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2026-08-06 - 20:22

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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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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.

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 highest latencies:
System rack7slot3s.osadl.org (updated Thu Aug 06, 2026 03:36:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7177999217,5cyclictest22685-21switchtime03:06:000
718099752,23cyclictest11955-21grep02:40:563
7177997317,4cyclictest7950irq/56-dwc_otg_02:40:510
717799701,22cyclictest0-21swapper/002:59:330
718099694,6cyclictest8050irq/56-dwc_otg_03:30:423
7177996712,11cyclictest0-21swapper/003:22:220
718099653,7cyclictest22358-21wc03:05:523
7177996516,5cyclictest7950irq/56-dwc_otg_03:30:580
67282653,12sleep10-21swapper/102:28:181
7178996410,32cyclictest0-21swapper/103:15:411
7177996421,3cyclictest0-21swapper/003:14:260
7178996314,16cyclictest1-21systemd03:00:031
7177996016,4cyclictest0-21swapper/003:15:550
717799601,15cyclictest0-21swapper/002:49:300
717799601,15cyclictest0-21swapper/002:49:300
67062603,11sleep20-21swapper/202:28:022
7178995913,23cyclictest21866-21aten_rbpower_cu03:05:451
7177995913,4cyclictest7850irq/56-dwc_otg02:50:450
7178995710,29cyclictest0-21swapper/102:45:421
7178995710,29cyclictest0-21swapper/102:45:421
7178995619,21cyclictest11425-21/usr/sbin/munin02:40:481
717799564,10cyclictest9166-21aten_rbpower_vo02:35:440
717799562,15cyclictest0-21swapper/003:03:200
717799561,18cyclictest30574-21runrttasks03:27:520
717999559,29cyclictest0-21swapper/203:10:432
7178995414,23cyclictest30595-21chrt03:28:101
194922520,5sleep2717999cyclictest03:00:282
717999498,27cyclictest0-21swapper/203:15:412
7179994816,21cyclictest29-21rcuc/203:05:552
7178994811,25cyclictest28720-21seq03:22:171
717999478,24cyclictest0-21swapper/202:40:412
7177994710,14cyclictest0-21swapper/002:32:540
718099467,12cyclictest21513-20Xorg03:10:473
7179994626,5cyclictest28995-21idleruntime-cro03:25:302
717899467,25cyclictest0-21swapper/103:00:431
7178994610,16cyclictest8767-21cron02:35:291
7180994530,12cyclictest21513-20Xorg03:15:403
717999456,24cyclictest0-21swapper/203:00:432
717999452,9cyclictest0-21swapper/202:30:412
67142453,34sleep00-21swapper/002:28:090
7178994417,12cyclictest31384-21idleruntime03:30:471
7178994410,5cyclictest7850irq/56-dwc_otg03:10:431
7178994214,14cyclictest9795-21/usr/sbin/munin02:35:541
7180993816,13cyclictest39-21ksoftirqd/303:00:273
717899387,10cyclictest7850irq/56-dwc_otg02:52:131
7179993717,4cyclictest31-21ksoftirqd/203:30:402
718099368,11cyclictest7950irq/56-dwc_otg_02:50:533
718099361,28cyclictest8050irq/56-dwc_otg_02:35:513
717999366,14cyclictest7950irq/56-dwc_otg_02:50:372
718099343,14cyclictest8050irq/56-dwc_otg_03:00:323
718099337,15cyclictest8050irq/56-dwc_otg_02:45:423
718099337,15cyclictest8050irq/56-dwc_otg_02:45:423
718099331,7cyclictest8351-21grep02:30:573
7179993312,16cyclictest0-21swapper/202:45:422
7179993312,16cyclictest0-21swapper/202:45:422
718099316,5cyclictest7850irq/56-dwc_otg03:25:443
718099301,21cyclictest27719-21uniq03:20:463
717999306,15cyclictest0-21swapper/203:25:422
64082293,13sleep30-21swapper/302:25:573
717999271,18cyclictest0-21swapper/202:39:532
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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