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2026-04-21 - 22:07

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 Tue Apr 21, 2026 12:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3214599280,2cyclictest26064-21munin-run09:40:013
3214599280,27cyclictest26723-21diskmemload09:14:263
3214599280,0cyclictest0-21swapper/309:05:113
32145992722,4cyclictest26723-21diskmemload10:51:283
32145992719,4cyclictest29728-21ssh10:45:413
3214599271,4cyclictest0-21swapper/308:45:103
3214599270,21cyclictest25212-21if_enp1s0.810:10:133
3214599270,0cyclictest0-21swapper/310:42:093
32132992726,1cyclictest62550irq/127-eno112:29:150
32145992620,5cyclictest26723-21diskmemload12:07:133
3214599260,25cyclictest26207-21ssh11:45:343
3214599260,25cyclictest0-21swapper/309:33:143
3214599260,1cyclictest0-21swapper/312:36:443
3214599260,1cyclictest0-21swapper/312:13:303
3214599260,0cyclictest0-21swapper/309:27:383
3213299260,25cyclictest13990-21ssh12:37:010
32145992522,3cyclictest0-21swapper/310:26:393
32145992521,3cyclictest0-21swapper/311:12:033
32145992518,6cyclictest9791-21ssh10:59:273
3214599250,24cyclictest0-21swapper/310:16:183
3214599250,21cyclictest0-21swapper/310:08:483
3214599250,1cyclictest27636-1kworker/u9:112:23:543
3214599250,1cyclictest26723-21diskmemload09:54:333
3214599250,1cyclictest0-21swapper/311:17:453
3214599250,0cyclictest0-21swapper/309:41:003
32140992523,1cyclictest0-21swapper/209:26:292
32140992520,4cyclictest0-21swapper/209:58:232
3214099250,24cyclictest26723-21diskmemload11:58:472
3213699250,1cyclictest6724-21ssh09:51:301
32145992422,2cyclictest0-21swapper/309:45:253
32145992422,1cyclictest9673-21cron07:30:013
32145992421,3cyclictest0-21swapper/311:20:483
32145992421,3cyclictest0-21swapper/310:33:473
32145992421,2cyclictest24320-21cron09:05:013
32145992420,3cyclictest0-21swapper/309:56:113
3214599240,23cyclictest26723-21diskmemload11:50:343
3214599240,20cyclictest0-21swapper/309:24:093
3214599240,1cyclictest0-21swapper/311:09:363
3214599240,0cyclictest0-21swapper/312:16:183
3214599240,0cyclictest0-21swapper/311:58:063
3214599240,0cyclictest0-21swapper/311:43:593
3214599240,0cyclictest0-21swapper/311:31:463
3214599240,0cyclictest0-21swapper/310:03:053
32140992422,1cyclictest27823-21sh12:19:512
3214099242,21cyclictest271rcuc/210:56:302
32140992421,2cyclictest5295-21ssh09:50:172
32140992420,4cyclictest0-21swapper/211:08:402
3214099240,23cyclictest0-21swapper/210:49:092
3214099240,23cyclictest0-21swapper/210:40:152
3214099240,23cyclictest0-21swapper/210:27:152
3214099240,23cyclictest0-21swapper/209:41:272
3214099240,1cyclictest26723-21diskmemload11:12:322
3214099240,0cyclictest0-21swapper/212:36:402
3214099240,0cyclictest0-21swapper/211:02:482
32136992423,1cyclictest26723-21diskmemload11:10:251
32136992423,1cyclictest22-21ksoftirqd/112:37:511
3213699241,2cyclictest22-21ksoftirqd/112:15:181
3213699240,23cyclictest8815-21ssh09:23:051
3213699240,23cyclictest606-21dbus-daemon08:05:011
3213699240,23cyclictest30344-21ssh09:12:341
3213699240,23cyclictest26723-21diskmemload11:05:461
3213699240,23cyclictest0-21swapper/112:12:411
3213699240,23cyclictest0-21swapper/109:59:511
3213699240,22cyclictest313-21systemd-journal10:40:011
3213699240,1cyclictest13408-21ssh11:02:131
3213699240,1cyclictest0-21swapper/111:20:171
3213299240,24cyclictest0-21swapper/011:31:430
3213299240,23cyclictest5205-21ssh09:20:020
3213299240,1cyclictest30011-21sh09:43:060
3213299240,1cyclictest1549-21sh10:19:330
3213299240,0cyclictest26723-21diskmemload09:33:220
3213299240,0cyclictest0-21swapper/011:03:460
32145992323,0cyclictest0-21swapper/310:35:213
32145992320,3cyclictest0-21swapper/312:33:103
32145992320,3cyclictest0-21swapper/311:26:523
3214599230,22cyclictest5094-21perf08:25:003
3214599230,0cyclictest0-21swapper/309:17:023
32140992323,0cyclictest0-21swapper/212:00:522
32140992323,0cyclictest0-21swapper/211:32:502
32140992323,0cyclictest0-21swapper/211:27:172
32140992322,1cyclictest18964-21ssh10:04:542
32140992322,1cyclictest17844-21ssh11:38:302
32140992321,1cyclictest26723-21diskmemload09:30:122
32140992321,1cyclictest12704-21apt-get07:35:022
32140992321,1cyclictest0-21swapper/209:45:112
32140992321,1cyclictest0-21swapper/209:10:122
3214099231,21cyclictest8129-21ssh12:30:432
3214099230,2cyclictest9986-21apt-get09:25:002
3214099230,2cyclictest5734-21sh10:23:032
3214099230,2cyclictest0-21swapper/207:10:112
3214099230,22cyclictest28477-21sh11:16:492
3214099230,22cyclictest2473-21sh09:16:382
3214099230,22cyclictest21203-21ssh11:40:382
3214099230,22cyclictest0-21swapper/210:39:022
3214099230,22cyclictest0-21swapper/210:11:392
3214099230,1cyclictest0-21swapper/212:05:212
3214099230,0cyclictest0-21swapper/212:10:022
3214099230,0cyclictest0-21swapper/211:23:192
32136992323,0cyclictest26723-21diskmemload11:42:391
32136992323,0cyclictest26723-21diskmemload10:01:581
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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