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2026-08-13 - 21:56

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 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 Thu Aug 13, 2026 12:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1025699290,28cyclictest0-21swapper/309:30:013
1025699280,27cyclictest0-21swapper/310:00:103
1025699280,23cyclictest0-21swapper/310:31:033
1024899280,27cyclictest1221-21cron09:05:001
10256992720,7cyclictest1218-21awk09:05:003
1024899270,21cyclictest27583-21sh07:45:001
1024899270,0cyclictest3613-21diskmemload10:37:091
1025699260,25cyclictest11113-21ssh11:10:253
1025699260,25cyclictest0-21swapper/309:51:313
1025699260,0cyclictest0-21swapper/311:26:403
1025699260,0cyclictest0-21swapper/310:49:423
10248992622,3cyclictest0-21swapper/111:27:591
1024899260,25cyclictest0-21swapper/110:49:421
1024899260,1cyclictest0-21swapper/111:10:251
1024899260,1cyclictest0-21swapper/109:36:031
10256992522,3cyclictest3613-21diskmemload11:51:053
10256992520,4cyclictest11069-21sh09:44:513
1025699250,24cyclictest22818-21ssh12:19:143
1025699250,24cyclictest10347-21ssh12:35:493
1025699250,21cyclictest3613-21diskmemload11:36:113
1025699250,21cyclictest25854-21ssh12:20:373
1025699250,21cyclictest17484-21ssh12:14:323
1025699250,1cyclictest9095-21ssh12:06:223
1025699250,1cyclictest27891-21sh10:29:273
1025699250,0cyclictest0-21swapper/311:23:403
1025699250,0cyclictest0-21swapper/310:36:233
10248992521,3cyclictest3613-21diskmemload11:03:371
10248992521,3cyclictest3613-21diskmemload11:03:371
1024899250,24cyclictest29977-21cron07:50:001
1024899250,24cyclictest15562-21ssh10:18:271
1024899250,24cyclictest12059-21cron11:40:001
1024899250,24cyclictest0-21swapper/111:47:051
1024899250,24cyclictest0-21swapper/110:14:261
1024899250,21cyclictest0-21swapper/112:12:451
1024899250,1cyclictest11506-21sh09:17:261
1024899250,0cyclictest0-21swapper/110:31:031
1024899250,0cyclictest0-21swapper/110:29:371
1024899250,0cyclictest0-21swapper/109:23:251
10244992523,1cyclictest0-21swapper/010:16:210
10244992522,2cyclictest11747-21ssh09:45:240
1024499250,24cyclictest0-21swapper/012:09:430
1024499250,24cyclictest0-21swapper/010:40:110
1024499250,24cyclictest0-21swapper/009:32:550
10256992423,1cyclictest3613-21diskmemload09:20:063
10256992420,4cyclictest0-21swapper/311:40:313
10256992420,3cyclictest0-21swapper/310:40:343
10256992419,4cyclictest28977-21ssh09:32:473
10256992419,4cyclictest11463-21ssh09:17:233
10256992418,5cyclictest32220-21sh12:26:383
1025699240,24cyclictest3613-21diskmemload11:16:393
1025699240,23cyclictest21939-21gltestperf11:49:383
10252992422,1cyclictest4889-21df11:34:382
10252992422,0cyclictest0-21swapper/211:40:072
10252992419,4cyclictest0-21swapper/211:59:092
1025299240,23cyclictest7737-21ssh09:42:412
1025299240,23cyclictest4950-21sh10:09:142
1025299240,23cyclictest0-21swapper/210:35:502
10248992424,0cyclictest0-21swapper/110:20:261
10248992423,1cyclictest0-21swapper/112:00:161
10248992422,1cyclictest16926-21ssh11:44:451
10248992421,2cyclictest606-21dbus-daemon08:50:011
10248992420,3cyclictest0-21swapper/109:31:131
10248992419,4cyclictest0-21swapper/111:15:451
1024899240,24cyclictest0-21swapper/112:19:331
1024899240,24cyclictest0-21swapper/109:44:501
1024899240,23cyclictest0-21swapper/109:26:011
1024899240,21cyclictest0-21swapper/110:40:341
1024899240,0cyclictest0-21swapper/109:55:551
1024899240,0cyclictest0-21swapper/109:51:241
10244992422,1cyclictest22205-21sh09:26:070
10244992422,1cyclictest0-21swapper/012:34:290
1024499240,24cyclictest0-21swapper/012:17:150
1024499240,24cyclictest0-21swapper/010:13:000
1024499240,24cyclictest0-21swapper/009:18:310
1024499240,23cyclictest0-21swapper/012:14:390
1024499240,23cyclictest0-21swapper/010:09:380
1024499240,23cyclictest0-21swapper/009:52:150
1024499240,0cyclictest0-21swapper/011:32:130
10256992323,0cyclictest20881-21ssh10:50:363
10256992323,0cyclictest0-21swapper/310:15:313
10256992321,1cyclictest29979-21latency_hist07:50:003
10256992320,3cyclictest10712-21ssh10:14:263
10256992320,3cyclictest0-21swapper/312:02:023
10256992320,3cyclictest0-21swapper/310:06:363
1025699230,23cyclictest3613-21diskmemload09:47:003
1025699230,23cyclictest0-21swapper/310:21:553
1025699230,23cyclictest0-21swapper/309:10:113
1025699230,22cyclictest5868-21ssh11:06:013
1025699230,22cyclictest4961-21grep09:39:453
1025699230,22cyclictest31370-21cat10:59:473
1025699230,22cyclictest23425-21ssh09:55:303
1025699230,22cyclictest1851-21apt-get09:09:373
10252992323,0cyclictest3613-21diskmemload12:31:502
10252992323,0cyclictest0-21swapper/212:23:202
10252992323,0cyclictest0-21swapper/211:45:092
10252992323,0cyclictest0-21swapper/210:56:252
10252992321,1cyclictest24982-21rm10:25:242
10252992320,3cyclictest0-21swapper/211:20:092
10252992320,2cyclictest11440-21ssh12:37:242
10252992319,0cyclictest0-21swapper/212:29:142
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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