/00
21442062111,6sleep12144321-21gcc1
21365132112,4sleep02138293-21cut0
21299082111,3sleep02129936-21cut0
21156002111,2sleep20-21swapper/22
25705292101,3sleep20-21swapper/22
25428132101,4sleep12203956-21diskmemload1
25350052101,4sleep12203956-21diskmemload1
25279702101,4sleep22203956-21diskmemload2
25242372100,1sleep02524420-21strings0
25166602100,2sleep10-21swapper/11
24932692101,3sleep10-21swapper/11
24908122100,5sleep02203956-21diskmemload0
24800042101,4sleep12480494-21memory1
24732742100,1sleep20-21swapper/22
24589592101,3sleep00-21swapper/00
24584332101,3sleep20-21swapper/22
24496312100,2sleep10-21swapper/11
24474992100,1sleep00-21swapper/00
24390232101,2sleep00-21swapper/00
24297642101,4sleep12203956-21diskmemload1
24286292101,4sleep02428842-21users0
24281432101,4sleep22428198-21ntpq2
24192222101,4sleep22419380-21ntpq2
24152692101,5sleep02415482-21diskstats0
24111212101,3sleep00-21swapper/00
23954902101,3sleep20-21swapper/22
23862982101,4sleep12203956-21diskmemload1
23798712101,4sleep20-21swapper/22
23697912101,3sleep12203956-21diskmemload1
23511602101,2sleep00-21swapper/00
23364622101,4sleep12336677-21hddtemp_smartct1
23278612101,4sleep02327946-21irqstats0
23151452101,2sleep10-21swapper/11
23098362101,3sleep00-21swapper/00
23075562101,6sleep00-21swapper/00
23004012101,3sleep00-21swapper/00
22274292101,2sleep00-21swapper/00
21881952101,5sleep00-21swapper/00
21775652101,3sleep20-21swapper/22
21719562101,5sleep00-21swapper/00
21545272101,5sleep12154954-21tail1
21495262101,4sleep12149639-21ntpq1
2559372291,4sleep02559524-21ssh0
2555375291,4sleep22555644-21/usr/sbin/munin2
2517837290,2sleep20-21swapper/22
2515725291,4sleep02515790-21ntpq0
2502856291,3sleep12203956-21diskmemload1
2483561291,3sleep22203956-21diskmemload2
2482368291,2sleep00-21swapper/00
2458985290,3sleep20-21swapper/22
2436990291,3sleep12203956-21diskmemload1
2393798290,1sleep10-21swapper/11
2359120290,1sleep00-21swapper/00
2299257291,2sleep20-21swapper/22
2297569291,2sleep10-21swapper/11
2288951291,3sleep02203956-21diskmemload0
2280062290,1sleep20-21swapper/22
2253721290,3sleep10-21swapper/11
2235617291,3sleep12203956-21diskmemload1
2220906291,3sleep12203956-21diskmemload1
2198899291,3sleep22198918-21apt-get2
2177036290,2sleep00-21swapper/00
2124304291,3sleep00-21swapper/00
2102812290,6sleep02103030-21cat0
2074399291,4sleep02075397-21tr0
2362408281,2sleep20-21swapper/22
2257192281,2sleep00-21swapper/00
2192560281,3sleep22192760-21unixbench-2d2
2182602280,1sleep00-21swapper/00
2161153280,2sleep00-21swapper/00
2130166280,4sleep22130511-21grep2
2124583280,5sleep22124671-21fschecks_time2
2086321280,1sleep00-21swapper/00
2081749281,3sleep02083187-21cut0
2075399281,3sleep12075920-21kthreadcore1
2203705271,3sleep0555-21dbus-daemon0
2187913270,1sleep10-21swapper/11
2182869270,2sleep00-21swapper/00
2181799270,1sleep10-21swapper/11
2171269271,3sleep22171498-21awk2
2166342270,1sleep10-21swapper/11
2166318270,1sleep20-21swapper/22
2157801271,2sleep20-21swapper/22
2156840271,3sleep12157797-21kthreadcore1
2140282270,1sleep00-21swapper/00
2139718270,2sleep20-21swapper/22
2129015270,1sleep10-21swapper/11
2114220271,3sleep10-21swapper/11
2109114270,4sleep02110792-21kthreadcore0
2107992270,1sleep20-21swapper/22
2102101270,1sleep10-21swapper/11
2102082270,1sleep20-21swapper/22
2097186270,2sleep02097205-21apt-get0
2092954271,3sleep20-21swapper/22
2078008270,3sleep22078086-21awk2
2198404260,4sleep00-21swapper/00
2197249260,2sleep12197536-21strings1
2189413261,2sleep10-21swapper/11
2176142260,1sleep10-21swapper/11
2152713261,2sleep00-21swapper/00
2150947261,2sleep20-21swapper/22
2134471260,4sleep10-21swapper/11
2123691260,1sleep20-21swapper/22
2091878260,2sleep10-21swapper/11
2091356260,1sleep10-21swapper/11
2086552260,1sleep20-21swapper/22
2083188261,2sleep10-21swapper/11
2182659251,1sleep20-21swapper/22
2140856250,1sleep20-21swapper/22
2118976250,1sleep00-21swapper/00
2113188250,4sleep10-21swapper/11
2108292250,1sleep20-21swapper/22
2095762250,2sleep00-21swapper/00
2199200240,1sleep10-21swapper/11
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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