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2026-04-13 - 17:14

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

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 rackcslot7s.osadl.org (updated Mon Apr 13, 2026 12:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
205927321330,3sleep00-21swapper/007:55:160
2040768210848,50sleep20-21swapper/207:05:102
204200827636,13sleep10-21swapper/107:07:191
204192527555,13sleep00-21swapper/007:06:130
139099740,61rtkit-daemon0-21swapper/307:06:123
21511412590,11sleep234-21ksoftirqd/212:15:162
21331432440,2sleep00-21swapper/011:25:130
21533582430,3sleep32153356-21python312:20:223
20610862420,4sleep2331rcuc/208:00:172
2042372994012,5cyclictest436-20systemd-journal08:50:313
2042358993633,2cyclictest161rcuc/007:35:120
2042372993113,3cyclictest2156712-21ntp_states12:30:193
2042372993010,4cyclictest2086769-21find09:15:113
204237299300,27cyclictest2119512-21ntp_states10:45:203
204237299290,6cyclictest2112997-21seq10:29:393
204235899289,10cyclictest13-21ksoftirqd/009:20:010
2042358992810,9cyclictest13-21ksoftirqd/011:05:000
204235899279,7cyclictest13-21ksoftirqd/008:05:000
204235899278,10cyclictest13-21ksoftirqd/012:10:010
204235899278,10cyclictest13-21ksoftirqd/010:40:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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