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2026-04-01 - 08:57

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #6

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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack1slot6s.osadl.org (updated Wed Apr 01, 2026 00:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2485991090,4rtkit-daemon2484-21rtkit-daemon20:42:561
12110991004,89cyclictest0-21swapper/021:52:580
1211099954,83cyclictest0-21swapper/021:58:100
1211099953,85cyclictest0-21swapper/021:39:520
1211099953,85cyclictest0-21swapper/020:35:400
1211499943,82cyclictest0-21swapper/319:50:443
1211099945,81cyclictest0-21swapper/020:17:580
1211099945,81cyclictest0-21swapper/020:17:580
1211499935,82cyclictest0-21swapper/322:02:483
1211499933,81cyclictest0-21swapper/320:06:283
1211099933,84cyclictest0-21swapper/021:32:550
1211099933,82cyclictest9223-21grep19:33:020
1211099933,82cyclictest11593-21aten2.4-expect21:12:540
1211499923,81cyclictest0-21swapper/322:39:523
1211499914,79cyclictest7288-21latency21:53:013
1211099913,81cyclictest0-21swapper/020:49:040
1211099913,64cyclictest6351ssh21:43:070
1211099913,64cyclictest6351ssh21:43:070
1211099912,81cyclictest0-21swapper/022:32:500
1211499905,79cyclictest0-21swapper/320:01:383
1211499905,67cyclictest0-21swapper/320:43:333
1211499904,78cyclictest7573-21gltestperf20:18:013
1211499904,78cyclictest7573-21gltestperf20:18:013
1211499904,77cyclictest1085-21cat20:08:073
1211499902,82cyclictest0-21swapper/321:21:363
1211099904,79cyclictest0-21swapper/019:58:030
1211099904,79cyclictest0-21swapper/019:37:580
1211099904,78cyclictest0-21swapper/022:17:530
1211499894,77cyclictest0-21swapper/322:53:073
1211499894,77cyclictest0-21swapper/322:43:573
1211499893,79cyclictest0-21swapper/322:17:503
1211099893,80cyclictest0-21swapper/020:47:080
1211499884,49cyclictest0-21swapper/321:46:393
1211499884,49cyclictest0-21swapper/321:46:393
1211499883,78cyclictest4243-21grep20:13:023
1211499883,78cyclictest10724-21forks20:23:003
1211499883,77cyclictest25269-21ssh19:57:353
1211099884,77cyclictest0-21swapper/022:25:350
1211099884,76cyclictest0-21swapper/022:27:440
1211099884,76cyclictest0-21swapper/022:27:440
1211099883,78cyclictest0-21swapper/020:29:570
1211099883,78cyclictest0-21swapper/019:18:030
1211099883,76cyclictest21469-21grep20:38:060
248599870,31rtkit-daemon4992-21latency18:18:091
1211499875,73cyclictest0-21swapper/318:40:063
1211499874,75cyclictest0-21swapper/321:58:043
1211499874,75cyclictest0-21swapper/320:58:303
1211499874,75cyclictest0-21swapper/320:58:303
1211499874,75cyclictest0-21swapper/320:39:293
1211499874,74cyclictest0-21swapper/322:37:063
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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