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2026-04-17 - 04:14

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 Apr 17, 2026 00:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
234032335313,5sleep00-21swapper/019:09:200
231612326303,5sleep10-21swapper/119:06:121
232842319311,5sleep30-21swapper/319:07:473
23723993160,313cyclictest32563-21kworker/u16:3+efi_rts_wq00:25:141
234172315308,5sleep20-21swapper/219:09:312
23725993140,313cyclictest32563-21kworker/u16:3+efi_rts_wq23:10:123
23723993140,313cyclictest6074-21kworker/u16:2+efi_rts_wq00:15:131
23723993140,313cyclictest32563-21kworker/u16:3+efi_rts_wq23:40:131
23723993140,313cyclictest10185-21kworker/u16:1+efi_rts_wq22:25:141
23725993130,312cyclictest10185-21kworker/u16:1+efi_rts_wq22:15:123
23723993130,312cyclictest18839-21kworker/u16:2+efi_rts_wq21:00:101
23723993120,311cyclictest3308-21kworker/u16:0+efi_rts_wq23:30:381
23722993120,311cyclictest10185-21kworker/u16:1+efi_rts_wq20:45:100
23722993120,310cyclictest32563-21kworker/u16:3+efi_rts_wq23:00:130
23723993100,309cyclictest10185-21kworker/u16:1+efi_rts_wq22:40:111
23725993090,308cyclictest18839-21kworker/u16:2+efi_rts_wq20:25:123
23722993080,307cyclictest18839-21kworker/u16:2+efi_rts_wq21:20:150
23725993070,306cyclictest18839-21kworker/u16:2+efi_rts_wq19:49:583
23723993070,306cyclictest18839-21kworker/u16:2+efi_rts_wq20:35:131
23722993070,306cyclictest32563-21kworker/u16:3+efi_rts_wq23:40:140
23725993060,305cyclictest10185-21kworker/u16:1+efi_rts_wq22:25:133
23725993030,302cyclictest18839-21kworker/u16:2+efi_rts_wq19:15:023
23725993010,300cyclictest18839-21kworker/u16:2+efi_rts_wq23:15:133
23723993010,300cyclictest32563-21kworker/u16:3+efi_rts_wq22:55:141
23723993010,300cyclictest18839-21kworker/u16:2+efi_rts_wq23:05:121
23723993010,300cyclictest18839-21kworker/u16:2+efi_rts_wq20:25:111
23723993000,299cyclictest18839-21kworker/u16:2+efi_rts_wq23:10:341
23723993000,299cyclictest10185-21kworker/u16:1+efi_rts_wq21:25:101
23723993000,298cyclictest32563-21kworker/u16:3+efi_rts_wq23:50:161
23722993000,299cyclictest3308-21kworker/u16:0+efi_rts_wq23:35:390
23724992990,297cyclictest18839-21kworker/u16:2+efi_rts_wq20:20:132
23723992990,298cyclictest6074-21kworker/u16:2+efi_rts_wq00:10:141
23722992970,296cyclictest10185-21kworker/u16:1+efi_rts_wq21:05:110
23722992950,294cyclictest18839-21kworker/u16:2+efi_rts_wq19:14:500
23725992930,292cyclictest3308-21kworker/u16:0+efi_rts_wq23:20:363
23723992930,292cyclictest10185-21kworker/u16:1+efi_rts_wq22:00:131
23723992930,292cyclictest10185-21kworker/u16:1+efi_rts_wq21:35:121
23724992920,291cyclictest18839-21kworker/u16:2+efi_rts_wq22:10:132
23723992920,291cyclictest18839-21kworker/u16:2+efi_rts_wq19:50:131
23722992920,291cyclictest6074-21kworker/u16:2+efi_rts_wq00:35:500
23725992910,290cyclictest18839-21kworker/u16:2+efi_rts_wq21:45:123
23723992900,288cyclictest32563-21kworker/u16:3+efi_rts_wq23:00:121
23723992890,288cyclictest18839-21kworker/u16:2+efi_rts_wq22:35:271
23725992880,287cyclictest10185-21kworker/u16:1+efi_rts_wq21:30:133
23725992870,286cyclictest18839-21kworker/u16:2+efi_rts_wq21:15:123
23725992870,286cyclictest10185-21kworker/u16:1+efi_rts_wq22:40:303
23724992860,285cyclictest32563-21kworker/u16:3+efi_rts_wq23:20:122
23722992860,285cyclictest10185-21kworker/u16:1+efi_rts_wq20:40:140
23725992850,284cyclictest21280-21kworker/u16:4+efi_rts_wq19:25:123
23724992850,284cyclictest10185-21kworker/u16:1+efi_rts_wq20:50:142
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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