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2026-05-19 - 06:40

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 Tue May 19, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26833822271233,28sleep20-21swapper/219:09:022
26833352268243,15sleep40-21swapper/419:08:334
26831612260213,16sleep00-21swapper/019:06:350
26830832258216,34sleep30-21swapper/319:05:343
26832492256214,32sleep50-21swapper/519:07:455
26830862255214,32sleep60-21swapper/619:05:376
26834142249223,17sleep10-21swapper/119:09:261
26832752247226,13sleep70-21swapper/719:08:037
268378499320,10cyclictest0-21swapper/722:50:587
2683771993130,1cyclictest2434313-21kworker/4:0+events19:35:324
2683780993029,1cyclictest2653350-21kworker/6:0+mm_percpu_wq23:40:186
2683780993029,1cyclictest2653350-21kworker/6:0+mm_percpu_wq23:40:186
2683775993029,1cyclictest0-21swapper/523:40:185
2683775993029,1cyclictest0-21swapper/523:40:185
268378099260,22cyclictest0-21swapper/622:37:176
268378099260,22cyclictest0-21swapper/621:28:186
268378099260,22cyclictest0-21swapper/600:21:536
268377599260,22cyclictest0-21swapper/523:45:105
268377599260,22cyclictest0-21swapper/523:45:105
268377599260,22cyclictest0-21swapper/521:01:295
2683771992620,6cyclictest1391-21snmpd22:01:224
2683766992619,3cyclictest0-21swapper/319:30:163
268376699260,24cyclictest0-21swapper/321:50:143
268376699260,22cyclictest0-21swapper/322:27:013
2683762992621,4cyclictest1391-21snmpd00:21:382
268375799260,24cyclictest0-21swapper/123:46:401
268375799260,24cyclictest0-21swapper/123:46:401
268375799260,22cyclictest0-21swapper/122:42:391
268375399260,24cyclictest0-21swapper/020:23:080
268375399260,24cyclictest0-21swapper/019:53:000
2683784992522,2cyclictest1391-21snmpd20:43:507
2683784992521,3cyclictest1391-21snmpd21:31:217
2683784992518,5cyclictest0-21swapper/700:34:067
268378499250,23cyclictest0-21swapper/722:05:197
268378499250,21cyclictest0-21swapper/723:40:327
268378499250,21cyclictest0-21swapper/723:40:317
2683780992518,5cyclictest0-21swapper/619:55:306
2683780992518,5cyclictest0-21swapper/619:29:176
2683775992522,3cyclictest1391-21snmpd23:22:425
2683775992518,5cyclictest0-21swapper/521:58:255
2683775992518,5cyclictest0-21swapper/500:27:115
2683771992521,3cyclictest1391-21snmpd23:50:554
2683771992518,3cyclictest0-21swapper/422:35:354
2683771992518,3cyclictest0-21swapper/420:28:524
268377199250,25cyclictest0-21swapper/419:42:124
2683766992522,2cyclictest1391-21snmpd00:31:383
2683766992521,3cyclictest1391-21snmpd20:25:013
2683766992518,5cyclictest0-21swapper/322:40:143
2683766992518,5cyclictest0-21swapper/321:14:213
2683766992518,5cyclictest0-21swapper/321:14:213
2683766992518,3cyclictest0-21swapper/323:17:333
268376699250,1cyclictest0-21swapper/321:17:273
268376699250,1cyclictest0-21swapper/321:17:273
2683762992522,2cyclictest2703545-21latency_hist19:45:002
2683762992521,3cyclictest1391-21snmpd22:55:292
2683762992521,3cyclictest1391-21snmpd21:28:122
2683762992521,3cyclictest1391-21snmpd20:47:412
268376299250,1cyclictest0-21swapper/223:37:582
2683757992521,3cyclictest1391-21snmpd23:25:421
2683757992518,5cyclictest0-21swapper/122:21:491
268375799250,1cyclictest0-21swapper/123:02:181
2683753992518,5cyclictest0-21swapper/000:05:160
268375399250,23cyclictest0-21swapper/021:22:040
268375399250,23cyclictest0-21swapper/021:06:520
268375399250,23cyclictest0-21swapper/021:03:400
268375399250,23cyclictest0-21swapper/019:14:560
268378499240,22cyclictest0-21swapper/721:16:307
268378499240,22cyclictest0-21swapper/721:16:307
268378499240,22cyclictest0-21swapper/720:19:547
2683780992417,5cyclictest0-21swapper/622:26:286
268378099240,24cyclictest0-21swapper/600:03:316
268378099240,22cyclictest0-21swapper/619:12:116
2683775992421,3cyclictest1391-21snmpd23:02:215
2683775992420,3cyclictest2861342-21awk00:30:145
2683775992418,2cyclictest0-21swapper/522:43:385
2683771992420,3cyclictest1391-21snmpd23:38:404
2683771992420,3cyclictest1391-21snmpd21:24:184
268377199240,22cyclictest0-21swapper/423:26:064
2683766992418,4cyclictest0-21swapper/320:34:373
2683766992418,2cyclictest0-21swapper/323:35:153
268376699240,22cyclictest0-21swapper/300:15:163
268376299240,14cyclictest0-21swapper/219:10:592
2683757992420,3cyclictest1391-21snmpd19:19:261
2683757992420,3cyclictest1391-21snmpd00:26:351
268375799240,23cyclictest0-21swapper/120:44:261
268375799240,22cyclictest0-21swapper/123:32:481
2683753992423,1cyclictest0-21swapper/019:30:590
2683753992422,2cyclictest1391-21snmpd23:06:240
268375399241,22cyclictest0-21swapper/020:50:110
268375399240,3cyclictest523-21systemd-journal20:26:120
268375399240,24cyclictest0-21swapper/019:29:520
268375399240,22cyclictest0-21swapper/023:59:480
268375399240,22cyclictest0-21swapper/023:53:360
268375399240,22cyclictest0-21swapper/023:28:400
268375399240,22cyclictest0-21swapper/022:17:280
268375399240,22cyclictest0-21swapper/022:04:040
268375399240,22cyclictest0-21swapper/021:26:120
268375399240,22cyclictest0-21swapper/020:13:360
268375399240,22cyclictest0-21swapper/020:07:200
268375399240,22cyclictest0-21swapper/019:56:480
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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