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2025-06-24 - 18:47

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #5

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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  Phytec
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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 50 highest latencies:
System rackbslot5s.osadl.org (updated Tue Jun 24, 2025 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3583595997534,10cyclictest311ktimers/207:15:162
3583586997228,6cyclictest0-21swapper/012:30:120
3583599996254,5cyclictest215-21dbus-daemon08:50:113
3583591995438,6cyclictest3680203-21kworker/u8:2+events_unbound11:55:501
3583599995140,7cyclictest3690956-21sendmail12:20:003
3583586995023,5cyclictest0-21swapper/007:45:000
3583586994941,5cyclictest3587538-21munin-run07:20:010
3583586994837,7cyclictest3647861-21kworker/u8:0+events_unbound10:35:310
3583586994822,3cyclictest0-21swapper/009:40:250
3583595994733,9cyclictest311ktimers/208:00:172
3583595994733,9cyclictest311ktimers/208:00:172
3583595994637,6cyclictest3642975-21munin-plugin-st10:00:002
3583586994639,4cyclictest3602898-21idleruntime-cro08:05:000
3583586994639,4cyclictest3602898-21idleruntime-cro08:05:000
3583586994636,6cyclictest3632127-21unixbench_singl09:25:270
3583591994538,4cyclictest3613111-21unixbench_multi08:30:311
3583595994332,7cyclictest3638901-21unixbench_multi09:45:282
3583591994334,6cyclictest3587085-21unixbench_multi07:15:291
3583595994228,10cyclictest311ktimers/210:25:132
3583586994222,17cyclictest13650irq/42-30be0000.ethernet09:10:140
3583591994134,4cyclictest3608432-21sendmail08:20:001
3583591994131,6cyclictest3680103-21unixbench_singl11:45:291
3583591993932,5cyclictest3647861-21kworker/u8:0+events_unbound10:20:281
3583586993932,3cyclictest0-21swapper/012:20:000
3583586993827,6cyclictest0-21swapper/011:35:280
3583599993729,4cyclictest0-21swapper/310:15:273
3583599993729,4cyclictest0-21swapper/309:45:183
3583599993728,5cyclictest0-21swapper/309:40:233
3583595993727,6cyclictest3644244-21grep10:00:282
3583591993724,8cyclictest3646384-21sh10:10:001
3583586993726,8cyclictest3687521-21cron12:09:590
3583599993629,4cyclictest0-21swapper/310:45:013
3583599993629,4cyclictest0-21swapper/310:45:003
3583599993628,4cyclictest0-21swapper/309:00:193
3583599993626,6cyclictest0-21swapper/308:25:013
3583591993629,5cyclictest3696008-21kworker/u8:3+events_unbound12:35:551
3583586993628,4cyclictest0-21swapper/008:10:010
3583586993628,4cyclictest0-21swapper/008:10:010
3583586993626,5cyclictest0-21swapper/007:25:300
3583586993625,6cyclictest3638898-21grep09:45:280
3583586993625,6cyclictest0-21swapper/011:10:270
3583599993527,4cyclictest0-21swapper/312:35:563
3583599993527,4cyclictest0-21swapper/310:50:303
3583595993529,3cyclictest3589253-21kthreadd07:25:002
3583595993526,5cyclictest299-21systemd-logind11:30:442
3583595993526,5cyclictest299-21systemd-logind11:30:432
3583595993524,7cyclictest3590983-21latency_hist07:30:002
3583591993529,4cyclictest3592890-21kworker/u8:0+events_unbound07:40:041
3583599993426,4cyclictest0-21swapper/308:40:263
3583595993426,5cyclictest3622094-21kworker/u8:0+events_unbound09:15:162
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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