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2026-03-13 - 05:37

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 50 highest latencies:
System rack9slot3s.osadl.org (updated Fri Mar 13, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1300916247,1phc2sys0-21swapper/019:05:220
119591610,31ptp4l0-21swapper/119:05:011
119591590,42ptp4l0-21swapper/219:09:422
352025045,3sleep30-21swapper/319:06:123
119591200,0ptp4l0-21swapper/120:15:181
119591200,0ptp4l0-21swapper/100:25:261
119591190,0ptp4l0-21swapper/121:45:131
119591190,0ptp4l0-21swapper/023:55:170
119591180,0ptp4l0-21swapper/122:40:191
119591180,0ptp4l0-21swapper/020:10:150
119591170,0ptp4l0-21swapper/121:00:231
119591170,0ptp4l0-21swapper/022:20:140
119591160,1ptp4l8682-21apt-get00:20:110
119591160,1ptp4l25792-21apt-get21:50:120
119591160,0ptp4l0-21swapper/123:33:531
119591160,0ptp4l0-21swapper/021:29:560
119591160,0ptp4l0-21swapper/020:45:140
119591150,1ptp4l8460-21ls22:15:220
119591150,1ptp4l6477-21ls21:10:251
119591150,1ptp4l5996-21awk20:10:181
119591150,1ptp4l4683-21hddtemp_smartct22:10:140
119591150,1ptp4l4577-21ls00:10:170
119591150,1ptp4l3506-21awk21:05:200
119591150,1ptp4l31730-21memory23:00:171
119591150,1ptp4l30439-21snmp_o5powerctl20:55:231
119591150,1ptp4l16049-21ls23:30:230
119591150,1ptp4l15240-21munin-run19:30:020
119591150,1ptp4l15240-21munin-run19:30:010
119591150,1ptp4l1381-21unattended-upgr21:01:230
119591150,1ptp4l11471-21ls19:20:151
119591150,0ptp4l18122-21apt-get19:35:110
119591150,0ptp4l0-21swapper/122:05:111
119591150,0ptp4l0-21swapper/120:35:151
119591150,0ptp4l0-21swapper/100:10:131
119591150,0ptp4l0-21swapper/023:25:130
119591150,0ptp4l0-21swapper/020:30:130
119591150,0ptp4l0-21swapper/020:00:110
119591150,0ptp4l0-21swapper/019:45:110
119591140,1ptp4l9-21ksoftirqd/019:50:130
119591140,1ptp4l9007-21hostname23:20:131
119591140,1ptp4l8109-21cut19:15:161
119591140,1ptp4l5042-21phc2sys23:10:180
119591140,1ptp4l4614-21aten_r9power_cu21:10:130
119591140,1ptp4l32109-21ls00:00:230
119591140,1ptp4l28438-21apt-get21:55:130
119591140,1ptp4l27176-21ntp_states21:50:191
119591140,1ptp4l26423-21cstates20:50:151
119591140,1ptp4l25924-21irqrtprio23:50:170
119591140,1ptp4l24756-21latency_hist23:50:011
119591140,1ptp4l24308-21ls22:45:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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