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2026-07-30 - 17:25

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 Jul 30, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
215599972,54cyclictest0-21swapper/107:16:391
215799944,12cyclictest0-21swapper/310:34:493
215799934,65cyclictest3297-21telnet10:01:163
236572910,5sleep334-21rcuc/309:41:303
215799913,63cyclictest14281-21memory10:16:293
215799913,62cyclictest0-21swapper/306:41:263
215799913,62cyclictest0-21swapper/306:41:263
2157999118,50cyclictest0-21swapper/310:09:213
215799904,64cyclictest0-21swapper/308:11:233
215799904,12cyclictest0-21swapper/311:10:533
215799904,12cyclictest0-21swapper/310:41:173
215799903,9cyclictest6753-21python08:26:403
215799894,62cyclictest0-21swapper/308:52:513
215799894,60cyclictest0-21swapper/306:16:353
215799894,58cyclictest0-21swapper/306:46:463
215799893,62cyclictest18789-21chrt10:23:393
215799893,62cyclictest0-21swapper/309:05:413
2155998925,30cyclictest0-21swapper/109:21:101
215799884,62cyclictest0-21swapper/310:53:043
215799884,62cyclictest0-21swapper/310:53:043
215799884,61cyclictest0-21swapper/311:03:443
215799884,61cyclictest0-21swapper/308:48:383
215799883,13cyclictest0-21swapper/307:19:233
2157998823,43cyclictest0-21swapper/308:23:203
2157998814,54cyclictest0-21swapper/308:56:293
215799879,56cyclictest0-21swapper/310:27:553
215799877,58cyclictest0-21swapper/309:28:383
215799877,58cyclictest0-21swapper/309:28:383
215799875,13cyclictest0-21swapper/310:47:303
215799874,13cyclictest0-21swapper/311:26:223
215799874,13cyclictest0-21swapper/309:19:583
215799874,12cyclictest0-21swapper/309:59:003
215799874,11cyclictest0-21swapper/311:16:383
215799873,62cyclictest0-21swapper/309:50:103
295012860,7sleep10-21swapper/109:51:241
215799865,12cyclictest0-21swapper/309:08:133
215799864,9cyclictest7729-21df_inode10:56:203
215799864,69cyclictest0-21swapper/309:34:143
215799864,69cyclictest0-21swapper/309:34:143
215799864,12cyclictest0-21swapper/310:12:353
215799864,12cyclictest0-21swapper/310:12:353
215799864,12cyclictest0-21swapper/306:21:273
215799864,11cyclictest0-21swapper/311:23:313
2157998610,54cyclictest0-21swapper/308:31:543
215799854,58cyclictest0-21swapper/309:21:503
215799854,12cyclictest0-21swapper/309:39:443
215799853,58cyclictest0-21swapper/311:31:143
215799853,58cyclictest0-21swapper/311:31:143
2157998520,40cyclictest0-21swapper/308:17:283
2157998519,48cyclictest1227-21runrttasks09:53:523
215799844,63cyclictest0-21swapper/308:36:213
215799844,63cyclictest0-21swapper/307:01:283
215799844,59cyclictest0-21swapper/308:44:423
215799844,57cyclictest17612-21diskstats11:11:203
215799843,13cyclictest0-21swapper/311:39:523
215799835,11cyclictest0-21swapper/308:01:373
2157998316,48cyclictest11964-21munin-node06:31:453
2157998311,51cyclictest28080-21awk10:36:373
215799825,12cyclictest0-21swapper/307:31:513
215799824,12cyclictest0-21swapper/309:11:183
215799823,10cyclictest0-21swapper/307:41:443
215799814,11cyclictest0-21swapper/306:58:273
215799804,52cyclictest0-21swapper/307:55:573
215799804,12cyclictest0-21swapper/307:39:133
215799794,60cyclictest0-21swapper/307:21:273
215799794,60cyclictest0-21swapper/307:21:273
215799794,53cyclictest20279-21munin-node07:56:323
215799794,12cyclictest0-21swapper/306:29:543
215799794,12cyclictest0-21swapper/306:13:593
215799784,15cyclictest0-21swapper/306:56:093
215799775,12cyclictest0-21swapper/307:47:213
215799774,56cyclictest0-21swapper/307:10:523
215799773,9cyclictest27219-21crond08:11:103
215799773,9cyclictest27219-21crond08:11:103
2157997711,9cyclictest31925-21gltestperf07:11:323
215799764,54cyclictest0-21swapper/307:26:593
215799723,13cyclictest0-21swapper/306:36:383
252932660,4sleep225412-21unixbench_singl11:21:362
215799664,13cyclictest0-21swapper/306:11:163
2155996551,9cyclictest16950-21munin-node09:31:301
2155996551,9cyclictest16950-21munin-node09:31:301
215599654,52cyclictest24301-21yum09:41:411
219499630,5rtkit-daemon2193-21rtkit-daemon06:11:260
215699634,50cyclictest0-21swapper/211:01:242
215699634,12cyclictest0-21swapper/208:30:582
2155996348,10cyclictest0-21swapper/108:36:371
215599633,51cyclictest6159-21cut09:16:191
215199633,53cyclictest0-21swapper/010:11:320
215199633,53cyclictest0-21swapper/010:11:320
219499620,5rtkit-daemon1227-21runrttasks07:57:452
2155996223,32cyclictest17089-21unixbench_singl08:41:431
2151996246,11cyclictest0-21swapper/011:11:360
215199623,52cyclictest0-21swapper/008:41:240
45622606,46sleep10-21swapper/106:16:151
215699606,44cyclictest0-21swapper/207:52:062
215699604,14cyclictest0-21swapper/209:41:222
215699603,12cyclictest0-21swapper/206:51:302
2156996025,12cyclictest6305-21crond10:06:052
2156996018,10cyclictest24215-21sh08:53:402
2151996044,11cyclictest0-21swapper/010:26:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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