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2026-07-25 - 04:26

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 100 highest latencies:
System rackcslot8s.osadl.org (updated Sat Jul 25, 2026 00:46:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
128192650,0sleep70-21swapper/722:50:157
206602620,0sleep00-21swapper/020:40:010
111391620,5ptp4l0-21swapper/019:09:440
149832610,0sleep60-21swapper/622:54:246
111391610,30ptp4l0-21swapper/119:05:081
111391610,15ptp4l0-21swapper/419:06:274
9152600,0sleep60-21swapper/622:35:016
887226039,6sleep20-21swapper/219:05:032
210912600,0sleep41068-21runrttasks20:40:124
1045626048,7sleep70-21swapper/719:05:507
175592590,0sleep11068-21runrttasks22:56:271
1881915532,7phc2sys0-21swapper/519:06:055
887324736,7sleep30-21swapper/319:05:043
1071524736,6sleep60-21swapper/619:09:086
111391330,0ptp4l0-21swapper/423:15:004
111391330,0ptp4l0-21swapper/019:10:190
111391330,0ptp4l0-21swapper/019:10:190
111391320,1ptp4l12902-21sh22:05:450
111391320,0ptp4l0-21swapper/023:59:120
111391310,0ptp4l0-21swapper/021:18:280
111391300,0ptp4l0-21swapper/721:35:457
111391300,0ptp4l0-21swapper/423:50:524
111391300,0ptp4l0-21swapper/400:05:214
111391300,0ptp4l0-21swapper/123:18:291
111391300,0ptp4l0-21swapper/121:15:161
111391300,0ptp4l0-21swapper/100:04:251
111391300,0ptp4l0-21swapper/023:18:020
111391300,0ptp4l0-21swapper/023:03:110
111391300,0ptp4l0-21swapper/022:59:400
111391300,0ptp4l0-21swapper/021:32:460
111391290,0ptp4l0-21swapper/423:40:594
111391290,0ptp4l0-21swapper/423:26:464
111391290,0ptp4l0-21swapper/423:14:154
111391290,0ptp4l0-21swapper/422:48:024
111391290,0ptp4l0-21swapper/421:34:334
111391290,0ptp4l0-21swapper/023:54:010
111391290,0ptp4l0-21swapper/022:40:170
111391290,0ptp4l0-21swapper/021:47:410
111391290,0ptp4l0-21swapper/021:47:410
111391290,0ptp4l0-21swapper/019:15:160
111391280,0ptp4l0-21swapper/722:02:057
111391280,0ptp4l0-21swapper/422:43:284
111391280,0ptp4l0-21swapper/421:45:204
111391280,0ptp4l0-21swapper/421:45:194
111391280,0ptp4l0-21swapper/421:29:284
111391280,0ptp4l0-21swapper/421:13:114
111391280,0ptp4l0-21swapper/400:02:524
111391280,0ptp4l0-21swapper/121:14:311
111391280,0ptp4l0-21swapper/023:46:500
111391280,0ptp4l0-21swapper/023:40:470
111391280,0ptp4l0-21swapper/023:35:530
111391280,0ptp4l0-21swapper/022:34:200
111391280,0ptp4l0-21swapper/022:11:070
111391280,0ptp4l0-21swapper/022:01:060
111391280,0ptp4l0-21swapper/021:13:520
111391280,0ptp4l0-21swapper/000:31:230
111391270,0ptp4l0-21swapper/422:35:564
111391270,0ptp4l0-21swapper/422:28:104
111391270,0ptp4l0-21swapper/422:12:434
111391270,0ptp4l0-21swapper/421:40:054
111391270,0ptp4l0-21swapper/421:21:044
111391270,0ptp4l0-21swapper/421:17:484
111391270,0ptp4l0-21swapper/419:29:284
111391270,0ptp4l0-21swapper/400:34:324
111391270,0ptp4l0-21swapper/400:21:394
111391270,0ptp4l0-21swapper/400:21:384
111391270,0ptp4l0-21swapper/022:26:030
111391270,0ptp4l0-21swapper/021:26:410
111391270,0ptp4l0-21swapper/000:35:530
111391260,1ptp4l25-21ksoftirqd/119:35:201
111391260,0ptp4l0-21swapper/500:20:545
111391260,0ptp4l0-21swapper/500:20:535
111391260,0ptp4l0-21swapper/423:36:354
111391260,0ptp4l0-21swapper/423:05:594
111391260,0ptp4l0-21swapper/422:20:204
111391260,0ptp4l0-21swapper/420:29:284
111391260,0ptp4l0-21swapper/400:38:344
111391260,0ptp4l0-21swapper/400:26:184
111391260,0ptp4l0-21swapper/400:14:584
111391260,0ptp4l0-21swapper/122:27:321
111391260,0ptp4l0-21swapper/122:21:121
111391260,0ptp4l0-21swapper/022:52:090
111391260,0ptp4l0-21swapper/022:16:160
111391260,0ptp4l0-21swapper/021:20:150
111391260,0ptp4l0-21swapper/019:50:110
111391250,4ptp4l0-21swapper/421:37:544
111391250,0ptp4l0-21swapper/422:55:324
111391250,0ptp4l0-21swapper/422:05:084
111391250,0ptp4l0-21swapper/422:00:224
111391250,0ptp4l0-21swapper/419:50:174
111391250,0ptp4l0-21swapper/419:10:134
111391250,0ptp4l0-21swapper/419:10:124
111391250,0ptp4l0-21swapper/122:37:381
111391250,0ptp4l0-21swapper/121:54:111
111391250,0ptp4l0-21swapper/120:55:171
111391250,0ptp4l0-21swapper/022:21:020
111391250,0ptp4l0-21swapper/021:37:430
111391250,0ptp4l0-21swapper/020:35:000
111391250,0ptp4l0-21swapper/000:08:350
111391240,2ptp4l0-21swapper/123:04:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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