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2025-12-16 - 13:42

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 Tue Dec 16, 2025 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28688442236174,21sleep60-21swapper/619:09:186
28687662230169,19sleep30-21swapper/319:08:103
28686342224162,19sleep40-21swapper/419:06:184
28686672218185,21sleep10-21swapper/119:06:481
28688542212182,19sleep70-21swapper/719:09:277
28687432209163,15sleep00-21swapper/019:07:510
28688582208181,17sleep20-21swapper/219:09:292
28687862200170,20sleep50-21swapper/519:08:285
2869285992826,1cyclictest0-21swapper/020:25:000
286929099270,26cyclictest0-21swapper/121:50:131
2869304992520,4cyclictest0-21swapper/522:45:145
286930499250,24cyclictest0-21swapper/521:10:155
2869290992522,2cyclictest3027883-21latency_hist23:44:591
286928599250,1cyclictest0-21swapper/000:15:010
286931199240,23cyclictest2959499-21apt-get21:45:137
286931199240,23cyclictest2913104-21idleruntime-cro20:25:007
286931199240,23cyclictest0-21swapper/720:30:137
286930799240,23cyclictest0-21swapper/621:20:156
2869304992421,3cyclictest0-21swapper/500:25:005
2869304992421,2cyclictest3027885-21dump-pmu-power23:45:005
2869304992420,4cyclictest0-21swapper/519:55:135
2869299992422,1cyclictest2950662-21apt-get21:30:134
286929599240,23cyclictest2907373-21idleruntime-cro20:15:003
2869290992421,3cyclictest0-21swapper/119:55:131
286928599240,23cyclictest0-21swapper/021:45:120
286931199230,22cyclictest0-21swapper/723:45:007
286931199230,22cyclictest0-21swapper/721:35:137
286931199230,22cyclictest0-21swapper/720:00:007
2869307992321,1cyclictest3010468-21apt-get23:15:016
2869307992321,1cyclictest0-21swapper/623:30:136
286930799230,1cyclictest2889998-21munin-run19:45:006
2869304992320,2cyclictest2887136-21run-parts19:40:005
2869304992317,1cyclictest0-21swapper/520:40:005
286930499230,22cyclictest0-21swapper/521:00:145
286930499230,22cyclictest0-21swapper/521:00:135
286930499230,0cyclictest0-21swapper/520:10:135
286929999230,22cyclictest0-21swapper/420:25:004
2869295992323,0cyclictest0-21swapper/321:00:143
2869295992323,0cyclictest0-21swapper/321:00:143
2869295992323,0cyclictest0-21swapper/320:55:143
2869295992323,0cyclictest0-21swapper/320:55:143
2869295992321,1cyclictest2985199-21apt-get22:30:143
2869295992320,2cyclictest363-21systemd-journal21:40:013
286929599230,22cyclictest0-21swapper/319:45:123
286929599230,21cyclictest0-21swapper/322:05:143
2869292992321,1cyclictest3039769-21apt-get00:05:142
286929299230,22cyclictest0-21swapper/220:40:142
286929299230,22cyclictest0-21swapper/200:40:002
286929299230,1cyclictest3042619-21apt-get00:10:132
2869290992321,1cyclictest0-21swapper/119:40:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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