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2026-07-29 - 16:24

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 Wed Jul 29, 2026 12:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1012499270,1cyclictest0-21swapper/112:33:271
10123992723,4cyclictest4235-21diskmemload09:56:030
1012399270,0cyclictest0-21swapper/009:37:350
10124992620,5cyclictest0-21swapper/109:53:261
10123992621,5cyclictest5523-21ssh11:35:030
1012399260,25cyclictest4235-21diskmemload11:13:070
1012399260,25cyclictest30570-21ssh10:30:390
10126992523,1cyclictest18273-21rm09:51:383
1012699250,1cyclictest4235-21diskmemload09:57:203
10125992523,2cyclictest1778-21sh12:29:532
10125992523,1cyclictest0-21swapper/210:43:282
10124992520,4cyclictest4235-21diskmemload10:05:451
1012499250,24cyclictest0-21swapper/111:44:071
1012499250,24cyclictest0-21swapper/110:50:181
1012499250,21cyclictest4235-21diskmemload10:16:181
1012499250,21cyclictest0-21swapper/109:10:111
1012499250,0cyclictest0-21swapper/109:27:171
10123992521,4cyclictest0-21swapper/010:45:430
10123992520,4cyclictest26855-21ssh10:56:390
1012399250,24cyclictest0-21swapper/012:02:490
1012399250,24cyclictest0-21swapper/011:44:070
1012399250,21cyclictest7572-21ssh12:06:220
1012399250,21cyclictest28998-21ssh11:56:350
1012399250,21cyclictest26865-21ssh11:53:530
1012399250,0cyclictest0-21swapper/010:29:570
10126992422,2cyclictest7034-21sh11:37:163
1012699240,23cyclictest13006-21cpuspeed_turbos09:18:233
1012699240,23cyclictest0-21swapper/309:40:473
1012699240,23cyclictest0-21swapper/309:30:423
1012699240,0cyclictest4235-21diskmemload10:52:493
10125992424,0cyclictest0-21swapper/210:27:462
1012599240,23cyclictest4235-21diskmemload11:25:072
1012599240,23cyclictest4235-21diskmemload09:24:402
1012599240,23cyclictest15654-21grep12:13:302
1012599240,23cyclictest12918-21grep11:13:262
1012599240,23cyclictest0-21swapper/210:30:572
1012599240,23cyclictest0-21swapper/210:06:282
1012599240,1cyclictest4235-21diskmemload11:05:242
10124992423,1cyclictest0-21swapper/111:20:561
10124992421,3cyclictest0-21swapper/111:31:381
10124992421,2cyclictest0-21swapper/111:16:041
10124992421,2cyclictest0-21swapper/110:44:001
1012499240,24cyclictest0-21swapper/112:07:351
1012499240,24cyclictest0-21swapper/111:25:341
1012499240,23cyclictest20570-21expr12:18:261
1012499240,23cyclictest0-21swapper/111:56:351
1012499240,23cyclictest0-21swapper/110:58:011
1012499240,23cyclictest0-21swapper/109:48:271
1012499240,23cyclictest0-21swapper/109:20:371
1012499240,20cyclictest29582-21apt-get09:33:241
1012499240,20cyclictest0-21swapper/111:11:551
1012499240,0cyclictest0-21swapper/112:28:481
1012499240,0cyclictest0-21swapper/112:11:411
1012499240,0cyclictest0-21swapper/111:36:351
1012499240,0cyclictest0-21swapper/111:07:021
10123992423,1cyclictest62550irq/127-eno112:25:450
10123992422,2cyclictest0-21swapper/010:05:140
10123992422,2cyclictest0-21swapper/009:54:430
10123992422,2cyclictest0-21swapper/009:45:220
10123992422,2cyclictest0-21swapper/009:16:340
10123992421,3cyclictest4235-21diskmemload10:13:020
10123992421,2cyclictest0-21swapper/009:24:110
1012399240,24cyclictest0-21swapper/011:30:240
1012399240,23cyclictest0-21swapper/012:30:130
1012399240,23cyclictest0-21swapper/009:30:100
1012399240,21cyclictest21170-21ssh11:48:480
1012399240,21cyclictest0-21swapper/007:30:020
1012399240,1cyclictest4656-21kworker/u8:209:10:150
1012399240,0cyclictest4235-21diskmemload10:50:570
1012399240,0cyclictest0-21swapper/010:44:000
1012399240,0cyclictest0-21swapper/010:36:270
10126992323,0cyclictest30608-21kworker/u8:212:36:573
10126992323,0cyclictest0-21swapper/312:20:073
10126992323,0cyclictest0-21swapper/310:13:243
10126992323,0cyclictest0-21swapper/309:13:353
10126992322,1cyclictest4235-21diskmemload11:20:393
1012699230,2cyclictest30868-21sh10:59:473
1012699230,2cyclictest26516-21ssh10:28:183
1012699230,23cyclictest0-21swapper/312:01:463
1012699230,23cyclictest0-21swapper/310:22:313
1012699230,22cyclictest4235-21diskmemload12:11:363
1012699230,22cyclictest4235-21diskmemload11:51:083
1012699230,22cyclictest4235-21diskmemload11:28:243
1012699230,22cyclictest28278-21ssh10:00:063
1012699230,22cyclictest28042-21sh11:55:153
1012699230,22cyclictest25184-21apt-get08:48:233
1012699230,22cyclictest17016-21ssh10:18:333
1012699230,22cyclictest15927-21sh09:48:383
1012699230,22cyclictest11791-21sh11:11:553
1012699230,22cyclictest0-21swapper/310:06:483
1012699230,0cyclictest4235-21diskmemload12:08:553
1012699230,0cyclictest0-21swapper/311:46:303
1012699230,0cyclictest0-21swapper/311:32:543
1012699230,0cyclictest0-21swapper/309:23:043
10125992323,0cyclictest4235-21diskmemload10:22:132
10125992323,0cyclictest0-21swapper/211:46:232
10125992323,0cyclictest0-21swapper/211:38:252
10125992322,1cyclictest4235-21diskmemload10:11:002
10125992321,1cyclictest16444-21latency_hist11:45:012
10125992321,1cyclictest0-21swapper/210:53:272
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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