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2026-03-12 - 20:21

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 50 highest latencies:
System rack8slot4s.osadl.org (updated Thu Mar 12, 2026 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2490192234172,49sleep30-21swapper/307:09:443
2487612223190,21sleep60-21swapper/607:06:026
2489612218180,24sleep20-21swapper/207:08:552
2490322216179,23sleep70-21swapper/707:09:567
2487932215178,24sleep00-21swapper/007:06:280
2489822211178,21sleep50-21swapper/507:09:145
2474272211184,17sleep10-21swapper/107:05:161
2488422207174,22sleep40-21swapper/407:07:124
24926199280,23cyclictest391387-21apt-get11:15:100
24926199270,21cyclictest0-21swapper/008:25:120
24926199260,22cyclictest417204-21munin-run12:00:000
24926199250,3cyclictest405258-21basename11:40:000
24926199250,24cyclictest0-21swapper/007:20:110
24926199250,21cyclictest0-21swapper/010:05:000
249283992422,1cyclictest293439-21apt-get08:25:127
24928399240,23cyclictest0-21swapper/709:45:117
24928399240,1cyclictest428686-21apt-key12:20:007
249276992423,1cyclictest0-21swapper/509:10:125
24927699240,23cyclictest422922-21munin-run12:10:005
24927699240,1cyclictest0-21swapper/510:20:115
24927699240,1cyclictest0-21swapper/510:20:115
24927599240,23cyclictest272761-21awk07:50:004
24927599240,0cyclictest0-21swapper/411:20:124
249271992422,1cyclictest0-21swapper/309:40:113
249271992422,1cyclictest0-21swapper/307:15:013
249268992421,2cyclictest363-21systemd-journal12:19:592
24926899240,1cyclictest0-21swapper/211:00:002
249265992423,1cyclictest371411-21apt-get10:40:101
249265992423,1cyclictest0-21swapper/108:25:001
249261992416,7cyclictest0-21swapper/009:45:000
24926199240,23cyclictest428641-21idleruntime-cro12:20:000
24926199240,23cyclictest0-21swapper/010:05:110
24928399230,22cyclictest0-21swapper/712:35:117
24928399230,22cyclictest0-21swapper/711:10:007
24928399230,22cyclictest0-21swapper/708:50:127
24928399230,22cyclictest0-21swapper/708:40:117
24928199230,1cyclictest318831-21unin-run09:10:006
249276992322,1cyclictest0-21swapper/510:35:005
249276992321,1cyclictest0-21swapper/512:40:005
24927699230,23cyclictest411237-21munin-run11:50:015
24927699230,22cyclictest313029-21cron09:00:005
249275992321,1cyclictest385685-21apt-get11:05:124
249275992321,1cyclictest0-21swapper/408:50:004
24927599230,22cyclictest0-21swapper/409:35:484
249271992323,0cyclictest0-21swapper/310:05:113
249271992320,2cyclictest326424-21ntpq09:20:173
24927199230,22cyclictest0-21swapper/312:15:113
24927199230,22cyclictest0-21swapper/310:30:113
24927199230,22cyclictest0-21swapper/307:40:113
24927199230,1cyclictest432179-21apt-get12:25:123
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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