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2026-08-31 - 22:18

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 31, 2026 00:46:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38437992372365,5sleep50-21swapper/519:05:0511
38470722370331,12sleep90-21swapper/919:06:4715
38470882362323,14sleep70-21swapper/719:07:0113
38470872362325,29sleep60-21swapper/619:07:0012
38438102360351,6sleep80-21swapper/819:05:0914
38472892357320,13sleep140-21swapper/1419:09:336
38471022354334,13sleep150-21swapper/1519:07:097
38472752353332,14sleep10-21swapper/119:09:201
38470932352332,13sleep120-21swapper/1219:07:054
38470912351331,13sleep100-21swapper/1019:07:042
38469592351331,13sleep20-21swapper/219:05:358
38472372350331,13sleep110-21swapper/1119:08:573
38470832349327,14sleep30-21swapper/319:06:579
38470842348328,13sleep40-21swapper/419:06:5710
38434032347326,14sleep00-21swapper/019:05:010
38470582343324,12sleep130-21swapper/1319:06:355
384772699426,11cyclictest3910055-21ntp_states20:20:216
3847689994139,1cyclictest3958637-21kworker/u32:5+flush-259:021:20:168
3847726993939,0cyclictest0-21swapper/1422:23:436
384772699393,25cyclictest0-21swapper/1421:26:146
384772699393,11cyclictest0-21swapper/1421:37:136
384772699393,11cyclictest0-21swapper/1400:32:586
384768999390,1cyclictest211rcu_preempt22:23:438
3847689993838,0cyclictest4191889-21ssh00:19:578
3847689993838,0cyclictest4191889-21ssh00:19:578
3847689993836,2cyclictest0-21swapper/222:45:238
3847707993635,0cyclictest0-21swapper/821:35:1614
3847689993636,0cyclictest0-21swapper/223:25:178
3847689993635,1cyclictest4047345-21irqstats_NMI22:25:178
3847689993635,1cyclictest3952082-21expr21:10:218
3847689993635,1cyclictest3952082-21expr21:10:208
3847689993634,2cyclictest1769-21arpwatch21:26:218
3847689993633,3cyclictest0-21swapper/200:09:178
384772099355,30cyclictest0-21swapper/1200:39:274
3847705993512,1cyclictest0-21swapper/722:29:0213
3847689993535,0cyclictest0-21swapper/223:45:438
3847689993534,1cyclictest4037530-21ssh22:18:158
3847689993534,1cyclictest4009500-21ssh21:55:198
3847689993532,3cyclictest0-21swapper/222:57:318
3847689993531,2cyclictest0-21swapper/223:56:298
3847689993529,2cyclictest211rcu_preempt23:37:378
3847726993410,11cyclictest0-21swapper/1400:00:016
3847720993434,0cyclictest0-21swapper/1200:23:334
3847720993434,0cyclictest0-21swapper/1200:23:334
3847689993433,1cyclictest3998941-21kworker/u32:2+events_unbound22:13:458
3847689993432,2cyclictest0-21swapper/221:30:078
3847689993431,3cyclictest0-21swapper/200:27:318
3847689993431,3cyclictest0-21swapper/200:01:018
384768999343,0cyclictest0-21swapper/223:40:518
3847689993430,3cyclictest3922377-21sed20:35:188
3847689993428,3cyclictest3884988-21ntpq19:50:208
384768999341,30cyclictest3951693-21kworker/2:1-events21:35:458
384768999340,33cyclictest4050038-21kworker/2:1-mm_percpu_wq22:42:368
384768999340,31cyclictest3906051-21sendmail_mailqu20:15:218
384772699339,11cyclictest0-21swapper/1422:10:116
384772699339,10cyclictest0-21swapper/1400:21:596
384772699339,10cyclictest0-21swapper/1400:21:596
384772699339,0cyclictest0-21swapper/1421:04:166
384772699332,30cyclictest0-21swapper/1400:39:276
3847701993329,1cyclictest1774-21snmpd21:56:0512
3847689993333,0cyclictest0-21swapper/223:10:158
3847689993332,1cyclictest0-21swapper/223:22:478
3847689993331,2cyclictest0-21swapper/223:52:238
3847689993331,2cyclictest0-21swapper/222:51:078
3847689993331,2cyclictest0-21swapper/222:00:138
3847689993331,2cyclictest0-21swapper/219:38:468
3847689993331,0cyclictest0-21swapper/200:20:158
3847689993331,0cyclictest0-21swapper/200:20:158
3847689993330,3cyclictest0-21swapper/222:09:198
384768999330,3cyclictest3948926-21diskmemload23:09:418
384768999330,31cyclictest4158779-21kworker/2:1+mm_percpu_wq00:10:218
384768999330,31cyclictest4158779-21kworker/2:1+mm_percpu_wq00:10:218
384768999330,31cyclictest4050038-21kworker/2:1+mm_percpu_wq23:01:018
384768999330,30cyclictest4050038-21kworker/2:1+mm_percpu_wq22:37:358
3847728993230,2cyclictest4086000-21kworker/u32:0+flush-259:023:10:157
3847726993232,0cyclictest0-21swapper/1421:20:576
3847720993231,1cyclictest426-1kworker/12:1H+kblockd19:59:544
384769999320,29cyclictest0-21swapper/523:35:1611
384769699320,29cyclictest0-21swapper/419:50:1310
3847689993232,0cyclictest0-21swapper/221:16:278
3847689993232,0cyclictest0-21swapper/221:16:268
3847689993231,1cyclictest0-21swapper/221:45:518
3847689993230,2cyclictest23766-21ssh00:39:158
3847689993230,0cyclictest0-21swapper/200:30:118
3847689993229,3cyclictest0-21swapper/223:31:198
3847689993229,3cyclictest0-21swapper/221:50:238
384768999322,29cyclictest0-21swapper/222:30:298
384768999322,1cyclictest3762077-21kworker/2:0-events19:10:238
384768999321,31cyclictest0-21swapper/223:16:138
384772899310,28cyclictest0-21swapper/1521:25:167
384772699317,13cyclictest0-21swapper/1423:05:056
3847726993131,0cyclictest0-21swapper/1423:11:116
3847726993131,0cyclictest0-21swapper/1421:17:356
3847726993131,0cyclictest0-21swapper/1421:17:346
3847726993131,0cyclictest0-21swapper/1400:25:256
3847726993130,1cyclictest3898376-21kworker/u32:4+flush-259:021:05:186
3847726993130,1cyclictest1774-21snmpd22:59:116
3847726993130,1cyclictest0-21swapper/1423:24:446
384772299310,30cyclictest0-21swapper/1320:20:505
3847720993130,1cyclictest3931850-21kworker/u32:0+events_unbound21:10:144
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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