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OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #3

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 rack9slot3s.osadl.org (updated Fri Jan 23, 2026 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
119591680,51ptp4l0-21swapper/019:07:150
119591620,31ptp4l0-21swapper/119:09:111
3260225446,2sleep30-21swapper/319:05:023
241024945,2sleep20-21swapper/219:05:452
256632440,0sleep00-21swapper/023:50:230
119591190,0ptp4l0-21swapper/123:20:211
119591190,0ptp4l0-21swapper/023:01:380
119591180,0ptp4l0-21swapper/022:25:170
119591170,0ptp4l0-21swapper/122:00:181
119591170,0ptp4l0-21swapper/100:20:211
119591170,0ptp4l0-21swapper/100:20:211
119591170,0ptp4l0-21swapper/100:10:191
119591160,1ptp4l9123-21apt-get19:20:131
119591160,1ptp4l24402-21apt-get21:50:120
119591160,0ptp4l0-21swapper/022:45:180
119591160,0ptp4l0-21swapper/020:15:230
119591160,0ptp4l0-21swapper/020:05:570
119591160,0ptp4l0-21swapper/000:35:270
119591150,1ptp4l6956-21snmp_o5powerctl22:15:221
119591150,1ptp4l5501-21df_inode00:15:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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