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2025-08-30 - 01:00

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 Aug 29, 2025 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
387963499393917,3916cyclictest3891126-21kworker/2:2+events19:45:122
387962499359918,3575cyclictest3886195-21kworker/0:1+events19:30:010
387962499324114,3222cyclictest3903773-21kworker/0:0+events20:30:210
387962499313814,3120cyclictest3946055-21kworker/0:2+events22:35:010
387963499285014,2831cyclictest3941251-21kworker/2:0+events22:30:212
387963899283713,2817cyclictest3902471-21kworker/3:0+events20:35:133
387963499281910,2805cyclictest3929661-21kworker/2:0+events21:45:192
387963499280113,2784cyclictest3916744-21kworker/2:2+events21:15:182
387963499279213,2775cyclictest3978795-21kworker/2:2+events00:11:322
387963899278814,2770cyclictest3951070-21kworker/3:1+events23:00:003
387962499278210,2767cyclictest3957545-21kworker/0:1+events23:20:000
387963899276613,2747cyclictest3980593-21kworker/3:2+events00:20:143
387963499274911,2733cyclictest3926109-21kworker/2:1+events21:40:192
387963899271411,2698cyclictest3944224-21kworker/3:1+events22:32:163
387963499266513,2650cyclictest3957405-21kworker/2:1+events23:15:022
387963899266112,2645cyclictest3951070-21kworker/3:1+events23:05:013
38796349926159,2602cyclictest3941251-21kworker/2:0+events22:29:142
38796349926159,2602cyclictest3941251-21kworker/2:0+events22:29:132
387963899258010,2566cyclictest3936062-21kworker/3:2+events22:25:003
387963499257612,2562cyclictest3913442-21kworker/2:0+events21:10:232
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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