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2026-07-21 - 17:40

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 100 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
3436145993938,1cyclictest618598-21thunderbird19:37:578
3436145993938,1cyclictest618598-21thunderbird19:21:488
3436145993937,0cyclictest0-21swapper/222:29:518
3436145993936,3cyclictest618698-21WRScene~ilder#121:21:498
3436145993936,3cyclictest618698-21WRScene~ilder#121:21:488
3436145993936,3cyclictest618598-21thunderbird23:51:278
3436145993936,1cyclictest618698-21WRScene~ilder#119:30:168
3436139993938,1cyclictest3427184-1kworker/u33:1+i915_flip23:50:410
3436139993938,1cyclictest0-21swapper/023:43:170
343559823935,3sleep00-21swapper/019:08:390
3436182993837,1cyclictest0-21swapper/1521:20:157
3436182993837,1cyclictest0-21swapper/1521:20:147
3436181993814,13cyclictest0-21swapper/1423:09:396
3436177993838,0cyclictest0-21swapper/1300:26:055
3436177993838,0cyclictest0-21swapper/1300:26:055
3436177993837,1cyclictest3667067-21kworker/u32:2+events_unbound23:00:155
343614599388,2cyclictest618598-21thunderbird20:30:418
3436145993838,0cyclictest0-21swapper/200:02:238
3436145993837,1cyclictest618698-21WRScene~ilder#121:43:078
3436145993837,1cyclictest618623-21Socket12:05:318
3436145993837,1cyclictest618598-21thunderbird22:53:498
3436145993837,1cyclictest618598-21thunderbird22:16:538
3436145993837,1cyclictest618598-21thunderbird21:02:518
3436145993837,1cyclictest618598-21thunderbird20:13:578
3436145993837,1cyclictest618598-21thunderbird00:20:278
3436145993837,1cyclictest618598-21thunderbird00:20:268
3436145993837,1cyclictest1769-21arpwatch22:00:158
3436145993836,2cyclictest618598-21thunderbird23:55:528
3436145993836,2cyclictest618598-21thunderbird22:49:008
3436145993835,3cyclictest618698-21WRScene~ilder#122:09:558
343614599380,33cyclictest43-21ksoftirqd/200:17:018
343614599380,33cyclictest43-21ksoftirqd/200:17:008
3436141993836,2cyclictest3414578-21kworker/u32:0+flush-259:019:15:021
3436139993838,0cyclictest3352258-21kworker/0:0+events20:05:420
343529823836,1sleep20-21swapper/219:05:288
3436182993736,1cyclictest0-21swapper/1520:12:267
3436182993735,2cyclictest3477759-21kworker/u32:0+events_unbound20:00:267
3436182993728,8cyclictest3503025-21kworker/u32:3-flush-259:020:57:297
3436177993737,0cyclictest0-21swapper/1323:37:595
3436177993737,0cyclictest0-21swapper/1321:48:295
3436145993736,1cyclictest618619-21glean.dispatche21:11:238
3436145993736,1cyclictest618598-21thunderbird23:03:238
3436145993736,1cyclictest618598-21thunderbird21:35:358
3436145993736,1cyclictest3495362-21kworker/u32:2+events_unbound20:50:158
3436145993736,1cyclictest1769-21arpwatch22:57:088
3436145993735,2cyclictest3607487-21kworker/u32:1+events_unbound23:05:158
3436145993735,2cyclictest0-21swapper/200:37:358
3436145993734,3cyclictest618598-21thunderbird21:45:058
3436145993734,1cyclictest618598-21thunderbird21:50:138
3436139993737,0cyclictest0-21swapper/021:10:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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