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2026-08-30 - 23:53

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 Aug 30, 2026 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2134521640,11sleep22889899cyclictest06:32:222
2889699994,25cyclictest30194-21cpu09:32:111
2889699954,30cyclictest0-21swapper/108:27:001
2889699905,29cyclictest0-21swapper/108:47:151
28896996946,8cyclictest7150irq/45-ahci09:12:001
5322653,13sleep20-21swapper/207:57:242
2889999654,28cyclictest0-21swapper/309:42:183
2889399630,14cyclictest10585-21ssh09:51:450
184712634,51sleep30-21swapper/310:52:093
2889999624,41cyclictest0-21swapper/309:52:083
219499620,4rtkit-daemon2193-21rtkit-daemon10:08:503
2889399614,48cyclictest0-21swapper/009:17:110
2889399614,27cyclictest0-21swapper/010:47:140
219499610,5rtkit-daemon2193-21rtkit-daemon09:31:593
2889899603,21cyclictest27262-21ssh11:05:182
2889899603,21cyclictest27262-21ssh11:05:182
28898996027,26cyclictest0-21swapper/209:24:062
2889399606,32cyclictest5581-21unixbench_singl08:52:330
2889399606,32cyclictest5581-21unixbench_singl08:52:330
2889399606,26cyclictest0-21swapper/009:12:110
28899995915,27cyclictest0-21swapper/308:11:133
2889999584,14cyclictest1124-21snmpd06:47:173
2889999584,14cyclictest1124-21snmpd06:47:173
2889699586,28cyclictest25778-21cpuspeed_turbos06:42:181
2889399585,46cyclictest0-21swapper/010:22:190
28893995838,11cyclictest572-21cpuspeed_turbos08:47:130
28893995837,13cyclictest0-21swapper/007:57:170
2889399583,48cyclictest0-21swapper/010:11:560
68252573,46sleep20-21swapper/210:32:372
38442572,9sleep10-21swapper/109:41:081
38442572,9sleep10-21swapper/109:41:081
2889999575,28cyclictest0-21swapper/308:32:293
2889999574,27cyclictest0-21swapper/310:13:363
28899995720,10cyclictest5465-21sed10:32:113
2889899579,33cyclictest0-21swapper/208:27:132
2889899573,45cyclictest0-21swapper/210:07:062
28898995711,27cyclictest0-21swapper/209:32:322
2889699574,36cyclictest0-21swapper/110:32:081
28893995739,11cyclictest14419-21gltestperf06:17:260
28893995710,31cyclictest1240-21cpuspeed_turbos09:37:100
28893995710,31cyclictest1240-21cpuspeed_turbos09:37:100
219499570,6rtkit-daemon2193-21rtkit-daemon08:32:013
2889999565,42cyclictest0-21swapper/310:36:583
2889999565,32cyclictest0-21swapper/310:22:233
28899995642,8cyclictest18366-21gltestperf10:02:173
2889899567,40cyclictest0-21swapper/209:51:452
2889899564,44cyclictest1227-21runrttasks06:48:162
2889899564,44cyclictest1227-21runrttasks06:48:162
2889699568,25cyclictest0-21swapper/110:52:191
28896995627,13cyclictest0-21swapper/110:04:091
2889399568,41cyclictest23699-21grep08:32:200
2889399566,18cyclictest32757-21taskset09:35:490
2889399564,44cyclictest0-21swapper/007:47:270
2889399563,47cyclictest5538-21taskset07:07:180
28893995617,30cyclictest7415-21cstates08:57:140
28893995610,25cyclictest0-21swapper/010:19:390
28893995610,25cyclictest0-21swapper/010:19:390
182082563,11sleep30-21swapper/309:12:283
75272554,43sleep30-21swapper/307:12:143
2889999555,32cyclictest0-21swapper/310:01:573
2889999554,33cyclictest0-21swapper/308:02:243
28898995539,10cyclictest8220-21grep08:07:342
2889899553,44cyclictest0-21swapper/207:56:152
28898995519,22cyclictest21636-21diskmemload08:18:252
2889399558,31cyclictest18956-21rt-features10:02:270
2889399554,44cyclictest0-21swapper/008:42:150
2889399554,42cyclictest0-21swapper/008:27:150
28893995537,10cyclictest25614-21wc11:02:160
28893995537,10cyclictest25614-21wc11:02:160
2889399553,45cyclictest0-21swapper/008:12:160
2889399553,45cyclictest0-21swapper/008:12:160
28893995513,26cyclictest0-21swapper/008:26:380
28893995511,20cyclictest0-21swapper/009:22:120
265122553,45sleep326542-21latency06:42:283
219499550,6rtkit-daemon2193-21rtkit-daemon08:24:093
2889999544,36cyclictest0-21swapper/308:56:333
2889999544,36cyclictest0-21swapper/308:56:333
2889999544,34cyclictest0-21swapper/310:51:173
2889999544,30cyclictest0-21swapper/306:27:293
28899995421,14cyclictest0-21swapper/305:57:303
28899995416,20cyclictest19731-21kworker/3:009:37:093
28899995416,20cyclictest19731-21kworker/3:009:37:093
28898995438,9cyclictest22226-21gltestperf10:57:142
28898995434,12cyclictest2464-21grep10:27:152
2889699544,30cyclictest156862ssh08:20:461
2889699544,27cyclictest10041-21sadc09:01:591
2889399547,34cyclictest0-21swapper/008:18:420
2889399544,42cyclictest0-21swapper/007:52:210
28893995430,18cyclictest1547-21nscd07:45:240
28893995412,25cyclictest0-21swapper/008:02:130
28893995411,25cyclictest0-21swapper/009:07:280
248322547,40sleep10-21swapper/110:12:161
219499540,5rtkit-daemon2193-21rtkit-daemon10:25:042
219499540,5rtkit-daemon2193-21rtkit-daemon10:17:123
219499540,5rtkit-daemon2193-21rtkit-daemon10:17:123
219499540,5rtkit-daemon2193-21rtkit-daemon09:02:152
219499540,5rtkit-daemon2193-21rtkit-daemon08:42:162
185282544,42sleep20-21swapper/207:32:332
185282544,42sleep20-21swapper/207:32:332
71752532,9sleep30-21swapper/307:10:373
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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