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2026-09-11 - 14:30

OSADL QA Farm on Real-time of Mainline Linux

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

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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackcslot3s.osadl.org (updated Fri Sep 11, 2026 00:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
56172316302,4sleep20-21swapper/219:08:452
55532315308,5sleep00-21swapper/019:07:560
46722315307,5sleep30-21swapper/319:05:263
53822313306,4sleep10-21swapper/119:05:451
5982993010,299cyclictest9940-21kworker/u16:2+efi_rts_wq23:15:163
5979992980,297cyclictest26742-21kworker/u16:2+efi_rts_wq20:30:130
5981992970,296cyclictest20123-21kworker/u16:0+efi_rts_wq20:05:142
5980992970,296cyclictest20123-21kworker/u16:0+efi_rts_wq19:44:361
5980992950,294cyclictest2400-21kworker/u16:1+efi_rts_wq23:00:121
5981992940,293cyclictest26742-21kworker/u16:2+efi_rts_wq21:19:542
5979992930,292cyclictest26742-21kworker/u16:2+efi_rts_wq22:25:130
5979992930,292cyclictest20123-21kworker/u16:0+efi_rts_wq19:39:350
5982992920,291cyclictest3216-21kworker/u16:1+efi_rts_wq22:30:123
5982992920,291cyclictest3216-21kworker/u16:1+efi_rts_wq22:20:123
5982992920,290cyclictest15023-21kworker/u16:0+efi_rts_wq00:20:133
5980992910,290cyclictest26742-21kworker/u16:2+efi_rts_wq21:45:131
5979992910,289cyclictest26742-21kworker/u16:2+efi_rts_wq20:20:120
5982992900,289cyclictest26742-21kworker/u16:2+efi_rts_wq20:15:153
5982992900,289cyclictest15023-21kworker/u16:0+efi_rts_wq00:15:113
5979992900,289cyclictest3216-21kworker/u16:1+efi_rts_wq21:44:580
5979992900,289cyclictest3216-21kworker/u16:1+efi_rts_wq20:45:120
5980992890,288cyclictest26742-21kworker/u16:2+efi_rts_wq22:05:031
5979992890,287cyclictest3216-21kworker/u16:1+efi_rts_wq21:15:140
5980992880,287cyclictest15023-21kworker/u16:0+efi_rts_wq00:15:271
5981992870,286cyclictest26742-21kworker/u16:2+efi_rts_wq21:45:122
5980992870,286cyclictest3721-21kworker/u16:1+efi_rts_wq00:10:161
5980992870,286cyclictest15023-21kworker/u16:0+efi_rts_wq00:30:131
5982992860,284cyclictest9940-21kworker/u16:2+efi_rts_wq23:45:123
5980992860,283cyclictest3216-21kworker/u16:1+efi_rts_wq22:15:121
5979992860,285cyclictest3216-21kworker/u16:1+efi_rts_wq22:20:050
5979992860,285cyclictest26742-21kworker/u16:2+efi_rts_wq19:30:110
5982992850,284cyclictest20123-21kworker/u16:0+efi_rts_wq19:55:123
5981992850,283cyclictest15023-21kworker/u16:0+efi_rts_wq00:00:142
5980992850,284cyclictest26742-21kworker/u16:2+efi_rts_wq20:50:131
5982992840,283cyclictest3216-21kworker/u16:1+efi_rts_wq21:55:113
5982992840,283cyclictest26742-21kworker/u16:2+efi_rts_wq21:05:143
5982992840,283cyclictest26742-21kworker/u16:2+efi_rts_wq21:05:133
5982992840,283cyclictest20123-21kworker/u16:0+efi_rts_wq19:50:123
5980992840,283cyclictest3216-21kworker/u16:1+efi_rts_wq21:35:141
5979992840,283cyclictest3216-21kworker/u16:1+efi_rts_wq21:20:140
5979992830,282cyclictest26742-21kworker/u16:2+efi_rts_wq22:05:140
5980992820,281cyclictest29366-21kworker/u16:3+efi_rts_wq22:45:141
5982992790,278cyclictest3216-21kworker/u16:1+efi_rts_wq21:25:123
5982992750,274cyclictest3721-21kworker/u16:1+efi_rts_wq00:35:323
5980992750,274cyclictest29366-21kworker/u16:3+efi_rts_wq23:10:121
5980992750,274cyclictest15023-21kworker/u16:0+efi_rts_wq23:30:151
5979992740,273cyclictest15023-21kworker/u16:0+efi_rts_wq23:15:100
5979992730,272cyclictest3216-21kworker/u16:1+efi_rts_wq20:55:130
5979992730,272cyclictest26742-21kworker/u16:2+efi_rts_wq22:15:040
5979992720,271cyclictest26742-21kworker/u16:2+efi_rts_wq20:35:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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