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2026-08-03 - 06:26

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 Mon Aug 03, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39799592120106,9sleep40-21swapper/419:05:204
39807452119104,10sleep70-21swapper/719:07:247
39809152115100,10sleep20-21swapper/219:09:502
39807482114100,9sleep10-21swapper/119:07:251
3980790211399,9sleep50-21swapper/519:08:025
3980589211399,9sleep00-21swapper/019:05:230
3980871211298,9sleep30-21swapper/319:09:113
3978812211197,9sleep60-21swapper/619:05:066
39811679910299,3cyclictest553-21snmpd22:56:593
39811639910299,3cyclictest553-21snmpd22:50:192
3981163991020,102cyclictest0-21swapper/223:38:492
3981163991020,102cyclictest0-21swapper/223:38:482
3981163991020,0cyclictest0-21swapper/222:45:162
3981163991020,0cyclictest0-21swapper/222:18:002
3981163991020,0cyclictest0-21swapper/221:33:352
39811599910299,3cyclictest553-21snmpd21:27:531
398115999102100,2cyclictest553-21snmpd20:23:171
3981155991020,100cyclictest0-21swapper/021:46:530
3981182991010,100cyclictest0-21swapper/719:27:487
3981178991010,100cyclictest0-21swapper/621:45:456
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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