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2026-04-19 - 15:21

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 100 highest latencies:
System rack8slot4s.osadl.org (updated Sun Apr 19, 2026 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2898842231166,21sleep10-21swapper/107:05:011
2925332224169,17sleep60-21swapper/607:07:556
2925582217184,21sleep20-21swapper/207:08:162
2924112217182,23sleep30-21swapper/307:06:083
2924132216177,24sleep50-21swapper/507:06:095
2925962214181,21sleep40-21swapper/407:08:504
2923862210177,21sleep70-21swapper/707:05:477
2926012207173,21sleep00-21swapper/007:08:530
29290399270,25cyclictest0-21swapper/109:30:131
292903992624,1cyclictest0-21swapper/107:15:021
292924992523,1cyclictest454881-21apt11:50:007
29292499250,21cyclictest406732-21apt-get10:25:147
29292299250,24cyclictest295644-21apt-get07:15:016
29290999250,24cyclictest477990-21cron12:30:002
292924992421,2cyclictest0-21swapper/707:30:117
292924992420,3cyclictest0-21swapper/707:15:027
29292299240,23cyclictest372167-21apt-get09:25:126
29291999240,23cyclictest380329-21dump-pmu-power09:40:015
292913992423,1cyclictest314757-21apt-get07:45:123
292913992423,1cyclictest0-21swapper/308:25:133
292913992423,1cyclictest0-21swapper/308:25:123
292913992422,1cyclictest0-21swapper/309:10:003
292903992423,0cyclictest0-21swapper/109:25:131
29290399240,3cyclictest414855-21sh10:39:591
29290399240,23cyclictest420591-21munin-run10:50:001
292899992421,2cyclictest409553-21/usr/sbin/munin10:30:140
292924992323,0cyclictest0-21swapper/708:15:127
29292299230,22cyclictest426317-21idleruntime-cro11:00:006
292919992322,1cyclictest435295-21apt-get11:15:125
29291999230,23cyclictest480879-21awk12:35:005
292917992323,0cyclictest0-21swapper/408:10:114
29291799230,22cyclictest299930-21apt-get07:20:104
29291799230,22cyclictest0-21swapper/407:40:114
292913992322,1cyclictest0-21swapper/309:05:003
29291399230,22cyclictest0-21swapper/307:50:123
29291399230,1cyclictest423858-21apt-get10:55:103
29290999230,22cyclictest386461-21apt-get09:50:122
29290999230,22cyclictest296101-21cat07:15:012
29290999230,22cyclictest0-21swapper/212:35:142
29290999230,22cyclictest0-21swapper/210:15:132
292903992321,1cyclictest0-21swapper/110:00:101
29290399230,22cyclictest0-21swapper/112:20:111
29290399230,1cyclictest0-21swapper/111:59:591
292899992322,1cyclictest406041-21apt-get10:24:590
29289999230,22cyclictest346454-21apt-get08:40:100
29289999230,22cyclictest0-21swapper/007:50:130
292924992221,1cyclictest0-21swapper/710:55:117
292924992220,1cyclictest432442-21apt-get11:10:117
292924992220,1cyclictest395038-21apt-get10:05:127
292924992218,1cyclictest0-21swapper/708:05:137
29292499220,21cyclictest0-21swapper/711:05:117
29292499220,21cyclictest0-21swapper/708:50:127
29292499220,1cyclictest0-21swapper/710:24:597
29292499220,19cyclictest314757-21apt-get07:45:137
29292499220,0cyclictest0-21swapper/707:40:007
292922992222,0cyclictest0-21swapper/610:00:106
292922992221,1cyclictest357483-21grep09:00:016
292922992221,1cyclictest331885-21apt-get08:15:126
292922992220,1cyclictest0-21swapper/612:30:126
29292299220,22cyclictest311209-21munin-run07:40:006
29292299220,21cyclictest418158-21apt-get10:45:126
29292299220,21cyclictest0-21swapper/610:10:116
29292299220,21cyclictest0-21swapper/609:55:146
29292299220,0cyclictest0-21swapper/611:55:136
29292299220,0cyclictest0-21swapper/611:05:126
29292299220,0cyclictest0-21swapper/608:35:136
292919992221,1cyclictest443881-21apt-get11:30:145
29291999220,22cyclictest0-21swapper/512:30:015
29291999220,21cyclictest392183-21apt-get10:00:095
29291999220,21cyclictest0-21swapper/509:45:145
29291999220,0cyclictest0-21swapper/507:40:125
292917992220,1cyclictest391752-21cut10:00:004
292917992220,1cyclictest368867-21apt09:20:014
292917992220,1cyclictest0-21swapper/408:20:004
292917992219,2cyclictest0-21swapper/407:50:124
29291799220,21cyclictest0-21swapper/411:50:124
29291799220,1cyclictest0-21swapper/409:15:014
29291799220,1cyclictest0-21swapper/408:30:004
29291799220,1cyclictest0-21swapper/408:30:004
292913992220,1cyclictest412018-21munin-run10:34:593
292913992220,1cyclictest346025-21dump-pmu-power08:40:003
29291399220,21cyclictest429583-21apt-get11:05:133
29291399220,21cyclictest426733-21apt-get11:00:113
29291399220,21cyclictest0-21swapper/312:10:123
29291399220,21cyclictest0-21swapper/312:05:123
29291399220,21cyclictest0-21swapper/310:40:123
29291399220,21cyclictest0-21swapper/308:00:123
29291399220,1cyclictest0-21swapper/312:20:003
29291399220,0cyclictest0-21swapper/309:15:123
292909992221,1cyclictest331885-21apt-get08:15:112
292909992221,1cyclictest0-21swapper/210:40:112
292909992220,1cyclictest305896-21apt-get07:30:112
292909992220,1cyclictest0-21swapper/211:40:122
29290999220,21cyclictest0-21swapper/212:20:112
29290999220,21cyclictest0-21swapper/211:55:112
29290999220,21cyclictest0-21swapper/208:20:122
29290999220,21cyclictest0-21swapper/208:20:122
29290999220,21cyclictest0-21swapper/208:15:012
29290999220,21cyclictest0-21swapper/207:35:122
292903992221,1cyclictest464145-21apt-get12:05:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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