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2026-04-14 - 22:29

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #0

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 50 highest latencies:
System r0s0s.osadl.org (updated Tue Apr 14, 2026 12:46:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
34926242301268,26sleep00-21swapper/007:08:450
34926362299278,13sleep30-21swapper/307:08:563
34924662294283,7sleep60-21swapper/607:06:346
34924742293259,26sleep50-21swapper/507:06:405
34924322292259,25sleep10-21swapper/107:06:041
34926782291271,13sleep70-21swapper/707:09:327
34925092286267,12sleep20-21swapper/207:07:092
34924062286267,12sleep40-21swapper/407:05:434
3493189997269,2cyclictest110-21kswapd009:05:375
3493191995753,3cyclictest3553807-21dpkg09:05:387
3493184995453,1cyclictest110-21kswapd009:05:390
3493185995349,2cyclictest3526226-21kworker/u16:4+events_unbound09:05:411
3493191994138,2cyclictest3505116-21kworker/u16:0+events_unbound07:40:227
3493190993630,5cyclictest3641181-21cat12:00:146
3493190993630,5cyclictest3641181-21cat12:00:136
3493189993630,5cyclictest449069-21snmpd10:54:185
3493190993530,4cyclictest449069-21snmpd08:07:396
3493184993535,0cyclictest0-21swapper/010:29:550
349318999340,33cyclictest0-21swapper/508:01:035
3493190993330,2cyclictest449069-21snmpd12:39:506
3493190993330,2cyclictest449069-21snmpd10:27:526
3493190993330,2cyclictest449069-21snmpd10:20:496
3493190993330,2cyclictest3547437-21cat08:55:176
349319099330,30cyclictest0-21swapper/611:51:286
3493189993330,2cyclictest449069-21snmpd11:38:215
3493189993330,2cyclictest449069-21snmpd07:14:505
349318999330,30cyclictest0-21swapper/512:07:045
3493188993330,2cyclictest449069-21snmpd09:56:284
3493188993330,2cyclictest3522126-21cat08:05:144
349318899330,30cyclictest0-21swapper/407:10:354
3493187993330,2cyclictest449069-21snmpd11:21:593
3493187993330,2cyclictest449069-21snmpd10:39:193
3493187993330,2cyclictest449069-21snmpd09:45:593
349318799330,30cyclictest0-21swapper/312:12:103
3493191993230,2cyclictest449069-21snmpd08:50:587
349319199320,31cyclictest0-21swapper/708:10:517
349319199320,31cyclictest0-21swapper/708:10:507
3493190993230,1cyclictest449069-21snmpd12:33:216
3493190993230,1cyclictest449069-21snmpd10:39:076
3493190993229,2cyclictest449069-21snmpd11:59:586
3493189993230,1cyclictest449069-21snmpd12:10:525
3493189993229,2cyclictest449069-21snmpd12:21:015
3493189993229,2cyclictest449069-21snmpd11:30:285
3493189993229,2cyclictest449069-21snmpd10:22:225
3493189993229,2cyclictest449069-21snmpd08:53:415
3493189993229,2cyclictest449069-21snmpd08:12:485
3493189993229,2cyclictest449069-21snmpd08:12:485
3493189993227,4cyclictest449069-21snmpd10:58:535
349318999320,31cyclictest0-21swapper/512:26:435
349318999320,31cyclictest0-21swapper/510:13:255
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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