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2026-01-09 - 10:57

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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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 Fri Jan 09, 2026 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
181202960,6sleep0132199cyclictest20:25:050
181202960,6sleep0132199cyclictest20:25:050
132499723,62cyclictest281ktimersoftd/220:44:532
132599664,55cyclictest19155-21gltestperf21:35:003
132399654,54cyclictest0-21swapper/123:54:531
132399654,44cyclictest32483-21latency_hist19:49:471
132399653,43cyclictest18284-21cat21:34:421
132399653,43cyclictest10953-21cat23:34:381
132499644,40cyclictest0-21swapper/223:40:122
132399643,42cyclictest16996-21cat20:24:441
132599633,51cyclictest9669-21sadc22:24:393
132399634,52cyclictest0-21swapper/121:25:001
132399634,52cyclictest0-21swapper/121:14:551
132399633,53cyclictest0-21swapper/119:24:461
132399633,41cyclictest28829-21cat23:04:381
132199634,53cyclictest0-21swapper/020:34:530
232322624,50sleep20-21swapper/219:29:582
132499611,54cyclictest0-21swapper/223:10:112
132399615,49cyclictest1419-21runrttasks00:05:081
132399615,49cyclictest1419-21runrttasks00:05:081
132399614,51cyclictest0-21swapper/119:34:461
132199613,50cyclictest0-21swapper/020:49:550
292152603,49sleep10-21swapper/100:10:051
132599603,49cyclictest0-21swapper/320:25:143
132599603,49cyclictest0-21swapper/320:25:143
132499605,49cyclictest0-21swapper/220:00:002
132499602,45cyclictest0-21swapper/222:21:252
132399605,48cyclictest0-21swapper/121:00:051
132399604,49cyclictest0-21swapper/120:49:441
132399604,49cyclictest0-21swapper/119:50:031
132399604,48cyclictest0-21swapper/118:50:001
132399603,51cyclictest0-21swapper/122:34:531
132399603,51cyclictest0-21swapper/122:34:531
132399603,50cyclictest0-21swapper/120:30:051
1321996032,12cyclictest0-21swapper/022:40:020
233002590,6sleep323301-21processes20:35:123
132599593,50cyclictest0-21swapper/300:04:533
132599593,50cyclictest0-21swapper/300:04:533
132399595,47cyclictest0-21swapper/121:39:521
132399593,51cyclictest0-21swapper/121:35:141
132399593,49cyclictest13468-21munin-node23:39:571
1323995915,14cyclictest0-21swapper/122:54:511
145202583,9sleep314594-21missed_timers23:40:003
132499583,48cyclictest0-21swapper/219:50:092
132499582,50cyclictest0-21swapper/219:10:352
132499582,48cyclictest0-21swapper/223:15:052
132399588,45cyclictest0-21swapper/120:39:571
132399585,47cyclictest0-21swapper/119:35:071
132399584,47cyclictest0-21swapper/100:03:141
132399583,49cyclictest0-21swapper/122:14:501
132399583,49cyclictest0-21swapper/118:55:151
132399583,48cyclictest30244-21munin-node22:00:011
132399583,48cyclictest0-21swapper/119:15:161
132599574,9cyclictest27718-21munin-run19:39:463
132599573,12cyclictest0-21swapper/323:29:543
132599572,48cyclictest0-21swapper/322:55:093
132499574,17cyclictest0-21swapper/221:35:002
132499574,13cyclictest10825-21crond23:34:372
132499572,49cyclictest0-21swapper/219:40:092
132499572,49cyclictest0-21swapper/219:40:092
132399574,47cyclictest0-21swapper/123:25:071
132399574,11cyclictest25501-21aten_r1power_cu21:49:521
132399574,11cyclictest25501-21aten_r1power_cu21:49:521
132399573,48cyclictest0-21swapper/119:00:131
132399573,47cyclictest5204-21munin-node20:00:101
132399573,47cyclictest0-21swapper/121:55:011
1321995731,12cyclictest0-21swapper/023:19:490
1321995731,12cyclictest0-21swapper/023:19:490
132199573,48cyclictest0-21swapper/020:29:590
132199573,47cyclictest14454-21systemd-cgroups22:34:390
132199573,47cyclictest0-21swapper/019:24:410
1321995729,13cyclictest0-21swapper/021:05:090
1321995729,13cyclictest0-21swapper/021:05:090
248599560,5rtkit-daemon2484-21rtkit-daemon23:44:482
204282562,9sleep00-21swapper/021:39:100
132599564,10cyclictest23729-21diskstats19:30:023
132599563,47cyclictest0-21swapper/321:50:013
132599563,47cyclictest0-21swapper/321:50:013
132599563,47cyclictest0-21swapper/320:20:113
1325995621,12cyclictest0-21swapper/320:50:193
132599562,48cyclictest0-21swapper/323:50:063
132599562,48cyclictest0-21swapper/323:24:473
132599562,48cyclictest0-21swapper/319:15:193
132599562,47cyclictest0-21swapper/322:41:043
132499563,29cyclictest0-21swapper/220:39:542
132499562,47cyclictest0-21swapper/221:00:072
132399565,45cyclictest7516-21munin-node22:20:021
132399564,45cyclictest24908-21sshd21:45:231
132399563,47cyclictest32635-21munin-node22:04:551
132399563,47cyclictest0-21swapper/120:09:551
132399563,47cyclictest0-21swapper/119:13:421
132399563,46cyclictest20307-21runrttasks23:53:321
132399563,46cyclictest19055-21sshd22:42:211
132399563,10cyclictest0-21swapper/122:24:561
132199563,48cyclictest0-21swapper/020:55:000
132199563,48cyclictest0-21swapper/019:45:170
132199563,48cyclictest0-21swapper/018:59:590
132199563,47cyclictest0-21swapper/021:25:180
132199563,47cyclictest0-21swapper/018:54:570
132599555,27cyclictest0-21swapper/319:45:073
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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