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2026-04-23 - 16:32

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 Thu Apr 23, 2026 12:46:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
111391660,14ptp4l0-21swapper/007:06:120
111391630,32ptp4l0-21swapper/107:08:551
78072600,1sleep09-21ksoftirqd/011:28:010
825125937,7sleep60-21swapper/607:06:556
111391580,11ptp4l0-21swapper/407:05:134
825625747,6sleep20-21swapper/207:06:592
1881915433,7phc2sys0-21swapper/307:08:373
835825331,7sleep50-21swapper/507:08:145
657925038,7sleep70-21swapper/707:05:037
111391350,0ptp4l0-21swapper/309:17:493
111391350,0ptp4l0-21swapper/012:21:130
111391320,3ptp4l0-21swapper/410:20:004
111391320,0ptp4l0-21swapper/009:26:160
111391320,0ptp4l0-21swapper/007:15:200
111391310,0ptp4l0-21swapper/510:45:135
111391310,0ptp4l0-21swapper/412:09:314
111391310,0ptp4l0-21swapper/110:45:211
111391310,0ptp4l0-21swapper/109:16:261
111391300,0ptp4l0-21swapper/511:12:475
111391300,0ptp4l0-21swapper/412:36:274
111391300,0ptp4l0-21swapper/410:50:204
111391300,0ptp4l0-21swapper/410:05:144
111391300,0ptp4l0-21swapper/011:52:250
111391300,0ptp4l0-21swapper/009:40:120
111391290,2ptp4l0-21swapper/409:42:494
111391290,0ptp4l0-21swapper/508:10:165
111391290,0ptp4l0-21swapper/411:47:244
111391290,0ptp4l0-21swapper/409:26:564
111391290,0ptp4l0-21swapper/311:20:033
111391290,0ptp4l0-21swapper/011:15:140
111391290,0ptp4l0-21swapper/010:22:350
111391290,0ptp4l0-21swapper/009:10:150
111391280,0ptp4l0-21swapper/711:41:327
111391280,0ptp4l0-21swapper/510:21:515
111391280,0ptp4l0-21swapper/509:10:415
111391280,0ptp4l0-21swapper/412:04:574
111391280,0ptp4l0-21swapper/411:51:374
111391280,0ptp4l0-21swapper/410:40:444
111391280,0ptp4l0-21swapper/410:28:214
111391280,0ptp4l0-21swapper/410:28:214
111391280,0ptp4l0-21swapper/409:31:004
111391280,0ptp4l0-21swapper/409:21:424
111391280,0ptp4l0-21swapper/409:19:444
111391280,0ptp4l0-21swapper/311:38:153
111391280,0ptp4l0-21swapper/110:38:411
111391280,0ptp4l0-21swapper/012:11:100
111391280,0ptp4l0-21swapper/012:07:220
111391280,0ptp4l0-21swapper/009:21:060
111391270,0ptp4l0-21swapper/709:18:397
111391270,0ptp4l0-21swapper/510:18:285
111391270,0ptp4l0-21swapper/412:34:394
111391270,0ptp4l0-21swapper/412:19:554
111391270,0ptp4l0-21swapper/412:11:524
111391270,0ptp4l0-21swapper/409:58:464
111391270,0ptp4l0-21swapper/409:12:454
111391270,0ptp4l0-21swapper/012:19:020
111391270,0ptp4l0-21swapper/010:40:150
111391270,0ptp4l0-21swapper/009:30:340
111391260,6ptp4l0-21swapper/510:42:015
111391260,3ptp4l0-21swapper/111:55:221
111391260,3ptp4l0-21swapper/008:10:190
111391260,2ptp4l0-21swapper/611:54:556
111391260,2ptp4l0-21swapper/309:52:153
111391260,0ptp4l0-21swapper/511:56:475
111391260,0ptp4l0-21swapper/509:33:145
111391260,0ptp4l0-21swapper/411:34:214
111391260,0ptp4l0-21swapper/411:24:544
111391260,0ptp4l0-21swapper/410:31:224
111391260,0ptp4l0-21swapper/410:31:214
111391260,0ptp4l0-21swapper/409:36:024
111391260,0ptp4l0-21swapper/407:45:004
111391260,0ptp4l0-21swapper/310:13:483
111391260,0ptp4l0-21swapper/111:37:321
111391260,0ptp4l0-21swapper/012:27:230
111391260,0ptp4l0-21swapper/012:00:360
111391260,0ptp4l0-21swapper/010:50:150
111391260,0ptp4l0-21swapper/010:09:340
111391260,0ptp4l0-21swapper/009:37:110
111391260,0ptp4l0-21swapper/007:45:130
111391260,0ptp4l0-21swapper/007:45:130
111391250,1ptp4l8326-21timerandwakeup08:15:210
111391250,1ptp4l26079-21memory12:35:150
111391250,1ptp4l15229-21ptp4l-jitter07:20:175
111391250,0ptp4l0-21swapper/512:38:205
111391250,0ptp4l0-21swapper/511:43:075
111391250,0ptp4l0-21swapper/511:06:155
111391250,0ptp4l0-21swapper/510:06:595
111391250,0ptp4l0-21swapper/412:25:174
111391250,0ptp4l0-21swapper/411:55:154
111391250,0ptp4l0-21swapper/411:35:224
111391250,0ptp4l0-21swapper/410:38:164
111391250,0ptp4l0-21swapper/408:35:144
111391250,0ptp4l0-21swapper/408:00:204
111391250,0ptp4l0-21swapper/407:35:004
111391250,0ptp4l0-21swapper/110:58:471
111391250,0ptp4l0-21swapper/109:33:171
111391250,0ptp4l0-21swapper/010:57:470
111391250,0ptp4l0-21swapper/010:01:160
111391250,0ptp4l0-21swapper/009:00:130
111391250,0ptp4l0-21swapper/007:35:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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