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2026-05-09 - 01:23

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 here to display the system's profile data or here to proceed to next system.
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 50 highest latencies:
System rack3slot6s.osadl.org (updated Fri May 08, 2026 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
11079211594,16sleep00-21swapper/007:09:320
10935211497,12sleep10-21swapper/107:07:411
10869211295,12sleep30-21swapper/307:06:513
11044211194,12sleep20-21swapper/207:09:062
2666321100,1sleep20-21swapper/210:19:552
149242770,1sleep3381ktimersoftd/311:17:243
252762760,1sleep10-21swapper/110:53:571
206112720,0sleep30-21swapper/310:48:343
177832720,1sleep00-21swapper/009:34:360
289302280,1sleep30-21swapper/307:51:013
280212220,0sleep00-21swapper/011:31:120
19422200,1sleep30-21swapper/309:51:553
1114599200,18cyclictest0-21swapper/112:00:101
1114599200,18cyclictest0-21swapper/108:00:101
1114599200,18cyclictest0-21swapper/107:45:111
1114499200,19cyclictest0-21swapper/007:40:100
104972180,3sleep01114499cyclictest11:47:550
11146991714,2cyclictest29229-21kworker/u8:110:28:042
1114699171,14cyclictest11637-21aten2.4-expect08:30:112
1114699171,14cyclictest0-21swapper/211:33:052
1114699170,2cyclictest0-21swapper/210:51:052
256472160,0sleep20-21swapper/207:45:112
1114799161,13cyclictest7817-21ssh12:20:143
11146991613,2cyclictest16771-21kworker/u8:007:30:042
1114699161,12cyclictest0-21swapper/208:20:142
1114699160,12cyclictest15491-21ssh11:53:322
11147991511,3cyclictest3076-21ssh11:05:103
1114799151,12cyclictest0-21swapper/310:30:133
1114799150,14cyclictest0-21swapper/307:15:103
1114699151,3cyclictest21589-21perl12:35:122
1114699151,3cyclictest0-21swapper/210:35:522
11146991512,2cyclictest3162-21kworker/u8:009:59:042
11146991512,2cyclictest23669-21kworker/u8:009:16:042
11146991512,2cyclictest21145-21kworker/u8:210:55:052
11146991512,2cyclictest21131-21kworker/u8:112:07:052
11146991512,2cyclictest12004-21kworker/u8:012:20:052
1114699151,12cyclictest11356-21apt-get07:10:102
1114699150,3cyclictest0-21swapper/211:55:172
1114699150,2cyclictest0-21swapper/212:02:052
1114699150,13cyclictest5462-21cat09:20:172
1114699150,11cyclictest0-21swapper/209:10:042
11145991511,2cyclictest0-21swapper/108:50:101
1114599150,3cyclictest26415-21diskstats11:30:131
1114599150,13cyclictest0-21swapper/111:11:021
11144991512,2cyclictest16783-21kworker/u8:011:37:050
240202141,2sleep20-21swapper/209:40:282
236692140,2sleep00-21swapper/010:51:090
1114799149,3cyclictest0-21swapper/311:35:133
1114799142,2cyclictest0-21swapper/310:25:543
1114799141,3cyclictest0-21swapper/311:44:393
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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