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2026-01-02 - 22:53

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 100 highest latencies:
System rackcslot8s.osadl.org (updated Fri Jan 02, 2026 12:46:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
214212640,0sleep30-21swapper/312:30:103
111391640,5ptp4l0-21swapper/007:08:520
111391640,31ptp4l0-21swapper/107:05:201
224662610,0sleep60-21swapper/609:42:326
111391590,2ptp4l0-21swapper/507:05:215
478225848,6sleep20-21swapper/207:09:392
470125735,17sleep70-21swapper/707:08:397
451625634,7sleep30-21swapper/307:06:193
111391550,13ptp4l0-21swapper/407:07:314
479724635,7sleep60-21swapper/607:09:516
111391390,0ptp4l0-21swapper/011:05:150
111391380,0ptp4l0-21swapper/410:48:494
111391360,0ptp4l0-21swapper/507:15:005
111391360,0ptp4l0-21swapper/410:24:594
111391350,0ptp4l0-21swapper/412:24:054
111391330,0ptp4l0-21swapper/411:22:104
111391330,0ptp4l0-21swapper/407:30:234
111391310,0ptp4l0-21swapper/412:03:304
111391310,0ptp4l0-21swapper/411:58:364
111391310,0ptp4l0-21swapper/010:53:120
111391310,0ptp4l0-21swapper/010:19:120
111391300,3ptp4l0-21swapper/412:17:244
111391300,0ptp4l0-21swapper/512:15:425
111391300,0ptp4l0-21swapper/412:32:074
111391300,0ptp4l0-21swapper/411:47:124
111391300,0ptp4l0-21swapper/410:50:244
111391300,0ptp4l0-21swapper/410:39:124
111391300,0ptp4l0-21swapper/410:28:274
111391300,0ptp4l0-21swapper/410:08:124
111391300,0ptp4l0-21swapper/409:10:514
111391300,0ptp4l0-21swapper/012:36:480
111391300,0ptp4l0-21swapper/009:35:180
111391300,0ptp4l0-21swapper/009:20:140
111391300,0ptp4l0-21swapper/009:10:340
111391300,0ptp4l0-21swapper/008:55:200
111391290,3ptp4l0-21swapper/211:30:042
111391290,1ptp4l28895-21sh11:56:520
111391290,0ptp4l0-21swapper/512:00:215
111391290,0ptp4l0-21swapper/510:37:165
111391290,0ptp4l0-21swapper/412:12:564
111391290,0ptp4l0-21swapper/411:25:224
111391290,0ptp4l0-21swapper/409:55:224
111391290,0ptp4l0-21swapper/409:42:524
111391290,0ptp4l0-21swapper/409:20:354
111391290,0ptp4l0-21swapper/012:18:220
111391290,0ptp4l0-21swapper/012:10:340
111391290,0ptp4l0-21swapper/011:46:230
111391280,3ptp4l561ktimersoftd/510:09:285
111391280,0ptp4l0-21swapper/710:45:437
111391280,0ptp4l0-21swapper/510:04:195
111391280,0ptp4l0-21swapper/509:31:555
111391280,0ptp4l0-21swapper/411:11:524
111391280,0ptp4l0-21swapper/411:11:524
111391280,0ptp4l0-21swapper/410:57:374
111391280,0ptp4l0-21swapper/408:45:204
111391280,0ptp4l0-21swapper/210:48:322
111391280,0ptp4l0-21swapper/210:01:122
111391280,0ptp4l0-21swapper/011:19:100
111391280,0ptp4l0-21swapper/010:59:330
111391280,0ptp4l0-21swapper/010:08:140
111391270,0ptp4l0-21swapper/709:11:267
111391270,0ptp4l0-21swapper/511:49:595
111391270,0ptp4l0-21swapper/510:49:305
111391270,0ptp4l0-21swapper/411:07:024
111391270,0ptp4l0-21swapper/410:19:194
111391270,0ptp4l0-21swapper/409:25:194
111391270,0ptp4l0-21swapper/212:26:382
111391270,0ptp4l0-21swapper/012:25:550
111391270,0ptp4l0-21swapper/012:06:160
111391270,0ptp4l0-21swapper/009:44:000
111391270,0ptp4l0-21swapper/009:28:470
111391270,0ptp4l0-21swapper/008:20:140
111391260,0ptp4l0-21swapper/511:34:195
111391260,0ptp4l0-21swapper/511:15:485
111391260,0ptp4l0-21swapper/509:54:365
111391260,0ptp4l0-21swapper/412:26:054
111391260,0ptp4l0-21swapper/411:31:584
111391260,0ptp4l0-21swapper/411:00:104
111391260,0ptp4l0-21swapper/110:11:141
111391260,0ptp4l0-21swapper/009:55:590
111391260,0ptp4l0-21swapper/009:53:200
111391260,0ptp4l0-21swapper/009:05:180
111391250,1ptp4l14543-21timerandwakeup10:55:191
111391250,0ptp4l0-21swapper/511:52:445
111391250,0ptp4l0-21swapper/511:41:175
111391250,0ptp4l0-21swapper/511:10:015
111391250,0ptp4l0-21swapper/510:54:245
111391250,0ptp4l0-21swapper/509:12:505
111391250,0ptp4l0-21swapper/507:45:215
111391250,0ptp4l0-21swapper/412:05:434
111391250,0ptp4l0-21swapper/411:53:094
111391250,0ptp4l0-21swapper/410:32:224
111391250,0ptp4l0-21swapper/409:34:164
111391250,0ptp4l0-21swapper/409:17:284
111391250,0ptp4l0-21swapper/408:20:214
111391250,0ptp4l0-21swapper/407:29:594
111391250,0ptp4l0-21swapper/308:24:563
111391250,0ptp4l0-21swapper/210:06:222
111391250,0ptp4l0-21swapper/111:25:331
111391250,0ptp4l0-21swapper/111:15:451
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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