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2026-07-25 - 06:58

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #4

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 here to display the system's profile data or here to proceed to next system.
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 50 highest latencies:
System rack8slot4s.osadl.org (updated Sat Jul 25, 2026 00:44:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15370032273196,64sleep50-21swapper/519:05:125
15393142243172,23sleep20-21swapper/219:06:552
15394462232172,46sleep40-21swapper/419:08:494
15393922228165,19sleep60-21swapper/619:08:036
15392802226189,24sleep00-21swapper/019:06:280
15392652219185,22sleep30-21swapper/319:06:153
15393462217183,22sleep70-21swapper/719:07:237
15392832216186,20sleep10-21swapper/119:06:291
16821472910,0sleep61682149-21wc23:10:016
153975299260,13cyclictest0-21swapper/719:15:137
153974899260,25cyclictest1617564-21apt-get21:20:125
153974599260,25cyclictest1652519-21dump-pmu-power22:19:594
153973499260,25cyclictest1617109-21cron21:20:000
153974999252,22cyclictest1687996-21run-parts23:20:006
1539748992523,1cyclictest1705667-21sh23:50:015
153974599250,24cyclictest1599836-21apt-get20:50:114
153974599250,24cyclictest0-21swapper/421:20:134
153974399250,24cyclictest1726403-21basename00:25:003
153974399250,24cyclictest1608674-21apt-get21:05:113
153973999250,24cyclictest1726369-21latency_hist00:25:002
153973999250,24cyclictest0-21swapper/219:50:132
1539737992521,3cyclictest1648389-21ntpq22:10:171
153973799250,24cyclictest0-21swapper/120:50:131
153973799250,24cyclictest0-21swapper/120:40:111
153974899240,23cyclictest0-21swapper/519:40:105
1539745992422,1cyclictest1705668-21sh23:50:004
1539743992422,1cyclictest1714577-21sh00:05:013
153973999240,1cyclictest1679144-21basename23:04:592
1539737992423,1cyclictest0-21swapper/121:10:001
153973799240,24cyclictest0-21swapper/123:40:141
153973799240,23cyclictest1661401-21munin-run22:34:591
153973799240,23cyclictest1655898-21dpkg22:25:031
153973799240,23cyclictest1624713-21ntpq21:30:191
153973499240,23cyclictest0-21swapper/023:40:140
1539752992321,1cyclictest1647058-21apt-get22:10:127
153975299230,22cyclictest1664649-21latency_hist22:40:007
153975299230,22cyclictest1631842-21cron21:45:017
1539749992323,0cyclictest0-21swapper/619:20:116
1539749992319,3cyclictest1569933-21idleruntime-cro20:00:006
153974999230,23cyclictest1685028-21cron23:15:006
153974999230,22cyclictest1573311-21apt-get20:05:126
153974999230,22cyclictest0-21swapper/621:45:126
153974999230,22cyclictest0-21swapper/620:50:126
153974899230,2cyclictest1643689-21awk22:05:015
153974899230,22cyclictest1683798-21ntpq23:10:185
153974899230,22cyclictest0-21swapper/523:00:115
153974899230,22cyclictest0-21swapper/521:35:175
153974899230,22cyclictest0-21swapper/519:25:135
1539745992323,0cyclictest0-21swapper/419:40:114
153974599230,22cyclictest1664825-21apt-get22:40:134
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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