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2025-09-19 - 07:03

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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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  Congatec
Click here to display the system's profile data.
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 rackeslot8s.osadl.org (updated Fri Sep 19, 2025 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33477199755751,3cyclictest461683-21kworker/3:2+events23:18:293
33476999752748,3cyclictest506449-21kworker/2:1+events00:29:512
33477199748744,3cyclictest593369-21turbostat22:44:553
33476999747743,3cyclictest2408932-21kworker/2:2+events21:06:562
33477199746742,3cyclictest461683-21kworker/3:2+events21:42:543
33477199745738,3cyclictest191rcu_preempt21:25:233
33477199744740,3cyclictest730584-21turbostat00:34:553
33476999744739,4cyclictest506449-21kworker/2:1+events00:32:282
33476599743739,3cyclictest1364500-21kworker/1:0+events19:23:541
33477199742739,2cyclictest618185-21turbostat23:04:553
33477199740735,3cyclictest461683-21kworker/3:2+events22:35:223
33477199738734,3cyclictest461683-21kworker/3:2+events22:24:393
33477199738732,5cyclictest461683-21kworker/3:2+events22:00:323
33476599735731,3cyclictest655371-21kworker/1:0+events23:48:071
33476599734730,3cyclictest655371-21kworker/1:0+events23:40:201
33476599734730,3cyclictest349454-21kworker/1:2+events20:47:501
33476599733727,5cyclictest655371-21kworker/1:0+events00:20:201
33477199732729,2cyclictest461683-21kworker/3:2+events21:31:363
33477199731728,2cyclictest340656-21kworker/3:1+events19:18:463
33477199731728,2cyclictest340656-21kworker/3:1+events19:18:463
33476599730727,2cyclictest655371-21kworker/1:0+events23:38:561
33476599729726,2cyclictest655371-21kworker/1:0+events00:03:361
33476599729726,2cyclictest349454-21kworker/1:2+events19:30:221
33477199727723,3cyclictest423393-21kworker/3:1+events20:30:223
33476599727723,3cyclictest349454-21kworker/1:2+events19:48:271
33476599725721,3cyclictest349454-21kworker/1:2+events23:26:051
33476599723715,4cyclictest349454-21kworker/1:2+events20:38:481
33477199721718,2cyclictest461555-21turbostat20:54:553
33476599720716,3cyclictest349454-21kworker/1:2+events19:36:481
33477199719713,5cyclictest461683-21kworker/3:2+events21:21:133
33477199719713,5cyclictest461683-21kworker/3:2+events21:21:133
33476599718715,2cyclictest655371-21kworker/1:0+events23:30:211
33476599718715,2cyclictest349454-21kworker/1:2+events20:41:381
33476599718714,3cyclictest349454-21kworker/1:2+events19:41:371
33477199716713,2cyclictest630645-21turbostat23:14:543
33477199716712,3cyclictest461683-21kworker/3:2+events00:11:493
33476599716713,2cyclictest349454-21kworker/1:2+events23:23:331
33476599716713,2cyclictest349454-21kworker/1:2+events19:27:191
33476599716712,3cyclictest349454-21kworker/1:2+events19:58:261
33477199715707,6cyclictest367835-21kworker/3:2+events20:10:213
33476599715712,2cyclictest349454-21kworker/1:2+events20:00:231
33477199714711,2cyclictest367835-21kworker/3:2+events20:09:113
33477199712708,3cyclictest674341-21turbostat23:49:553
33477199711708,2cyclictest461683-21kworker/3:2+events22:33:243
33476599711708,2cyclictest349454-21kworker/1:2+events19:50:211
33476599709705,3cyclictest711691-21turbostat00:19:561
33477199707700,5cyclictest461683-21kworker/3:2+events23:57:133
33477199706701,4cyclictest461683-21kworker/3:2+events21:10:223
33477199706701,4cyclictest461683-21kworker/3:2+events21:10:223
33477199704701,2cyclictest429959-21turbostat20:29:563
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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