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2026-04-09 - 13:41

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #f, 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.
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.

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 rackfslot7s.osadl.org (updated Thu Apr 09, 2026 00:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
255609199380318,3777cyclictest2601368-21kworker/2:0+events21:40:012
255608699281414,2797cyclictest2636678-21kworker/0:0+events23:40:140
255608699274712,2731cyclictest2649109-21kworker/0:0+events00:05:170
255609199272613,2708cyclictest2586852-21kworker/2:0+events21:05:102
255609199272613,2708cyclictest2586852-21kworker/2:0+events21:05:102
255609199270013,2683cyclictest2568922-21kworker/2:2+events20:06:072
255609199268713,2670cyclictest2601368-21kworker/2:0+events21:50:112
255609199263913,2624cyclictest2628727-21kworker/2:0+events23:15:352
255609199263712,2621cyclictest2577193-21kworker/2:3+events20:25:182
255609499261813,2602cyclictest2612376-21kworker/3:1+events22:15:143
255609199259811,2583cyclictest2644398-21kworker/2:1+events00:12:532
255609199258612,2570cyclictest2660344-21kworker/2:2+events00:35:122
255609199257912,2563cyclictest2598059-21kworker/2:1+events21:23:222
255609199257310,2559cyclictest2630454-21kworker/2:1+events23:04:142
255609199257112,2556cyclictest2606199-21kworker/2:2+events22:06:262
255609199256912,2553cyclictest2634862-21kworker/2:2+events23:12:342
255609499256711,2553cyclictest2557337-21kworker/3:0+events19:47:053
255609499254911,2534cyclictest2625321-21kworker/3:2+events22:44:273
255609499254312,2527cyclictest2616028-21kworker/3:2+events22:26:113
255609199253712,2521cyclictest2619006-21kworker/2:1+events22:49:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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