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2026-06-28 - 07:39

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 Sun Jun 28, 2026 00:43:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
795808215891,63sleep30-21swapper/33
79607829073,11sleep20-21swapper/22
79602628655,12sleep10-21swapper/11
79600028361,14sleep00-21swapper/00
79620599233,13cyclictest1188974-21taskset3
79620599221,15cyclictest0-21swapper/33
11050542221,8sleep0923923-21diskmemload0
79620599212,13cyclictest1257752-21chrt3
9022552201,5sleep0902481-21sed0
79620599201,15cyclictest0-21swapper/33
79620599201,15cyclictest0-21swapper/33
10047732201,9sleep1923923-21diskmemload1
79620599195,12cyclictest1063469-21taskset3
796205991914,3cyclictest0-21swapper/33
79620599191,15cyclictest0-21swapper/33
79620599191,15cyclictest0-21swapper/33
79620599191,14cyclictest0-21swapper/33
79620599191,14cyclictest0-21swapper/33
79620599191,14cyclictest0-21swapper/33
79620599182,10cyclictest796418-21taskset3
796205991815,1cyclictest0-21swapper/33
796205991812,4cyclictest0-21swapper/33
796205991812,3cyclictest0-21swapper/33
79620599181,14cyclictest0-21swapper/33
79620599181,14cyclictest0-21swapper/33
79620599181,14cyclictest0-21swapper/33
79620599181,14cyclictest0-21swapper/33
79620599181,14cyclictest0-21swapper/33
79620599181,13cyclictest0-21swapper/33
79620599181,12cyclictest1081515-21taskset3
79620599181,12cyclictest0-21swapper/33
12659842181,6sleep2923923-21diskmemload2
11284652181,4sleep0923923-21diskmemload0
9892502171,4sleep1923923-21diskmemload1
79620599172,9cyclictest957347-21taskset3
79620599172,11cyclictest923930-21turbostat3
79620599172,11cyclictest1163995-21taskset3
796205991711,4cyclictest0-21swapper/33
796205991711,3cyclictest0-21swapper/33
79620599171,13cyclictest0-21swapper/33
79620599171,13cyclictest0-21swapper/33
79620599171,13cyclictest0-21swapper/33
79620599171,13cyclictest0-21swapper/33
79620599171,13cyclictest0-21swapper/33
79620599171,13cyclictest0-21swapper/33
79620599171,13cyclictest0-21swapper/33
79620599171,13cyclictest0-21swapper/33
79620599171,13cyclictest0-21swapper/33
79620599171,13cyclictest0-21swapper/33
79620599171,12cyclictest887215-21taskset3
79620599171,11cyclictest0-21swapper/33
79620599170,13cyclictest1007146-21taskset3
12323752171,12sleep11232652-21cat1
11960772171,5sleep20-21swapper/22
11877962171,4sleep20-21swapper/22
9536242160,2sleep20-21swapper/22
796205991614,1cyclictest0-21swapper/33
796205991613,1cyclictest0-21swapper/33
796205991611,4cyclictest0-21swapper/33
796205991611,4cyclictest0-21swapper/33
796205991611,3cyclictest66950irq/132-enp1s0-TxRx-33
79620599161,12cyclictest0-21swapper/33
79620599161,12cyclictest0-21swapper/33
79620599161,12cyclictest0-21swapper/33
79620599160,14cyclictest0-21swapper/33
79620599160,13cyclictest0-21swapper/33
79620599160,13cyclictest0-21swapper/33
11806772161,10sleep01180700-21ssh0
11470322161,2sleep10-21swapper/11
11214462160,1sleep20-21swapper/22
9561222152,5sleep1171rcu_preempt1
79620599151,3cyclictest0-21swapper/33
79620599151,3cyclictest0-21swapper/33
796205991513,1cyclictest0-21swapper/33
796205991512,2cyclictest0-21swapper/33
796205991512,2cyclictest0-21swapper/33
796205991512,2cyclictest0-21swapper/33
796205991512,1cyclictest0-21swapper/33
79620599150,13cyclictest0-21swapper/33
79620599150,13cyclictest0-21swapper/33
79620599150,13cyclictest0-21swapper/33
12125072150,4sleep10-21swapper/11
11623542150,1sleep10-21swapper/11
11356452151,2sleep20-21swapper/22
11297442151,3sleep20-21swapper/22
11130672151,2sleep10-21swapper/11
10797062150,2sleep20-21swapper/22
9383422141,2sleep10-21swapper/11
79620599149,3cyclictest0-21swapper/33
79620599141,11cyclictest0-21swapper/33
79620599140,12cyclictest0-21swapper/33
79620599140,12cyclictest0-21swapper/33
79620599140,12cyclictest0-21swapper/33
12577312142,5sleep20-21swapper/22
12481432141,8sleep0923923-21diskmemload0
12020022141,2sleep10-21swapper/11
12020022141,2sleep10-21swapper/11
10553292141,3sleep2923923-21diskmemload2
9954292131,6sleep244-21ksoftirqd/22
9633952131,5sleep20-21swapper/22
9126122131,8sleep1912763-21sort1
8719912131,6sleep1872114-21diskstats1
8036792131,7sleep1803675-21apt1
12390412131,8sleep11239051-21ssh1
12376182131,3sleep01237629-21ssh0
11771422131,6sleep2923923-21diskmemload2
11617332131,8sleep21161747-21ssh2
11444332131,6sleep2923923-21diskmemload2
10979462131,6sleep20-21swapper/22
10809322131,8sleep11080943-21sh1
10805942131,8sleep01080605-21ssh0
10471832131,7sleep1923923-21diskmemload1
10363202131,2sleep20-21swapper/22
10311432131,8sleep11031154-21ssh1
10134812131,5sleep20-21swapper/22
10133852131,7sleep0923923-21diskmemload0
9709122121,7sleep1970925-21ssh1
9477112121,3sleep1947725-21ssh1
9090622121,7sleep0910565-21cut0
9033212121,5sleep0903510-21diskstats0
8823882121,5sleep2882571-21diskstats2
8602322121,7sleep0860363-21wc0
8461932121,7sleep1847631-21grep1
8090862121,5sleep1809209-21diskstats1
12319182121,6sleep2923923-21diskmemload2
12075782121,5sleep01205287-40find0
11966842121,7sleep11196694-21ssh1
11802442120,2sleep10-21swapper/11
11775442122,6sleep0923923-21diskmemload0
10957772120,8sleep21095789-21ssh2
10646182121,7sleep11064630-21ssh1
10626712121,6sleep0923923-21diskmemload0
10550252121,6sleep0923923-21diskmemload0
10388652121,5sleep00-21swapper/00
10203522120,8sleep1923923-21diskmemload1
10061992121,3sleep21006211-21rm2
9980202111,5sleep0923923-21diskmemload0
9880992111,3sleep20-21swapper/22
9790252111,3sleep20-21swapper/22
9542282111,4sleep0923923-21diskmemload0
9461002111,5sleep2923923-21diskmemload2
9407732111,5sleep0923923-21diskmemload0
9314962111,3sleep20-21swapper/22
9292482111,4sleep1923923-21diskmemload1
8904932111,5sleep1891397-21memory1
8828552111,6sleep1884043-21cat1
8820092111,5sleep1882068-21munin-run1
8820092111,5sleep1882068-21munin-run1
8758412111,5sleep0875894-21ntp_states0
8339302111,5sleep0833979-21ntp_states0
8141882111,5sleep0814445-21df0
7963952111,5sleep1796414-21apt-get1
12637042111,3sleep10-21swapper/11
12557642111,4sleep1923923-21diskmemload1
12496912111,5sleep21249909-21hddtemp_smartct2
12227772111,3sleep00-21swapper/00
12208482111,4sleep1923923-21diskmemload1
12046792110,5sleep014-21ksoftirqd/00
12046792110,5sleep014-21ksoftirqd/00
11874232111,6sleep11187434-21ssh1
11630372110,5sleep014-21ksoftirqd/00
11532362111,6sleep21153247-21ssh2
11458382110,2sleep00-21swapper/00
11381252111,6sleep01138136-21sh0
11213262111,3sleep10-21swapper/11
11211902111,4sleep0923923-21diskmemload0
11051542111,6sleep11105164-21ssh1
10854162111,5sleep1923923-21diskmemload1
10656352111,6sleep01066163-21kthreadcore0
10649732111,4sleep2923923-21diskmemload2
10153572111,4sleep2923923-21diskmemload2
9958472101,5sleep10-21swapper/11
9796142101,3sleep0923923-21diskmemload0
9794352101,4sleep10-21swapper/11
9709652101,2sleep20-21swapper/22
9658522101,4sleep0966124-21df_inode0
9631042101,4sleep1923923-21diskmemload1
9627692101,3sleep00-21swapper/00
9331832101,5sleep0932650-21/usr/sbin/munin0
9327472101,4sleep2932960-21diskstats2
9293202101,4sleep0923923-21diskmemload0
9189652101,4sleep2918968-21apt-get2
9068192101,5sleep1907197-21needreboot1
8665522101,5sleep0866616-21cpuspeed_turbos0
8561042101,3sleep2856106-21apt-get2
8508422101,3sleep0850861-21apt-get0
8403912101,3sleep00-21swapper/00
8351412101,3sleep10-21swapper/11
8199372101,4sleep0820008-21irqstats0
8086252101,4sleep0808661-21munin-run0
12728802100,2sleep01272887-21ssh0
12714812100,6sleep11271495-21ssh1
12628502100,5sleep0923923-21diskmemload0
12410222100,1sleep10-21swapper/11
12250432101,5sleep01225467-21kthreadcore0
12218992101,3sleep2923923-21diskmemload2
12040022100,5sleep2923923-21diskmemload2
12040022100,5sleep2923923-21diskmemload2
11639702101,3sleep20-21swapper/22
11308792100,5sleep10-21swapper/11
11278142100,2sleep10-21swapper/11
11121102101,4sleep2923923-21diskmemload2
10961942100,2sleep00-21swapper/00
10870072100,1sleep00-21swapper/00
10813902100,1sleep20-21swapper/22
10617042101,3sleep2923923-21diskmemload2
10451892100,1sleep20-21swapper/22
10443202101,4sleep01044378-21ntp_states0
10302062100,4sleep20-21swapper/22
10287372100,1sleep00-21swapper/00
10159792101,5sleep01016112-21tr0
987458291,2sleep00-21swapper/00
918678291,4sleep2918792-21sed2
913714291,3sleep1913733-21apt-get1
901930291,4sleep1902022-21/usr/sbin/munin1
888815291,4sleep0890492-21tr0
882282291,2sleep00-21swapper/00
845610291,3sleep0845629-21apt-get0
831229291,4sleep1832915-21cut1
1255165290,1sleep00-21swapper/00
1246158290,1sleep20-21swapper/22
1232705291,4sleep21232717-21rm2
1211879292,2sleep20-21swapper/22
1193182290,3sleep00-21swapper/00
1169820290,3sleep0923923-21diskmemload0
1164286291,3sleep10-21swapper/11
1154756291,3sleep0923923-21diskmemload0
1152912291,2sleep10-21swapper/11
1106351290,5sleep00-21swapper/00
1094964290,3sleep10-21swapper/11
1069847291,3sleep1923923-21diskmemload1
1055722290,5sleep11055734-21ssh1
1036868291,3sleep1923923-21diskmemload1
1014808291,2sleep10-21swapper/11
1003195291,4sleep00-21swapper/00
918641280,1sleep00-21swapper/00
903220281,2sleep20-21swapper/22
893732280,5sleep0895366-21cut0
824674281,2sleep00-21swapper/00
824032280,2sleep10-21swapper/11
818462281,3sleep2818705-21unixbench_singl2
809494281,3sleep0809526-21kthreadcore0
801433281,3sleep20-21swapper/22
796416281,2sleep20-21swapper/22
923770270,1sleep00-21swapper/00
898584271,3sleep20-21swapper/22
893105271,2sleep20-21swapper/22
872115271,3sleep20-21swapper/22
871190272,1sleep20-21swapper/22
860910270,1sleep10-21swapper/11
855746270,1sleep20-21swapper/22
849743270,3sleep2849884-21/usr/sbin/munin2
845001270,1sleep20-21swapper/22
839810270,1sleep00-21swapper/00
835912271,2sleep2837238-21kthreadcore2
825257271,2sleep10-21swapper/11
824274270,1sleep20-21swapper/22
818838270,1sleep10-21swapper/11
922814261,2sleep10-21swapper/11
912269260,1sleep2912442-21strings2
897629260,3sleep10-21swapper/11
887516260,2sleep20-21swapper/22
881757260,1sleep00-21swapper/00
881757260,1sleep00-21swapper/00
881660260,1sleep20-21swapper/22
881660260,1sleep20-21swapper/22
868236260,2sleep10-21swapper/11
862794260,2sleep10-21swapper/11
850832261,2sleep1205-21jbd2/sda2-81
841376261,2sleep10-21swapper/11
826707261,2sleep20-21swapper/22
812647260,2sleep2812883-21strings2
861887251,1sleep00-21swapper/00
861107250,1sleep20-21swapper/22
829919250,1sleep20-21swapper/22
796383250,1sleep00-21swapper/00
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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