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2025-12-31 - 03:32

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 Wed Dec 31, 2025 00:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
37445162243181,20sleep60-21swapper/619:06:316
37447292225167,20sleep30-21swapper/319:09:333
37445902224161,20sleep40-21swapper/419:07:344
37447282217184,22sleep20-21swapper/219:09:322
37445352215187,18sleep50-21swapper/519:06:475
37446502210176,22sleep10-21swapper/119:08:261
37445552210176,21sleep70-21swapper/719:07:047
37445662207173,23sleep00-21swapper/019:07:130
374499099320,23cyclictest3863527-21idleruntime-cro22:35:012
374499099290,2cyclictest363-21systemd-journal23:20:002
374499099270,22cyclictest3774171-21perf20:00:002
374498699260,13cyclictest0-21swapper/100:20:151
374498499260,25cyclictest3872380-21perf22:50:000
3744995992523,1cyclictest3929533-21sh00:29:594
374499099250,24cyclictest0-21swapper/223:45:132
374499099250,24cyclictest0-21swapper/220:50:132
374498699250,24cyclictest0-21swapper/122:00:131
374499599240,23cyclictest3912357-21turbostat.cron23:59:594
3744990992422,2cyclictest0-21swapper/222:40:132
3744990992420,4cyclictest0-21swapper/223:25:132
374498699240,23cyclictest3867091-21apt-get22:40:121
3744984992422,1cyclictest3912373-21perf23:59:590
3744984992421,2cyclictest3791598-21basename20:30:000
374498499240,3cyclictest3751310-21idleruntime-cro19:20:000
374498499240,23cyclictest3809422-21apt-get21:00:120
3745000992321,1cyclictest3777454-21apt-get20:05:125
374500099230,22cyclictest0-21swapper/522:05:005
374500099230,22cyclictest0-21swapper/521:45:145
374500099230,22cyclictest0-21swapper/500:30:155
3744995992321,1cyclictest0-21swapper/400:30:014
374499599230,22cyclictest0-21swapper/423:50:124
374499599230,22cyclictest0-21swapper/421:10:134
374499399230,22cyclictest3837981-21apt-get21:50:123
374499399230,22cyclictest0-21swapper/300:30:003
374499399230,1cyclictest3806545-21apt-get20:55:153
3744990992320,2cyclictest363-21systemd-journal00:30:012
374499099230,22cyclictest3760305-21apt-get19:35:122
374499099230,22cyclictest0-21swapper/223:10:002
3744986992323,0cyclictest0-21swapper/120:05:121
374498699230,22cyclictest3872794-21apt-get22:50:131
374498699230,22cyclictest3831852-21systemctl21:40:001
374498699230,22cyclictest3768879-21apt-get19:50:131
374498699230,22cyclictest0-21swapper/123:39:591
374498699230,1cyclictest3895231-21munin-run23:29:591
3744984992321,1cyclictest3904230-21apt-get23:45:130
3744984992321,1cyclictest0-21swapper/000:14:590
374498499230,22cyclictest3926692-21munin-run00:24:590
3745005992222,0cyclictest0-21swapper/723:10:127
374500599220,22cyclictest0-21swapper/720:50:007
374500599220,21cyclictest0-21swapper/722:45:137
374500599220,21cyclictest0-21swapper/720:40:147
374500599220,21cyclictest0-21swapper/719:10:127
374500599220,21cyclictest0-21swapper/700:30:167
374500599220,21cyclictest0-21swapper/700:05:137
374500599220,21cyclictest0-21swapper/700:00:157
3745001992219,2cyclictest3768884-21apt-get19:50:136
374500199220,22cyclictest0-21swapper/623:54:596
374500199220,22cyclictest0-21swapper/621:45:146
374500199220,21cyclictest3912830-21apt-get00:00:156
374500199220,21cyclictest0-21swapper/623:40:136
374500199220,21cyclictest0-21swapper/621:35:126
374500199220,21cyclictest0-21swapper/620:00:126
374500199220,21cyclictest0-21swapper/600:15:146
374500199220,1cyclictest3935513-21munin-run00:40:006
374500199220,1cyclictest3759887-21munin-run19:35:016
3745000992220,1cyclictest0-21swapper/522:55:135
3745000992220,1cyclictest0-21swapper/520:25:135
374500099220,21cyclictest3803000-21apt-get20:50:015
374500099220,21cyclictest0-21swapper/522:10:155
374500099220,21cyclictest0-21swapper/500:05:145
374500099220,1cyclictest3829407-21apt-get21:35:125
3744995992220,1cyclictest3863954-21apt-get22:35:114
374499599220,21cyclictest0-21swapper/423:45:144
374499599220,21cyclictest0-21swapper/423:29:594
374499599220,21cyclictest0-21swapper/423:00:194
374499599220,21cyclictest0-21swapper/422:40:014
374499599220,21cyclictest0-21swapper/421:25:134
374499599220,21cyclictest0-21swapper/421:25:134
374499599220,21cyclictest0-21swapper/420:55:144
374499599220,21cyclictest0-21swapper/420:35:124
374499599220,21cyclictest0-21swapper/420:05:124
374499599220,1cyclictest0-21swapper/419:50:134
3744993992220,1cyclictest3848992-21munin-run22:10:013
3744993992220,1cyclictest3809418-21apt-get21:00:123
3744993992220,1cyclictest0-21swapper/322:25:003
3744993992219,2cyclictest3774603-21apt-get20:00:123
374499399220,21cyclictest0-21swapper/321:45:143
374499399220,21cyclictest0-21swapper/320:35:123
374499399220,21cyclictest0-21swapper/319:45:143
374499399220,21cyclictest0-21swapper/319:20:133
374499399220,1cyclictest3817972-21apt-get21:15:123
3744990992220,2cyclictest0-21swapper/221:50:122
3744990992218,4cyclictest0-21swapper/221:20:132
374499099220,21cyclictest0-21swapper/223:50:122
374499099220,21cyclictest0-21swapper/200:19:592
374499099220,21cyclictest0-21swapper/200:05:132
374499099220,1cyclictest0-21swapper/200:14:592
3744986992221,1cyclictest0-21swapper/123:45:131
3744986992221,1cyclictest0-21swapper/122:25:001
3744986992221,1cyclictest0-21swapper/119:25:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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