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2026-05-10 - 09:33

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 Sun May 10, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2485991240,4rtkit-daemon2484-21rtkit-daemon19:19:003
1482821170,62chrt121850irq/46-eth018:56:400
1654699984,75cyclictest0-21swapper/018:19:310
1654699973,25cyclictest26708-21cpuspeed_turbos20:51:140
1654699954,29cyclictest0-21swapper/019:01:250
1654699954,29cyclictest0-21swapper/019:01:250
16546999410,69cyclictest0-21swapper/021:41:140
1654699933,75cyclictest0-21swapper/019:28:200
1654999923,71cyclictest0-21swapper/222:17:482
1654699926,19cyclictest31815-21ssh20:57:140
16546999220,12cyclictest0-21swapper/018:41:060
1654999915,63cyclictest0-21swapper/222:07:052
16549999110,13cyclictest0-21swapper/220:40:402
1654699914,28cyclictest0-21swapper/022:01:350
16546999129,54cyclictest0-21swapper/017:46:220
16546999121,58cyclictest0-21swapper/022:17:390
16546999117,12cyclictest0-21swapper/020:18:420
1654999903,80cyclictest0-21swapper/219:17:062
1654699908,67cyclictest0-21swapper/021:51:200
1654699904,79cyclictest0-21swapper/020:31:280
1654699904,79cyclictest0-21swapper/020:31:280
1654699904,78cyclictest0-21swapper/021:37:270
1654699904,25cyclictest1419-21runrttasks19:14:350
1654699894,25cyclictest0-21swapper/022:06:170
1654699885,26cyclictest0-21swapper/019:34:570
1654699884,76cyclictest0-21swapper/020:36:540
1654699884,75cyclictest0-21swapper/021:21:160
1654699884,22cyclictest0-21swapper/020:44:420
1654699884,12cyclictest0-21swapper/021:50:030
1654699874,75cyclictest0-21swapper/019:51:200
1654699874,75cyclictest0-21swapper/018:11:250
1654699874,25cyclictest0-21swapper/021:58:050
1654699874,23cyclictest0-21swapper/022:11:100
1654699874,23cyclictest0-21swapper/019:36:420
1654699874,14cyclictest0-21swapper/020:26:350
1654699874,14cyclictest0-21swapper/020:26:350
1654699873,22cyclictest31725-21munin-node20:11:230
1654999864,64cyclictest0-21swapper/218:46:242
1654999864,61cyclictest0-21swapper/221:06:482
1654999864,61cyclictest0-21swapper/221:06:482
16546998650,31cyclictest0-21swapper/019:59:270
1654699865,24cyclictest0-21swapper/020:21:230
1654699864,75cyclictest0-21swapper/021:11:320
1654699864,75cyclictest0-21swapper/021:11:320
1654699864,23cyclictest0-21swapper/019:18:510
16546998615,12cyclictest0-21swapper/019:07:510
1654999854,73cyclictest0-21swapper/220:26:282
1654999854,73cyclictest0-21swapper/220:26:282
1654999854,7cyclictest1736-21ssh20:13:372
1654999853,75cyclictest0-21swapper/221:31:172
1654999853,58cyclictest0-21swapper/219:47:162
1654999853,58cyclictest0-21swapper/219:47:162
16549998518,10cyclictest11851-21grep19:41:182
1654699858,9cyclictest121850irq/46-eth019:50:170
1654699858,9cyclictest121850irq/46-eth019:50:170
1654699855,72cyclictest0-21swapper/021:16:250
1654699854,74cyclictest0-21swapper/018:52:420
1654699854,66cyclictest0-21swapper/018:26:240
1654699854,23cyclictest0-21swapper/021:06:030
1654699854,23cyclictest0-21swapper/021:06:030
1654699853,21cyclictest11527-21munin-node19:41:310
1654699853,14cyclictest0-21swapper/020:04:590
1654699853,10cyclictest21492-21ssh21:31:130
1654999845,19cyclictest0-21swapper/221:37:182
1654999844,72cyclictest0-21swapper/221:11:172
1654999844,72cyclictest0-21swapper/221:11:172
1654999843,73cyclictest0-21swapper/218:57:032
1654999843,64cyclictest25078-21kworker/u8:018:26:382
1654999843,61cyclictest0-21swapper/221:56:322
16549998415,9cyclictest28222-21grep20:51:342
1654699844,26cyclictest0-21swapper/021:01:210
1654699844,23cyclictest0-21swapper/020:47:040
1654699843,74cyclictest0-21swapper/019:23:320
16546998416,12cyclictest0-21swapper/020:06:230
1654999833,73cyclictest0-21swapper/221:21:092
1654999833,72cyclictest2333-21aten_r1power_en18:36:182
1654699834,21cyclictest0-21swapper/017:11:210
1654699833,72cyclictest27778-21tr18:21:210
1654699833,72cyclictest27778-21tr18:21:210
1654699833,19cyclictest0-21swapper/021:26:120
16546998312,14cyclictest0-21swapper/018:51:050
1654999824,70cyclictest0-21swapper/221:51:102
1654999824,70cyclictest0-21swapper/221:41:312
1654999824,70cyclictest0-21swapper/221:19:162
1654999823,72cyclictest0-21swapper/222:12:382
1654999823,72cyclictest0-21swapper/221:28:282
1654999823,72cyclictest0-21swapper/219:21:202
1654999823,71cyclictest0-21swapper/220:01:132
1654999823,70cyclictest0-21swapper/220:41:242
1654999815,69cyclictest0-21swapper/219:04:522
1654999815,69cyclictest0-21swapper/219:04:522
1654999814,70cyclictest0-21swapper/221:46:212
1654999813,71cyclictest0-21swapper/220:46:152
1654999813,70cyclictest0-21swapper/220:07:372
1654999813,12cyclictest0-21swapper/219:27:382
16549998121,51cyclictest1419-21runrttasks17:49:442
1654999804,69cyclictest0-21swapper/220:21:302
1654999804,69cyclictest0-21swapper/216:56:232
1654999804,68cyclictest0-21swapper/220:34:272
1654999804,68cyclictest0-21swapper/220:34:272
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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