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2026-05-13 - 06:43

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 Wed May 13, 2026 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32248991105,98cyclictest0-21swapper/320:53:383
32246991074,49cyclictest27781-21rm21:13:331
322459910734,9cyclictest1419-21runrttasks19:46:190
322459910539,11cyclictest0-21swapper/019:07:440
322459910331,12cyclictest0-21swapper/020:08:440
32246991024,48cyclictest0-21swapper/119:18:381
322459910238,8cyclictest9906-21ps19:58:430
32245991023,50cyclictest0-21swapper/020:58:110
322459910133,12cyclictest0-21swapper/018:48:330
32245991013,49cyclictest19010-21gltestperf21:48:320
322459910039,9cyclictest1419-21runrttasks20:14:450
32245999936,11cyclictest0-21swapper/019:28:260
3224699984,48cyclictest1419-21runrttasks19:32:441
3224599985,49cyclictest0-21swapper/018:53:380
32245999837,7cyclictest26220-21rm20:23:330
3224699964,53cyclictest0-21swapper/118:53:491
3224699964,51cyclictest0-21swapper/120:43:231
3224699964,48cyclictest15350-21nscd19:28:141
32245999638,10cyclictest0-21swapper/021:23:390
32245999637,13cyclictest0-21swapper/019:48:460
32245999637,10cyclictest0-21swapper/019:38:010
3224599963,55cyclictest0-21swapper/020:34:190
32248999539,9cyclictest31344-21telnet17:53:313
32246999537,12cyclictest0-21swapper/121:38:451
32246999537,12cyclictest0-21swapper/121:38:451
32246999531,11cyclictest0-21swapper/119:14:351
32245999538,12cyclictest0-21swapper/021:13:110
32245999436,13cyclictest0-21swapper/020:48:120
32246999311,45cyclictest0-21swapper/119:43:591
3224599933,50cyclictest0-21swapper/019:15:520
3224599933,49cyclictest0-21swapper/021:28:330
3224699928,15cyclictest0-21swapper/119:03:161
3224699924,50cyclictest25797-21yum-updatesd-he19:34:211
32245999237,10cyclictest0-21swapper/017:13:400
32245999234,13cyclictest0-21swapper/022:08:320
3224599923,50cyclictest0-21swapper/021:19:190
3224599923,50cyclictest0-21swapper/021:03:270
3224599923,48cyclictest0-21swapper/017:03:220
32245999228,11cyclictest0-21swapper/020:32:220
32246999129,12cyclictest0-21swapper/120:38:421
32245999138,10cyclictest0-21swapper/020:48:390
3224599913,51cyclictest0-21swapper/021:33:430
3224599903,49cyclictest0-21swapper/018:08:180
32246998938,11cyclictest0-21swapper/121:18:221
32246998937,12cyclictest0-21swapper/120:18:471
32245998935,9cyclictest0-21swapper/021:56:390
32245998935,10cyclictest0-21swapper/016:48:510
32245998834,10cyclictest0-21swapper/022:00:170
264942860,2sleep3361ktimersoftd/321:13:113
32245998535,10cyclictest0-21swapper/020:22:390
32245998435,10cyclictest0-21swapper/021:13:400
32247996810,35cyclictest281ktimersoftd/221:38:372
32247996810,35cyclictest281ktimersoftd/221:38:372
32246996841,13cyclictest0-21swapper/122:13:201
3224599684,47cyclictest30338-21latency_hist19:43:150
3224699675,54cyclictest0-21swapper/121:43:221
3224699674,55cyclictest0-21swapper/121:23:311
32247996623,28cyclictest1419-21runrttasks20:55:512
32246996640,12cyclictest0-21swapper/121:34:151
41352654,12sleep20-21swapper/221:27:382
3224699659,49cyclictest21635-21crond20:18:121
193532650,2sleep00-21swapper/019:25:090
3224699644,53cyclictest0-21swapper/119:38:311
32245996437,12cyclictest0-21swapper/020:58:320
32245996437,12cyclictest0-21swapper/020:58:320
3224599643,53cyclictest0-21swapper/021:38:420
3224599643,53cyclictest0-21swapper/021:38:420
32248996334,13cyclictest0-21swapper/319:43:473
32247996323,29cyclictest0-21swapper/220:43:452
3224699634,52cyclictest0-21swapper/121:58:201
32245996338,12cyclictest0-21swapper/018:58:330
3224599633,53cyclictest0-21swapper/018:43:160
32248996232,13cyclictest0-21swapper/319:38:273
3224899623,50cyclictest16060-21ntp_states21:43:383
3224799625,15cyclictest0-21swapper/220:03:362
32246996247,10cyclictest17429-21gltestperf20:58:311
32246996247,10cyclictest17429-21gltestperf20:58:311
32246996242,9cyclictest0-21swapper/119:48:461
3224699624,51cyclictest0-21swapper/120:53:351
3224699624,51cyclictest0-21swapper/120:30:201
32246996234,12cyclictest0-21swapper/120:04:371
3224699623,53cyclictest0-21swapper/121:53:101
32245996236,12cyclictest0-21swapper/020:08:140
32245996236,12cyclictest0-21swapper/019:08:410
98502615,11sleep20-21swapper/219:12:262
3224699614,51cyclictest0-21swapper/121:28:321
3224699614,50cyclictest10459-21diskstats20:48:301
3224699614,49cyclictest0-21swapper/118:18:171
32246996136,12cyclictest0-21swapper/122:03:421
3224699613,50cyclictest5639-21cut16:58:391
32245996138,9cyclictest2660-21tail16:53:330
32245996138,9cyclictest2660-21tail16:53:330
32248996036,9cyclictest11937-21ssh19:13:473
3224699604,49cyclictest8047-21sort19:08:401
3224699603,51cyclictest0-21swapper/118:48:421
32245996036,9cyclictest28390-21head22:03:220
32245996035,11cyclictest0-21swapper/019:53:500
3224599603,51cyclictest0-21swapper/022:13:430
3224599603,48cyclictest14885-21ssh21:43:220
32248995930,13cyclictest0-21swapper/321:13:313
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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