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2026-08-18 - 09:01

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 Tue Aug 18, 2026 00:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
120382335313,4sleep00-21swapper/019:06:420
119782316308,5sleep20-21swapper/219:05:562
120312315307,5sleep30-21swapper/319:06:363
119622315308,5sleep10-21swapper/119:05:431
12563993020,301cyclictest13736-21kworker/u16:2+efi_rts_wq23:40:313
12560993020,300cyclictest21315-21kworker/u16:3+efi_rts_wq23:20:130
12562992990,296cyclictest11943-21kworker/u16:2+efi_rts_wq22:30:142
12563992980,297cyclictest11943-21kworker/u16:2+efi_rts_wq19:10:143
12563992980,296cyclictest11943-21kworker/u16:2+efi_rts_wq20:20:143
12562992970,296cyclictest13736-21kworker/u16:2+efi_rts_wq23:55:132
12561992940,293cyclictest11943-21kworker/u16:2+efi_rts_wq19:10:131
12563992930,292cyclictest11943-21kworker/u16:2+efi_rts_wq21:20:143
12561992930,292cyclictest29103-21kworker/u16:0+efi_rts_wq21:15:131
12561992920,291cyclictest21315-21kworker/u16:3+efi_rts_wq00:05:161
12560992910,290cyclictest13736-21kworker/u16:2+efi_rts_wq23:45:120
12563992880,287cyclictest11943-21kworker/u16:2+efi_rts_wq22:25:133
12560992880,286cyclictest3420-21kworker/u16:3+efi_rts_wq22:50:140
12561992860,285cyclictest29103-21kworker/u16:0+efi_rts_wq20:35:121
12563992850,284cyclictest13736-21kworker/u16:2+efi_rts_wq23:45:123
12562992850,284cyclictest31704-21kworker/u16:1+efi_rts_wq22:50:142
12560992850,284cyclictest13736-21kworker/u16:2+efi_rts_wq00:00:110
12560992840,282cyclictest11943-21kworker/u16:2+efi_rts_wq19:35:130
12563992830,282cyclictest29103-21kworker/u16:0+efi_rts_wq19:55:143
12563992830,282cyclictest21315-21kworker/u16:3+efi_rts_wq00:35:403
12561992820,281cyclictest21315-21kworker/u16:3+efi_rts_wq00:35:131
12561992820,281cyclictest11943-21kworker/u16:2+efi_rts_wq22:15:151
12563992810,280cyclictest29103-21kworker/u16:0+efi_rts_wq21:15:143
12563992810,280cyclictest13736-21kworker/u16:2+efi_rts_wq00:25:143
12562992810,280cyclictest29103-21kworker/u16:0+efi_rts_wq20:55:142
12561992810,280cyclictest29103-21kworker/u16:0+efi_rts_wq21:45:131
12561992810,280cyclictest11943-21kworker/u16:2+efi_rts_wq22:30:141
12561992810,280cyclictest11943-21kworker/u16:2+efi_rts_wq19:15:121
12563992800,279cyclictest29103-21kworker/u16:0+efi_rts_wq20:30:143
12562992790,278cyclictest21315-21kworker/u16:3+efi_rts_wq00:00:352
12561992780,277cyclictest13736-21kworker/u16:2+efi_rts_wq23:25:141
12563992770,276cyclictest11943-21kworker/u16:2+efi_rts_wq20:15:143
12562992740,273cyclictest21315-21kworker/u16:3+efi_rts_wq23:35:292
12560992740,273cyclictest3420-21kworker/u16:3+efi_rts_wq22:45:140
12562992730,272cyclictest3420-21kworker/u16:3+efi_rts_wq22:55:232
12562992720,271cyclictest11943-21kworker/u16:2+efi_rts_wq19:50:122
12562992720,271cyclictest11943-21kworker/u16:2+efi_rts_wq19:50:122
12560992720,271cyclictest3420-21kworker/u16:3+efi_rts_wq22:40:210
12563992710,270cyclictest11943-21kworker/u16:2+efi_rts_wq21:10:103
12561992700,269cyclictest13736-21kworker/u16:2+efi_rts_wq23:30:301
12560992700,269cyclictest21315-21kworker/u16:3+efi_rts_wq00:10:120
12562992690,268cyclictest11943-21kworker/u16:2+efi_rts_wq20:40:142
12560992690,268cyclictest11943-21kworker/u16:2+efi_rts_wq21:30:080
12563992680,264cyclictest29103-21kworker/u16:0+efi_rts_wq22:05:123
12563992650,263cyclictest29103-21kworker/u16:0+efi_rts_wq19:25:153
12560992650,264cyclictest31704-21kworker/u16:1+efi_rts_wq23:00:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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