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2026-07-02 - 21:49

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, slot #6

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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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot6s.osadl.org (updated Thu Jul 02, 2026 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25812125100,20sleep00-21swapper/007:08:570
19322116104,6sleep10-21swapper/107:05:491
25842112101,6sleep30-21swapper/307:08:593
903621080,1sleep1269699cyclictest08:42:591
2658210795,6sleep20-21swapper/207:09:552
197062850,1sleep30-21swapper/309:45:133
204662790,0sleep00-21swapper/009:45:180
217962620,1sleep30-21swapper/309:11:343
269799310,30cyclictest0-21swapper/207:10:102
269599251,22cyclictest14171-21ssh12:35:130
269799242,17cyclictest0-21swapper/209:12:042
269699240,13cyclictest0-21swapper/111:45:121
2695992417,3cyclictest0-21swapper/012:00:100
269699232,20cyclictest0-21swapper/109:00:011
221392230,0sleep10-21swapper/112:08:161
2698992217,3cyclictest14654-21ssh11:25:103
269799220,17cyclictest0-21swapper/211:02:042
269899211,18cyclictest15061-21ssh09:40:123
269899210,19cyclictest0-21swapper/311:45:113
269899210,19cyclictest0-21swapper/309:50:113
269799210,19cyclictest0-21swapper/212:00:102
269599210,19cyclictest0-21swapper/008:25:120
269599210,19cyclictest0-21swapper/007:45:110
269899200,18cyclictest0-21swapper/307:40:123
2697992017,2cyclictest32680-21kworker/u8:108:22:052
2697992017,2cyclictest31975-21kworker/u8:010:13:042
2697992017,2cyclictest28578-21kworker/u8:208:28:042
2697992017,2cyclictest22927-21kworker/u8:211:34:062
2697992017,2cyclictest17859-21kworker/u8:012:21:052
2697992017,2cyclictest15013-21kworker/u8:011:06:052
2697991916,2cyclictest6978-21kworker/u8:209:02:012
2697991916,2cyclictest4708-21kworker/u8:207:26:052
2697991916,2cyclictest25564-21kworker/u8:008:17:042
2697991916,2cyclictest18726-21kworker/u8:109:52:052
2697991916,2cyclictest18726-21kworker/u8:109:47:042
2697991916,2cyclictest17859-21kworker/u8:012:13:042
2697991916,2cyclictest17516-21kworker/u8:207:56:052
2697991916,2cyclictest17516-21kworker/u8:207:47:042
2697991916,2cyclictest12173-21kworker/u8:211:58:052
2697991916,2cyclictest1038-21kworker/u8:107:52:042
269799191,2cyclictest0-21swapper/212:26:042
2696991916,2cyclictest7199-21kworker/u8:110:10:041
2696991916,2cyclictest6977-21kworker/u8:210:44:041
2696991916,2cyclictest16982-21kworker/u8:009:17:041
269599191,16cyclictest0-21swapper/009:10:120
269799182,14cyclictest0-21swapper/209:16:012
2697991815,2cyclictest7692-21kworker/u8:211:20:022
2697991815,2cyclictest7692-21kworker/u8:211:17:042
2697991815,2cyclictest6978-21kworker/u8:209:09:052
2697991815,2cyclictest3601-21kworker/u8:309:27:042
2697991815,2cyclictest10433-21kworker/u8:009:40:052
2697991815,2cyclictest1038-21kworker/u8:108:00:042
269799180,2cyclictest0-21swapper/210:27:042
269799180,13cyclictest0-21swapper/211:46:052
2696991815,2cyclictest28362-21kworker/u8:112:10:051
2696991815,2cyclictest25249-21kworker/u8:209:31:041
2697991714,2cyclictest32074-21kworker/u8:110:51:042
269799171,2cyclictest0-21swapper/209:56:042
269799170,2cyclictest0-21swapper/207:21:042
269799170,16cyclictest0-21swapper/207:39:042
2696991714,2cyclictest7692-21kworker/u8:211:18:011
2696991714,2cyclictest4708-21kworker/u8:207:25:041
2696991714,2cyclictest32074-21kworker/u8:110:54:051
2696991714,2cyclictest31975-21kworker/u8:010:15:041
2696991714,2cyclictest28578-21kworker/u8:208:12:041
2696991714,2cyclictest22927-21kworker/u8:211:38:041
2696991714,2cyclictest14271-21kworker/u8:112:39:051
269699170,12cyclictest0-21swapper/111:13:041
269899161,12cyclictest0-21swapper/309:21:233
269799162,2cyclictest0-21swapper/210:45:042
269799162,2cyclictest0-21swapper/210:20:122
2697991611,3cyclictest13107-21ssh12:33:462
2696991613,2cyclictest9120-21kworker/u8:008:54:041
2696991613,2cyclictest6978-21kworker/u8:208:48:021
2696991613,2cyclictest6586-21kworker/u8:011:56:051
2696991613,2cyclictest4708-21kworker/u8:207:36:011
2696991613,2cyclictest4708-21kworker/u8:207:24:041
2696991613,2cyclictest3601-21kworker/u8:309:29:041
2696991613,2cyclictest32680-21kworker/u8:108:33:051
2696991613,2cyclictest31975-21kworker/u8:010:00:051
2696991613,2cyclictest30620-21kworker/u8:112:25:041
2696991613,2cyclictest30620-21kworker/u8:112:20:051
2696991613,2cyclictest27137-21kworker/u8:010:36:041
2696991613,2cyclictest25249-21kworker/u8:209:35:041
2696991613,2cyclictest25249-21kworker/u8:209:35:041
2696991613,2cyclictest17704-21kworker/u8:111:30:041
2696991613,2cyclictest17516-21kworker/u8:208:04:041
2696991613,2cyclictest15013-21kworker/u8:011:00:041
2696991613,2cyclictest14564-21kworker/u8:108:57:051
2696991613,2cyclictest1038-21kworker/u8:107:49:041
2696991613,2cyclictest1038-21kworker/u8:107:16:021
269599161,3cyclictest0-21swapper/011:40:130
2695991611,3cyclictest0-21swapper/011:00:160
269899150,3cyclictest1241-21tr10:00:103
269899150,13cyclictest0-21swapper/311:04:003
269799153,2cyclictest0-21swapper/212:36:022
2697991512,2cyclictest25564-21kworker/u8:008:08:062
269799150,2cyclictest0-21swapper/209:33:052
269799150,11cyclictest0-21swapper/211:41:042
269799150,10cyclictest0-21swapper/210:57:052
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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