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2026-05-16 - 20:18

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 Sat May 16, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
294842730,4sleep029482-21tr08:10:160
56332644,12sleep20-21swapper/206:48:242
996299634,51cyclictest0-21swapper/308:31:103
9960996321,25cyclictest4284-21open_inodes06:45:271
248599630,3rtkit-daemon9502-21ssh06:54:353
207882633,22sleep20-21swapper/207:56:522
128472634,50sleep30-21swapper/307:45:203
9960996242,14cyclictest0-21swapper/108:10:281
180042623,11sleep00-21swapper/007:05:230
996199619,25cyclictest0-21swapper/207:35:302
996199619,25cyclictest0-21swapper/207:35:302
161352614,48sleep00-21swapper/006:05:130
996199605,14cyclictest0-21swapper/209:21:582
996099603,35cyclictest0-21swapper/108:41:171
9960996013,25cyclictest10549-21sed05:50:351
150962603,11sleep30-21swapper/310:11:373
996299593,48cyclictest0-21swapper/307:19:353
996199594,12cyclictest0-21swapper/209:05:052
996199593,42cyclictest0-21swapper/209:53:572
9961995923,13cyclictest9498-21munin-node10:05:032
9955995930,10cyclictest30673-21telnet07:25:110
275202593,49sleep00-21swapper/007:20:140
235962593,48sleep10-21swapper/109:36:041
9962995841,11cyclictest25800-21gltestperf09:40:123
996299583,36cyclictest22205-21aten2.4-expect05:10:163
996199585,13cyclictest1419-21runrttasks09:56:342
996199583,24cyclictest0-21swapper/208:50:102
9961995824,14cyclictest15733-21diskstats07:50:132
9961995813,27cyclictest0-21swapper/208:00:232
9960995838,13cyclictest0-21swapper/108:20:141
9962995740,10cyclictest15159-21chrt07:50:073
996299574,10cyclictest8801-21df07:40:143
996299573,12cyclictest0-21swapper/309:00:123
996299573,12cyclictest0-21swapper/309:00:123
9962995719,19cyclictest0-21swapper/308:29:253
9962995716,24cyclictest360-21ssh07:27:073
996199575,30cyclictest0-21swapper/207:25:272
996199574,35cyclictest0-21swapper/208:22:132
996199574,27cyclictest0-21swapper/209:10:192
996199573,49cyclictest0-21swapper/208:31:452
9961995714,24cyclictest17928-21forks05:00:202
996099574,37cyclictest0-21swapper/109:42:421
995599573,47cyclictest0-21swapper/008:55:170
995599573,25cyclictest0-21swapper/009:32:440
996299565,30cyclictest0-21swapper/307:37:053
996299565,30cyclictest0-21swapper/307:37:053
9962995621,12cyclictest0-21swapper/307:20:353
996199566,44cyclictest0-21swapper/209:59:562
996199566,21cyclictest2378-21ssh07:30:152
996199566,13cyclictest0-21swapper/208:41:442
996199564,36cyclictest0-21swapper/209:48:272
9961995624,12cyclictest0-21swapper/207:20:182
9961995618,23cyclictest0-21swapper/209:39:522
9961995611,25cyclictest0-21swapper/209:25:242
9960995639,10cyclictest2056-21expr05:35:171
9955995633,7cyclictest19632-21ssh07:55:200
9955995633,10cyclictest29333-21telnet05:25:140
254602564,45sleep00-21swapper/008:51:040
996299558,25cyclictest0-21swapper/308:18:093
9962995520,13cyclictest0-21swapper/306:15:013
9962995520,12cyclictest0-21swapper/307:12:413
9962995510,37cyclictest0-21swapper/308:50:203
996199553,37cyclictest0-21swapper/207:06:302
9961995528,9cyclictest7250irq/45-ahci07:03:092
9961995522,13cyclictest0-21swapper/208:35:182
9960995540,9cyclictest9498-21munin-node10:05:151
9960995539,11cyclictest0-21swapper/109:09:341
9960995536,13cyclictest0-21swapper/108:50:411
9960995522,11cyclictest0-21swapper/107:01:041
995599553,45cyclictest0-21swapper/009:40:070
248599550,6rtkit-daemon2484-21rtkit-daemon08:25:092
248599550,5rtkit-daemon2484-21rtkit-daemon08:12:322
248599550,5rtkit-daemon2484-21rtkit-daemon06:15:292
248599550,5rtkit-daemon2484-21rtkit-daemon06:15:292
248599550,5rtkit-daemon2484-21rtkit-daemon05:55:222
996299544,44cyclictest2691-21diskmemload09:05:043
996299544,44cyclictest0-21swapper/307:30:273
996299543,45cyclictest6139-21ssh10:00:033
996299543,11cyclictest0-21swapper/306:55:273
996299543,11cyclictest0-21swapper/306:55:273
996199546,29cyclictest10659-21perl06:55:172
996199546,29cyclictest10659-21perl06:55:172
996199543,36cyclictest0-21swapper/208:58:022
996199543,35cyclictest11743-21munin-node07:45:162
996199543,23cyclictest0-21swapper/208:48:192
9961995422,14cyclictest0-21swapper/208:15:182
9961995422,14cyclictest0-21swapper/207:10:172
9961995422,12cyclictest0-21swapper/208:09:552
9961995420,9cyclictest8941-21aten_r1power_cu05:50:142
9961995417,30cyclictest0-21swapper/207:15:172
996099545,29cyclictest0-21swapper/106:20:011
996099545,29cyclictest0-21swapper/106:20:011
996099544,28cyclictest0-21swapper/108:05:311
996099544,25cyclictest0-21swapper/106:50:101
9960995436,13cyclictest0-21swapper/110:10:031
9960995435,13cyclictest0-21swapper/105:15:281
9960995430,10cyclictest0-21swapper/108:25:271
9960995426,12cyclictest17407-21runrttasks07:51:551
9960995425,12cyclictest0-21swapper/107:55:241
304052542,9sleep00-21swapper/009:46:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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