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2025-12-02 - 19:39

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 02, 2025 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
213671211964,51sleep30-21swapper/307:07:253
21384028857,10sleep10-21swapper/107:09:371
21361528053,6sleep00-21swapper/007:06:430
21303727963,9sleep20-21swapper/207:05:242
5657982430,3sleep0221rcuc/011:35:190
213979993124,2cyclictest647035-21turbostat12:30:013
21397999269,8cyclictest606145-21taskset12:00:353
21397999269,8cyclictest606145-21taskset12:00:353
213979992623,1cyclictest0-21swapper/312:00:003
213979992523,1cyclictest0-21swapper/311:36:013
21397999251,9cyclictest393571-21taskset09:40:403
4730492241,17sleep1474739-21cut10:35:181
21397999243,16cyclictest5137802sleep311:00:233
21397999243,16cyclictest5137802sleep311:00:233
213979992422,1cyclictest0-21swapper/310:25:233
213979992422,1cyclictest0-21swapper/307:39:573
21397999239,7cyclictest380055-21taskset09:32:353
213979992321,1cyclictest0-21swapper/312:16:443
213979992320,1cyclictest0-21swapper/310:55:073
213979992320,1cyclictest0-21swapper/307:55:003
21397999231,18cyclictest410457-21taskset09:54:553
213979992220,1cyclictest0-21swapper/311:24:523
213979992219,2cyclictest0-21swapper/310:10:243
213979992219,2cyclictest0-21swapper/310:10:233
213979992219,2cyclictest0-21swapper/309:29:593
213979992219,1cyclictest0-21swapper/310:18:033
213979992218,2cyclictest0-21swapper/309:20:003
213979992218,2cyclictest0-21swapper/309:00:003
213979992213,5cyclictest4488322sleep310:20:063
213979992212,1cyclictest541ktimers/310:35:293
213979992210,1cyclictest0-21swapper/309:05:203
6452922211,8sleep1344350-21diskmemload12:27:231
6368672210,12sleep00-21swapper/012:21:380
21397999213,14cyclictest592061-21chrt11:52:503
21397999212,12cyclictest537015-21taskset11:15:293
21397999212,12cyclictest498547-21taskset10:50:203
213979992118,1cyclictest0-21swapper/309:35:223
213979992118,1cyclictest0-21swapper/309:20:463
213979992118,1cyclictest0-21swapper/308:40:003
213979992117,3cyclictest0-21swapper/312:08:483
213979992117,2cyclictest0-21swapper/312:12:233
213979992117,2cyclictest0-21swapper/310:40:243
213979992116,2cyclictest0-21swapper/312:20:143
21397999211,17cyclictest0-21swapper/311:26:323
21397999209,7cyclictest247979-21taskset07:40:073
21397999205,10cyclictest468737-21chrt10:30:353
213979992018,1cyclictest0-21swapper/308:48:203
213979992018,1cyclictest0-21swapper/308:02:393
213979992017,2cyclictest0-21swapper/309:56:483
213979992016,2cyclictest0-21swapper/311:10:233
213979992016,2cyclictest0-21swapper/310:46:203
213979992016,2cyclictest0-21swapper/309:10:143
213979992015,2cyclictest0-21swapper/310:01:393
4464372191,2sleep10-21swapper/110:16:021
21397999192,12cyclictest561105-21taskset11:32:413
21397999192,11cyclictest660285-21taskset12:35:353
213979991917,1cyclictest0-21swapper/312:31:073
213979991917,1cyclictest0-21swapper/311:49:303
213979991917,1cyclictest0-21swapper/311:06:033
213979991917,1cyclictest0-21swapper/308:40:183
213979991916,2cyclictest0-21swapper/310:05:223
213979991916,2cyclictest0-21swapper/310:05:213
213979991916,1cyclictest0-21swapper/311:40:063
213979991915,2cyclictest0-21swapper/307:30:213
21397999191,14cyclictest0-21swapper/309:00:133
21397999191,12cyclictest400222-21taskset09:45:203
5309882181,11sleep2344350-21diskmemload11:13:282
5021802181,12sleep1502296-21grep10:55:151
213979991816,1cyclictest0-21swapper/307:20:133
213979991816,1cyclictest0-21swapper/307:20:123
213979991815,1cyclictest0-21swapper/307:55:243
213979991814,2cyclictest0-21swapper/308:25:213
213979991814,2cyclictest0-21swapper/308:14:453
21397999180,5cyclictest258896-21turbostat07:50:013
6388822171,11sleep21-21systemd12:25:012
5772482171,4sleep1344350-21diskmemload11:44:141
5463892171,8sleep00-21swapper/011:23:400
5069092171,10sleep00-21swapper/010:55:510
4306312171,4sleep0344350-21diskmemload10:05:280
4306312171,4sleep0344350-21diskmemload10:05:280
4159972171,3sleep20-21swapper/209:55:552
3572492171,10sleep1344350-21diskmemload09:16:141
3569212171,4sleep2344350-21diskmemload09:15:382
21397999172,9cyclictest295821-21taskset08:24:293
21397999172,9cyclictest295821-21taskset08:24:283
21397999172,10cyclictest290539-21taskset08:19:563
213979991715,1cyclictest0-21swapper/308:34:033
213979991714,1cyclictest0-21swapper/308:06:433
213979991714,1cyclictest0-21swapper/307:13:533
21397999171,14cyclictest0-21swapper/307:19:593
21397999171,12cyclictest0-21swapper/308:50:133
5873022161,10sleep0588969-21tr11:50:180
5823622161,10sleep0582413-21ntpq11:45:220
5809632162,8sleep1582173-21memory11:45:191
5465902161,3sleep10-21swapper/111:24:051
5387412161,4sleep2344350-21diskmemload11:18:382
5317862161,3sleep1344350-21diskmemload11:14:551
5174122161,10sleep2517625-21diskstats11:05:152
4084352161,10sleep0344350-21diskmemload09:51:160
3507402161,3sleep10-21swapper/109:13:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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