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2026-06-05 - 21:07

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #4

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 or here to proceed to next system.
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.
Unexpectedly long latencies may be caused by SMIs
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 rack8slot4s.osadl.org (updated Fri Jun 05, 2026 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27263922248176,22sleep60-21swapper/607:09:376
27263922248176,22sleep60-21swapper/607:09:366
27262402234168,20sleep70-21swapper/707:07:297
27262402234168,20sleep70-21swapper/707:07:297
27263342227190,24sleep40-21swapper/407:08:464
27263342227190,24sleep40-21swapper/407:08:464
27262722224190,22sleep10-21swapper/107:07:551
27262722224190,22sleep10-21swapper/107:07:551
27262382222184,24sleep50-21swapper/507:07:265
27262382222184,24sleep50-21swapper/507:07:265
27263132217183,22sleep30-21swapper/307:08:303
27263132217183,22sleep30-21swapper/307:08:293
27263232216176,25sleep20-21swapper/207:08:372
27263232216176,25sleep20-21swapper/207:08:372
27263212211172,25sleep00-21swapper/007:08:350
27263212211172,25sleep00-21swapper/007:08:350
272663699270,27cyclictest0-21swapper/010:40:000
272663699270,27cyclictest0-21swapper/008:10:010
272665799260,25cyclictest2898442-21cron12:00:007
2726651992620,5cyclictest2737896-21ntpq07:25:204
272663699260,21cyclictest2910285-21awk12:20:010
2726653992521,3cyclictest2851259-21basename10:39:595
272665399250,24cyclictest2886678-21sh11:40:015
272665399250,24cyclictest2764474-21ntpq08:10:185
2726651992520,4cyclictest0-21swapper/410:05:124
2726651992519,6cyclictest2827640-21dump-pmu-power09:59:594
2726651992519,6cyclictest0-21swapper/409:20:004
272664799250,25cyclictest2796892-21awk09:05:173
2726636992519,6cyclictest2750930-21turbostat07:50:000
272663699250,3cyclictest2770388-21ntp_offset08:20:180
272663699250,25cyclictest0-21swapper/008:45:130
272665799240,23cyclictest0-21swapper/711:40:117
272665699240,1cyclictest2838204-21ntpq10:15:176
272665699240,1cyclictest2801505-21apt-get09:15:136
272665399242,4cyclictest0-21swapper/512:00:405
272665399242,4cyclictest0-21swapper/510:54:475
272665399242,4cyclictest0-21swapper/510:21:495
272665399242,4cyclictest0-21swapper/509:26:555
272665399242,4cyclictest0-21swapper/509:04:575
272665399242,4cyclictest0-21swapper/508:53:595
272665399242,4cyclictest0-21swapper/508:32:015
2726651992421,3cyclictest0-21swapper/410:20:124
2726651992419,4cyclictest2920943-21ntpq12:35:194
2726651992419,4cyclictest2898472-21munin-run12:00:014
272665199240,23cyclictest0-21swapper/410:55:124
272665199240,23cyclictest0-21swapper/408:15:184
272665199240,0cyclictest0-21swapper/409:45:174
272664799240,3cyclictest2913222-21turbostat12:25:003
272664799240,23cyclictest0-21swapper/308:40:133
272664799240,1cyclictest2873708-21ntp_states11:15:193
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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