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2026-05-12 - 01:40

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 Mon May 11, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22300211693,18sleep10-21swapper/107:09:011
222922115104,6sleep30-21swapper/307:08:543
221352115104,6sleep00-21swapper/007:06:520
21629210689,12sleep20-21swapper/207:05:372
95752740,0sleep00-21swapper/009:12:230
147562670,1sleep20-21swapper/211:38:542
304172220,1sleep0101ktimersoftd/010:10:150
22408992118,2cyclictest17335-21kworker/u8:011:22:050
22408992118,2cyclictest17335-21kworker/u8:011:22:050
2241099200,18cyclictest0-21swapper/207:25:112
2240899193,2cyclictest29992-21munin-node0
2241099183,13cyclictest30742-21latency_hist08:50:012
22408991815,2cyclictest17335-21kworker/u8:011:19:050
22408991815,2cyclictest13756-21kworker/u8:210:30:040
2240899180,16cyclictest0-21swapper/007:25:110
22411991714,2cyclictest12627-21kworker/u8:209:35:053
22411991713,2cyclictest1063-21kworker/u8:110:07:053
22409991714,2cyclictest17335-21kworker/u8:011:21:051
22409991714,2cyclictest17335-21kworker/u8:011:21:051
22409991714,2cyclictest13942-21kworker/u8:312:15:051
2240999170,2cyclictest0-21swapper/110:07:041
2240999170,2cyclictest0-21swapper/109:35:051
22408991714,2cyclictest13800-21kworker/u8:310:41:050
2240899171,3cyclictest0-21swapper/010:00:170
2240899170,15cyclictest0-21swapper/011:48:480
2241199160,14cyclictest0-21swapper/311:28:213
2241099161,13cyclictest24292-21ssh09:28:442
22410991611,3cyclictest1966-21grep08:56:042
2241099161,13cyclictest0-21swapper/211:19:182
2240999161,13cyclictest0-21swapper/111:02:051
2240999161,13cyclictest0-21swapper/108:15:131
22408991613,2cyclictest4663-21kworker/u8:010:54:050
22408991613,2cyclictest22083-21kworker/u8:107:38:010
22408991613,2cyclictest1063-21kworker/u8:110:24:040
22411991512,2cyclictest32133-21kworker/u8:210:47:053
2241099151,12cyclictest15749-21apt-get09:20:072
2241099151,12cyclictest14768-21ssh09:53:152
22410991510,3cyclictest29148-21ssh12:30:132
22410991510,3cyclictest0-21swapper/211:20:172
22410991510,3cyclictest0-21swapper/211:20:172
2241099150,13cyclictest6564-21sed09:10:012
2241099150,13cyclictest0-21swapper/211:53:202
2240999151,3cyclictest7813-21ssh09:10:181
22409991512,2cyclictest495-21kworker/u8:111:26:051
22409991512,2cyclictest27225-21kworker/u8:111:15:041
22409991512,2cyclictest22760-21kworker/u8:111:50:051
22409991512,2cyclictest12627-21kworker/u8:209:33:051
22409991512,2cyclictest0-21swapper/111:35:241
22409991512,2cyclictest0-21swapper/108:50:051
2240999151,12cyclictest0-21swapper/111:56:041
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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