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2026-04-14 - 13:59

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 Tue Apr 14, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
74808999362317,3603cyclictest794983-21kworker/0:2+events21:35:110
74808999310312,3087cyclictest769024-21kworker/0:1+events20:20:000
74809799281113,2795cyclictest773012-21kworker/2:1+events20:30:012
74809999279512,2779cyclictest796652-21kworker/3:2+events22:25:173
74809799275113,2734cyclictest767630-21kworker/2:0+events20:15:482
74809299275012,2734cyclictest812846-21kworker/1:0+events22:30:171
74809799272013,2702cyclictest803696-21kworker/2:2+events22:06:572
74809999263813,2622cyclictest854217-21kworker/3:2+events00:38:083
74809999253612,2520cyclictest784124-21kworker/3:2+events21:00:153
74809299253611,2522cyclictest777834-21kworker/1:2+events21:02:101
74809999252812,2512cyclictest817525-21kworker/3:0+events22:45:323
74809799252512,2509cyclictest778452-21kworker/2:2+events20:46:332
7480999925119,2498cyclictest838229-21kworker/3:1+events23:58:273
74809999251112,2495cyclictest747650-21kworker/3:1+events19:24:273
74809299250810,2495cyclictest820519-21kworker/1:2+events22:55:001
74809999250712,2491cyclictest772951-21kworker/3:0+events20:43:303
74809999250410,2491cyclictest772951-21kworker/3:0+events20:36:583
74809999249610,2482cyclictest764296-21kworker/3:0+events20:02:503
74809999249412,2478cyclictest831612-21kworker/3:0+events23:39:063
74809799249312,2478cyclictest841826-21kworker/2:3+events00:24:272
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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