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2026-04-11 - 18:43

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, 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 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 rackbslot8s (updated Sat Apr 11, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
37553852119105,9sleep20-21swapper/207:06:372
37553152119105,9sleep70-21swapper/707:05:377
37556022118103,10sleep60-21swapper/607:09:456
37553522118103,10sleep50-21swapper/507:06:075
37555542116101,10sleep30-21swapper/307:09:033
37555692114100,9sleep00-21swapper/007:09:160
3755458211298,9sleep10-21swapper/107:07:411
3755333210894,9sleep40-21swapper/407:05:514
3755856991030,100cyclictest0-21swapper/212:39:102
37558619910299,3cyclictest553-21snmpd10:45:533
37558619910299,3cyclictest553-21snmpd10:43:073
3755856991020,102cyclictest0-21swapper/207:38:012
37558529910299,3cyclictest553-21snmpd12:15:531
37558529910299,3cyclictest553-21snmpd11:43:021
37558529910299,3cyclictest553-21snmpd08:13:181
37558529910299,3cyclictest3852641-21cat09:40:151
3755876991010,100cyclictest0-21swapper/711:40:017
3755876991010,100cyclictest0-21swapper/710:04:337
37558739910199,2cyclictest553-21snmpd11:31:106
37558739910199,2cyclictest553-21snmpd11:01:426
37558739910199,2cyclictest553-21snmpd09:44:276
37558739910198,3cyclictest553-21snmpd08:53:416
37558739910198,3cyclictest553-21snmpd08:26:556
37558739910195,2cyclictest553-21snmpd10:19:296
3755873991010,101cyclictest0-21swapper/610:58:356
37558649910199,2cyclictest553-21snmpd10:16:314
37558649910199,2cyclictest553-21snmpd08:40:184
375586499101100,1cyclictest553-21snmpd09:51:244
37558619910199,2cyclictest553-21snmpd12:21:113
37558619910199,2cyclictest553-21snmpd10:06:553
37558619910199,2cyclictest553-21snmpd07:18:253
37558619910198,3cyclictest553-21snmpd11:17:283
375586199101100,1cyclictest553-21snmpd11:48:023
3755856991010,101cyclictest0-21swapper/209:53:122
3755856991010,100cyclictest0-21swapper/210:30:152
3755856991010,0cyclictest0-21swapper/208:27:042
37558529910199,2cyclictest553-21snmpd10:58:091
37558529910198,3cyclictest553-21snmpd10:37:371
3755852991010,99cyclictest0-21swapper/109:39:571
37558489910199,2cyclictest553-21snmpd12:28:270
37558489910199,2cyclictest553-21snmpd08:30:420
3755848991010,100cyclictest0-21swapper/007:15:140
3755876991000,99cyclictest0-21swapper/712:30:277
3755876991000,99cyclictest0-21swapper/712:08:117
3755876991000,99cyclictest0-21swapper/710:41:567
3755876991000,99cyclictest0-21swapper/710:07:257
3755876991000,99cyclictest0-21swapper/708:56:087
3755876991000,99cyclictest0-21swapper/708:09:247
3755876991000,100cyclictest0-21swapper/711:10:277
37558739910099,1cyclictest553-21snmpd12:18:366
37558739910099,1cyclictest553-21snmpd11:56:026
37558739910099,1cyclictest553-21snmpd11:15:336
37558739910099,1cyclictest553-21snmpd10:53:296
37558739910099,1cyclictest553-21snmpd10:35:416
37558739910099,1cyclictest553-21snmpd10:25:076
37558739910099,1cyclictest553-21snmpd09:15:236
37558739910099,1cyclictest3811109-21cat08:55:156
37558739910097,3cyclictest553-21snmpd07:18:476
3755873991000,99cyclictest0-21swapper/607:10:296
3755873991000,100cyclictest0-21swapper/609:32:146
3755873991000,100cyclictest0-21swapper/607:52:386
37558699910099,1cyclictest553-21snmpd12:34:385
37558699910099,1cyclictest553-21snmpd09:55:425
37558699910099,1cyclictest553-21snmpd09:47:405
37558699910099,1cyclictest553-21snmpd09:22:215
37558699910099,1cyclictest553-21snmpd09:18:115
37558699910099,1cyclictest553-21snmpd07:35:595
3755869991000,99cyclictest3873609-21kworker/5:110:02:095
3755869991000,99cyclictest0-21swapper/511:43:225
3755869991000,99cyclictest0-21swapper/511:33:585
3755869991000,100cyclictest0-21swapper/512:02:075
3755869991000,100cyclictest0-21swapper/508:00:305
37558649910099,1cyclictest553-21snmpd12:30:024
37558649910099,1cyclictest553-21snmpd10:52:264
37558649910099,1cyclictest553-21snmpd10:04:494
37558649910099,1cyclictest553-21snmpd09:15:294
37558649910099,1cyclictest553-21snmpd08:19:304
37558649910099,1cyclictest3813658-21cat09:00:144
37558649910098,1cyclictest553-21snmpd08:25:494
3755864991000,99cyclictest0-21swapper/411:42:044
3755864991000,99cyclictest0-21swapper/411:29:044
3755864991000,99cyclictest0-21swapper/410:32:084
3755864991000,99cyclictest0-21swapper/408:47:504
3755864991000,99cyclictest0-21swapper/407:37:324
3755864991000,100cyclictest0-21swapper/409:22:444
37558619910099,1cyclictest553-21snmpd12:08:423
37558619910099,1cyclictest553-21snmpd09:05:113
37558619910099,1cyclictest553-21snmpd09:00:403
37558619910099,1cyclictest553-21snmpd07:41:313
37558619910099,1cyclictest553-21snmpd07:14:203
37558619910098,2cyclictest553-21snmpd10:16:253
37558619910098,2cyclictest553-21snmpd10:14:363
37558619910097,3cyclictest553-21snmpd08:20:223
37558619910097,3cyclictest553-21snmpd08:17:253
37558569910099,1cyclictest553-21snmpd10:50:182
37558569910099,1cyclictest553-21snmpd10:12:242
3755856991000,99cyclictest0-21swapper/211:40:142
3755856991000,99cyclictest0-21swapper/209:27:112
3755856991000,100cyclictest0-21swapper/212:20:152
37558529910099,1cyclictest553-21snmpd12:15:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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