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2025-11-26 - 03:08

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 50 highest latencies:
System rack1slot6s.osadl.org (updated Wed Nov 26, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
243799960,6rtkit-daemon0-21swapper/222:50:022
2413699914,12cyclictest0-21swapper/222:25:462
2413699914,12cyclictest0-21swapper/220:50:272
2413699914,10cyclictest30352-21open_inodes21:20:572
2413699914,10cyclictest30352-21open_inodes21:20:572
2413699904,12cyclictest0-21swapper/223:10:452
24136999016,49cyclictest0-21swapper/200:20:392
2413699894,15cyclictest0-21swapper/218:55:312
24136998919,48cyclictest0-21swapper/219:45:522
2413699884,60cyclictest0-21swapper/220:32:522
24136998820,45cyclictest0-21swapper/219:41:022
24136998811,9cyclictest1618-21nscd21:35:252
2413699875,58cyclictest0-21swapper/223:43:212
2413699874,62cyclictest0-21swapper/222:50:402
2413699874,59cyclictest0-21swapper/220:37:532
2413699874,59cyclictest0-21swapper/220:37:532
2413699873,13cyclictest0-21swapper/223:05:212
2413699864,13cyclictest0-21swapper/222:15:532
2413699864,12cyclictest0-21swapper/223:50:522
2413699863,12cyclictest0-21swapper/219:51:002
2413599864,74cyclictest0-21swapper/123:20:451
2413699854,13cyclictest0-21swapper/200:10:512
2413699854,13cyclictest0-21swapper/200:10:512
2413699854,12cyclictest0-21swapper/220:15:532
2413699854,12cyclictest0-21swapper/219:35:302
2413599854,73cyclictest0-21swapper/121:50:241
2413699844,65cyclictest0-21swapper/220:00:532
2413699844,64cyclictest0-21swapper/219:35:452
2413699844,14cyclictest0-21swapper/222:00:522
2413699844,14cyclictest0-21swapper/222:00:522
2413699837,10cyclictest0-21swapper/221:25:582
2413699834,63cyclictest0-21swapper/220:12:492
2413699834,60cyclictest30382-21runrttasks19:05:572
2413699834,13cyclictest0-21swapper/221:51:012
2413699834,12cyclictest0-21swapper/221:35:482
2413699834,12cyclictest0-21swapper/200:16:102
24136998314,51cyclictest0-21swapper/220:23:002
2413599834,72cyclictest0-21swapper/123:10:541
2413599834,72cyclictest0-21swapper/120:40:401
2413599833,72cyclictest0-21swapper/122:25:381
2413699824,63cyclictest0-21swapper/223:18:532
2413699824,61cyclictest0-21swapper/221:00:512
2413699824,58cyclictest0-21swapper/221:10:442
2413699824,11cyclictest8643-21munin-node00:00:432
2413699824,11cyclictest0-21swapper/221:06:582
2413699823,12cyclictest0-21swapper/223:28:182
2413699823,12cyclictest0-21swapper/223:28:182
2413699823,12cyclictest0-21swapper/219:02:262
24136998212,52cyclictest0-21swapper/223:45:542
2413599825,70cyclictest0-21swapper/100:03:241
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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