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2026-06-28 - 08:12

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 Jun 28, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15993997444,24cyclictest0-21swapper/219:01:472
1599299716,13cyclictest0-21swapper/121:36:411
116512718,55sleep00-21swapper/023:07:070
231232703,41sleep00-21swapper/023:25:090
1598999703,61cyclictest0-21swapper/022:56:570
15989996913,38cyclictest11630-21ssh22:20:280
1599299683,11cyclictest0-21swapper/122:11:591
15989996833,13cyclictest0-21swapper/021:00:190
1599299675,12cyclictest0-21swapper/122:16:541
1599299654,10cyclictest0-21swapper/120:31:571
1598999655,50cyclictest0-21swapper/018:42:180
1598999654,11cyclictest0-21swapper/022:12:060
15993996446,12cyclictest0-21swapper/200:02:072
1599399644,53cyclictest0-21swapper/221:55:252
1599399644,53cyclictest0-21swapper/221:55:252
1598999647,51cyclictest24288-21sendmail_mailtr21:02:110
1598999645,51cyclictest0-21swapper/019:51:570
1598999645,51cyclictest0-21swapper/019:51:570
15989996436,12cyclictest0-21swapper/022:51:500
38092633,53sleep13961-21cat21:21:431
165492632,52sleep00-21swapper/023:15:500
15993996337,13cyclictest0-21swapper/221:46:412
1599299637,13cyclictest0-21swapper/100:01:291
1599299637,13cyclictest0-21swapper/100:01:291
1599299633,53cyclictest0-21swapper/121:27:051
1599299633,12cyclictest0-21swapper/123:37:211
1598999634,51cyclictest0-21swapper/021:42:150
15989996335,13cyclictest0-21swapper/023:56:550
15989996335,13cyclictest0-21swapper/023:56:550
15989996333,13cyclictest0-21swapper/023:52:000
1598999633,53cyclictest0-21swapper/022:01:550
15994996211,44cyclictest0-21swapper/322:11:403
15993996244,13cyclictest0-21swapper/200:01:282
15993996244,13cyclictest0-21swapper/200:01:282
15993996244,12cyclictest0-21swapper/222:07:182
15993996242,14cyclictest0-21swapper/219:17:032
1599399624,52cyclictest0-21swapper/222:01:502
15993996238,11cyclictest0-21swapper/223:27:012
15993996237,12cyclictest0-21swapper/221:27:122
15989996232,14cyclictest0-21swapper/022:41:530
15989996232,13cyclictest0-21swapper/023:21:160
15989996232,13cyclictest0-21swapper/023:21:160
1598999623,50cyclictest0-21swapper/022:36:390
1598999623,14cyclictest8726-21diskmemload21:27:140
219499610,8rtkit-daemon2193-21rtkit-daemon22:46:500
1599499614,50cyclictest0-21swapper/320:55:063
15993996144,12cyclictest0-21swapper/222:46:522
1599399614,51cyclictest0-21swapper/222:56:192
15993996138,11cyclictest0-21swapper/222:32:032
15993996136,12cyclictest0-21swapper/200:07:052
15993996135,13cyclictest0-21swapper/220:48:332
15993996134,13cyclictest0-21swapper/222:11:542
1598999613,41cyclictest0-21swapper/023:02:000
1598999613,13cyclictest0-21swapper/023:31:580
1598999612,9cyclictest25559-21taskset21:52:060
1598999612,9cyclictest25559-21taskset21:52:060
125152614,11sleep00-21swapper/020:46:590
191892604,12sleep10-21swapper/123:18:081
191892604,12sleep10-21swapper/123:18:081
182262603,50sleep10-21swapper/122:29:591
15994996013,38cyclictest0-21swapper/321:56:533
15993996043,12cyclictest0-21swapper/223:09:392
1599399604,50cyclictest0-21swapper/223:12:012
15993996039,12cyclictest0-21swapper/223:32:012
15993996037,7cyclictest27170-21ssh21:07:032
15993996036,11cyclictest0-21swapper/223:19:002
15993996036,11cyclictest0-21swapper/223:19:002
15993996036,11cyclictest0-21swapper/223:01:492
15993996036,11cyclictest0-21swapper/220:52:472
15993996035,9cyclictest1227-21runrttasks23:47:092
15993996035,12cyclictest0-21swapper/219:12:002
1599299605,11cyclictest0-21swapper/121:04:021
1599299604,49cyclictest0-21swapper/120:52:011
1599299604,12cyclictest0-21swapper/123:51:481
15989996033,13cyclictest0-21swapper/021:46:560
15989996033,12cyclictest0-21swapper/021:35:430
15989996032,13cyclictest0-21swapper/023:27:570
15989996031,13cyclictest0-21swapper/021:17:040
15989996031,13cyclictest0-21swapper/000:06:520
15989996031,12cyclictest0-21swapper/023:41:370
3127525910,42sleep10-21swapper/122:48:211
1599399595,39cyclictest0-21swapper/222:42:522
15993995943,11cyclictest0-21swapper/222:16:572
15993995943,11cyclictest0-21swapper/221:38:472
15993995942,12cyclictest0-21swapper/222:27:242
15993995940,14cyclictest0-21swapper/221:23:442
15993995934,12cyclictest0-21swapper/221:19:442
15993995933,13cyclictest0-21swapper/222:36:502
1599299595,47cyclictest0-21swapper/122:32:141
1599299594,48cyclictest0-21swapper/123:11:551
1599299594,48cyclictest0-21swapper/121:52:051
1599299594,48cyclictest0-21swapper/121:52:051
1599299594,48cyclictest0-21swapper/120:18:341
1599299593,51cyclictest0-21swapper/123:45:491
1599299593,50cyclictest0-21swapper/123:33:491
15989995932,13cyclictest0-21swapper/021:22:560
15989995932,12cyclictest0-21swapper/021:37:300
15989995931,13cyclictest0-21swapper/023:47:060
15989995931,13cyclictest0-21swapper/022:40:120
15989995931,13cyclictest0-21swapper/020:12:050
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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