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2026-04-17 - 15:51

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 Fri Apr 17, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13424211593,15sleep00-21swapper/007:06:030
13557211497,12sleep30-21swapper/307:07:023
136482113102,6sleep20-21swapper/207:08:132
13607211094,11sleep10-21swapper/107:07:401
107082820,0sleep30-21swapper/311:36:033
322272720,1sleep332235-21latency11:25:163
263362620,1sleep00-21swapper/010:12:030
141622350,4sleep1221ktimersoftd/111:40:141
1381699340,2cyclictest0-21swapper/008:35:120
1381699340,2cyclictest0-21swapper/008:35:120
145682260,0sleep30-21swapper/312:14:583
1381699260,24cyclictest0-21swapper/008:55:120
1381899250,2cyclictest0-21swapper/208:35:122
1381899250,2cyclictest0-21swapper/208:35:122
212742240,1sleep30-21swapper/311:47:303
288552230,1sleep30-21swapper/312:29:503
13816992320,2cyclictest28540-21ssh10:15:110
1381899222,18cyclictest0-21swapper/207:50:112
13819992118,2cyclictest25194-21kworker/u8:207:47:043
13819992115,5cyclictest0-21swapper/310:22:043
1381999211,18cyclictest25207-21ssh10:45:103
1381999210,5cyclictest0-21swapper/312:31:043
1381999210,16cyclictest0-21swapper/309:46:043
1381899210,19cyclictest0-21swapper/208:55:132
13819992017,2cyclictest8536-21kworker/u8:111:12:043
13819992017,2cyclictest8536-21kworker/u8:111:01:043
13819992017,2cyclictest842-21kworker/u8:110:40:043
13819992017,2cyclictest842-21kworker/u8:110:26:053
13819992017,2cyclictest8332-21kworker/u8:008:22:043
13819992017,2cyclictest8332-21kworker/u8:008:17:043
13819992017,2cyclictest30482-21kworker/u8:111:24:043
13819992017,2cyclictest28619-21kworker/u8:110:52:013
13819992017,2cyclictest24078-21kworker/u8:109:19:043
13819992017,2cyclictest22402-21kworker/u8:109:36:043
13819992017,2cyclictest21993-21kworker/u8:208:49:043
13819992017,2cyclictest21776-21kworker/u8:210:57:043
13819992017,2cyclictest21776-21kworker/u8:210:39:043
13819992017,2cyclictest21776-21kworker/u8:210:32:043
13819992017,2cyclictest20240-21kworker/u8:107:41:043
13819992017,2cyclictest20171-21kworker/u8:011:18:053
13819992017,2cyclictest15574-21kworker/u8:010:07:043
13819992017,2cyclictest14388-21kworker/u8:008:32:043
13819992017,2cyclictest14388-21kworker/u8:008:32:043
13819992017,2cyclictest11427-21kworker/u8:009:43:043
13819992017,2cyclictest11427-21kworker/u8:009:27:043
13818992017,2cyclictest20171-21kworker/u8:011:53:042
1381799200,2cyclictest0-21swapper/108:05:101
1381699200,2cyclictest0-21swapper/010:55:100
13819991916,2cyclictest8332-21kworker/u8:008:25:043
13819991916,2cyclictest27187-21kworker/u8:010:19:043
13819991916,2cyclictest27187-21kworker/u8:010:14:043
13819991916,2cyclictest20171-21kworker/u8:011:56:043
13819991916,2cyclictest20171-21kworker/u8:011:54:043
13819991916,2cyclictest1992-21kworker/u8:212:08:043
13819991916,2cyclictest1992-21kworker/u8:212:08:043
13819991916,2cyclictest18133-21kworker/u8:007:25:043
13819991916,2cyclictest13555-21kworker/u8:107:10:013
13818991916,2cyclictest11427-21kworker/u8:009:49:042
13819991815,2cyclictest9482-21kworker/u8:111:42:013
13819991815,2cyclictest7913-21kworker/u8:209:56:013
13819991815,2cyclictest3170-21kworker/u8:211:34:013
13819991815,2cyclictest21993-21kworker/u8:209:01:043
13819991815,2cyclictest20240-21kworker/u8:107:35:043
13819991815,2cyclictest1965-21kworker/u8:208:09:043
13819991815,2cyclictest18133-21kworker/u8:007:22:043
13819991815,2cyclictest16328-21kworker/u8:209:34:043
1381999180,2cyclictest0-21swapper/308:13:043
13818991815,2cyclictest24078-21kworker/u8:109:25:042
13818991815,2cyclictest23265-21kworker/u8:111:58:042
1381899180,2cyclictest0-21swapper/210:08:042
1381799180,16cyclictest0-21swapper/110:45:101
1381799180,16cyclictest0-21swapper/110:35:091
1381699180,16cyclictest0-21swapper/010:35:090
13819991714,2cyclictest25194-21kworker/u8:207:32:043
13819991714,2cyclictest24078-21kworker/u8:109:10:043
13819991714,2cyclictest21993-21kworker/u8:208:56:043
13819991714,2cyclictest11427-21kworker/u8:009:50:043
13819991711,4cyclictest21105-21ssh12:20:463
13818991714,2cyclictest8843-21kworker/u8:112:36:042
13818991714,2cyclictest842-21kworker/u8:110:28:042
13818991714,2cyclictest22402-21kworker/u8:109:59:042
13818991714,2cyclictest21776-21kworker/u8:210:56:042
13818991714,2cyclictest20240-21kworker/u8:107:44:012
13818991714,2cyclictest1992-21kworker/u8:212:01:042
13818991714,2cyclictest11427-21kworker/u8:009:38:042
1381899170,2cyclictest30182-21diskmemload12:31:042
1381799176,7cyclictest0-21swapper/109:44:051
290072160,0sleep10-21swapper/111:55:171
13819991613,2cyclictest31954-21kworker/u8:107:54:043
13819991613,2cyclictest14388-21kworker/u8:008:37:043
13819991613,2cyclictest14388-21kworker/u8:008:37:043
1381999160,2cyclictest0-21swapper/308:53:043
1381999160,2cyclictest0-21swapper/308:03:043
13818991613,2cyclictest8843-21kworker/u8:112:15:042
13818991613,2cyclictest21776-21kworker/u8:210:36:042
13818991613,2cyclictest21776-21kworker/u8:210:10:042
13818991613,2cyclictest20171-21kworker/u8:012:28:052
13818991613,2cyclictest20171-21kworker/u8:011:23:042
13818991613,2cyclictest15574-21kworker/u8:010:04:012
13818991613,2cyclictest11427-21kworker/u8:009:24:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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