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2026-08-27 - 17:50

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 Thu Aug 27, 2026 00:46:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38820412369332,12sleep110-21swapper/1119:06:223
38820912360320,13sleep10-21swapper/119:07:011
38821212357348,6sleep90-21swapper/919:07:2515
38820542357316,14sleep50-21swapper/519:06:3211
38788292357348,6sleep20-21swapper/219:05:108
38822822354334,13sleep150-21swapper/1519:09:407
38821622353333,13sleep100-21swapper/1019:07:582
38821022353333,13sleep120-21swapper/1219:07:114
38820792352332,13sleep70-21swapper/719:06:5013
38822842351333,12sleep00-21swapper/019:09:410
38822352349329,13sleep60-21swapper/619:08:5812
38788242349328,14sleep140-21swapper/1419:05:056
38820982348327,14sleep80-21swapper/819:07:0814
38820622348328,13sleep130-21swapper/1319:06:405
38820072346327,12sleep40-21swapper/419:05:5910
38822492344324,13sleep30-21swapper/319:09:119
3882788994444,0cyclictest0-21swapper/800:00:1514
3882774993939,0cyclictest0-21swapper/520:41:5211
3882774993836,1cyclictest16173-21kworker/5:1-events00:32:1711
442502360,0sleep10-21swapper/100:25:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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