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2026-08-24 - 10:37

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 Mon Aug 24, 2026 00:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
209162318304,5sleep10-21swapper/119:08:401
208212317311,4sleep30-21swapper/319:07:253
208002316308,5sleep00-21swapper/019:07:100
208552315307,5sleep20-21swapper/219:07:522
21286993000,299cyclictest22739-21kworker/u16:0+efi_rts_wq21:00:121
21286992990,298cyclictest4005-21kworker/u16:2+efi_rts_wq19:45:131
21286992990,298cyclictest14732-21kworker/u16:3+efi_rts_wq19:10:121
21285992990,298cyclictest14732-21kworker/u16:3+efi_rts_wq19:10:110
21285992970,296cyclictest30421-21kworker/u16:2+efi_rts_wq00:31:120
21287992950,294cyclictest4005-21kworker/u16:2+efi_rts_wq19:45:132
21286992940,293cyclictest27819-21kworker/u16:1+efi_rts_wq20:25:121
21286992940,293cyclictest24349-21kworker/u16:2+efi_rts_wq22:09:451
21286992930,292cyclictest20176-21kworker/u16:2+efi_rts_wq23:05:121
21288992920,291cyclictest11816-21kworker/u16:1+efi_rts_wq00:05:133
21285992910,290cyclictest14732-21kworker/u16:3+efi_rts_wq20:00:120
21287992890,288cyclictest22739-21kworker/u16:0+efi_rts_wq21:05:112
21287992870,286cyclictest22739-21kworker/u16:0+efi_rts_wq21:29:372
21287992860,285cyclictest24349-21kworker/u16:2+efi_rts_wq22:24:492
21286992860,285cyclictest30421-21kworker/u16:2+efi_rts_wq00:15:131
21286992850,284cyclictest19839-21kworker/u16:1+efi_rts_wq22:10:131
21285992850,283cyclictest10938-21kworker/u16:1+efi_rts_wq22:55:150
21288992830,282cyclictest20176-21kworker/u16:2+efi_rts_wq23:05:123
21285992830,282cyclictest22739-21kworker/u16:0+efi_rts_wq20:49:290
21285992830,282cyclictest19088-21kworker/u16:3+efi_rts_wq00:00:130
21285992830,282cyclictest14732-21kworker/u16:3+efi_rts_wq20:05:130
21285992830,282cyclictest14732-21kworker/u16:3+efi_rts_wq19:20:130
21286992820,281cyclictest11816-21kworker/u16:1+efi_rts_wq00:10:141
21288992810,280cyclictest3601-21kworker/u16:0+efi_rts_wq19:30:143
21286992810,280cyclictest14732-21kworker/u16:3+efi_rts_wq19:19:121
21288992800,279cyclictest30421-21kworker/u16:2+efi_rts_wq23:30:153
21287992800,279cyclictest24349-21kworker/u16:2+efi_rts_wq21:55:122
21287992790,278cyclictest14732-21kworker/u16:3+efi_rts_wq19:20:132
21286992790,278cyclictest14732-21kworker/u16:3+efi_rts_wq21:49:411
21285992790,278cyclictest24349-21kworker/u16:2+efi_rts_wq22:20:130
21285992790,278cyclictest22739-21kworker/u16:0+efi_rts_wq21:00:120
21285992790,278cyclictest14732-21kworker/u16:3+efi_rts_wq21:30:140
21285992790,278cyclictest14732-21kworker/u16:3+efi_rts_wq20:20:130
21285992770,276cyclictest19839-21kworker/u16:1+efi_rts_wq22:05:130
21287992760,275cyclictest8477-21kworker/u16:0+efi_rts_wq22:45:132
21286992750,274cyclictest30421-21kworker/u16:2+efi_rts_wq23:56:051
21285992750,274cyclictest30421-21kworker/u16:2+efi_rts_wq00:20:130
21286992730,272cyclictest19839-21kworker/u16:1+efi_rts_wq21:44:411
21285992730,272cyclictest22739-21kworker/u16:0+efi_rts_wq21:05:110
21287992720,271cyclictest30421-21kworker/u16:2+efi_rts_wq23:40:112
21287992690,265cyclictest27823-21kworker/u16:3+efi_rts_wq23:10:132
21287992670,265cyclictest8477-21kworker/u16:0+efi_rts_wq22:35:122
21285992670,266cyclictest30421-21kworker/u16:2+efi_rts_wq00:06:070
21286992660,265cyclictest30421-21kworker/u16:2+efi_rts_wq23:20:141
21285992660,265cyclictest10938-21kworker/u16:1+efi_rts_wq23:00:130
21288992650,264cyclictest27823-21kworker/u16:3+efi_rts_wq23:45:113
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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