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2026-08-28 - 16:43

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 Fri Aug 28, 2026 00:46:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38533132423406,11sleep150-21swapper/1519:08:317
38516592403397,4sleep110-21swapper/1119:05:463
38533442361321,14sleep60-21swapper/619:08:5412
38533452357336,14sleep70-21swapper/719:08:5613
38531962357350,5sleep30-21swapper/319:06:599
38533932353333,13sleep100-21swapper/1019:09:312
38531432352333,12sleep20-21swapper/219:06:268
38533692351331,13sleep80-21swapper/819:09:1314
38516572350310,14sleep90-21swapper/919:05:4415
38534132348327,14sleep40-21swapper/419:09:4110
38533652348329,12sleep50-21swapper/519:09:0911
38532762348329,13sleep140-21swapper/1419:07:576
38532192348329,12sleep10-21swapper/119:07:131
38532102346327,12sleep120-21swapper/1219:07:084
38532752343323,13sleep130-21swapper/1319:07:565
38499112343322,14sleep00-21swapper/019:05:030
41353102580,0sleep110-21swapper/1123:29:063
3853935993837,1cyclictest3853239-21kworker/u32:2+events_unbound19:15:0114
3853913993733,2cyclictest3957542-21kworker/u32:3+events_unbound21:10:278
3853913993634,2cyclictest0-21swapper/223:29:498
3853945993535,0cyclictest0-21swapper/1122:52:233
3853945993534,1cyclictest4010947-21kworker/u32:6+events_unbound22:15:153
385395599349,25cyclictest0-21swapper/1419:39:576
3853945993434,0cyclictest0-21swapper/1123:13:433
3853942993432,1cyclictest4162232-21kworker/u32:2+events_unbound00:15:172
3853913993432,2cyclictest3965543-21kworker/u32:5+flush-259:021:17:458
3853945993333,0cyclictest0-21swapper/1100:09:283
3853945993331,1cyclictest4180367-21kworker/11:0+mm_percpu_wq00:35:053
3853935993333,0cyclictest0-21swapper/821:39:2314
3853935993333,0cyclictest0-21swapper/821:27:1714
3853935993332,1cyclictest3965543-21kworker/u32:5-events_unbound22:20:4214
3853913993321,12cyclictest782-21systemd-journal22:29:598
385395599320,19cyclictest0-21swapper/1419:50:566
385394599324,28cyclictest0-21swapper/1121:35:473
3853945993232,0cyclictest0-21swapper/1122:55:523
3853945993232,0cyclictest0-21swapper/1122:05:233
3853945993232,0cyclictest0-21swapper/1122:05:233
3853945993232,0cyclictest0-21swapper/1119:53:293
3853945993231,1cyclictest3815451-21kworker/u32:1+events_unbound19:10:183
3853945993230,1cyclictest1221rcuc/1122:01:293
3853945993230,1cyclictest1221rcuc/1122:01:293
3853942993226,1cyclictest3959381-21kworker/10:2+events22:16:552
385393999320,1cyclictest0-21swapper/920:13:0415
3853935993232,0cyclictest0-21swapper/822:05:2314
3853935993232,0cyclictest0-21swapper/822:05:2314
3853935993229,3cyclictest951rcuc/822:52:5914
385391799320,29cyclictest0-21swapper/320:00:149
385391399323,0cyclictest0-21swapper/221:26:478
3853913993229,3cyclictest1769-21arpwatch23:05:258
3853913993229,3cyclictest0-21swapper/200:02:138
3853913993228,4cyclictest3891964-21kworker/u32:5+flush-259:019:51:018
385395299310,30cyclictest0-21swapper/1322:20:595
3853950993130,1cyclictest4105939-21ethtool23:05:164
3853950993130,1cyclictest1774-21snmpd00:03:134
385394599313,28cyclictest0-21swapper/1122:37:513
3853945993131,0cyclictest0-21swapper/1119:28:563
3853945993130,1cyclictest4109141-21kworker/u32:1+events_unbound23:15:193
3853942993130,1cyclictest4101554-21kworker/10:1+events23:20:172
3853942993130,1cyclictest4101554-21kworker/10:1+events00:05:212
3853942993130,1cyclictest3959381-21kworker/10:2+events22:36:132
3853942993129,1cyclictest4101554-21kworker/10:1+events23:38:392
3853942993124,1cyclictest4101554-21kworker/10:1+events23:49:392
385393999310,30cyclictest4102722-21ssh23:03:3315
3853935993131,0cyclictest0-21swapper/800:04:1714
3853935993130,1cyclictest4175116-21kworker/8:1+mm_percpu_wq00:09:2914
3853935993130,1cyclictest3973146-21kworker/u32:1+flush-259:021:45:2014
3853935993130,1cyclictest0-21swapper/821:41:5714
3853935993129,1cyclictest4069328-21kworker/u32:2+events_unbound22:55:1514
3853935993129,1cyclictest211rcu_preempt00:39:5714
385393299310,30cyclictest0-21swapper/720:37:0813
385392599310,28cyclictest0-21swapper/521:15:1611
3853921993130,1cyclictest4176886-21mii-tool00:00:1610
3853917993130,1cyclictest1774-21snmpd23:34:579
3853913993130,1cyclictest4010947-21kworker/u32:6+events_unbound22:20:208
3853913993127,3cyclictest4172196-21kworker/u32:0+events_unbound00:39:298
3853913993126,4cyclictest1769-21arpwatch00:17:158
385391199310,30cyclictest0-21swapper/121:59:041
385391199310,30cyclictest0-21swapper/120:20:011
385391199310,30cyclictest0-21swapper/120:08:421
3853907993130,1cyclictest1774-21snmpd22:59:380
385390799310,30cyclictest0-21swapper/023:57:520
385390799310,30cyclictest0-21swapper/019:12:530
385396099300,30cyclictest0-21swapper/1523:45:167
3853955993029,1cyclictest1774-21snmpd22:44:176
3853955993029,1cyclictest0-21swapper/1400:18:596
385395599300,30cyclictest0-21swapper/1419:42:336
385395599300,27cyclictest0-21swapper/1420:00:156
3853952993029,1cyclictest1774-21snmpd23:14:215
3853952993029,1cyclictest1774-21snmpd22:44:205
385395299300,30cyclictest0-21swapper/1300:25:155
385395299300,30cyclictest0-21swapper/1300:05:525
3853950993029,1cyclictest3907147-21mii-tool20:10:144
3853950993029,1cyclictest1774-21snmpd22:50:014
3853950993029,1cyclictest0-21swapper/1219:35:454
385395099300,30cyclictest0-21swapper/1221:09:184
3853945993030,0cyclictest0-21swapper/1122:48:393
3853945993030,0cyclictest0-21swapper/1120:40:333
3853945993030,0cyclictest0-21swapper/1100:34:373
385394599300,30cyclictest0-21swapper/1123:08:173
385394599300,30cyclictest0-21swapper/1120:01:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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