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2025-12-10 - 01:21

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, 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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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 rack3slot3s.osadl.org (updated Tue Dec 09, 2025 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
381316822380,2sleep20-21swapper/212:25:172
3386406216152,104sleep30-21swapper/307:05:393
338660128554,9sleep10-21swapper/107:08:101
338657028052,6sleep00-21swapper/007:07:450
338653327862,9sleep20-21swapper/207:07:192
3386859994037,1cyclictest0-21swapper/309:45:173
3386859993128,1cyclictest0-21swapper/310:35:233
37512162268,8sleep03752685-21tr11:45:150
3386859992623,1cyclictest0-21swapper/307:35:003
338685999258,13cyclictest3626952-21chrt10:24:163
3386859992421,1cyclictest0-21swapper/311:35:013
3386859992421,1cyclictest0-21swapper/308:10:233
3386859992421,1cyclictest0-21swapper/307:36:233
3386859992420,2cyclictest0-21swapper/312:20:173
3386859992420,2cyclictest0-21swapper/311:23:303
3386859992420,2cyclictest0-21swapper/311:05:013
3386859992420,2cyclictest0-21swapper/308:05:003
3386859992412,8cyclictest3656480-21taskset10:43:243
338685999241,19cyclictest3580703-21taskset09:50:563
3386859992320,1cyclictest0-21swapper/310:10:003
338685999230,19cyclictest35888692chrt09:58:013
338685999222,12cyclictest3832902-21taskset12:37:373
3386859992219,1cyclictest0-21swapper/309:10:193
3386859992216,3cyclictest0-21swapper/310:45:173
338685999221,17cyclictest3709975-21taskset11:16:513
37557442211,2sleep10-21swapper/111:46:571
3386859992118,1cyclictest0-21swapper/307:25:243
3386859992117,2cyclictest0-21swapper/310:25:183
3386859992113,4cyclictest37022262sleep311:11:483
3386859992112,5cyclictest35662092sleep309:41:353
338685999211,15cyclictest3763428-21chrt11:51:393
338685999211,14cyclictest3749112-21taskset11:42:383
338685999211,13cyclictest0-21swapper/312:02:313
37278672201,13sleep23727984-21fschecks_time11:30:152
36144392205,10sleep23616267-21cut10:15:172
36144392205,10sleep23616267-21cut10:15:172
338685999202,13cyclictest3824296-21taskset12:31:153
338685999202,13cyclictest3773118-21taskset11:59:523
3386859992018,1cyclictest0-21swapper/310:35:023
3386859992017,1cyclictest0-21swapper/310:51:503
3386859992015,1cyclictest0-21swapper/308:35:003
338685999201,14cyclictest3726981-21chrt11:29:343
338685999201,13cyclictest3736156-21taskset11:35:153
338685999201,11cyclictest3458420-21taskset08:15:123
338685999192,11cyclictest3469053-21taskset08:25:103
3386859991915,3cyclictest66550irq/131-enp1s0-TxRx-311:06:343
338685999191,14cyclictest3811758-21taskset12:25:143
338685999191,14cyclictest3544072-21chrt09:26:023
338685999191,14cyclictest0-21swapper/312:15:203
338685999191,14cyclictest0-21swapper/309:16:383
338685999191,13cyclictest3604989-21chrt10:10:083
37189992180,2sleep10-21swapper/111:24:361
36046062181,3sleep20-21swapper/210:09:562
35677162181,2sleep10-21swapper/109:44:301
338685999182,11cyclictest3557794-21taskset09:35:203
3386859991815,1cyclictest0-21swapper/309:10:003
338685999181,14cyclictest3679507-21chrt10:57:593
338685999181,14cyclictest0-21swapper/312:10:513
338685999181,14cyclictest0-21swapper/307:10:213
338685999181,13cyclictest3781133-21chrt12:05:103
338685999181,13cyclictest3781133-21chrt12:05:103
338685999181,13cyclictest3612491-21chrt10:15:023
338685999181,13cyclictest3612491-21chrt10:15:013
338685999180,14cyclictest0-21swapper/309:30:083
338685999180,14cyclictest0-21swapper/309:20:293
338685999180,14cyclictest0-21swapper/309:20:293
38331902171,3sleep00-21swapper/012:38:440
36867352171,4sleep13516452-21diskmemload11:01:511
35961542171,10sleep03516452-21diskmemload10:02:530
35230572171,4sleep13516452-21diskmemload09:12:591
338685999172,12cyclictest3431156-21taskset07:46:433
3386859991715,1cyclictest0-21swapper/310:01:443
3386859991714,1cyclictest0-21swapper/307:50:103
3386859991713,2cyclictest0-21swapper/307:15:123
338685999171,13cyclictest0-21swapper/307:20:443
338685999171,12cyclictest3484845-21turbostat08:40:003
338685999171,10cyclictest3506058-21chrt09:00:013
338685999170,14cyclictest0-21swapper/309:00:253
37953462161,3sleep23516452-21diskmemload12:14:162
37639172161,3sleep10-21swapper/111:52:271
37627872161,5sleep23516452-21diskmemload11:50:382
37185562161,4sleep23516452-21diskmemload11:23:492
37104672161,4sleep03516452-21diskmemload11:17:450
37097562161,2sleep10-21swapper/111:16:261
37006902161,10sleep03700748-21ntpq11:10:190
36791062161,2sleep20-21swapper/210:57:192
36716062161,7sleep00-21swapper/010:52:560
36413532161,2sleep00-21swapper/010:33:070
36341102161,2sleep00-21swapper/010:28:580
36035232161,3sleep03516452-21diskmemload10:07:410
35807202166,4sleep1331ktimers/109:51:001
35749252161,4sleep23516452-21diskmemload09:49:072
35521182161,4sleep23516452-21diskmemload09:32:282
35517972161,10sleep13516452-21diskmemload09:31:481
35448472161,10sleep13544859-21ssh09:27:421
35390022161,2sleep00-21swapper/009:25:120
34581352161,9sleep23458184-21munin-run08:15:002
338685999161,9cyclictest3490387-21taskset08:45:103
3386859991613,1cyclictest0-21swapper/307:40:213
338685999161,11cyclictest0-21swapper/311:45:063
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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