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2026-09-23 - 02:45

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 Wed Sep 23, 2026 00:46:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35981522379322,33sleep70-21swapper/719:08:3913
35979122376369,5sleep150-21swapper/1519:05:507
35969832376368,5sleep50-21swapper/519:05:2311
35980102374354,13sleep110-21swapper/1119:07:073
35980322363346,11sleep140-21swapper/1419:07:266
35980112358320,13sleep120-21swapper/1219:07:074
35967682352332,13sleep40-21swapper/419:05:2310
35980372350328,15sleep20-21swapper/219:07:308
35979032349328,14sleep80-21swapper/819:05:4314
35947562349329,13sleep30-21swapper/319:05:069
35981602348326,13sleep130-21swapper/1319:08:455
35980262348326,14sleep100-21swapper/1019:07:222
35978942347327,13sleep10-21swapper/119:05:361
35981222346326,13sleep60-21swapper/619:08:2212
35981022346326,13sleep90-21swapper/919:08:0915
35978932346327,12sleep00-21swapper/019:05:350
3598726994746,1cyclictest0-21swapper/819:40:1614
3598726994543,1cyclictest0-21swapper/821:03:0114
3598720994542,1cyclictest0-21swapper/619:41:4412
3598705994543,2cyclictest3793861-21kworker/u32:0+flush-259:022:35:181
3598715994140,1cyclictest3812276-21kworker/u32:4+events_unbound22:57:5610
3598705994139,1cyclictest3681558-21kworker/u32:3+events_unbound21:10:251
3598705994139,1cyclictest3681558-21kworker/u32:3+events_unbound21:10:251
3598743994040,0cyclictest0-21swapper/1221:05:154
3598743994040,0cyclictest0-21swapper/1221:05:144
3598733994038,1cyclictest3694111-21kworker/u32:1+events_unbound21:05:182
3598733994038,1cyclictest3694111-21kworker/u32:1+events_unbound21:05:182
3598715994038,2cyclictest3889647-21kworker/u32:4+flush-259:000:15:2010
3598715994038,2cyclictest3889647-21kworker/u32:4+flush-259:000:15:1910
3598743993939,0cyclictest3928280-21kworker/12:2-mm_percpu_wq00:23:314
3598743993939,0cyclictest3928280-21kworker/12:2-mm_percpu_wq00:23:314
3598743993939,0cyclictest0-21swapper/1223:34:504
3598743993939,0cyclictest0-21swapper/1222:34:514
3598743993939,0cyclictest0-21swapper/1221:43:014
3598743993939,0cyclictest0-21swapper/1221:26:134
3598743993939,0cyclictest0-21swapper/1220:19:414
3598708993939,0cyclictest0-21swapper/222:18:558
359874999380,13cyclictest0-21swapper/1421:21:036
3598743993838,0cyclictest0-21swapper/1221:39:034
3598743993838,0cyclictest0-21swapper/1219:44:534
3598743993838,0cyclictest0-21swapper/1200:19:354
3598743993838,0cyclictest0-21swapper/1200:19:354
3598743993838,0cyclictest0-21swapper/1200:12:304
3598743993838,0cyclictest0-21swapper/1200:12:294
359870899389,29cyclictest0-21swapper/221:36:338
359870899389,0cyclictest0-21swapper/223:04:078
3598708993838,0cyclictest3902834-21kworker/2:0-events00:27:578
3598708993838,0cyclictest0-21swapper/223:32:298
3598708993838,0cyclictest0-21swapper/221:22:538
3598743993737,0cyclictest0-21swapper/1222:39:054
3598743993737,0cyclictest0-21swapper/1220:45:554
3598708993737,0cyclictest0-21swapper/200:31:278
3598708993711,26cyclictest0-21swapper/221:17:478
3598743993636,0cyclictest0-21swapper/1220:43:474
3598743993636,0cyclictest0-21swapper/1220:21:034
3598743993610,26cyclictest0-21swapper/1222:57:374
3598720993633,3cyclictest0-21swapper/622:16:1512
3598713993635,1cyclictest3610512-21kworker/u32:0+flush-259:019:41:509
359870899369,27cyclictest0-21swapper/223:49:158
3598708993635,1cyclictest3807215-21kworker/2:1-events23:05:498
3598708993635,1cyclictest0-21swapper/220:38:378
359874399355,30cyclictest0-21swapper/1219:10:154
3598743993535,0cyclictest0-21swapper/1222:03:434
3598743993535,0cyclictest0-21swapper/1220:53:574
3598726993534,1cyclictest3837737-21kworker/u32:5+events_unbound23:00:3014
3598720993533,1cyclictest0-21swapper/619:46:2412
359870899355,29cyclictest0-21swapper/223:20:178
3598708993535,0cyclictest0-21swapper/223:55:538
3598708993535,0cyclictest0-21swapper/223:40:338
3598708993533,1cyclictest0-21swapper/220:32:198
359870899352,1cyclictest0-21swapper/222:59:138
3598743993434,0cyclictest0-21swapper/1223:46:034
3598743993434,0cyclictest0-21swapper/1219:51:554
3598720993434,0cyclictest0-21swapper/623:29:5712
3598720993434,0cyclictest0-21swapper/621:31:3212
359870899347,27cyclictest0-21swapper/220:00:538
359870899345,29cyclictest0-21swapper/222:04:318
359870899345,29cyclictest0-21swapper/219:57:458
359870899345,1cyclictest0-21swapper/200:39:238
359870899345,0cyclictest0-21swapper/221:29:348
3598708993434,0cyclictest0-21swapper/222:48:418
3598708993434,0cyclictest0-21swapper/221:32:418
3598708993434,0cyclictest0-21swapper/220:53:428
359870899341,1cyclictest211rcu_preempt23:16:158
3598705993426,1cyclictest0-21swapper/119:55:151
3598743993333,0cyclictest0-21swapper/1220:36:274
3598743993333,0cyclictest0-21swapper/1220:33:554
3598743993333,0cyclictest0-21swapper/1219:46:314
359874399330,30cyclictest133-21ksoftirqd/1222:15:144
3598733993332,1cyclictest0-21swapper/1019:45:012
3598733993332,0cyclictest0-21swapper/1020:24:072
3598720993333,0cyclictest0-21swapper/623:56:4112
3598720993333,0cyclictest0-21swapper/621:04:1512
3598715993332,1cyclictest3594759-21kworker/u32:1+events_unbound19:20:2010
359870899337,22cyclictest0-21swapper/219:10:008
359870899336,0cyclictest0-21swapper/219:41:418
359870899334,0cyclictest0-21swapper/223:14:378
359870899334,0cyclictest0-21swapper/221:48:568
359870899334,0cyclictest0-21swapper/220:47:338
359870899334,0cyclictest0-21swapper/220:09:338
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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