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2026-07-28 - 07:00

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 Tue Jul 28, 2026 00:44:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
569532248174,23sleep30-21swapper/319:08:293
568512237199,25sleep20-21swapper/219:07:012
569572227193,22sleep70-21swapper/719:08:347
568532220183,25sleep40-21swapper/419:07:024
545312218180,25sleep60-21swapper/619:05:036
570492217185,21sleep50-21swapper/519:09:525
567912217186,20sleep10-21swapper/119:06:111
570532215176,25sleep00-21swapper/019:09:560
1651772530,0sleep40-21swapper/422:10:134
5726699280,21cyclictest128755-21sh21:10:001
5727299270,23cyclictest219069-21ntpq23:40:193
5727299270,22cyclictest0-21swapper/322:25:203
5726699260,0cyclictest0-21swapper/119:55:131
5726399260,22cyclictest161207-21awk22:05:000
5728199250,24cyclictest181860-21idleruntime-cro22:40:007
57277992522,2cyclictest134655-21grep21:19:595
5727799250,24cyclictest175958-21munin-run22:29:595
5727499251,23cyclictest146467-21awk21:40:004
5727299250,24cyclictest0-21swapper/320:10:043
5726699253,22cyclictest0-21swapper/100:00:001
5726699250,1cyclictest112824-21ntpq20:40:181
5726699250,0cyclictest0-21swapper/120:25:121
57263992523,1cyclictest241614-21cron00:20:010
57263992523,1cyclictest0-21swapper/020:20:010
5728199240,2cyclictest78607-21turbostat19:45:017
5728199240,24cyclictest1-21systemd20:20:017
57278992422,2cyclictest214299-21923:35:006
5727799240,23cyclictest173203-21date22:25:015
57274992420,3cyclictest238101-21latency_hist00:15:004
57272992422,1cyclictest0-21swapper/300:10:133
57272992421,2cyclictest72705-21apt19:35:013
57272992420,3cyclictest0-21swapper/322:20:173
5727299240,22cyclictest223565-21apt-get23:50:133
5727299240,21cyclictest229474-21apt-get00:00:123
5727299240,21cyclictest0-21swapper/321:40:113
5727299240,1cyclictest76100-21apt-get19:40:133
5727299240,1cyclictest0-21swapper/321:10:003
5727299240,0cyclictest0-21swapper/322:15:203
5727299240,0cyclictest0-21swapper/321:50:133
57267992423,0cyclictest0-21swapper/222:55:142
57267992419,4cyclictest152341-21turbostat21:50:002
57267992419,4cyclictest146421-21cron21:39:592
5726799240,23cyclictest0-21swapper/223:40:122
57266992422,2cyclictest214725-21apt-get23:35:151
57266992419,4cyclictest250481-21munin-run00:35:001
5726699240,23cyclictest74439-21ntpq19:35:191
5726699240,23cyclictest0-21swapper/122:40:131
57263992424,0cyclictest0-21swapper/023:30:130
57263992422,1cyclictest0-21swapper/020:30:010
57281992321,1cyclictest205852-21apt-get23:20:117
5728199230,23cyclictest0-21swapper/723:45:187
5728199230,22cyclictest245025-21apt-get00:25:127
5727899230,22cyclictest234932-21grep00:10:006
5727899230,1cyclictest60117-21perf19:15:016
57277992323,0cyclictest0-21swapper/520:00:145
57277992322,1cyclictest217686-21apt-get23:40:135
57277992322,1cyclictest0-21swapper/500:35:015
57274992321,2cyclictest217272-21tr23:40:004
57274992319,3cyclictest0-21swapper/423:05:004
5727499230,22cyclictest241630-21latency_hist00:20:004
5727499230,22cyclictest0-21swapper/423:25:144
5727499230,22cyclictest0-21swapper/421:20:114
5727499230,22cyclictest0-21swapper/421:15:134
5727499230,22cyclictest0-21swapper/419:55:154
5727499230,22cyclictest0-21swapper/419:40:204
5727499230,1cyclictest0-21swapper/419:50:124
57272992320,3cyclictest191108-21apt-get22:55:143
57272992320,3cyclictest0-21swapper/323:35:133
57272992319,3cyclictest0-21swapper/320:45:143
5727299230,22cyclictest0-21swapper/319:20:123
57267992323,0cyclictest126256-21apt-get21:05:142
57267992321,1cyclictest196576-21apt23:05:012
57267992321,1cyclictest0-21swapper/223:10:182
57267992319,4cyclictest0-21swapper/220:10:012
5726799230,23cyclictest0-21swapper/223:50:172
5726799230,22cyclictest0-21swapper/221:25:192
5726799230,22cyclictest0-21swapper/221:15:142
5726799230,22cyclictest0-21swapper/220:25:192
5726799230,0cyclictest0-21swapper/220:00:142
57266992322,1cyclictest96738-21apt-get20:15:121
57266992322,1cyclictest0-21swapper/119:35:011
57266992321,2cyclictest0-21swapper/122:20:101
5726699230,3cyclictest134628-21cron21:20:001
5726699230,23cyclictest0-21swapper/100:10:141
5726699230,22cyclictest0-21swapper/120:20:131
5726699230,0cyclictest0-21swapper/120:05:131
57263992323,0cyclictest0-21swapper/022:45:130
57263992323,0cyclictest0-21swapper/022:45:120
57263992323,0cyclictest0-21swapper/000:35:110
57263992320,3cyclictest226092-21idleruntime-cro23:55:000
5726399230,22cyclictest0-21swapper/021:50:110
5726399230,22cyclictest0-21swapper/021:10:200
5726399230,22cyclictest0-21swapper/020:40:120
5726399230,22cyclictest0-21swapper/020:05:120
5726399230,22cyclictest0-21swapper/000:10:130
5726399230,1cyclictest161623-21apt-get22:05:130
57281992222,0cyclictest0-21swapper/719:30:127
57281992221,1cyclictest190684-21munin-run22:55:017
57281992221,1cyclictest190684-21munin-run22:55:007
57281992221,1cyclictest120356-21apt-get20:55:147
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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