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2026-07-10 - 15:56

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 Fri Jul 10, 2026 00:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
11784099307815,3057cyclictest122743-21kworker/3:1+events19:25:133
1178349929846,2974cyclictest156585-21kworker/1:0+events21:20:221
11783499289613,2881cyclictest168171-21kworker/1:1+events21:55:211
11784099287415,2856cyclictest137386-21kworker/3:2+events20:14:493
1178319928100,2806cyclictest135784-21kworker/0:1+events20:49:050
11784099279913,2782cyclictest197266-21kworker/3:1+events23:15:563
11783199279913,2782cyclictest132495-21kworker/0:2+events20:01:030
11783199279813,2781cyclictest181156-21kworker/0:2+events22:40:110
11783199279413,2777cyclictest211572-21kworker/0:0+events00:01:090
11783199279413,2777cyclictest171153-21kworker/0:0+events22:14:060
11783199277913,2762cyclictest154757-21kworker/0:1+events21:07:060
11783199277313,2756cyclictest171153-21kworker/0:0+events21:55:440
11783199276813,2751cyclictest171153-21kworker/0:0+events22:24:160
11783199276512,2749cyclictest198695-21kworker/0:2+events23:37:580
11783499275914,2741cyclictest210148-21kworker/1:0+events23:58:281
11784099275613,2738cyclictest150155-21kworker/3:1+events21:00:003
1178319927469,2733cyclictest135784-21kworker/0:1+events20:23:130
1178319927469,2733cyclictest135784-21kworker/0:1+events20:23:130
11783699273715,2718cyclictest205154-21kworker/2:0+events23:40:142
11783199273713,2720cyclictest171153-21kworker/0:0+events22:01:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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