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2026-04-23 - 01:06

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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 rackeslot5s.osadl.org (updated Wed Apr 22, 2026 12:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2827799260,25cyclictest0-21swapper/109:29:291
2828599250,24cyclictest22021-21diskmemload12:38:163
2828599250,24cyclictest22021-21diskmemload10:09:483
2828599250,24cyclictest0-21swapper/312:21:483
28280992520,4cyclictest0-21swapper/211:20:032
2827799250,24cyclictest8940-21sh12:36:101
2827799250,24cyclictest22021-21diskmemload11:25:021
2827799250,24cyclictest0-21swapper/110:59:351
2827599250,1cyclictest15071-21diskmemload11:08:400
28285992422,1cyclictest0-21swapper/310:13:083
28285992421,2cyclictest24967-21sh10:45:503
2828599240,3cyclictest30467-21awk09:50:003
2828599240,23cyclictest22021-21diskmemload09:50:363
2828599240,0cyclictest22021-21diskmemload09:38:423
2828599240,0cyclictest0-21swapper/311:56:593
2828099240,24cyclictest0-21swapper/211:11:532
2828099240,23cyclictest22021-21diskmemload09:19:302
2828099240,23cyclictest0-21swapper/211:45:222
2828099240,23cyclictest0-21swapper/211:35:262
28277992423,0cyclictest22-21ksoftirqd/109:55:301
2827799240,3cyclictest23166-21dpkg12:20:011
2827799240,23cyclictest6341-21ssh12:02:481
2827799240,23cyclictest26579-21ssh10:16:081
2827799240,23cyclictest22021-21diskmemload12:11:391
2827799240,23cyclictest22021-21diskmemload10:46:241
2827799240,23cyclictest22021-21diskmemload09:53:021
2827799240,23cyclictest18989-21ssh10:40:221
2827799240,23cyclictest0-21swapper/109:23:031
2827599242,21cyclictest1255-21sh11:25:400
28275992422,1cyclictest0-21swapper/011:43:100
2827599240,23cyclictest8444-21apt-key10:00:010
2827599240,23cyclictest2625-21sh09:21:200
28285992323,0cyclictest0-21swapper/311:10:393
28285992323,0cyclictest0-21swapper/309:44:023
28285992322,1cyclictest22021-21diskmemload12:06:323
28285992321,1cyclictest9875-21sh10:31:093
28285992321,1cyclictest0-21swapper/312:16:583
28285992321,1cyclictest0-21swapper/311:05:153
28285992321,1cyclictest0-21swapper/310:52:103
28285992320,2cyclictest29586-21sh08:20:003
28285992320,2cyclictest24799-21apt08:10:003
2828599230,23cyclictest22021-21diskmemload09:59:583
2828599230,23cyclictest0-21swapper/310:01:053
2828599230,23cyclictest0-21swapper/309:30:473
2828599230,23cyclictest0-21swapper/309:26:263
2828599230,23cyclictest0-21swapper/309:21:053
2828599230,22cyclictest4581-21ssh10:26:233
2828599230,22cyclictest31259-21cron11:25:003
2828599230,22cyclictest24805-21ssh11:17:503
2828599230,0cyclictest0-21swapper/311:32:383
2828599230,0cyclictest0-21swapper/310:42:183
2828599230,0cyclictest0-21swapper/310:37:453
28280992323,0cyclictest0-21swapper/210:27:282
28280992323,0cyclictest0-21swapper/209:57:502
28280992322,1cyclictest22021-21diskmemload11:06:452
28280992322,1cyclictest0-21swapper/212:15:402
28280992322,1cyclictest0-21swapper/212:10:252
28280992321,1cyclictest18677-21ssh09:37:312
28280992321,1cyclictest0-21swapper/211:59:272
28280992321,1cyclictest0-21swapper/210:02:202
28280992320,2cyclictest27758-21ssh11:51:362
28280992320,2cyclictest25695-21ptp4l10:15:232
28280992319,3cyclictest313-21systemd-journal09:00:002
2828099230,23cyclictest22021-21diskmemload11:02:102
2828099230,23cyclictest0-21swapper/210:35:482
2828099230,23cyclictest0-21swapper/209:25:262
2828099230,22cyclictest30775-21ssh12:25:362
2828099230,22cyclictest22021-21diskmemload10:10:572
2828099230,22cyclictest1791-21ssh11:26:352
2828099230,22cyclictest0-21swapper/210:55:182
2828099230,0cyclictest0-21swapper/211:30:482
2828099230,0cyclictest0-21swapper/210:51:242
2828099230,0cyclictest0-21swapper/209:49:332
28277992323,0cyclictest22021-21diskmemload09:48:471
28277992323,0cyclictest0-21swapper/112:23:391
28277992323,0cyclictest0-21swapper/111:52:321
28277992323,0cyclictest0-21swapper/110:25:331
28277992323,0cyclictest0-21swapper/109:10:181
28277992322,0cyclictest22-21ksoftirqd/111:05:011
28277992322,0cyclictest0-21swapper/109:15:151
28277992321,1cyclictest0-21swapper/110:13:581
28277992320,0cyclictest151rcu_preempt11:40:371
2827799230,22cyclictest8870-21sh10:00:021
2827799230,22cyclictest20585-21fschecks_count11:45:181
2827799230,22cyclictest19448-21sh09:38:481
2827799230,22cyclictest1751-21ssh12:30:151
2827799230,22cyclictest10622-21ssh12:06:321
2827799230,22cyclictest0-21swapper/111:11:471
2827799230,21cyclictest22021-21diskmemload11:22:271
2827799230,0cyclictest151rcu_preempt11:34:201
2827799230,0cyclictest151rcu_preempt10:06:261
2827799230,0cyclictest0-21swapper/110:50:331
28275992323,0cyclictest9602-21apt-get08:45:020
28275992323,0cyclictest0-21swapper/012:34:120
28275992323,0cyclictest0-21swapper/012:26:410
28275992323,0cyclictest0-21swapper/010:38:180
28275992323,0cyclictest0-21swapper/009:34:550
28275992322,1cyclictest0-21swapper/011:18:230
28275992321,1cyclictest17203-21sh10:07:260
28275992321,1cyclictest0-21swapper/010:13:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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