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2025-12-23 - 14:33

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, 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 here to display the system's profile data.
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 20 highest latencies:
System rackfslot7s.osadl.org (updated Tue Dec 23, 2025 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
71646399266613,2650cyclictest767201-21kworker/2:2+events21:50:002
71646899257515,2557cyclictest796242-21kworker/3:2+events23:18:093
71646899251812,2503cyclictest772243-21kworker/3:1+events22:05:133
7164639924947,2484cyclictest744918-21kworker/2:0+events20:54:542
71646399248912,2473cyclictest724314-21kworker/2:1+events19:35:172
71646399248311,2469cyclictest716163-21kworker/2:1+events19:25:472
71645499247212,2457cyclictest733735-21kworker/0:0+events20:12:400
71645499246212,2447cyclictest738668-21kworker/0:2+events20:20:180
71646899245211,2438cyclictest790210-21kworker/3:0+events23:00:163
71646399242712,2413cyclictest761102-21kworker/2:0+events21:45:002
71646899241511,2401cyclictest783534-21kworker/3:1+events22:45:393
71646399240511,2391cyclictest749774-21kworker/2:2+events21:12:422
71646399239812,2384cyclictest749774-21kworker/2:2+events21:00:152
71646899239111,2376cyclictest735399-21kworker/3:0+events20:25:123
71646399238710,2374cyclictest759416-21kworker/2:2+events21:23:212
71645499237212,2356cyclictest802833-21kworker/0:0+events23:50:180
71646899234412,2329cyclictest744886-21kworker/3:0+events20:41:343
71645499232512,2310cyclictest806379-21kworker/0:1+events23:59:020
71646399232411,2309cyclictest804595-21kworker/2:2+events23:52:582
71645499231812,2304cyclictest726004-21kworker/0:2+events19:40:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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