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2026-09-03 - 01:52

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 Thu Sep 03, 2026 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
219499960,6rtkit-daemon0-21swapper/220:21:352
1719899923,65cyclictest0-21swapper/321:17:543
1719899914,69cyclictest0-21swapper/320:39:163
1719899914,69cyclictest0-21swapper/320:39:163
1719899914,66cyclictest0-21swapper/322:27:423
1719899904,64cyclictest0-21swapper/320:18:433
115952890,4sleep2281ktimersoftd/220:28:572
1719899884,68cyclictest0-21swapper/322:55:443
1719899883,21cyclictest0-21swapper/320:55:563
17198998810,14cyclictest0-21swapper/321:20:583
17198998810,14cyclictest0-21swapper/321:20:583
1719899874,22cyclictest0-21swapper/321:49:173
1719899873,25cyclictest0-21swapper/321:01:283
1719899865,14cyclictest0-21swapper/320:23:223
1719899864,73cyclictest0-21swapper/320:03:593
1719899864,65cyclictest0-21swapper/320:13:013
1719899864,63cyclictest0-21swapper/321:44:023
1719899864,63cyclictest0-21swapper/321:41:283
1719899864,23cyclictest0-21swapper/321:09:163
1719899864,21cyclictest0-21swapper/321:03:533
1719899863,66cyclictest0-21swapper/322:38:403
1719899863,66cyclictest0-21swapper/322:38:403
1719899855,23cyclictest0-21swapper/319:54:543
1719899854,74cyclictest0-21swapper/319:49:163
1719899854,64cyclictest0-21swapper/321:24:273
1719899854,23cyclictest0-21swapper/322:49:593
1719899845,72cyclictest0-21swapper/322:14:543
1719899845,16cyclictest0-21swapper/322:19:493
1719899844,60cyclictest0-21swapper/318:58:583
1719899843,21cyclictest0-21swapper/318:38:573
17198998415,9cyclictest19537-21memory21:29:033
17198998410,10cyclictest15862-21proc_pri20:34:103
1719899834,73cyclictest0-21swapper/322:10:313
1719899834,72cyclictest0-21swapper/321:54:083
1719899834,23cyclictest0-21swapper/322:59:543
1719899834,22cyclictest0-21swapper/322:33:523
1719899833,24cyclictest0-21swapper/320:29:073
17198998323,54cyclictest22291-21needreboot20:44:053
1719899825,22cyclictest0-21swapper/322:30:193
1719899824,61cyclictest0-21swapper/319:45:163
1719899823,60cyclictest0-21swapper/320:24:153
1719899823,22cyclictest0-21swapper/320:03:093
1719899814,70cyclictest0-21swapper/318:54:153
1719899814,22cyclictest0-21swapper/319:42:053
1719899813,61cyclictest0-21swapper/318:24:093
1719899813,23cyclictest1124-21snmpd22:44:553
17198998117,9cyclictest107550irq/46-eth021:33:513
1719899804,69cyclictest0-21swapper/322:04:063
1719899804,59cyclictest0-21swapper/319:04:053
1719899804,23cyclictest0-21swapper/322:03:183
1719899804,23cyclictest0-21swapper/322:03:183
1719899803,21cyclictest0-21swapper/320:51:533
17198998013,11cyclictest107550irq/46-eth019:28:453
1719899794,56cyclictest0-21swapper/319:15:163
1719899794,56cyclictest0-21swapper/319:15:163
1719899794,21cyclictest0-21swapper/317:44:003
1719899794,16cyclictest0-21swapper/318:47:403
1719899793,21cyclictest19064-21diskmemload23:07:233
1719899784,68cyclictest0-21swapper/317:39:023
1719899784,67cyclictest0-21swapper/318:35:093
1719899784,67cyclictest0-21swapper/318:35:093
1719899783,9cyclictest107550irq/46-eth018:08:483
17196997826,32cyclictest14415-21open_inodes22:59:051
1719899773,24cyclictest9927-21latency_hist19:38:453
17198997723,46cyclictest3494-21unixbench-2d18:14:233
1719899764,65cyclictest0-21swapper/318:29:103
1719899757,13cyclictest0-21swapper/319:33:463
1719899755,15cyclictest0-21swapper/317:56:003
1719899755,15cyclictest0-21swapper/317:56:003
219499740,5rtkit-daemon0-21swapper/120:44:270
1719899744,12cyclictest0-21swapper/318:19:003
1719899743,24cyclictest0-21swapper/317:51:453
17198997422,46cyclictest29840-21unixbench_singl19:09:193
17197997445,14cyclictest0-21swapper/220:34:042
17197997442,10cyclictest0-21swapper/220:54:132
219499730,6rtkit-daemon0-21swapper/118:24:170
219499730,6rtkit-daemon0-21swapper/117:39:190
1719899735,21cyclictest0-21swapper/318:09:113
1719899733,13cyclictest0-21swapper/319:19:023
17198997321,44cyclictest28087-21missed_timers17:59:123
1719899723,62cyclictest0-21swapper/318:53:463
1719699722,61cyclictest0-21swapper/120:20:481
219499700,6rtkit-daemon0-21swapper/122:59:360
1719799706,55cyclictest1227-21runrttasks22:32:402
1719699685,55cyclictest0-21swapper/121:09:071
1719699685,14cyclictest0-21swapper/123:06:461
219499670,6rtkit-daemon0-21swapper/117:38:490
17197996722,27cyclictest0-21swapper/221:45:402
17195996750,10cyclictest27696-21sort20:04:020
219499660,5rtkit-daemon0-21swapper/118:21:100
1719699664,55cyclictest0-21swapper/122:49:081
219499650,7rtkit-daemon0-21swapper/120:41:121
219499650,7rtkit-daemon0-21swapper/120:41:121
1719899654,18cyclictest0-21swapper/317:38:493
1719699646,51cyclictest0-21swapper/119:14:091
1719699646,51cyclictest0-21swapper/119:14:091
1719699645,52cyclictest0-21swapper/120:14:191
1719699644,53cyclictest0-21swapper/120:08:491
17197996338,8cyclictest32172-21diskstats21:48:582
1719699636,48cyclictest0-21swapper/121:54:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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