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2026-08-05 - 06:34

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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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot6s.osadl.org (updated Wed Aug 05, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12880211794,18sleep00-21swapper/019:09:590
12101211392,16sleep20-21swapper/219:05:212
12800211194,12sleep30-21swapper/319:08:593
12023210380,16sleep10-21swapper/119:05:201
135912820,0sleep00-21swapper/019:10:150
238072810,0sleep10-21swapper/119:35:151
82832730,0sleep00-21swapper/023:00:400
311872730,1sleep2301ktimersoftd/222:17:292
123272710,1sleep10-21swapper/121:58:281
227482700,0sleep20-21swapper/221:35:342
162362320,0sleep20-21swapper/223:09:482
136802310,1sleep1221ktimersoftd/123:40:151
221782260,0sleep00-21swapper/000:22:290
215322230,1sleep20-21swapper/223:15:152
1290999230,17cyclictest0-21swapper/200:02:052
12909992117,2cyclictest0-21swapper/219:55:122
1290999211,16cyclictest0-21swapper/219:24:052
1290999210,4cyclictest0-21swapper/220:14:042
1290999210,19cyclictest0-21swapper/222:55:132
1291099201,2cyclictest29008-21diskmemload22:20:163
12909992017,2cyclictest31565-21kworker/u8:000:12:042
12909992017,2cyclictest31349-21kworker/u8:021:49:052
12909992017,2cyclictest24247-21kworker/u8:200:38:012
1290999200,5cyclictest0-21swapper/220:25:042
1290999200,4cyclictest0-21swapper/219:52:012
12908992017,2cyclictest31349-21kworker/u8:022:03:051
1290799200,18cyclictest0-21swapper/022:55:130
1291099191,16cyclictest0-21swapper/322:25:123
12909991916,2cyclictest7071-21kworker/u8:123:04:052
12909991916,2cyclictest31695-21kworker/u8:222:42:062
12909991916,2cyclictest31695-21kworker/u8:222:42:052
12909991916,2cyclictest31565-21kworker/u8:000:23:042
12909991916,2cyclictest31349-21kworker/u8:022:22:062
12909991916,2cyclictest2363-21kworker/u8:023:33:042
1290999190,3cyclictest0-21swapper/223:52:052
1290999190,3cyclictest0-21swapper/220:42:042
1290799190,17cyclictest0-21swapper/022:15:110
12909991815,2cyclictest31695-21kworker/u8:222:28:012
12909991815,2cyclictest26463-21kworker/u8:122:50:052
12909991815,2cyclictest15855-21kworker/u8:223:45:042
12908991815,2cyclictest573-21kworker/u8:223:13:041
173382170,0sleep30-21swapper/323:44:293
12910991713,2cyclictest29184-21sort23:56:033
12909991714,2cyclictest4746-21kworker/u8:321:24:052
12909991714,2cyclictest2529-21kworker/u8:020:20:052
12909991714,2cyclictest2529-21kworker/u8:020:08:042
12909991714,2cyclictest13255-21kworker/u8:022:47:042
12909991714,2cyclictest13255-21kworker/u8:022:47:042
1290999171,12cyclictest27821-21kworker/2:219:11:042
1290999170,4cyclictest0-21swapper/219:19:042
1290999170,2cyclictest0-21swapper/223:14:042
1290999170,2cyclictest0-21swapper/222:07:042
35052160,1sleep30-21swapper/300:36:353
12909991613,2cyclictest7842-21kworker/u8:221:59:042
12909991613,2cyclictest5572-21kworker/u8:122:30:042
12909991613,2cyclictest4746-21kworker/u8:321:31:042
12909991613,2cyclictest31565-21kworker/u8:000:08:042
12909991613,2cyclictest24744-21kworker/u8:119:44:042
12909991613,2cyclictest24247-21kworker/u8:200:27:052
12909991613,2cyclictest24172-21kworker/u8:323:23:042
12909991613,2cyclictest23281-21kworker/u8:021:09:042
12909991613,2cyclictest14842-21kworker/u8:219:35:042
12909991613,2cyclictest13548-21kworker/u8:122:00:052
12909991613,2cyclictest10689-21kworker/u8:120:35:042
1290999161,13cyclictest0-21swapper/200:15:172
12908991613,2cyclictest573-21kworker/u8:223:02:021
12908991613,2cyclictest4746-21kworker/u8:321:42:051
12908991613,2cyclictest4746-21kworker/u8:321:22:051
12908991613,2cyclictest25716-21kworker/u8:323:56:041
12908991613,2cyclictest2363-21kworker/u8:023:31:041
12908991612,2cyclictest29008-21diskmemload00:12:041
1290799160,14cyclictest0-21swapper/022:35:170
12910991512,2cyclictest0-21swapper/322:35:583
12910991511,2cyclictest15468-21processes00:15:193
12910991510,3cyclictest3073-21ssh21:49:303
1291099150,13cyclictest0-21swapper/319:25:183
1290999152,7cyclictest0-21swapper/221:15:012
12909991512,2cyclictest8482-21kworker/u8:123:38:042
12909991512,2cyclictest31349-21kworker/u8:021:50:042
12909991512,2cyclictest24744-21kworker/u8:120:00:042
12909991512,2cyclictest23281-21kworker/u8:020:56:052
12909991512,2cyclictest14842-21kworker/u8:219:47:052
12909991512,2cyclictest14842-21kworker/u8:219:32:052
1290999150,13cyclictest0-21swapper/222:10:162
12908991512,2cyclictest31695-21kworker/u8:222:20:041
12908991512,2cyclictest11820-21kworker/u8:121:27:041
12908991510,3cyclictest0-21swapper/120:45:131
1290899150,2cyclictest0-21swapper/120:25:041
1290899150,13cyclictest0-21swapper/119:25:151
1290799151,12cyclictest13850-21ssh23:06:090
12907991510,3cyclictest27779-21ssh23:55:140
1290799150,13cyclictest0-21swapper/022:40:130
1290799150,13cyclictest0-21swapper/022:40:130
1291099142,6cyclictest0-21swapper/320:00:013
1291099142,2cyclictest0-21swapper/300:14:233
1291099141,2cyclictest29008-21diskmemload23:36:093
12910991411,2cyclictest381ktimersoftd/323:15:333
12910991411,2cyclictest0-21swapper/323:33:093
1291099141,11cyclictest381ktimersoftd/322:46:513
1291099141,11cyclictest381ktimersoftd/322:46:503
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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