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2026-03-25 - 20:57

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 Wed Mar 25, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
11814991014,13cyclictest0-21swapper/010:58:440
118149910126,57cyclictest0-21swapper/007:38:480
118149910126,57cyclictest0-21swapper/007:38:480
248599990,7rtkit-daemon2484-21rtkit-daemon10:41:272
11814999821,10cyclictest25229-21cpuspeed09:38:560
1182199963,75cyclictest0-21swapper/309:16:123
1181499964,30cyclictest0-21swapper/009:36:380
1181499964,29cyclictest0-21swapper/005:34:030
11814999615,22cyclictest3427-21fschecks_count09:53:590
11814999510,24cyclictest0-21swapper/007:54:200
1182199944,66cyclictest0-21swapper/310:23:523
1182199944,66cyclictest0-21swapper/310:23:523
1181499946,76cyclictest0-21swapper/007:17:460
11814999436,51cyclictest17669-21gltestperf05:44:120
11814999314,9cyclictest14941-21rm08:34:150
11814999313,12cyclictest0-21swapper/006:23:510
1182199925,80cyclictest0-21swapper/310:00:303
11814999214,12cyclictest0-21swapper/010:33:590
1182199913,82cyclictest13223-21sed09:19:153
1182199913,81cyclictest4819-21aten_r1power_fr09:08:543
1181499915,28cyclictest0-21swapper/007:24:240
11814999140,44cyclictest1596-21gltestperf10:38:590
1181499914,80cyclictest0-21swapper/009:06:450
1181499914,80cyclictest0-21swapper/009:06:450
1181499914,80cyclictest0-21swapper/009:03:440
1181499914,80cyclictest0-21swapper/009:03:440
1181499914,28cyclictest0-21swapper/009:27:040
1181499914,28cyclictest0-21swapper/008:04:100
1181499913,9cyclictest10154-21munin-node10:03:570
11814999117,9cyclictest17378-21ssh10:14:040
1182199904,80cyclictest0-21swapper/309:50:493
1182199903,80cyclictest10440-21cpuspeed_turbos08:29:003
1181499904,26cyclictest0-21swapper/009:22:250
1181499904,26cyclictest0-21swapper/008:23:000
1181499904,26cyclictest0-21swapper/008:23:000
11814999017,10cyclictest10783-21ssh08:29:040
248599890,5rtkit-daemon2484-21rtkit-daemon06:15:372
248599890,5rtkit-daemon2484-21rtkit-daemon06:15:372
1182199895,65cyclictest25496-21munin-node08:04:173
1182199894,78cyclictest30751-21hwlatdetect10:34:013
1182199894,70cyclictest0-21swapper/308:52:413
1182199894,56cyclictest0-21swapper/310:44:423
1181499898,22cyclictest0-21swapper/010:44:100
1181499896,7cyclictest0-21swapper/008:24:190
1181499894,32cyclictest0-21swapper/005:59:130
1181499894,29cyclictest0-21swapper/006:49:220
1181499894,24cyclictest0-21swapper/010:48:560
1181499894,24cyclictest0-21swapper/009:31:070
1182199883,63cyclictest0-21swapper/307:34:183
1182199883,63cyclictest0-21swapper/307:34:183
1182199883,52cyclictest0-21swapper/310:30:583
1181499884,76cyclictest0-21swapper/008:56:270
1181499884,26cyclictest0-21swapper/010:18:530
1181499884,13cyclictest0-21swapper/010:25:150
1181499884,13cyclictest0-21swapper/010:25:150
1181499884,12cyclictest0-21swapper/010:09:140
1181499883,77cyclictest28737-21ssh09:43:560
1181499883,77cyclictest28737-21ssh09:43:560
11814998810,17cyclictest0-21swapper/010:58:160
1182199878,60cyclictest18173-21ntpq08:39:133
1182199875,60cyclictest0-21swapper/310:20:093
1182199874,65cyclictest30535-21ssh09:45:223
1182199874,65cyclictest30535-21ssh09:45:223
1182199874,64cyclictest0-21swapper/308:18:423
1182199874,64cyclictest0-21swapper/307:54:163
1182199874,50cyclictest20792-21diskstats08:44:033
1181499875,26cyclictest0-21swapper/008:48:170
1181499874,35cyclictest4830-21munin-node09:08:550
1181499874,23cyclictest0-21swapper/007:41:230
1181499874,12cyclictest0-21swapper/008:00:180
1182199864,76cyclictest0-21swapper/308:13:463
1182199864,65cyclictest0-21swapper/309:54:583
1182199864,64cyclictest0-21swapper/308:21:123
1182199864,64cyclictest0-21swapper/308:21:123
1182199863,77cyclictest0-21swapper/308:24:133
1182199863,63cyclictest2656-21ssh09:04:093
1182199863,63cyclictest2656-21ssh09:04:093
1182199863,51cyclictest0-21swapper/310:56:533
11821998613,68cyclictest23340-21sed09:34:153
1181499864,33cyclictest0-21swapper/007:31:080
1181499864,12cyclictest0-21swapper/006:34:060
1181499864,12cyclictest0-21swapper/005:49:260
1181499863,22cyclictest0-21swapper/010:02:240
1181499863,21cyclictest1174-21ssh09:49:170
1182199856,62cyclictest0-21swapper/310:11:293
1182199855,74cyclictest0-21swapper/307:44:213
1182199854,64cyclictest0-21swapper/309:42:293
1182199853,75cyclictest0-21swapper/310:51:463
1182199853,50cyclictest0-21swapper/307:53:013
1181499854,13cyclictest0-21swapper/008:38:560
1181499854,11cyclictest10626-21chrt09:16:360
11814998523,10cyclictest31838-21ssh08:13:200
11814998516,11cyclictest0-21swapper/010:29:140
11814998514,10cyclictest0-21swapper/007:48:350
11814998511,9cyclictest121850irq/46-eth007:49:000
1182199844,74cyclictest0-21swapper/309:29:123
1182199844,74cyclictest0-21swapper/309:23:523
1182199844,58cyclictest0-21swapper/307:41:013
1182199843,63cyclictest31759-21ssh08:59:133
1182199843,63cyclictest31759-21ssh08:59:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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