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2026-09-20 - 22:32

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 Sep 20, 2026 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21949991024,47cyclictest0-21swapper/310:48:553
361721000,7sleep041ktimersoftd/006:57:360
21948999833,8cyclictest29562-21sort07:42:402
2194999974,50cyclictest0-21swapper/305:46:513
21948999717,12cyclictest0-21swapper/209:07:322
21948999717,12cyclictest0-21swapper/209:07:322
2194999965,47cyclictest0-21swapper/308:58:083
2194899964,84cyclictest0-21swapper/209:52:352
2194999955,49cyclictest21239-21ntp_states09:07:413
2194999955,49cyclictest21239-21ntp_states09:07:413
2194999954,50cyclictest26291-21yum-updatesd-he10:05:073
2194999954,44cyclictest30416-21munin-node09:22:323
21949999514,35cyclictest0-21swapper/307:27:353
21948999326,12cyclictest0-21swapper/209:28:542
2194999917,47cyclictest0-21swapper/308:35:413
2194999915,45cyclictest0-21swapper/308:40:453
2194999914,48cyclictest3921-21df08:42:303
2194999904,44cyclictest0-21swapper/309:38:053
21948999017,12cyclictest0-21swapper/208:42:352
2194999894,47cyclictest0-21swapper/307:35:583
21948998932,8cyclictest7305-21ssh07:57:422
2194899893,34cyclictest0-21swapper/207:27:412
2194899893,25cyclictest0-21swapper/209:47:362
2194899893,25cyclictest0-21swapper/209:47:362
2194899893,24cyclictest0-21swapper/209:34:542
2194899887,23cyclictest0-21swapper/210:49:362
2194899885,23cyclictest0-21swapper/209:17:192
2194899884,33cyclictest16388-21tr08:12:322
2194899883,78cyclictest22539-21grep07:32:372
2194999874,48cyclictest0-21swapper/306:37:483
2194999873,44cyclictest0-21swapper/310:37:393
2194899875,33cyclictest0-21swapper/210:32:262
2194899874,34cyclictest0-21swapper/210:22:372
2194899874,25cyclictest0-21swapper/207:52:412
21948998731,7cyclictest690-21ssh10:16:112
2194899873,25cyclictest0-21swapper/210:27:382
2194899873,25cyclictest0-21swapper/210:27:382
21948998719,12cyclictest0-21swapper/208:25:162
2194899864,22cyclictest0-21swapper/209:46:502
2194899863,26cyclictest0-21swapper/210:04:292
2194999855,45cyclictest0-21swapper/307:56:073
2194899854,36cyclictest0-21swapper/207:47:532
2194899854,36cyclictest0-21swapper/207:47:532
2194899853,33cyclictest0-21swapper/210:17:322
2194899853,26cyclictest0-21swapper/210:42:452
21948998523,12cyclictest0-21swapper/208:42:062
21948998516,11cyclictest0-21swapper/207:02:452
267342840,9sleep02194299cyclictest09:17:270
2194999844,45cyclictest0-21swapper/310:19:583
2194899845,32cyclictest0-21swapper/210:07:282
2194899844,35cyclictest0-21swapper/208:34:412
2194899843,32cyclictest0-21swapper/208:22:162
2194899843,24cyclictest0-21swapper/205:37:482
2194899843,24cyclictest0-21swapper/205:37:482
21948998422,20cyclictest16901-21fschecks_time06:17:392
21948998422,20cyclictest16901-21fschecks_time06:17:392
2194899834,24cyclictest0-21swapper/210:00:272
2194899833,27cyclictest0-21swapper/208:27:282
2194899833,24cyclictest0-21swapper/209:37:322
2194899833,13cyclictest0-21swapper/209:17:072
2194899826,20cyclictest0-21swapper/210:42:012
2194899824,24cyclictest0-21swapper/207:12:342
21948998218,12cyclictest0-21swapper/207:39:432
2194899813,23cyclictest0-21swapper/208:57:272
21948998123,12cyclictest0-21swapper/205:47:392
2194899805,25cyclictest0-21swapper/208:05:152
2194899804,35cyclictest0-21swapper/205:57:342
219499800,33rtkit-daemon0-21swapper/205:27:373
21948997926,10cyclictest15741-21grep07:22:362
2194899784,34cyclictest0-21swapper/209:06:382
2194899784,32cyclictest0-21swapper/209:22:332
2194899784,32cyclictest0-21swapper/208:52:392
2194899784,32cyclictest0-21swapper/206:27:202
2194899784,31cyclictest0-21swapper/206:12:382
2194899783,25cyclictest0-21swapper/205:32:522
21948997824,12cyclictest0-21swapper/208:47:272
2194899774,26cyclictest0-21swapper/206:52:022
2194899753,24cyclictest0-21swapper/206:37:322
2194799705,56cyclictest0-21swapper/107:42:301
219499670,5rtkit-daemon24429-21sed05:27:220
2194799654,54cyclictest0-21swapper/108:47:401
21942996536,10cyclictest1124-21snmpd10:17:350
219499650,5rtkit-daemon2193-21rtkit-daemon08:25:163
2194999646,50cyclictest1227-21runrttasks07:48:463
2194999646,50cyclictest1227-21runrttasks07:48:463
21949996421,25cyclictest10725-21fschecks_count07:12:363
21942996437,9cyclictest23854-21rm09:12:310
219499640,7rtkit-daemon0-21swapper/105:22:452
219499640,6rtkit-daemon0-21swapper/108:23:230
2194999636,49cyclictest1227-21runrttasks08:18:103
2194999624,51cyclictest0-21swapper/309:15:333
21942996211,21cyclictest0-21swapper/008:59:330
81072614,12sleep10-21swapper/107:07:341
81072614,12sleep10-21swapper/107:07:341
2194999615,49cyclictest0-21swapper/310:27:383
2194999615,49cyclictest0-21swapper/310:27:383
2194999615,49cyclictest0-21swapper/308:47:393
2194999615,48cyclictest13766-21iostat_ios08:07:373
2194799615,49cyclictest15505-21wc10:37:311
21947996124,21cyclictest2267-21gltestperf10:17:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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