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2026-06-23 - 07:08

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 100 highest latencies:
System rack3slot3s.osadl.org (updated Tue Jun 23, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1516865212854,68sleep30-21swapper/33
151601328553,7sleep10-21swapper/11
151668028455,11sleep20-21swapper/22
151665327854,16sleep00-21swapper/00
151710299211,16cyclictest0-21swapper/33
151710299211,16cyclictest0-21swapper/33
151710299202,14cyclictest1938462-21turbostat3
151710299202,12cyclictest1545540-21taskset3
1517102992012,6cyclictest0-21swapper/33
151710299201,16cyclictest0-21swapper/33
151710299201,15cyclictest0-21swapper/33
151710299201,15cyclictest0-21swapper/33
1517102991914,3cyclictest66950irq/132-enp1s0-TxRx-33
1517102991912,4cyclictest0-21swapper/33
151710299191,15cyclictest0-21swapper/33
151710299191,15cyclictest0-21swapper/33
151710299191,14cyclictest1628923-21taskset3
151710299191,14cyclictest0-21swapper/33
151710299191,14cyclictest0-21swapper/33
151710299191,12cyclictest0-21swapper/33
1517102991910,6cyclictest1803028-21taskset3
151710299190,15cyclictest1576665-21sleep3
19265802181,3sleep00-21swapper/00
18923072180,2sleep00-21swapper/00
18601202180,2sleep11644711-21diskmemload1
16507782181,4sleep21644711-21diskmemload2
16274272181,12sleep01627966-21cut0
151710299185,10cyclictest15659432sleep33
151710299182,14cyclictest66950irq/132-enp1s0-TxRx-33
1517102991815,1cyclictest0-21swapper/33
151710299181,4cyclictest0-21swapper/33
1517102991813,2cyclictest0-21swapper/33
151710299181,14cyclictest1720295-21taskset3
151710299181,14cyclictest0-21swapper/33
151710299181,14cyclictest0-21swapper/33
151710299181,14cyclictest0-21swapper/33
151710299181,14cyclictest0-21swapper/33
151710299181,14cyclictest0-21swapper/33
151710299181,14cyclictest0-21swapper/33
151710299181,13cyclictest0-21swapper/33
151710299181,13cyclictest0-21swapper/33
151710299181,12cyclictest1736988-21chrt3
151710299180,15cyclictest0-21swapper/33
151710299180,15cyclictest0-21swapper/33
19797302171,2sleep20-21swapper/22
19518512171,3sleep01947127-21/usr/sbin/munin0
18503902171,2sleep00-21swapper/00
17838042172,10sleep01644711-21diskmemload0
17526822171,3sleep10-21swapper/11
17276082171,11sleep01644711-21diskmemload0
15978162172,4sleep01597839-21apt-get0
151710299178,6cyclictest1623731-21turbostat3
151710299173,10cyclictest1631314-21taskset3
151710299172,13cyclictest0-21swapper/33
151710299172,10cyclictest1729222-21taskset3
151710299171,3cyclictest0-21swapper/33
151710299171,14cyclictest0-21swapper/33
1517102991711,3cyclictest0-21swapper/33
151710299171,13cyclictest0-21swapper/33
151710299171,13cyclictest0-21swapper/33
151710299171,13cyclictest0-21swapper/33
151710299171,13cyclictest0-21swapper/33
151710299171,13cyclictest0-21swapper/33
151710299171,13cyclictest0-21swapper/33
151710299171,12cyclictest0-21swapper/33
151710299171,12cyclictest0-21swapper/33
151710299170,14cyclictest0-21swapper/33
151710299170,14cyclictest0-21swapper/33
19170042161,4sleep01644711-21diskmemload0
19032162161,10sleep11903248-21ssh1
19032162161,10sleep11903248-21ssh1
18602142161,5sleep01860227-21sh0
17941222161,2sleep20-21swapper/22
17294912161,11sleep01731082-21tr0
16504592161,4sleep01644711-21diskmemload0
15870842161,9sleep21587111-21munin-run2
151710299169,4cyclictest0-21swapper/33
1517102991613,1cyclictest0-21swapper/33
1517102991611,3cyclictest0-21swapper/33
151710299160,13cyclictest0-21swapper/33
19611992150,2sleep20-21swapper/22
19458662151,2sleep00-21swapper/00
18455072151,9sleep11845633-21irqstats1
17257992151,4sleep11644711-21diskmemload1
1517102991512,2cyclictest0-21swapper/33
151710299150,12cyclictest0-21swapper/33
151710299150,11cyclictest0-21swapper/33
19867262141,8sleep21644711-21diskmemload2
19607082141,6sleep10-21swapper/11
18750572141,8sleep01644711-21diskmemload0
17451852140,1sleep00-21swapper/00
151710299148,4cyclictest1611511-21chrt3
1517102991412,1cyclictest0-21swapper/33
1517102991412,1cyclictest0-21swapper/33
1517102991410,2cyclictest0-21swapper/33
151710299140,12cyclictest0-21swapper/33
151710299140,11cyclictest0-21swapper/33
19859152130,3sleep11644711-21diskmemload1
19438672131,7sleep11644711-21diskmemload1
19344332131,8sleep21934512-21ssh2
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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