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2026-05-21 - 12:49

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 20 highest latencies:
System rack8slot4s.osadl.org (updated Thu May 21, 2026 00:44:41)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13539022267181,24sleep50-21swapper/519:08:225
13538452232194,25sleep40-21swapper/419:07:344
13538562231192,26sleep60-21swapper/619:07:436
13538412230191,25sleep00-21swapper/019:07:290
13538142222183,26sleep20-21swapper/219:07:072
13539072221183,25sleep10-21swapper/119:08:261
13514882218184,22sleep70-21swapper/719:05:027
13537412217186,20sleep30-21swapper/319:06:033
14437352570,0sleep50-21swapper/521:40:005
135423899270,26cyclictest1440458-21cron21:35:005
135423299270,26cyclictest1455246-21idleruntime-cro22:00:003
135424099260,25cyclictest1502450-21dump-pmu-power23:20:006
135422699260,14cyclictest0-21swapper/021:55:150
135424099253,1cyclictest1546824-21ls00:35:016
135423899250,12cyclictest0-21swapper/522:23:405
135423599250,24cyclictest1431605-21basename21:20:004
135423299250,24cyclictest0-21swapper/300:15:113
1354231992521,3cyclictest1481832-21ls22:45:012
1354226992520,4cyclictest1-21systemd21:20:010
1354243992423,1cyclictest1488142-21apt-get22:55:117
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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