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2026-09-01 - 06:53

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 Tue Sep 01, 2026 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
94080820,76rtkit-daemon0-21swapper/419:05:136
283491810,60ptp4l0-21swapper/119:06:561
1029826856,10sleep110-21swapper/1119:08:573
707926755,10sleep100-21swapper/1019:05:092
1004526755,9sleep50-21swapper/519:05:277
1036826655,9sleep00-21swapper/019:09:590
1008826654,10sleep70-21swapper/719:05:539
1026726554,9sleep60-21swapper/619:08:288
292702490,0sleep80-21swapper/800:30:1410
1077799250,1cyclictest741rcuc/1023:45:152
1076399181,3cyclictest0-21swapper/719:40:189
1075099183,14cyclictest0-21swapper/419:15:006
1074099182,11cyclictest0-21swapper/223:40:014
1073499183,9cyclictest0-21swapper/100:30:001
1077299174,8cyclictest0-21swapper/919:20:0011
1077299173,8cyclictest0-21swapper/921:15:0011
1076899173,9cyclictest0-21swapper/823:25:0110
1075099172,14cyclictest0-21swapper/422:00:006
1075099172,14cyclictest0-21swapper/420:10:006
1074599172,9cyclictest0-21swapper/323:25:235
1074099173,8cyclictest0-21swapper/219:15:244
1074099172,10cyclictest0-21swapper/223:05:024
1073499171,12cyclictest14099-21kworker/u24:020:10:001
1072999170,17cyclictest0-21swapper/020:50:170
1072999170,17cyclictest0-21swapper/020:50:160
283491160,1ptp4l21-21ksoftirqd/122:25:161
283491160,1ptp4l21-21ksoftirqd/100:35:131
283491160,0ptp4l0-21swapper/123:40:181
168732160,0sleep70-21swapper/721:20:189
1077299162,9cyclictest0-21swapper/919:30:0011
1076899163,8cyclictest0-21swapper/821:47:0610
1076899162,8cyclictest0-21swapper/800:00:0010
1076899162,10cyclictest14099-21kworker/u24:020:35:0110
1076899162,10cyclictest14099-21kworker/u24:020:35:0110
1076399162,9cyclictest0-21swapper/720:45:019
1076399162,9cyclictest0-21swapper/720:45:019
1075999162,8cyclictest0-21swapper/623:05:018
1075099162,13cyclictest0-21swapper/420:50:016
1075099162,13cyclictest0-21swapper/420:50:016
1074599163,8cyclictest0-21swapper/321:00:255
1074099163,9cyclictest0-21swapper/223:40:014
1074099163,9cyclictest0-21swapper/220:30:004
1074099163,8cyclictest0-21swapper/200:10:004
1073499164,7cyclictest0-21swapper/121:05:001
1072999163,7cyclictest0-21swapper/019:25:000
101742167,7sleep80-21swapper/819:07:0610
283491150,1ptp4l21-21ksoftirqd/121:05:201
1077299152,8cyclictest0-21swapper/900:10:0011
1076899153,7cyclictest0-21swapper/821:20:2310
1076899151,7cyclictest0-21swapper/823:20:0110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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