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2026-07-21 - 10:05

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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 rack0slot4s.osadl.org (updated Tue Jul 21, 2026 00:45:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
343567027454,1sleep10-21swapper/119:09:281
3436181995823,11cyclictest618598-21thunderbird22:58:406
343566425553,1sleep130-21swapper/1319:09:235
343559525351,1sleep140-21swapper/1419:08:366
343570525048,1sleep80-21swapper/819:09:5114
343558025048,1sleep50-21swapper/519:08:2811
3436177994646,0cyclictest0-21swapper/1323:31:055
3436145994645,1cyclictest3667067-21kworker/u32:2+events_unbound23:11:538
343618199457,25cyclictest0-21swapper/1420:02:566
343618199446,25cyclictest0-21swapper/1423:20:386
343618199446,25cyclictest0-21swapper/1422:36:426
3436171994443,1cyclictest3503025-21kworker/u32:3+events_unbound20:50:353
418998430,41rtkit-daemon0-21swapper/1119:06:103
3436145994343,0cyclictest0-21swapper/220:57:298
343536024341,1sleep40-21swapper/419:06:0310
343217824341,1sleep30-21swapper/319:05:149
343618199424,25cyclictest0-21swapper/1421:30:486
343618199424,25cyclictest0-21swapper/1420:13:556
3436145994241,1cyclictest618598-21thunderbird20:05:428
3436177994140,1cyclictest3692714-21kworker/u32:4+events_unbound23:20:195
3436145994140,1cyclictest618698-21WRScene~ilder#121:08:448
3436145994140,1cyclictest618598-21thunderbird23:46:228
3436145994140,1cyclictest618598-21thunderbird19:53:528
3436145994140,1cyclictest3425749-21kworker/u32:3+events_unbound19:17:138
3436145994139,0cyclictest0-21swapper/223:43:098
343554024139,1sleep70-21swapper/719:07:5813
3436156994037,2cyclictest3607487-21kworker/u32:1+events_unbound22:35:1612
3436147994039,1cyclictest3503025-21kworker/u32:3+flush-259:021:20:209
3436147994039,1cyclictest3503025-21kworker/u32:3+flush-259:021:20:199
343614599406,32cyclictest618598-21thunderbird22:20:118
3436145994039,1cyclictest618698-21WRScene~ilder#120:04:568
3436145994039,1cyclictest618598-21thunderbird20:47:368
3436145994039,1cyclictest618598-21thunderbird20:41:318
3436145994039,1cyclictest3567827-21kworker/u32:2+events_unbound21:55:058
3436145994038,2cyclictest618598-21thunderbird23:17:158
3436145994038,2cyclictest618598-21thunderbird20:28:008
3436145994037,3cyclictest618598-21thunderbird22:12:558
3436145994037,3cyclictest3723635-21sh23:31:498
3436145994034,3cyclictest3578-21gnome-shell19:57:268
343545524038,1sleep120-21swapper/1219:06:594
3436177993938,1cyclictest0-21swapper/1320:06:175
3436171993939,0cyclictest0-21swapper/1120:05:113
3436145993938,1cyclictest618698-21WRScene~ilder#119:28:458
3436145993938,1cyclictest618680-21Compositor00:06:068
3436145993938,1cyclictest618598-21thunderbird21:33:248
3436145993938,1cyclictest618598-21thunderbird21:25:488
3436145993938,1cyclictest618598-21thunderbird21:25:478
3436145993938,1cyclictest618598-21thunderbird21:17:568
3436145993938,1cyclictest618598-21thunderbird20:35:328
3436145993938,1cyclictest618598-21thunderbird19:40:208
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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