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2025-07-01 - 05:33

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #8

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 rackbslot8s (updated Tue Jul 01, 2025 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41384172133119,9sleep30-21swapper/319:09:433
41383792133119,9sleep20-21swapper/219:09:102
41384022128114,9sleep60-21swapper/619:09:296
41381482127113,9sleep50-21swapper/519:05:525
41381242127113,9sleep10-21swapper/119:05:321
41382442125111,9sleep00-21swapper/019:07:150
41383532122108,9sleep40-21swapper/419:08:474
41381502117102,10sleep70-21swapper/719:05:537
41386939910299,3cyclictest573-21snmpd23:57:184
4138693991020,99cyclictest0-21swapper/420:38:084
4138704991010,101cyclictest0-21swapper/721:08:367
41386999910199,2cyclictest4175486-21kworker/6:222:35:056
41386999910199,2cyclictest4175486-21kworker/6:221:45:526
41386999910199,1cyclictest95332-21kworker/6:122:55:046
41386999910198,2cyclictest95332-21kworker/6:123:41:066
413869999101100,1cyclictest95332-21kworker/6:123:45:346
413869999101100,1cyclictest95332-21kworker/6:123:36:346
413869999101100,1cyclictest95332-21kworker/6:123:21:136
413869999101100,1cyclictest95332-21kworker/6:122:51:186
413869999101100,1cyclictest95332-21kworker/6:122:43:066
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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