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2026-09-23 - 22:19

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
Click here to display the system's profile data or here to proceed to next system.
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 50 highest latencies:
System rack1slot6s.osadl.org (updated Wed Sep 23, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28849999711,21cyclictest0-21swapper/307:35:003
219499960,6rtkit-daemon0-21swapper/005:23:380
219499900,6rtkit-daemon0-21swapper/005:24:380
2884999874,10cyclictest14168-21munin-node09:34:583
28849998731,48cyclictest1227-21runrttasks08:19:473
2884999864,28cyclictest0-21swapper/310:37:203
2884999864,28cyclictest0-21swapper/310:09:223
2884999854,73cyclictest0-21swapper/308:10:413
2884999854,36cyclictest0-21swapper/308:49:253
28849998530,49cyclictest9171-21switchtime09:24:573
28849998530,48cyclictest28744-21fschecks_time10:44:383
2884999853,27cyclictest21511-21python08:54:563
28849998525,10cyclictest31896-21grep06:30:023
28849998521,14cyclictest0-21swapper/306:39:563
28849998514,12cyclictest0-21swapper/305:39:323
2884999844,33cyclictest0-21swapper/305:44:563
2884999844,15cyclictest0-21swapper/310:02:063
2884999843,74cyclictest13575-21taskset10:20:373
28849998429,48cyclictest29019-21needreboot06:24:563
28849998429,47cyclictest24480-21df_abs09:49:383
28849998426,10cyclictest4688-21cut09:19:423
2884999834,25cyclictest0-21swapper/307:04:443
2884999834,13cyclictest0-21swapper/307:26:413
2884999834,12cyclictest0-21swapper/307:47:103
2884999833,30cyclictest0-21swapper/308:14:373
28849998310,9cyclictest107550irq/46-eth010:24:463
2884999824,30cyclictest0-21swapper/306:13:193
2884999824,27cyclictest0-21swapper/310:29:423
2884999824,12cyclictest0-21swapper/309:01:403
28849998238,38cyclictest1679-21switchtime08:24:573
2884999823,34cyclictest0-21swapper/309:18:043
2884999823,34cyclictest0-21swapper/309:18:043
2884999823,29cyclictest27660-21cpuspeed_turbos09:54:363
2884999823,29cyclictest27660-21cpuspeed_turbos09:54:363
2884999823,23cyclictest0-21swapper/308:33:133
28849998229,9cyclictest8605-21cpuspeed_turbos10:14:343
2884999814,26cyclictest0-21swapper/305:24:343
2884999814,21cyclictest0-21swapper/309:47:343
2884999814,16cyclictest0-21swapper/307:52:413
2884999814,12cyclictest0-21swapper/308:41:373
2884999813,26cyclictest0-21swapper/306:44:553
2884999813,24cyclictest0-21swapper/310:13:343
2884999813,21cyclictest4029-21kworker/3:006:19:443
2884999807,12cyclictest0-21swapper/308:07:423
2884999804,34cyclictest0-21swapper/307:59:433
2884999804,26cyclictest0-21swapper/306:00:183
2884999804,22cyclictest0-21swapper/308:53:443
2884999804,12cyclictest0-21swapper/310:41:563
2884999804,12cyclictest0-21swapper/310:41:563
2884999803,13cyclictest0-21swapper/307:23:473
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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