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2026-01-12 - 09:24

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 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 rackcslot7s.osadl.org (updated Mon Jan 12, 2026 00:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7112182910,6sleep013-21ksoftirqd/022:00:020
197399840,63rtkit-daemon0-21swapper/019:05:110
6966072830,5sleep30-21swapper/321:15:303
197399830,7rtkit-daemon927-21gmain22:35:202
197399830,7rtkit-daemon927-21gmain22:35:202
7437652800,6sleep10-21swapper/123:30:291
197399800,5rtkit-daemon0-21swapper/323:55:153
197399760,9rtkit-daemon1972-21rtkit-daemon21:49:522
197399740,9rtkit-daemon652494-21munin-node19:51:392
65047027354,13sleep10-21swapper/119:07:441
197399720,6rtkit-daemon4497-21PK-Backend00:24:563
197399720,5rtkit-daemon0-21swapper/323:51:353
197399720,5rtkit-daemon0-21swapper/323:51:353
65034626445,13sleep20-21swapper/219:06:082
65028126243,13sleep30-21swapper/319:05:283
197399610,9rtkit-daemon1972-21rtkit-daemon19:57:143
197399600,9rtkit-daemon1972-21rtkit-daemon20:16:593
197399590,9rtkit-daemon1972-21rtkit-daemon22:48:393
197399590,9rtkit-daemon1972-21rtkit-daemon20:26:542
7388712580,7chrt4497-21PK-Backend23:17:261
197399570,8rtkit-daemon1972-21rtkit-daemon19:41:453
7137322560,7chrt0-21swapper/222:05:232
65078899560,52cyclictest1972-21rtkit-daemon22:54:373
197399560,9rtkit-daemon1972-21rtkit-daemon22:21:282
650785995520,30cyclictest698746-21systemd-udevd21:23:402
650785995518,32cyclictest704412-21cat21:40:132
197399550,8rtkit-daemon1972-21rtkit-daemon22:41:112
197399540,9rtkit-daemon1972-21rtkit-daemon20:09:452
197399540,8rtkit-daemon1972-21rtkit-daemon21:50:062
197399540,8rtkit-daemon1972-21rtkit-daemon21:50:062
650785995316,32cyclictest736435-21ls23:10:202
65078899520,48cyclictest1972-21rtkit-daemon21:47:223
650785995217,30cyclictest710473-21cat21:55:282
650785995215,32cyclictest438-20systemd-journal19:45:022
650785995215,32cyclictest438-20systemd-journal19:45:022
650785995214,33cyclictest732650-21cat23:00:132
197399520,8rtkit-daemon1972-21rtkit-daemon22:30:412
650785995121,26cyclictest747813-21systemd23:45:012
650785995015,30cyclictest656199-21seq19:22:342
650785995015,30cyclictest656199-21seq19:22:342
650785994920,25cyclictest763620-21/usr/sbin/munin00:30:142
65078599482,41cyclictest923-21dbus-daemon20:40:012
650785994817,26cyclictest690668-21cstates21:00:122
650785994815,28cyclictest689074-21forks20:55:182
65078599481,42cyclictest668221-21sensors_temp19:55:272
650785994813,31cyclictest660535-21hddtemp_smartct19:35:192
650785994812,32cyclictest749911-21expr23:50:132
650785994812,32cyclictest749911-21expr23:50:132
650785994812,32cyclictest1033-21gdbus23:38:172
650785994812,31cyclictest730567-21cat22:55:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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