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2025-12-27 - 07:50

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 Dec 27, 2025 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1538232227195,20sleep10-21swapper/119:08:141
1537682219167,17sleep00-21swapper/019:07:240
1538252216176,25sleep30-21swapper/319:08:153
1536502215188,17sleep60-21swapper/619:05:456
1539062212180,19sleep70-21swapper/719:09:247
1537912209174,22sleep50-21swapper/519:07:455
1536572209176,21sleep40-21swapper/419:05:514
1539482207175,21sleep20-21swapper/219:09:592
15416299312,28cyclictest290404-21turbostat23:05:010
15416899307,22cyclictest264141-21dump-pmu-power22:20:002
15418799270,26cyclictest0-21swapper/720:55:007
15417399270,26cyclictest249594-21apt21:55:003
154164992624,1cyclictest0-21swapper/120:40:121
15418799250,21cyclictest0-21swapper/719:20:127
15418799250,1cyclictest198074-21apt-get20:25:137
154164992525,0cyclictest0-21swapper/121:40:111
15416499251,24cyclictest311rcuc/122:45:151
154187992422,1cyclictest307963-21apt-get23:35:097
154187992422,1cyclictest307963-21apt-get23:35:097
15418499240,1cyclictest316544-21apt-get23:50:146
154182992421,3cyclictest0-21swapper/522:00:125
15418299240,23cyclictest333287-21cut00:20:015
15417799240,23cyclictest174786-21idleruntime-cro19:45:014
15416499244,0cyclictest0-21swapper/123:25:131
154164992423,1cyclictest0-21swapper/120:20:001
154164992423,1cyclictest0-21swapper/100:25:001
15416299240,23cyclictest0-21swapper/000:20:100
15418799236,4cyclictest0-21swapper/700:07:437
15418799230,22cyclictest0-21swapper/722:50:127
15418799230,22cyclictest0-21swapper/720:10:007
15418799230,1cyclictest0-21swapper/720:44:597
154182992321,2cyclictest0-21swapper/523:05:105
154182992319,1cyclictest0-21swapper/519:45:145
15418299230,22cyclictest363-21systemd-journal00:00:015
15418299230,22cyclictest195220-21apt-get20:20:115
15418299230,1cyclictest0-21swapper/521:05:005
15417799231,0cyclictest321903-21cups-browsed00:00:014
15417799230,22cyclictest0-21swapper/422:30:014
15417799230,22cyclictest0-21swapper/421:15:114
15417799230,22cyclictest0-21swapper/419:25:114
15417799230,22cyclictest0-21swapper/400:25:024
154173992323,0cyclictest0-21swapper/319:55:123
154173992321,1cyclictest0-21swapper/323:05:003
15417399230,22cyclictest337144-21apt-get00:25:133
15417399230,22cyclictest333263-21cron00:20:003
15417399230,22cyclictest0-21swapper/322:55:133
15417399230,22cyclictest0-21swapper/322:00:003
15417399230,0cyclictest0-21swapper/319:35:113
15416899230,2cyclictest336472-21perf00:25:002
15416899230,23cyclictest0-21swapper/223:45:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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