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2026-05-05 - 22:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #3

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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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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack0slot3s.osadl.org (updated Tue May 05, 2026 00:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29668092278213,56sleep20-21swapper/219:07:582
29668092278213,56sleep20-21swapper/219:07:582
29666582262218,16sleep50-21swapper/519:06:015
29666582262218,16sleep50-21swapper/519:06:015
29668382261221,16sleep70-21swapper/719:08:197
29668382261221,16sleep70-21swapper/719:08:197
29667712259214,15sleep10-21swapper/119:07:241
29667712259214,15sleep10-21swapper/119:07:241
29667202256215,17sleep30-21swapper/319:06:463
29667202256215,17sleep30-21swapper/319:06:463
29668942255216,16sleep00-21swapper/019:09:080
29668942255216,16sleep00-21swapper/019:09:080
29668222255215,17sleep60-21swapper/619:08:106
29668222255215,17sleep60-21swapper/619:08:106
29667502247223,16sleep40-21swapper/419:07:124
29667502247223,16sleep40-21swapper/419:07:124
2967265993129,2cyclictest1391-21snmpd20:50:202
2967287993029,1cyclictest0-21swapper/722:46:477
2967274993024,4cyclictest2821732-21kworker/4:2-events22:08:044
2967274993024,4cyclictest2821732-21kworker/4:2-events20:17:074
2967274993024,4cyclictest2821732-21kworker/4:2-events20:12:514
2967274993023,4cyclictest2821732-21kworker/4:2+events_freezable19:10:544
2967274992923,4cyclictest59-21ksoftirqd/421:50:594
2967274992923,4cyclictest2821732-21kworker/4:2-mm_percpu_wq21:47:194
2967274992923,4cyclictest2821732-21kworker/4:2-mm_percpu_wq20:26:014
2967274992923,4cyclictest2821732-21kworker/4:2+events22:39:024
2967274992923,4cyclictest2821732-21kworker/4:2-events19:24:304
2967274992921,2cyclictest0-21swapper/419:41:584
2967274992920,7cyclictest2821732-21kworker/4:2+mm_percpu_wq22:55:404
296727499291,26cyclictest2821732-21kworker/4:2+events_freezable22:15:064
296727499290,27cyclictest2821732-21kworker/4:2+mm_percpu_wq23:55:164
296727499290,27cyclictest2821732-21kworker/4:2+mm_percpu_wq23:55:164
2967270992928,1cyclictest0-21swapper/319:25:173
2967274992826,2cyclictest0-21swapper/420:42:134
2967274992824,2cyclictest2821732-21kworker/4:2+events_freezable21:29:334
2967274992824,2cyclictest2821732-21kworker/4:2+events_freezable21:29:334
2967274992824,2cyclictest2821732-21kworker/4:2+events21:44:194
2967274992824,2cyclictest2821732-21kworker/4:2-events19:19:324
2967274992824,2cyclictest0-21swapper/423:02:534
2967274992823,5cyclictest2821732-21kworker/4:2+mm_percpu_wq21:00:334
2967274992823,4cyclictest0-21swapper/423:44:014
2967274992823,4cyclictest0-21swapper/422:24:104
2967274992823,4cyclictest0-21swapper/421:35:494
2967274992822,4cyclictest581ktimers/420:48:254
2967274992822,4cyclictest2821732-21kworker/4:2+events_freezable19:38:374
2967274992822,4cyclictest2821732-21kworker/4:2-events20:56:574
2967274992822,4cyclictest2821732-21kworker/4:2-events00:16:044
2967274992822,4cyclictest0-21swapper/421:56:094
2967274992821,5cyclictest2821732-21kworker/4:2+events23:38:514
296727499281,25cyclictest581ktimers/420:22:054
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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