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2026-05-04 - 19:41

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 Mon May 04, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3905612212252,65sleep30-21swapper/33
390575928758,11sleep10-21swapper/11
390543828762,16sleep20-21swapper/22
390572727756,15sleep00-21swapper/00
278392300,3sleep10-21swapper/11
3905887992623,2cyclictest0-21swapper/33
390588799231,18cyclictest79102-21taskset3
390588799231,13cyclictest252782sleep33
390588799221,3cyclictest0-21swapper/33
390588799221,3cyclictest0-21swapper/33
390588799221,17cyclictest4042808-21taskset3
39606292211,15sleep13960873-21users1
390588799207,8cyclictest66950irq/132-enp1s0-TxRx-33
390588799203,13cyclictest0-21swapper/33
3905887992016,2cyclictest0-21swapper/33
390588799201,16cyclictest0-21swapper/33
390588799201,15cyclictest0-21swapper/33
1858552201,8sleep14036141-21diskmemload1
41316562191,7sleep14133326-21cut1
390588799199,7cyclictest0-21swapper/33
390588799191,5cyclictest0-21swapper/33
3905887991915,2cyclictest0-21swapper/33
390588799191,15cyclictest4024718-21taskset3
390588799191,15cyclictest0-21swapper/33
390588799191,15cyclictest0-21swapper/33
390588799191,14cyclictest3911118-21chrt3
390588799191,14cyclictest0-21swapper/33
390588799191,14cyclictest0-21swapper/33
390588799191,13cyclictest4031074-21chrt3
41623532181,6sleep24162364-21ssh2
3905887991812,5cyclictest0-21swapper/33
390588799181,14cyclictest0-21swapper/33
390588799181,14cyclictest0-21swapper/33
390588799181,14cyclictest0-21swapper/33
390588799181,14cyclictest0-21swapper/33
390588799181,14cyclictest0-21swapper/33
390588799181,14cyclictest0-21swapper/33
390588799181,14cyclictest0-21swapper/33
390588799181,13cyclictest3950267-21taskset3
390588799181,13cyclictest0-21swapper/33
390588799181,13cyclictest0-21swapper/33
390588799181,13cyclictest0-21swapper/33
390588799181,13cyclictest0-21swapper/33
390588799181,13cyclictest0-21swapper/33
390588799181,13cyclictest0-21swapper/33
390588799181,13cyclictest0-21swapper/33
3905887991810,5cyclictest66950irq/132-enp1s0-TxRx-33
390588799180,15cyclictest0-21swapper/33
390588799180,14cyclictest0-21swapper/33
390588799180,14cyclictest0-21swapper/33
3905887991713,1cyclictest0-21swapper/33
3905887991711,3cyclictest0-21swapper/33
390588799171,13cyclictest0-21swapper/33
390588799171,13cyclictest0-21swapper/33
390588799171,13cyclictest0-21swapper/33
390588799171,13cyclictest0-21swapper/33
390588799171,12cyclictest0-21swapper/33
390588799170,14cyclictest0-21swapper/33
390588799170,13cyclictest0-21swapper/33
1194472170,2sleep10-21swapper/11
41278052161,2sleep10-21swapper/11
41211452161,3sleep00-21swapper/00
41200242160,8sleep14036141-21diskmemload1
40614752162,9sleep14061505-21munin-run1
390588799169,5cyclictest0-21swapper/33
390588799161,12cyclictest0-21swapper/33
390588799161,12cyclictest0-21swapper/33
390588799160,13cyclictest0-21swapper/33
390588799160,13cyclictest0-21swapper/33
390588799160,13cyclictest0-21swapper/33
390588799160,13cyclictest0-21swapper/33
248362160,1sleep20-21swapper/22
935632151,3sleep24036141-21diskmemload2
91942151,8sleep24036141-21diskmemload2
507512150,1sleep10-21swapper/11
41353612151,2sleep20-21swapper/22
41108822151,2sleep20-21swapper/22
40415132151,3sleep04036141-21diskmemload0
39407482151,10sleep23942074-21cut2
3905887991512,1cyclictest0-21swapper/33
390588799150,13cyclictest0-21swapper/33
390588799150,13cyclictest0-21swapper/33
390588799150,12cyclictest0-21swapper/33
390588799150,12cyclictest0-21swapper/33
95922141,2sleep10-21swapper/11
87792141,3sleep04036141-21diskmemload0
440112141,9sleep044024-21rm0
41450122140,3sleep10-21swapper/11
41019592141,8sleep24036141-21diskmemload2
40844512140,1sleep10-21swapper/11
40525002141,6sleep00-21swapper/00
40138712141,9sleep04013927-21/usr/sbin/munin0
39952782141,9sleep10-21swapper/11
390588799144,7cyclictest0-21swapper/33
390588799141,2cyclictest0-21swapper/33
390588799141,1cyclictest0-21swapper/33
390588799140,12cyclictest0-21swapper/33
390588799140,11cyclictest0-21swapper/33
663362131,6sleep066391-21ntpq0
460362131,4sleep247207-21ssh2
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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