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2025-11-03 - 11:50

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 Mon Nov 03, 2025 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
342618699296514,2945cyclictest3458627-21kworker/1:1+events21:15:201
342618699295213,2934cyclictest3431171-21kworker/1:2+events19:50:201
342618399277713,2758cyclictest3495403-21kworker/0:2+events22:45:150
342618999274613,2729cyclictest3434757-21kworker/2:0+events19:40:162
342619399262712,2610cyclictest3527629-21kworker/3:0+events00:25:223
342619399259611,2581cyclictest3521318-21kworker/3:2+events00:10:253
342618699258313,2568cyclictest3524482-21kworker/1:1+events00:17:381
342618999257211,2558cyclictest3472972-21kworker/2:2+events21:50:162
342619399255412,2539cyclictest3498989-21kworker/3:0+events23:09:543
34261939925524,2544cyclictest3448838-21kworker/3:0+events20:18:463
342618699254812,2531cyclictest3475993-21kworker/1:1+events22:00:141
342618699254712,2531cyclictest3506774-21kworker/1:1+events23:20:361
342618999253211,2518cyclictest3478038-21kworker/2:1+events21:55:172
342618399252512,2510cyclictest3432807-21kworker/0:2+events19:33:050
342619399251612,2500cyclictest3461918-21kworker/3:1+events21:08:073
342618999250212,2486cyclictest3524661-21kworker/2:1+events00:37:252
34261869924970,2494cyclictest3458627-21kworker/1:1+events21:01:351
342618699249312,2478cyclictest3489067-21kworker/1:1+events22:40:391
342619399249212,2476cyclictest3453751-21kworker/3:2+events20:36:083
342618699248912,2474cyclictest3466787-21kworker/1:2+events21:21:481
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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