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2026-09-06 - 07:16

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 Sun Sep 06, 2026 00:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
240552499332615,3307cyclictest2415134-21kworker/0:1+events19:45:010
240553399289114,2872cyclictest2446984-21kworker/3:1+events21:20:023
240553399281213,2796cyclictest2506687-21kworker/3:1+events00:25:133
240553399278613,2769cyclictest2431307-21kworker/3:0+events20:43:213
240553399268813,2671cyclictest2452150-21kworker/3:1+events21:35:143
240552999267813,2661cyclictest2490882-21kworker/2:1+events23:35:192
240552999267711,2662cyclictest2432687-21kworker/2:1+events20:54:502
240552799267313,2657cyclictest2469872-21kworker/1:1+events22:40:131
240552799266013,2643cyclictest2450523-21kworker/1:2+events21:51:291
240552799265213,2635cyclictest2479288-21kworker/1:1+events22:57:551
240553399264613,2628cyclictest2434569-21kworker/3:1+events20:50:143
240552799264613,2629cyclictest2445319-21kworker/1:1+events21:15:461
240552499263513,2618cyclictest2421580-21kworker/0:1+events20:30:000
240552999262111,2606cyclictest2454173-21kworker/2:2+events21:55:172
240553399261611,2601cyclictest2471654-21kworker/3:2+events22:55:123
240552499260312,2587cyclictest2469831-21kworker/0:1+events22:26:510
240552999257812,2562cyclictest2403334-21kworker/2:0+events19:24:002
240553399257312,2557cyclictest2503833-21kworker/3:0+events00:19:593
240552499257312,2558cyclictest2506988-21kworker/0:3+events00:33:260
240552499256912,2553cyclictest2503716-21kworker/0:2+events00:28:570
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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