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2026-08-27 - 18:08

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Thu Aug 27, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
261679910338,13cyclictest0-21swapper/209:52:412
261679910338,13cyclictest0-21swapper/209:52:412
2613521020,4sleep226-21rcuc/207:55:042
2613521020,4sleep226-21rcuc/207:55:042
26167991004,56cyclictest1227-21runrttasks10:26:202
2616399783,56cyclictest29679-21latency_hist06:59:530
26167997443,13cyclictest0-21swapper/210:35:032
2616399743,65cyclictest0-21swapper/008:14:160
2616399734,9cyclictest20142-21grep10:10:190
2616399734,62cyclictest0-21swapper/007:45:260
2616899723,61cyclictest0-21swapper/309:00:193
2616399723,63cyclictest0-21swapper/010:39:510
26168997115,48cyclictest24239-21grep07:50:253
26168997115,48cyclictest24239-21grep07:50:253
2616899695,57cyclictest0-21swapper/306:30:053
2616899695,57cyclictest0-21swapper/306:30:053
2616899695,55cyclictest1124-21snmpd10:34:433
2616899695,55cyclictest1124-21snmpd10:34:433
2616799693,49cyclictest30920-21latency_hist05:54:562
2616799693,49cyclictest30920-21latency_hist05:54:562
69422686,12sleep10-21swapper/107:19:531
69422686,12sleep10-21swapper/107:19:531
53262683,10sleep00-21swapper/010:38:590
2616899687,53cyclictest3468-21timerandwakeup09:45:183
2616899684,57cyclictest0-21swapper/311:10:033
2616899684,57cyclictest0-21swapper/311:10:033
2616799683,58cyclictest0-21swapper/208:45:182
2616899677,53cyclictest0-21swapper/309:26:133
2616899675,54cyclictest10497-21processes10:45:113
2616899674,56cyclictest0-21swapper/310:12:243
2616899674,55cyclictest18671-21munin-plugin-st10:59:433
2616899667,53cyclictest0-21swapper/308:38:513
2616899667,53cyclictest0-21swapper/308:38:513
2616899665,53cyclictest0-21swapper/307:59:513
2616899665,53cyclictest0-21swapper/307:59:513
2616899664,54cyclictest23534-21awk11:05:103
2616899664,54cyclictest0-21swapper/310:50:163
2616899664,54cyclictest0-21swapper/308:26:503
26167996640,13cyclictest0-21swapper/209:34:322
26167996640,12cyclictest0-21swapper/206:50:142
2616799664,55cyclictest0-21swapper/210:39:542
2616799664,55cyclictest0-21swapper/206:45:122
2616699663,43cyclictest17610-21cat09:19:481
2616699663,43cyclictest17610-21cat09:19:481
2616399668,51cyclictest0-21swapper/009:21:260
2616399666,53cyclictest0-21swapper/007:15:160
2616399666,53cyclictest0-21swapper/007:15:160
2616899656,52cyclictest0-21swapper/308:01:063
2616899655,54cyclictest18893-21diskmemload09:53:083
2616899655,54cyclictest18893-21diskmemload09:53:083
2616899654,54cyclictest10803-21munin-node06:20:233
2616899654,54cyclictest0-21swapper/310:41:153
2616899654,54cyclictest0-21swapper/310:38:113
2616899654,54cyclictest0-21swapper/309:17:493
2616899654,54cyclictest0-21swapper/309:17:493
2616899654,54cyclictest0-21swapper/309:07:313
2616899654,54cyclictest0-21swapper/308:42:303
2616899654,54cyclictest0-21swapper/307:44:513
2616799654,54cyclictest0-21swapper/209:57:302
2616799654,54cyclictest0-21swapper/208:33:302
2616799654,54cyclictest0-21swapper/208:20:152
2616799654,54cyclictest0-21swapper/208:16:142
2616799653,56cyclictest0-21swapper/210:32:002
2616799653,56cyclictest0-21swapper/210:32:002
2616799653,56cyclictest0-21swapper/209:06:392
2616799653,55cyclictest0-21swapper/208:26:572
26167996515,43cyclictest0-21swapper/209:25:222
26166996547,11cyclictest0-21swapper/105:55:281
26166996540,9cyclictest10613-21aten_r1power_po08:20:031
26166996535,13cyclictest0-21swapper/107:55:091
26166996535,13cyclictest0-21swapper/107:55:091
2616699653,56cyclictest0-21swapper/105:45:061
2616699653,54cyclictest0-21swapper/110:24:591
2616399655,52cyclictest0-21swapper/006:15:160
2616399654,53cyclictest0-21swapper/010:00:020
2616399654,16cyclictest0-21swapper/009:15:070
2616399654,16cyclictest0-21swapper/009:15:070
2616899649,48cyclictest21400-21kernelversion06:40:163
2616899645,52cyclictest3241-21ssh08:55:453
2616899645,52cyclictest0-21swapper/309:32:533
2616899644,53cyclictest16606-21sort10:05:173
2616899643,54cyclictest14173-21kworker/3:109:21:133
2616899643,12cyclictest0-21swapper/306:19:243
2616799645,51cyclictest0-21swapper/210:45:022
2616799645,51cyclictest0-21swapper/209:20:062
2616799644,53cyclictest0-21swapper/210:19:492
2616799644,53cyclictest0-21swapper/208:04:262
26167996437,13cyclictest0-21swapper/207:20:122
2616799643,54cyclictest0-21swapper/210:51:052
2616799643,54cyclictest0-21swapper/208:50:152
2616799643,53cyclictest0-21swapper/209:35:042
2616699644,53cyclictest0-21swapper/110:09:231
2616699644,53cyclictest0-21swapper/108:40:111
2616699643,54cyclictest0-21swapper/106:15:051
2616899634,53cyclictest18893-21diskmemload08:09:483
2616899634,52cyclictest4672-21iostat_ios06:05:163
2616899634,51cyclictest1124-21snmpd10:59:473
2616899633,53cyclictest9569-21munin-node07:25:223
2616899633,53cyclictest30687-21df08:50:033
2616899633,53cyclictest14682-21ssh10:04:263
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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