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2026-05-04 - 11:07

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #3

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 rack0slot3s.osadl.org (updated Mon May 04, 2026 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23977632278209,58sleep40-21swapper/419:08:294
23978602271215,18sleep50-21swapper/519:09:515
23977872267218,17sleep10-21swapper/119:08:501
23977382263218,16sleep60-21swapper/619:08:076
23978352260217,33sleep70-21swapper/719:09:297
23955492258213,16sleep00-21swapper/019:05:030
23977192255233,14sleep20-21swapper/219:07:552
23977982254213,32sleep30-21swapper/319:09:003
239817199320,1cyclictest2522540-21latency_hist22:54:595
2398144993029,1cyclictest1610495-21kworker/0:2+events00:15:160
2398174992928,1cyclictest2566233-21kworker/u32:1+xprtiod00:15:156
239817499290,22cyclictest0-21swapper/622:40:196
239816499294,3cyclictest914-21NetworkManager23:12:114
239817499270,25cyclictest0-21swapper/620:25:106
239816499273,23cyclictest523-21systemd-journal20:23:194
2398164992721,5cyclictest1391-21snmpd20:58:424
239814999270,27cyclictest0-21swapper/122:05:371
2398178992622,3cyclictest1391-21snmpd21:30:387
239817199260,22cyclictest0-21swapper/522:12:365
2398164992622,3cyclictest1391-21snmpd21:42:484
2398164992620,5cyclictest1391-21snmpd21:01:174
2398164992620,5cyclictest1391-21snmpd21:01:174
2398164992619,6cyclictest1391-21snmpd23:33:524
2398158992621,3cyclictest0-21swapper/319:32:263
239815899260,22cyclictest0-21swapper/323:21:333
239814999260,24cyclictest0-21swapper/120:07:121
2398178992521,3cyclictest1391-21snmpd21:41:247
2398174992521,3cyclictest1391-21snmpd22:10:376
2398174992521,3cyclictest1391-21snmpd00:39:336
2398174992521,3cyclictest1391-21snmpd00:29:146
2398174992518,5cyclictest0-21swapper/623:46:336
2398171992521,3cyclictest1391-21snmpd20:38:105
2398171992521,3cyclictest1391-21snmpd20:16:285
2398171992518,5cyclictest0-21swapper/523:50:135
239817199250,23cyclictest0-21swapper/520:55:155
2398164992521,3cyclictest1391-21snmpd20:35:524
2398164992521,3cyclictest1391-21snmpd19:55:484
2398164992520,4cyclictest1391-21snmpd21:30:204
2398164992519,5cyclictest1391-21snmpd21:39:424
2398164992519,5cyclictest1391-21snmpd20:13:074
2398164992518,6cyclictest2405634-21cat19:20:154
2398164992517,7cyclictest1391-21snmpd22:03:004
2398158992518,5cyclictest0-21swapper/322:05:003
2398158992518,5cyclictest0-21swapper/321:24:593
2398158992518,5cyclictest0-21swapper/320:52:373
2398158992518,3cyclictest0-21swapper/323:48:193
239815899250,23cyclictest0-21swapper/321:31:113
2398153992518,5cyclictest0-21swapper/200:04:432
2398149992521,3cyclictest1391-21snmpd21:21:261
2398149992518,5cyclictest0-21swapper/121:15:411
239814999250,21cyclictest0-21swapper/120:35:101
2398144992521,3cyclictest2526368-21cat23:00:160
2398144992518,6cyclictest1391-21snmpd19:16:110
2398144992518,5cyclictest0-21swapper/020:32:070
239814499250,21cyclictest0-21swapper/022:37:560
239814499250,21cyclictest0-21swapper/020:28:250
239817899245,3cyclictest0-21swapper/722:39:087
2398178992423,1cyclictest0-21swapper/723:55:167
2398178992422,2cyclictest1391-21snmpd20:00:577
2398178992420,3cyclictest1391-21snmpd22:43:357
2398178992420,3cyclictest1391-21snmpd19:58:367
2398178992417,5cyclictest0-21swapper/721:39:347
239817899240,22cyclictest0-21swapper/721:57:307
239817899240,1cyclictest0-21swapper/723:53:077
2398174992422,1cyclictest1391-21snmpd22:45:296
2398174992420,3cyclictest1391-21snmpd21:02:536
2398174992420,3cyclictest1391-21snmpd21:02:536
2398174992420,3cyclictest1391-21snmpd19:58:546
2398174992420,3cyclictest1391-21snmpd00:03:496
2398174992417,5cyclictest0-21swapper/621:37:536
239817499240,22cyclictest0-21swapper/622:24:196
239817499240,22cyclictest0-21swapper/619:36:456
239817499240,22cyclictest0-21swapper/619:24:206
2398171992421,3cyclictest1391-21snmpd20:07:185
2398171992420,3cyclictest1391-21snmpd00:13:555
239817199241,22cyclictest0-21swapper/500:05:475
239817199240,22cyclictest0-21swapper/523:41:405
239817199240,22cyclictest0-21swapper/500:35:365
2398164992421,3cyclictest1391-21snmpd00:21:244
2398164992420,4cyclictest0-21swapper/420:05:134
2398164992420,3cyclictest1391-21snmpd00:03:284
239816499240,23cyclictest523-21systemd-journal21:16:374
2398158992423,1cyclictest0-21swapper/320:38:583
2398158992421,2cyclictest1391-21snmpd21:13:083
239815899241,22cyclictest0-21swapper/322:04:543
239815899240,2cyclictest2422416-21ntpq19:50:183
239815899240,23cyclictest0-21swapper/322:23:283
239815899240,22cyclictest0-21swapper/322:34:523
239815899240,22cyclictest0-21swapper/322:17:193
239815899240,22cyclictest0-21swapper/319:25:503
2398153992421,3cyclictest1391-21snmpd00:16:082
2398149992420,3cyclictest1391-21snmpd19:15:201
2398149992420,3cyclictest1391-21snmpd00:35:291
2398149992417,5cyclictest0-21swapper/122:13:551
2398149992417,5cyclictest0-21swapper/120:01:061
239814999240,23cyclictest0-21swapper/123:20:091
239814999240,22cyclictest0-21swapper/121:48:061
239814999240,22cyclictest0-21swapper/120:15:131
2398144992421,2cyclictest1610495-21kworker/0:2+events22:01:170
2398144992421,2cyclictest1610495-21kworker/0:2+events21:46:490
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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