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2025-02-07 - 09:25

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 20 highest latencies:
System rack0slot4s.osadl.org (updated Fri Feb 07, 2025 00:46:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17581782387365,14sleep120-21swapper/1219:06:064
17582402358349,6sleep90-21swapper/919:06:5315
17583712347326,14sleep50-21swapper/519:08:2511
17582492346324,15sleep150-21swapper/1519:06:587
17581462346324,15sleep80-21swapper/819:05:4614
17582942345323,14sleep140-21swapper/1419:07:306
17582002345323,14sleep130-21swapper/1319:06:255
17583172344324,13sleep10-21swapper/119:07:481
17581482344322,15sleep100-21swapper/1019:05:482
17581392344323,14sleep20-21swapper/219:05:408
17582282343323,13sleep30-21swapper/319:06:469
17582242343321,15sleep00-21swapper/019:06:440
17584882342321,14sleep70-21swapper/719:09:4713
17584462342321,14sleep110-21swapper/1119:09:193
17582312341319,15sleep60-21swapper/619:06:4912
17583022336312,15sleep40-21swapper/419:07:3610
1758948995753,0cyclictest0-21swapper/322:55:459
1758973995049,0cyclictest0-21swapper/1119:45:163
1758948995045,5cyclictest1859843-21kworker/u32:3+events_unbound20:36:089
1758954994644,2cyclictest2107149-21kworker/u32:2+flush-259:023:38:3811
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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