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2026-03-07 - 18:16

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 Sat Mar 07, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
51499884,34cyclictest0-21swapper/108:16:001
51499883,25cyclictest7555-21timerandwakeup09:21:101
51499864,32cyclictest0-21swapper/110:36:001
51499864,32cyclictest0-21swapper/110:36:001
51499863,35cyclictest31356-21gltestperf10:45:561
51499863,31cyclictest0-21swapper/109:52:401
514998625,9cyclictest3063-21basename05:55:471
516998531,45cyclictest18361-21gltestperf11:15:553
51499853,34cyclictest3074-21ssh09:15:581
54102840,4sleep334-21rcuc/307:06:053
54102840,4sleep334-21rcuc/307:06:053
516998426,49cyclictest0-21swapper/309:14:083
516998426,49cyclictest0-21swapper/309:14:083
51499844,32cyclictest0-21swapper/109:41:051
51499844,12cyclictest0-21swapper/110:09:151
51499843,34cyclictest0-21swapper/111:01:081
514998426,9cyclictest31357-21fschecks_count08:01:001
514998425,11cyclictest16047-21gltestperf06:21:051
514998425,11cyclictest16047-21gltestperf06:21:051
514998425,10cyclictest13425-21fschecks_count08:31:001
514998425,10cyclictest13425-21fschecks_count08:31:001
516998336,27cyclictest1571-21grep05:51:053
516998325,50cyclictest0-21swapper/309:35:383
51499834,34cyclictest0-21swapper/106:41:151
51499834,12cyclictest0-21swapper/107:01:211
51499833,33cyclictest0-21swapper/108:00:111
516998232,28cyclictest4245-21unixbench_singl09:16:143
516998227,36cyclictest0-21swapper/306:02:303
51499824,30cyclictest0-21swapper/109:26:041
51499824,12cyclictest0-21swapper/111:11:011
514998232,8cyclictest8879-21head06:06:061
51499823,33cyclictest0-21swapper/109:46:071
51499823,32cyclictest0-21swapper/109:56:061
51499823,32cyclictest0-21swapper/109:56:061
51499823,12cyclictest0-21swapper/108:36:041
51499823,10cyclictest1508-21cpuspeed_turbos10:50:501
516998132,17cyclictest5474-21sort10:55:593
51499814,34cyclictest0-21swapper/109:14:081
51499814,34cyclictest0-21swapper/109:14:081
51499814,32cyclictest0-21swapper/110:31:111
51499814,30cyclictest0-21swapper/106:16:101
51499814,13cyclictest0-21swapper/110:17:471
514998130,8cyclictest10686-21cpuspeed_turbos08:25:531
51499813,34cyclictest0-21swapper/110:21:041
514998125,10cyclictest18108-21cstates10:25:511
514998118,9cyclictest31958-21munin-node06:56:171
516998035,25cyclictest23980-21gltestperf09:46:023
516998034,31cyclictest29579-21telnet09:05:523
516998034,28cyclictest139991munin-node07:26:153
516998029,31cyclictest0-21swapper/310:50:363
51499804,12cyclictest0-21swapper/110:11:271
51499803,31cyclictest0-21swapper/106:47:391
516997929,43cyclictest0-21swapper/309:21:103
516997929,42cyclictest0-21swapper/309:36:063
516997916,55cyclictest0-21swapper/308:21:533
51499794,33cyclictest0-21swapper/108:10:411
248599790,5rtkit-daemon2484-21rtkit-daemon07:47:342
248599790,5rtkit-daemon2484-21rtkit-daemon07:47:342
516997831,38cyclictest27188-21aten_r1power_en09:00:513
516997830,31cyclictest11517-21ssh09:26:553
516997828,43cyclictest0-21swapper/308:02:293
516997828,32cyclictest0-21swapper/310:21:333
516997827,36cyclictest0-21swapper/310:42:033
516997827,36cyclictest0-21swapper/310:42:033
516997827,30cyclictest22234-21sed10:30:593
516997825,33cyclictest0-21swapper/310:02:433
516997823,35cyclictest0-21swapper/311:15:143
51499783,35cyclictest0-21swapper/109:35:591
514997829,8cyclictest20942-21munin-run07:40:421
516997734,26cyclictest20540-21ssh09:40:573
516997725,34cyclictest0-21swapper/306:46:133
51499775,32cyclictest0-21swapper/111:06:051
51499773,24cyclictest1859-21ssh10:01:011
516997634,27cyclictest27187-21tune2fs09:50:553
516997631,38cyclictest9200-21grep11:01:073
516997629,31cyclictest26498-21awk06:41:193
516997530,39cyclictest4705-21grep05:56:163
516997530,26cyclictest17381-21crond06:25:453
516997530,26cyclictest17381-21crond06:25:453
516997526,31cyclictest0-21swapper/308:00:433
516997524,42cyclictest12175-21sh11:06:043
516997429,36cyclictest24596-21sh10:35:523
516997429,36cyclictest24596-21sh10:35:523
516997427,40cyclictest0-21swapper/306:51:113
515997453,12cyclictest8048-21grep07:11:062
51499746,29cyclictest0-21swapper/108:20:561
51499744,31cyclictest0-21swapper/110:41:561
51499744,31cyclictest0-21swapper/110:41:561
51499743,34cyclictest0-21swapper/109:34:051
514997428,8cyclictest28196-21sort09:01:031
514997425,10cyclictest0-21swapper/111:17:091
516997330,28cyclictest6004-21timerwakeupswit10:06:133
516997328,37cyclictest298391munin-node09:56:133
516997328,37cyclictest298391munin-node09:56:133
516997327,36cyclictest8135-21ssh10:10:513
516997324,32cyclictest0-21swapper/307:36:003
514997325,9cyclictest22827-21unixbench-2d07:41:161
514997316,11cyclictest0-21swapper/107:10:541
516997230,35cyclictest1419-21runrttasks07:00:573
516997230,26cyclictest17618-21munin-node06:25:593
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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