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2026-08-04 - 00:56

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 Mon Aug 03, 2026 00:45:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39172582366360,4sleep80-21swapper/819:06:1814
39174972359351,5sleep100-21swapper/1019:08:452
39172152354345,6sleep70-21swapper/719:05:4513
39175052345337,5sleep10-21swapper/119:08:521
39173922341333,5sleep50-21swapper/519:07:3611
39171892341332,6sleep60-21swapper/619:05:2812
39173672339332,5sleep90-21swapper/919:07:2315
39175832332324,5sleep110-21swapper/1119:09:503
39174242330320,7sleep130-21swapper/1319:07:595
39174102325318,4sleep30-21swapper/319:07:509
39175742315306,6sleep20-21swapper/219:09:408
39175022298290,5sleep150-21swapper/1519:08:497
39173912175168,5sleep40-21swapper/419:07:3510
39173712161153,5sleep120-21swapper/1219:07:264
39172222113105,5sleep140-21swapper/1419:05:526
391726728581,2sleep00-21swapper/019:06:270
3918054994522,13cyclictest618698-21WRScene~ilder#120:31:306
3918051994140,1cyclictest0-21swapper/1322:05:165
3918022994140,1cyclictest3904722-1kworker/u33:2+i915_flip23:06:099
3918039994038,2cyclictest4094443-21kworker/u32:0+flush-259:022:25:2015
3918024993937,2cyclictest3998389-21kworker/u32:2+events_unbound21:10:2010
391802299397,32cyclictest511ktimers/321:55:249
3918022993939,0cyclictest4009656-21kworker/3:2-events21:12:469
3918049993838,0cyclictest0-21swapper/1223:04:084
3918012993838,0cyclictest0-21swapper/023:48:270
3918012993838,0cyclictest0-21swapper/023:07:270
3918049993734,2cyclictest3886642-21kworker/u32:4+events_unbound19:45:194
3918022993737,0cyclictest0-21swapper/323:43:589
3918049993636,0cyclictest0-21swapper/1223:48:284
3918024993635,1cyclictest15985-21kworker/u32:4+events_unbound00:20:1210
3918018993632,3cyclictest32974-21kworker/u32:3+flush-259:000:12:228
3918018993631,4cyclictest618598-21thunderbird20:10:228
3918018993631,3cyclictest15985-21kworker/u32:4+flush-259:000:15:128
3918012993634,2cyclictest4124778-21kworker/u32:1+events_unbound22:45:130
3918030993535,0cyclictest0-21swapper/623:24:4212
3918018993531,4cyclictest618598-21thunderbird22:13:268
3918018993531,2cyclictest4094443-21kworker/u32:0+flush-259:022:42:028
3918018993529,4cyclictest4069503-21kworker/u32:3+events_unbound21:59:508
3918018993529,3cyclictest618698-21WRScene~ilder#122:38:038
3918012993534,1cyclictest3998389-21kworker/u32:2+events_unbound20:45:170
3918024993433,1cyclictest3911852-21kworker/u32:0+flush-259:019:20:1810
3918018993428,3cyclictest618698-21WRScene~ilder#120:17:268
3918018993426,5cyclictest15990-21sh23:35:508
391805499337,25cyclictest0-21swapper/1400:00:096
3918054993332,1cyclictest3913200-1kworker/u33:1+i915_flip21:46:476
3918054993332,1cyclictest3913200-1kworker/u33:1+i915_flip21:46:476
3918049993332,1cyclictest4178551-21kworker/12:1-events23:14:054
3918024993333,0cyclictest0-21swapper/423:04:0710
3918022993333,0cyclictest0-21swapper/321:03:599
3918018993329,4cyclictest618698-21WRScene~ilder#123:09:188
3918018993329,4cyclictest618598-21thunderbird23:03:158
3918018993329,4cyclictest618598-21thunderbird00:30:208
3918018993329,2cyclictest618698-21WRScene~ilder#123:22:198
3918018993328,5cyclictest618698-21WRScene~ilder#122:45:188
3918018993328,3cyclictest618598-21thunderbird21:54:208
3918018993328,3cyclictest618598-21thunderbird21:54:208
3918018993328,3cyclictest618598-21thunderbird21:47:408
3918018993328,3cyclictest618598-21thunderbird21:47:398
3918018993328,2cyclictest618698-21WRScene~ilder#122:32:438
3918018993327,3cyclictest618698-21WRScene~ilder#122:53:248
3918018993327,3cyclictest618698-21WRScene~ilder#122:25:208
3918018993327,3cyclictest618698-21WRScene~ilder#121:22:058
391801899330,31cyclictest618598-21thunderbird22:59:398
3918012993333,0cyclictest0-21swapper/023:26:170
3918012993333,0cyclictest0-21swapper/022:31:270
3918049993232,0cyclictest0-21swapper/1221:41:584
3918049993232,0cyclictest0-21swapper/1221:41:574
3918049993232,0cyclictest0-21swapper/1221:29:444
3918049993232,0cyclictest0-21swapper/1200:09:424
3918049993231,1cyclictest4051588-21kworker/u32:4+events_unbound21:35:264
391804399320,29cyclictest0-21swapper/1022:10:142
3918036993229,3cyclictest1774-21snmpd21:52:0214
3918036993229,3cyclictest1774-21snmpd21:52:0114
391803699320,32cyclictest0-21swapper/822:53:4414
3918024993232,0cyclictest0-21swapper/422:28:1610
3918024993231,1cyclictest4044470-21ssh21:28:2910
3918022993232,0cyclictest0-21swapper/323:39:269
3918022993232,0cyclictest0-21swapper/322:36:519
3918022993232,0cyclictest0-21swapper/322:04:129
3918022993232,0cyclictest0-21swapper/319:35:269
3918018993229,3cyclictest782-21systemd-journal23:53:258
3918018993229,3cyclictest618698-21WRScene~ilder#121:14:308
3918018993228,4cyclictest618598-21thunderbird21:27:478
3918018993228,4cyclictest618598-21thunderbird00:20:278
3918018993228,1cyclictest618698-21WRScene~ilder#123:30:468
3918018993227,2cyclictest618698-21WRScene~ilder#100:06:358
3918018993226,3cyclictest618698-21WRScene~ilder#121:01:418
391801899320,32cyclictest0-21swapper/219:21:278
391801899320,30cyclictest618698-21WRScene~ilder#123:10:308
391801899320,30cyclictest3578-21gnome-shell20:39:018
391801899320,29cyclictest4114238-21ssh22:22:228
391801899320,29cyclictest0-21swapper/223:48:458
391801899320,29cyclictest0-21swapper/200:25:248
3918012993232,0cyclictest0-21swapper/000:14:240
3918012993232,0cyclictest0-21swapper/000:05:270
391805499317,13cyclictest0-21swapper/1422:32:176
391805499317,11cyclictest618698-21WRScene~ilder#120:20:306
391805499317,11cyclictest0-21swapper/1421:04:276
391805499316,25cyclictest0-21swapper/1422:10:206
3918049993131,0cyclictest0-21swapper/1220:38:324
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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