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2026-03-06 - 23:41

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 Fri Mar 06, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1745055215141,104sleep30-21swapper/307:06:133
174511328655,10sleep10-21swapper/107:06:551
174463328363,12sleep20-21swapper/207:05:232
174034627951,17sleep00-21swapper/007:05:050
174548199251,14cyclictest0-21swapper/312:35:463
174548199222,15cyclictest1893663-21chrt09:20:103
174548199215,12cyclictest1953346-21taskset09:52:543
174548199211,16cyclictest0-21swapper/308:45:353
1745481992110,7cyclictest1936250-21taskset09:43:283
174548199210,17cyclictest2119689-21taskset11:26:553
174548199202,14cyclictest1817203-21turbostat08:15:003
1745481992014,3cyclictest2077309-21taskset11:03:503
174548199201,16cyclictest66950irq/132-enp1s0-TxRx-312:10:103
174548199201,16cyclictest0-21swapper/312:26:343
174548199201,15cyclictest66950irq/132-enp1s0-TxRx-310:19:213
174548199201,15cyclictest0-21swapper/311:13:013
174548199201,15cyclictest0-21swapper/310:56:283
174548199201,15cyclictest0-21swapper/308:31:363
22365592191,13sleep21875761-21diskmemload12:35:052
174548199199,6cyclictest2122385-21taskset11:30:073
1745481991915,2cyclictest0-21swapper/312:05:163
174548199191,15cyclictest0-21swapper/312:32:573
174548199191,15cyclictest0-21swapper/311:15:113
174548199191,15cyclictest0-21swapper/310:31:513
174548199191,15cyclictest0-21swapper/310:28:513
174548199191,14cyclictest0-21swapper/312:18:213
174548199191,14cyclictest0-21swapper/311:36:233
174548199191,14cyclictest0-21swapper/310:53:013
174548199191,14cyclictest0-21swapper/310:45:583
174548199191,14cyclictest0-21swapper/310:45:573
174548199191,14cyclictest0-21swapper/309:57:153
174548199190,17cyclictest0-21swapper/309:45:503
174548199190,16cyclictest1822500-21chrt08:19:273
21844822181,4sleep11875761-21diskmemload12:05:141
21772712188,5sleep22179020-21cut12:00:172
21188942181,3sleep00-21swapper/011:25:520
21030362181,3sleep10-21swapper/111:18:041
174548199189,5cyclictest0-21swapper/309:10:003
174548199181,6cyclictest0-21swapper/310:40:113
174548199181,5cyclictest66950irq/132-enp1s0-TxRx-309:17:093
1745481991811,4cyclictest1927811-21taskset09:39:193
174548199181,14cyclictest0-21swapper/312:20:033
174548199181,14cyclictest0-21swapper/312:03:393
174548199181,14cyclictest0-21swapper/311:50:103
174548199181,14cyclictest0-21swapper/311:43:303
174548199181,14cyclictest0-21swapper/310:06:433
174548199181,14cyclictest0-21swapper/309:30:513
174548199181,14cyclictest0-21swapper/309:26:033
174548199181,14cyclictest0-21swapper/309:10:173
174548199181,13cyclictest2003387-21chrt10:20:203
174548199181,13cyclictest0-21swapper/307:20:113
174548199180,15cyclictest0-21swapper/311:59:583
174548199180,15cyclictest0-21swapper/311:05:103
174548199180,15cyclictest0-21swapper/310:37:553
174548199180,14cyclictest0-21swapper/310:10:073
174548199180,14cyclictest0-21swapper/307:50:113
20951932171,3sleep20-21swapper/211:14:152
20402512171,3sleep20-21swapper/210:41:572
19360582171,3sleep00-21swapper/009:43:140
1745481991714,1cyclictest0-21swapper/311:20:143
1745481991712,3cyclictest0-21swapper/311:49:033
174548199171,13cyclictest0-21swapper/308:35:123
174548199170,14cyclictest0-21swapper/310:00:273
174548199170,14cyclictest0-21swapper/307:35:033
22094192161,4sleep21875761-21diskmemload12:19:142
21732782161,2sleep00-21swapper/011:57:510
21224132161,4sleep12122432-21apt-get11:30:101
21208862161,2sleep10-21swapper/111:28:301
21007042161,4sleep02100788-21find11:15:260
20949352161,4sleep11875761-21diskmemload11:13:541
20865622161,2sleep00-21swapper/011:09:290
20777462161,4sleep11875761-21diskmemload11:04:241
20660992161,9sleep00-21swapper/010:55:380
19810602161,4sleep21875761-21diskmemload10:09:502
19263312161,3sleep00-21swapper/009:37:240
19242732161,4sleep21875761-21diskmemload09:35:212
17571222161,9sleep01757179-21ntpq07:15:200
174548199161,12cyclictest0-21swapper/307:25:173
174548199160,13cyclictest0-21swapper/308:52:033
174548199160,13cyclictest0-21swapper/308:40:193
174548199160,13cyclictest0-21swapper/307:49:093
174548199160,13cyclictest0-21swapper/307:10:203
22359802150,2sleep00-21swapper/012:34:400
21826402151,9sleep00-21swapper/012:03:360
21266052151,3sleep22126648-21ntpq11:30:202
20685702150,9sleep21875761-21diskmemload10:58:532
20331962150,2sleep00-21swapper/010:39:100
20167462151,7sleep12017011-21df10:30:131
19997502151,10sleep22000957-21cut10:20:162
19259422151,7sleep11925953-21sh09:36:531
19168162151,2sleep20-21swapper/209:31:262
18841782150,1sleep20-21swapper/209:14:372
18813222151,2sleep00-21swapper/009:10:500
1745481991513,1cyclictest0-21swapper/307:55:053
174548199151,2cyclictest0-21swapper/308:25:183
1745481991510,2cyclictest0-21swapper/307:40:103
174548199150,2cyclictest0-21swapper/307:15:013
174548199150,13cyclictest0-21swapper/308:20:203
174548199150,12cyclictest0-21swapper/309:00:203
174548199150,12cyclictest0-21swapper/308:55:103
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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