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2026-04-12 - 00:18

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 Sat Apr 11, 2026 12:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
178992321314,5sleep20-21swapper/207:09:492
175772319308,9sleep00-21swapper/007:05:390
176522318311,5sleep30-21swapper/307:06:383
176002315302,4sleep10-21swapper/107:05:551
18182993090,308cyclictest3244-21kworker/u16:2+efi_rts_wq09:10:123
18179993090,308cyclictest25189-21kworker/u16:0+efi_rts_wq10:50:130
18180993080,307cyclictest25189-21kworker/u16:0+efi_rts_wq11:45:131
18182993070,306cyclictest28985-21kworker/u16:3+efi_rts_wq07:17:353
18182993070,306cyclictest25189-21kworker/u16:0+efi_rts_wq12:10:133
18181993070,306cyclictest25189-21kworker/u16:0+efi_rts_wq11:40:122
18180993070,306cyclictest8963-21kworker/u16:0+efi_rts_wq08:12:451
18180993070,306cyclictest27667-21kworker/u16:2+efi_rts_wq12:08:291
18182993060,305cyclictest25189-21kworker/u16:0+efi_rts_wq12:33:343
18182993050,302cyclictest8963-21kworker/u16:0+efi_rts_wq09:25:133
18180993050,304cyclictest3244-21kworker/u16:2+efi_rts_wq08:17:461
18179993050,304cyclictest3244-21kworker/u16:2+efi_rts_wq10:20:120
18182993030,302cyclictest27667-21kworker/u16:2+efi_rts_wq12:28:333
18179993020,301cyclictest8963-21kworker/u16:0+efi_rts_wq08:00:150
18182993010,300cyclictest8963-21kworker/u16:0+efi_rts_wq10:25:153
18182993010,300cyclictest28985-21kworker/u16:3+efi_rts_wq07:30:133
18182993000,299cyclictest3244-21kworker/u16:2+efi_rts_wq10:30:133
18180993000,299cyclictest3244-21kworker/u16:2+efi_rts_wq07:52:411
18182992990,298cyclictest28985-21kworker/u16:3+efi_rts_wq07:27:373
18180992990,298cyclictest25189-21kworker/u16:0+efi_rts_wq10:50:131
18179992990,298cyclictest3244-21kworker/u16:2+efi_rts_wq09:22:590
18180992980,297cyclictest3244-21kworker/u16:2+efi_rts_wq10:10:131
18179992970,296cyclictest3244-21kworker/u16:2+efi_rts_wq10:28:100
18182992950,294cyclictest31055-21kworker/u16:3+efi_rts_wq11:20:143
18180992950,294cyclictest28985-21kworker/u16:3+efi_rts_wq07:15:121
18182992940,293cyclictest27667-21kworker/u16:2+efi_rts_wq12:38:343
18182992920,291cyclictest3244-21kworker/u16:2+efi_rts_wq09:17:583
18182992920,291cyclictest15488-21kworker/u16:2+efi_rts_wq11:35:123
18181992920,291cyclictest25189-21kworker/u16:0+efi_rts_wq11:23:202
18179992920,291cyclictest3244-21kworker/u16:2+efi_rts_wq10:45:130
18179992920,291cyclictest3244-21kworker/u16:2+efi_rts_wq10:15:130
18182992890,288cyclictest25189-21kworker/u16:0+efi_rts_wq11:10:123
18179992890,288cyclictest3244-21kworker/u16:2+efi_rts_wq09:15:130
18182992880,287cyclictest8963-21kworker/u16:0+efi_rts_wq09:30:123
18179992880,287cyclictest3244-21kworker/u16:2+efi_rts_wq07:47:400
18179992880,287cyclictest25189-21kworker/u16:0+efi_rts_wq12:25:120
18182992870,286cyclictest8963-21kworker/u16:0+efi_rts_wq09:00:133
18180992870,286cyclictest25189-21kworker/u16:0+efi_rts_wq11:40:121
18181992840,283cyclictest3244-21kworker/u16:2+efi_rts_wq08:05:142
18182992830,282cyclictest3244-21kworker/u16:2+efi_rts_wq10:23:083
18180992830,282cyclictest3244-21kworker/u16:2+efi_rts_wq08:20:151
18182992820,281cyclictest8963-21kworker/u16:0+efi_rts_wq08:15:133
18180992820,281cyclictest25003-21kworker/u16:1+efi_rts_wq11:58:271
18181992810,280cyclictest3244-21kworker/u16:2+efi_rts_wq10:15:132
18179992810,280cyclictest8963-21kworker/u16:0+efi_rts_wq07:55:140
18181992800,279cyclictest25189-21kworker/u16:0+efi_rts_wq11:45:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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