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2026-04-28 - 10:36

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 Apr 28, 2026 00:46:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
14727272407402,3sleep20-21swapper/219:09:218
14726192405399,4sleep130-21swapper/1319:07:575
14724692369350,13sleep110-21swapper/1119:06:023
14725782366346,13sleep150-21swapper/1519:07:267
14724902359318,33sleep120-21swapper/1219:06:194
14726842355333,14sleep140-21swapper/1419:08:456
14693012355348,5sleep90-21swapper/919:05:1115
14727102351331,13sleep50-21swapper/519:09:0911
14726932350330,13sleep60-21swapper/619:08:5312
14726132349328,14sleep80-21swapper/819:07:5114
14724482349329,13sleep100-21swapper/1019:05:442
14724962347327,13sleep10-21swapper/119:06:231
14692952346325,14sleep30-21swapper/319:05:059
14727502345325,13sleep00-21swapper/019:09:350
14726122345324,14sleep70-21swapper/719:07:5013
14726722343324,13sleep40-21swapper/419:08:3610
1473308993636,0cyclictest1535441-21kworker/8:0+mm_percpu_wq21:23:0514
1473308993635,1cyclictest0-21swapper/823:30:5614
1473308993635,1cyclictest0-21swapper/823:30:5514
1473308993535,0cyclictest0-21swapper/823:57:1814
1473325993410,24cyclictest1588972-21cstates21:20:136
1473308993434,0cyclictest0-21swapper/823:50:5514
1473308993434,0cyclictest0-21swapper/823:29:1514
147332599339,11cyclictest0-21swapper/1422:59:036
147332599339,11cyclictest0-21swapper/1422:04:086
147332599339,11cyclictest0-21swapper/1419:52:206
1473308993333,0cyclictest0-21swapper/823:05:3014
1473308993333,0cyclictest0-21swapper/822:04:3914
1473308993333,0cyclictest0-21swapper/821:10:5914
1473304993330,1cyclictest0-21swapper/719:40:1513
147332599329,10cyclictest0-21swapper/1420:03:196
1473318993231,1cyclictest1532564-21kworker/u32:2+flush-259:020:25:183
1473318993231,1cyclictest1532564-21kworker/u32:2+flush-259:020:25:173
1473308993232,0cyclictest0-21swapper/820:20:3214
1473308993232,0cyclictest0-21swapper/819:20:2114
1473308993231,1cyclictest1535441-21kworker/8:0-mm_percpu_wq21:03:3114
1473304993231,1cyclictest1688597-21kworker/u32:4+flush-259:022:45:2013
147332599310,30cyclictest0-21swapper/1423:04:176
147332599310,30cyclictest0-21swapper/1400:28:406
147332099310,30cyclictest0-21swapper/1220:25:164
147332099310,30cyclictest0-21swapper/1220:25:154
147332099310,30cyclictest0-21swapper/1200:15:334
147331899310,30cyclictest0-21swapper/1121:11:013
147331899310,30cyclictest0-21swapper/1120:06:563
1473313993129,1cyclictest1646480-21kworker/10:0+events23:50:482
1473313993129,1cyclictest1646480-21kworker/10:0+events23:17:422
1473313993129,1cyclictest1646480-21kworker/10:0+events22:49:232
1473313993129,1cyclictest1646480-21kworker/10:0+events00:34:182
1473313993129,1cyclictest1646480-21kworker/10:0+events00:24:112
1473313993129,1cyclictest1646480-21kworker/10:0+events00:16:062
1473313993129,1cyclictest1646480-21kworker/10:0+events00:14:332
1473313993129,1cyclictest1646480-21kworker/10:0+events00:06:582
1473313993129,1cyclictest1467038-21kworker/10:1+events21:35:592
1473313993129,1cyclictest1467038-21kworker/10:1+events21:27:382
1473313993129,1cyclictest1467038-21kworker/10:1+events19:52:392
1473310993130,1cyclictest1774-21snmpd21:23:3115
147331099310,30cyclictest0-21swapper/923:17:0015
147331099310,30cyclictest0-21swapper/922:10:1415
1473308993131,0cyclictest0-21swapper/822:10:3114
1473308993131,0cyclictest0-21swapper/821:18:0714
1473308993131,0cyclictest0-21swapper/820:34:5514
1473308993131,0cyclictest0-21swapper/820:34:5514
1473308993130,1cyclictest1774-21snmpd23:11:4014
1473289993130,1cyclictest0-21swapper/219:20:388
1473287993130,1cyclictest1774-21snmpd20:45:461
1473287993130,1cyclictest1774-21snmpd19:13:051
1473323993029,1cyclictest1774-21snmpd23:07:295
1473323993029,1cyclictest1774-21snmpd21:50:235
1473323993029,1cyclictest1774-21snmpd21:01:355
1473323993029,1cyclictest1774-21snmpd00:37:475
147332399300,30cyclictest0-21swapper/1300:32:045
1473320993029,1cyclictest1774-21snmpd19:31:314
1473320993028,2cyclictest0-21swapper/1219:55:294
147332099300,30cyclictest0-21swapper/1219:42:294
147332099300,29cyclictest0-21swapper/1223:40:054
147332099300,29cyclictest0-21swapper/1219:52:364
147331899300,30cyclictest0-21swapper/1123:46:233
147331899300,30cyclictest0-21swapper/1120:20:423
1473313993030,0cyclictest1646480-21kworker/10:0+events22:42:142
1473313993030,0cyclictest1467038-21kworker/10:1+events21:46:192
1473313993030,0cyclictest1467038-21kworker/10:1+events20:06:322
1473313993030,0cyclictest1467038-21kworker/10:1+events19:41:382
1473313993029,1cyclictest1646480-21kworker/10:0+events23:37:562
1473313993029,1cyclictest1646480-21kworker/10:0+events23:37:552
1473313993029,1cyclictest1646480-21kworker/10:0+events23:14:272
1473313993029,1cyclictest1646480-21kworker/10:0+events22:58:112
1473313993029,1cyclictest1646480-21kworker/10:0+events22:25:202
1473313993029,1cyclictest1646480-21kworker/10:0+events22:24:432
1473313993029,1cyclictest1646480-21kworker/10:0+events22:15:142
1473313993029,1cyclictest1646480-21kworker/10:0+events00:39:152
1473313993029,1cyclictest1646480-21kworker/10:0+events00:02:362
1473313993029,1cyclictest1625206-21kworker/10:2+events22:04:242
1473313993029,1cyclictest1467038-21kworker/10:1+events20:41:472
1473313993029,1cyclictest1467038-21kworker/10:1+events19:10:002
147331399300,1cyclictest0-21swapper/1020:47:182
1473310993029,1cyclictest1774-21snmpd21:43:3015
1473310993029,1cyclictest1774-21snmpd21:34:1715
1473310993029,1cyclictest0-21swapper/923:02:3715
147331099300,30cyclictest0-21swapper/923:44:5715
147331099300,30cyclictest0-21swapper/919:14:4715
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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