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2026-06-13 - 01:48

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #8

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 rack0slot8s.osadl.org (updated Sat Jun 13, 2026 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2834911020,92ptp4l0-21swapper/119:05:151
1551926856,10sleep110-21swapper/1119:08:293
1547726755,10sleep100-21swapper/1019:07:522
1547426756,9sleep70-21swapper/719:07:509
1540326749,9sleep50-21swapper/519:06:477
1551026655,9sleep40-21swapper/419:08:236
1541826654,10sleep60-21swapper/619:07:008
1538526654,10sleep00-21swapper/019:06:290
41142500,0sleep71009-21runrttasks23:05:139
306322470,0sleep40-21swapper/400:20:186
263172470,0sleep00-21swapper/021:25:200
1601299220,1cyclictest0-21swapper/1021:15:162
1598399202,14cyclictest0-21swapper/422:40:016
1598399202,14cyclictest0-21swapper/422:40:006
1598399191,6cyclictest0-21swapper/420:50:016
1598399190,14cyclictest0-21swapper/422:05:016
283491180,0ptp4l0-21swapper/123:05:141
305392170,0sleep30-21swapper/322:55:195
283491170,1ptp4l21-21ksoftirqd/121:00:131
1599299173,8cyclictest0-21swapper/600:10:008
1597099173,9cyclictest0-21swapper/121:00:011
1597099171,14cyclictest0-21swapper/100:15:181
1597099170,3cyclictest0-21swapper/123:25:161
283491160,1ptp4l21-21ksoftirqd/120:45:201
283491160,1ptp4l0-21swapper/121:15:181
283491160,0ptp4l0-21swapper/122:00:211
1599899163,7cyclictest0-21swapper/700:25:019
1599299163,8cyclictest0-21swapper/600:40:008
155962167,7sleep80-21swapper/819:09:3810
94080150,3rtkit-daemon0-21swapper/000:12:490
283491150,1ptp4l21-21ksoftirqd/120:25:161
283491150,0ptp4l0-21swapper/100:20:131
1601299150,1cyclictest0-21swapper/1019:25:162
1600299154,7cyclictest0-21swapper/820:40:0110
1599899152,8cyclictest0-21swapper/700:30:009
1599299153,8cyclictest0-21swapper/619:50:008
1597099154,7cyclictest0-21swapper/120:20:001
1596599154,5cyclictest0-21swapper/023:55:010
1596599152,8cyclictest0-21swapper/021:00:010
283491140,5ptp4l21-21ksoftirqd/122:35:131
283491140,5ptp4l21-21ksoftirqd/122:35:121
283491140,2ptp4l1992-21sed19:30:161
283491140,1ptp4l21-21ksoftirqd/121:45:121
283491140,0ptp4l0-21swapper/120:50:141
1599299142,8cyclictest5286-21kworker/u24:200:15:008
1599299141,2cyclictest0-21swapper/623:50:168
1597099142,7cyclictest0-21swapper/119:25:251
1597099142,7cyclictest0-21swapper/119:20:011
1597099140,2cyclictest0-21swapper/122:10:161
1596599143,6cyclictest0-21swapper/020:20:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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