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2025-12-30 - 04:36

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 Tue Dec 30, 2025 00:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111391860,31ptp4l0-21swapper/419:05:134
111391630,29ptp4l0-21swapper/119:09:291
189022550,0sleep60-21swapper/600:15:196
1260525544,7sleep70-21swapper/719:09:067
111391550,5ptp4l0-21swapper/019:07:470
1881915432,7phc2sys0-21swapper/319:09:533
1236324937,7sleep60-21swapper/619:06:016
1253924735,7sleep50-21swapper/519:08:165
1237724736,7sleep20-21swapper/219:06:132
111391310,6ptp4l0-21swapper/522:05:165
111391310,1ptp4l20354-21ssh21:30:144
111391300,0ptp4l0-21swapper/723:38:287
111391300,0ptp4l0-21swapper/523:25:165
111391300,0ptp4l0-21swapper/120:00:151
111391290,1ptp4l850-21switchtime19:50:194
111391290,0ptp4l0-21swapper/722:10:237
111391290,0ptp4l0-21swapper/700:33:057
111391290,0ptp4l0-21swapper/421:41:304
111391290,0ptp4l0-21swapper/400:24:284
111391290,0ptp4l0-21swapper/400:09:214
111391280,4ptp4l73-21ksoftirqd/721:34:037
111391280,0ptp4l0-21swapper/721:27:517
111391280,0ptp4l0-21swapper/523:10:555
111391280,0ptp4l0-21swapper/522:36:085
111391280,0ptp4l0-21swapper/521:52:135
111391280,0ptp4l0-21swapper/423:20:074
111391280,0ptp4l0-21swapper/423:02:434
111391280,0ptp4l0-21swapper/422:04:424
111391280,0ptp4l0-21swapper/421:16:114
111391280,0ptp4l0-21swapper/400:19:014
111391280,0ptp4l0-21swapper/021:42:300
111391280,0ptp4l0-21swapper/019:25:170
111391270,0ptp4l0-21swapper/700:35:287
111391270,0ptp4l0-21swapper/700:07:167
111391270,0ptp4l0-21swapper/523:45:325
111391270,0ptp4l0-21swapper/522:24:545
111391270,0ptp4l0-21swapper/423:31:394
111391270,0ptp4l0-21swapper/423:08:524
111391270,0ptp4l0-21swapper/422:54:354
111391270,0ptp4l0-21swapper/422:30:094
111391270,0ptp4l0-21swapper/422:20:214
111391270,0ptp4l0-21swapper/323:40:513
111391270,0ptp4l0-21swapper/300:35:243
111391270,0ptp4l0-21swapper/300:33:483
111391270,0ptp4l0-21swapper/123:11:051
111391270,0ptp4l0-21swapper/100:10:211
111391260,1ptp4l28446-21ssh00:28:245
111391260,0ptp4l0-21swapper/723:40:347
111391260,0ptp4l0-21swapper/721:00:237
111391260,0ptp4l0-21swapper/523:06:435
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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