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2026-04-11 - 14:09

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot6s.osadl.org (updated Sat Apr 11, 2026 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27322211895,18sleep00-21swapper/007:08:070
27343211696,15sleep10-21swapper/107:08:241
27411211194,12sleep20-21swapper/207:09:172
27350210888,15sleep30-21swapper/307:08:303
277722720,0sleep10-21swapper/107:10:111
216612280,1sleep10-21swapper/110:26:191
2749799200,18cyclictest0-21swapper/309:20:123
2749599171,3cyclictest0-21swapper/110:58:331
27497991611,3cyclictest16156-21ssh12:35:363
27496991611,3cyclictest773-21iostat_ios10:05:152
27495991611,3cyclictest5688-21diskstats12:25:131
2749599161,13cyclictest17767-21cron09:50:001
27495991611,3cyclictest11662-21df10:50:141
2749599161,13cyclictest0-21swapper/110:30:131
2749499161,3cyclictest27437-21ssh09:25:250
27494991613,2cyclictest4779-21kworker/u8:109:37:040
2749499161,13cyclictest17385-21apt-get11:30:130
325152150,2sleep00-21swapper/011:11:080
298282151,3sleep029932-21munin-node0
27497991511,2cyclictest19814-21ssh10:58:463
2749799150,14cyclictest0-21swapper/310:39:073
2749799150,13cyclictest0-21swapper/308:10:163
27496991512,2cyclictest21014-21kworker/u8:211:04:042
27496991512,2cyclictest11561-21diskmemload09:43:242
2749699150,13cyclictest29720-21latency_hist08:35:002
2749699150,13cyclictest0-21swapper/210:00:142
2749599151,3cyclictest3728-21runrttasks11:12:431
2749599151,2cyclictest0-21swapper/111:35:121
27495991511,2cyclictest25721-21apt-get11:05:121
27495991510,3cyclictest11660-21dpkg07:50:141
2749599150,13cyclictest11561-21diskmemload12:11:031
2749599150,13cyclictest0-21swapper/109:14:131
2749599150,13cyclictest0-21swapper/109:14:131
2749499151,3cyclictest3787-21ssh11:49:530
27494991512,2cyclictest8904-21kworker/u8:010:24:050
2749499151,12cyclictest27811-21sed11:40:160
2749499151,12cyclictest0-21swapper/009:13:210
2749499151,12cyclictest0-21swapper/009:13:210
2749499150,13cyclictest17755-21smartctl10:56:010
2749499150,13cyclictest13175-21cut11:25:140
2749499150,13cyclictest0-21swapper/012:29:100
2749499150,13cyclictest0-21swapper/010:03:070
7142149,2sleep10-21swapper/108:41:041
27497991411,2cyclictest5331-21apt-get07:35:073
27497991411,2cyclictest0-21swapper/311:09:063
27497991411,2cyclictest0-21swapper/310:30:163
27497991411,2cyclictest0-21swapper/309:42:363
27497991411,2cyclictest0-21swapper/309:16:463
27497991411,2cyclictest0-21swapper/307:20:163
27497991410,2cyclictest21070-21hostname11:00:153
2749799140,2cyclictest0-21swapper/310:49:063
2749799140,13cyclictest0-21swapper/311:45:063
2749799140,13cyclictest0-21swapper/309:30:163
2749799140,12cyclictest0-21swapper/310:22:163
27496991411,2cyclictest11561-21diskmemload10:47:242
27496991411,2cyclictest0-21swapper/212:04:242
27496991411,2cyclictest0-21swapper/209:52:342
2749699140,3cyclictest15637-21grep12:35:172
2749699140,2cyclictest0-21swapper/208:10:122
2749699140,13cyclictest0-21swapper/211:52:342
2749699140,13cyclictest0-21swapper/211:23:042
2749699140,13cyclictest0-21swapper/210:24:042
2749699140,13cyclictest0-21swapper/209:34:142
2749699140,13cyclictest0-21swapper/209:15:042
2749699140,12cyclictest0-21swapper/207:35:122
2749599141,9cyclictest11561-21diskmemload09:58:011
2749599141,3cyclictest0-21swapper/107:20:501
27495991411,2cyclictest23936-21ssh11:02:431
27495991411,2cyclictest0-21swapper/111:32:431
27495991411,2cyclictest0-21swapper/109:32:031
27495991411,2cyclictest0-21swapper/109:05:131
27495991411,2cyclictest0-21swapper/108:30:131
2749599140,2cyclictest0-21swapper/112:34:531
2749599140,2cyclictest0-21swapper/111:26:331
2749599140,13cyclictest0-21swapper/112:36:531
2749599140,13cyclictest0-21swapper/111:55:101
2749599140,12cyclictest0-21swapper/112:20:441
2749599140,12cyclictest0-21swapper/110:35:501
2749599140,12cyclictest0-21swapper/110:11:031
27494991411,2cyclictest3728-21runrttasks11:01:590
27494991411,2cyclictest26336-21kworker/u8:110:06:040
27494991411,2cyclictest25137-21kworker/u8:012:15:040
27494991411,2cyclictest0-21swapper/011:39:370
27494991411,2cyclictest0-21swapper/011:15:170
27494991411,2cyclictest0-21swapper/010:48:570
27494991411,2cyclictest0-21swapper/010:12:570
27494991411,2cyclictest0-21swapper/009:31:410
27494991411,2cyclictest0-21swapper/009:20:170
2749499140,2cyclictest0-21swapper/009:56:270
2749499140,2cyclictest0-21swapper/009:45:370
2749499140,2cyclictest0-21swapper/009:18:270
2749499140,13cyclictest0-21swapper/009:52:470
2749499140,12cyclictest30048-21ssh11:09:470
2749499140,12cyclictest27286-21ssh12:14:290
2749499140,12cyclictest0-21swapper/011:55:500
2749499140,12cyclictest0-21swapper/010:54:290
2749499140,12cyclictest0-21swapper/007:20:180
176232140,2sleep20-21swapper/209:49:492
74632130,3sleep37475-21ssh09:38:593
27497991310,2cyclictest0-21swapper/312:20:463
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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