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2025-12-08 - 15:50

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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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Mon Dec 08, 2025 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
386921190,36sleep23870-21strings08:24:092
192479910546,52cyclictest0-21swapper/007:48:460
192519910042,14cyclictest0-21swapper/107:04:171
1925399953,12cyclictest0-21swapper/311:33:353
1925399933,12cyclictest0-21swapper/309:23:403
19247999233,14cyclictest0-21swapper/010:38:520
243799910,4rtkit-daemon2436-21rtkit-daemon09:24:093
1925399913,8cyclictest9524-21seq10:53:373
1925399863,10cyclictest20382-21crond07:53:443
1925399844,14cyclictest0-21swapper/308:13:543
1925399844,14cyclictest0-21swapper/308:13:543
1925399835,56cyclictest0-21swapper/310:27:163
1925399834,11cyclictest0-21swapper/310:54:113
1925399833,9cyclictest18769-21grep08:54:163
1925399833,9cyclictest18769-21grep08:54:163
1925399833,56cyclictest11015-21cat08:39:073
1925399825,55cyclictest3389-1kworker/3:2H07:44:153
1925399824,69cyclictest0-21swapper/309:14:003
1925399824,12cyclictest0-21swapper/309:53:583
19253998214,45cyclictest32723-21python11:39:103
19253998214,44cyclictest0-21swapper/306:54:043
1925399814,69cyclictest0-21swapper/311:53:583
1925399814,51cyclictest0-21swapper/307:08:583
1925399814,49cyclictest0-21swapper/309:08:503
1925399814,12cyclictest0-21swapper/308:13:433
1925399813,11cyclictest0-21swapper/307:14:133
1925399804,54cyclictest0-21swapper/310:38:503
1925399804,13cyclictest0-21swapper/311:44:033
1925399804,13cyclictest0-21swapper/311:44:033
1925399803,9cyclictest27545-21crond08:08:433
1925399803,8cyclictest7150irq/45-ahci08:29:073
1925399803,13cyclictest0-21swapper/312:04:083
1925399794,68cyclictest0-21swapper/307:58:443
1925399794,54cyclictest0-21swapper/308:46:023
1925399794,51cyclictest0-21swapper/307:19:163
1925399794,12cyclictest0-21swapper/310:13:403
1925399793,10cyclictest30128-21seq10:28:503
19253997916,44cyclictest0-21swapper/310:19:123
19253997916,44cyclictest0-21swapper/310:19:123
19253997914,43cyclictest0-21swapper/307:39:063
1925399785,8cyclictest7150irq/45-ahci12:03:353
1925399785,55cyclictest0-21swapper/308:34:433
1925399784,59cyclictest0-21swapper/310:37:173
1925399784,51cyclictest0-21swapper/308:49:023
1925399784,50cyclictest0-21swapper/311:36:333
1925399784,50cyclictest0-21swapper/308:24:053
1925399784,12cyclictest0-21swapper/310:44:113
1925399784,12cyclictest0-21swapper/306:44:193
1925399774,13cyclictest0-21swapper/309:42:083
1925399774,12cyclictest0-21swapper/307:04:183
1925399773,53cyclictest0-21swapper/309:58:533
1925399773,52cyclictest0-21swapper/307:29:123
1925399764,12cyclictest0-21swapper/311:17:253
1925399764,12cyclictest0-21swapper/311:13:373
1925399764,12cyclictest0-21swapper/306:49:173
1925399763,8cyclictest3810-21runrttasks09:33:433
1925399763,52cyclictest0-21swapper/311:23:493
239202750,3sleep212-21rcu_preempt07:59:022
1925399754,64cyclictest0-21swapper/310:13:513
1925399754,55cyclictest26688-21aten2.4-expect06:58:593
1925399753,9cyclictest18183-21aten_r1power_cu10:03:513
19253997515,43cyclictest23003-21munin-node07:59:133
1925399746,8cyclictest114550irq/46-eth011:02:223
1925399746,8cyclictest114550irq/46-eth011:02:223
1925399744,61cyclictest0-21swapper/311:04:123
1925399744,61cyclictest0-21swapper/307:34:033
1925399744,54cyclictest0-21swapper/309:49:473
1925399743,8cyclictest5793-21taskset11:52:093
1925399743,51cyclictest0-21swapper/309:03:543
19253997413,54cyclictest2009-21fschecks_time09:28:593
1925399734,12cyclictest0-21swapper/308:58:453
19253997312,52cyclictest0-21swapper/308:19:023
1925399724,53cyclictest0-21swapper/309:47:093
1925399713,60cyclictest0-21swapper/311:19:103
1925399704,59cyclictest0-21swapper/307:24:213
1925399692,55cyclictest0-21swapper/312:08:473
243799670,5rtkit-daemon2436-21rtkit-daemon09:54:152
1925399663,12cyclictest0-21swapper/306:43:473
243799640,4rtkit-daemon2436-21rtkit-daemon07:39:202
1925299645,51cyclictest0-21swapper/208:49:032
243799630,4rtkit-daemon2436-21rtkit-daemon11:08:572
243799630,11rtkit-daemon0-21swapper/207:14:292
243799630,11rtkit-daemon0-21swapper/206:49:522
243799630,10rtkit-daemon0-21swapper/209:24:012
302232620,10sleep030224-21strings07:04:110
243799620,7rtkit-daemon0-21swapper/211:34:042
243799620,5rtkit-daemon2436-21rtkit-daemon07:29:062
243799620,4rtkit-daemon2436-21rtkit-daemon08:10:122
243799610,11rtkit-daemon0-21swapper/210:34:592
243799610,10rtkit-daemon0-21swapper/209:34:082
243799610,10rtkit-daemon0-21swapper/207:50:052
1925299615,30cyclictest0-21swapper/209:53:402
19247996146,8cyclictest15454-21munin-run12:13:340
243799600,9rtkit-daemon0-21swapper/210:39:132
1925299604,24cyclictest0-21swapper/210:43:492
19251996045,10cyclictest0-21swapper/110:29:101
129692603,8sleep213047-21grep08:44:022
243799590,11rtkit-daemon0-21swapper/206:44:152
19251995840,12cyclictest0-21swapper/107:09:131
94842572,47sleep00-21swapper/010:53:090
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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