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2025-12-22 - 13:21

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

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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  Intel
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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack1slot6s.osadl.org (updated Mon Dec 22, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
68699956,15cyclictest0-21swapper/019:01:420
686999433,10cyclictest8584-21tr19:16:570
68699914,38cyclictest0-21swapper/020:26:530
686999113,35cyclictest0-21swapper/020:12:120
686998722,8cyclictest505-21latency_hist23:31:320
686998636,10cyclictest0-21swapper/021:03:490
686998627,8cyclictest24718-21latency_hist19:51:410
686998532,16cyclictest0-21swapper/023:36:460
248599850,5rtkit-daemon2484-21rtkit-daemon21:16:532
248599850,4rtkit-daemon2484-21rtkit-daemon21:06:542
68699833,39cyclictest0-21swapper/023:41:520
686998328,13cyclictest0-21swapper/019:45:580
68699824,35cyclictest0-21swapper/020:56:580
248599820,5rtkit-daemon2484-21rtkit-daemon20:52:092
686998032,10cyclictest0-21swapper/019:01:540
155692710,6sleep20-21swapper/222:52:062
132782710,2sleep1201ktimersoftd/121:41:511
692996537,20cyclictest31426-21unixbench_singl22:17:092
248599640,5rtkit-daemon16318-21yum-updatesd-he20:41:473
69299624,13cyclictest0-21swapper/222:56:442
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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