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2026-06-03 - 20:53

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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 rackcslot8s.osadl.org (updated Wed Jun 03, 2026 12:46:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111391630,26ptp4l0-21swapper/207:05:132
1746726239,6sleep40-21swapper/407:08:574
111391600,28ptp4l0-21swapper/007:05:570
1754125948,7sleep10-21swapper/107:09:501
157012590,1sleep557-21ksoftirqd/512:14:165
111391570,5ptp4l0-21swapper/607:05:226
1743225039,6sleep70-21swapper/707:08:287
1730224736,7sleep30-21swapper/307:06:483
1712724634,7sleep50-21swapper/507:05:215
111391350,0ptp4l0-21swapper/411:00:124
111391320,0ptp4l0-21swapper/010:00:580
111391310,0ptp4l0-21swapper/411:20:004
111391300,7ptp4l0-21swapper/410:59:064
111391300,2ptp4l0-21swapper/009:21:360
111391300,0ptp4l0-21swapper/511:13:085
111391300,0ptp4l0-21swapper/110:13:341
111391300,0ptp4l0-21swapper/011:15:110
111391300,0ptp4l0-21swapper/010:49:080
111391300,0ptp4l0-21swapper/009:25:150
111391300,0ptp4l0-21swapper/009:25:140
111391290,4ptp4l0-21swapper/107:30:121
111391290,0ptp4l8587-21diskmemload10:50:104
111391290,0ptp4l0-21swapper/510:35:135
111391290,0ptp4l0-21swapper/411:46:574
111391290,0ptp4l0-21swapper/410:29:094
111391290,0ptp4l0-21swapper/409:50:104
111391290,0ptp4l0-21swapper/409:35:004
111391290,0ptp4l0-21swapper/409:25:574
111391290,0ptp4l0-21swapper/409:25:574
111391290,0ptp4l0-21swapper/409:20:564
111391290,0ptp4l0-21swapper/407:50:224
111391290,0ptp4l0-21swapper/011:01:430
111391290,0ptp4l0-21swapper/009:17:060
111391280,0ptp4l0-21swapper/412:35:274
111391280,0ptp4l0-21swapper/412:25:534
111391280,0ptp4l0-21swapper/412:12:484
111391280,0ptp4l0-21swapper/412:05:544
111391280,0ptp4l0-21swapper/412:05:534
111391280,0ptp4l0-21swapper/410:46:054
111391280,0ptp4l0-21swapper/409:55:344
111391280,0ptp4l0-21swapper/112:20:491
111391280,0ptp4l0-21swapper/012:17:520
111391280,0ptp4l0-21swapper/010:18:210
111391280,0ptp4l0-21swapper/009:44:570
111391280,0ptp4l0-21swapper/009:37:440
111391280,0ptp4l0-21swapper/009:32:330
111391280,0ptp4l0-21swapper/008:50:140
111391280,0ptp4l0-21swapper/007:15:190
111391270,0ptp4l0-21swapper/509:59:395
111391270,0ptp4l0-21swapper/509:42:045
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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