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2026-04-20 - 15:37

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 100 highest latencies:
System rackcslot3s.osadl.org (updated Mon Apr 20, 2026 12:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
292092326320,4sleep20-21swapper/207:08:052
293462320306,5sleep30-21swapper/307:09:503
292402320306,5sleep10-21swapper/107:08:281
293382317303,5sleep00-21swapper/007:09:420
29627993120,311cyclictest31979-21kworker/u16:3+efi_rts_wq07:20:123
29627993120,310cyclictest20967-21kworker/u16:4+efi_rts_wq10:30:113
29626993120,311cyclictest12105-21kworker/u16:0+efi_rts_wq07:15:132
29624993120,310cyclictest21313-21kworker/u16:0+efi_rts_wq11:28:200
29627993100,309cyclictest31979-21kworker/u16:3+efi_rts_wq09:20:143
29625993100,309cyclictest20967-21kworker/u16:4+efi_rts_wq08:25:121
29627993090,308cyclictest20967-21kworker/u16:4+efi_rts_wq11:50:123
29625993090,308cyclictest20967-21kworker/u16:4+efi_rts_wq09:55:131
29624993090,308cyclictest12105-21kworker/u16:0+efi_rts_wq07:15:000
29624993090,307cyclictest31979-21kworker/u16:3+efi_rts_wq08:50:130
29625993080,307cyclictest20967-21kworker/u16:4+efi_rts_wq11:05:121
29627993070,306cyclictest20967-21kworker/u16:4+efi_rts_wq08:00:133
29627993060,305cyclictest31979-21kworker/u16:3+efi_rts_wq08:45:143
29625993060,305cyclictest31979-21kworker/u16:3+efi_rts_wq09:00:111
29627993050,304cyclictest20967-21kworker/u16:4+efi_rts_wq10:55:133
29627993050,304cyclictest20967-21kworker/u16:4+efi_rts_wq08:25:133
29626993050,304cyclictest20967-21kworker/u16:4+efi_rts_wq12:13:272
29626993050,304cyclictest20967-21kworker/u16:4+efi_rts_wq09:15:132
29625993030,302cyclictest20967-21kworker/u16:4+efi_rts_wq09:50:141
29624993030,301cyclictest20967-21kworker/u16:4+efi_rts_wq10:48:130
29625993010,300cyclictest31979-21kworker/u16:3+efi_rts_wq10:05:141
29626993000,299cyclictest20967-21kworker/u16:4+efi_rts_wq08:22:462
29626992990,298cyclictest21313-21kworker/u16:0+efi_rts_wq11:25:122
29624992990,298cyclictest31979-21kworker/u16:3+efi_rts_wq09:40:130
29625992980,297cyclictest12105-21kworker/u16:0+efi_rts_wq07:55:131
29624992980,297cyclictest20967-21kworker/u16:4+efi_rts_wq12:35:140
29627992970,296cyclictest20967-21kworker/u16:4+efi_rts_wq12:10:123
29625992970,296cyclictest31979-21kworker/u16:3+efi_rts_wq09:20:141
29627992950,294cyclictest31979-21kworker/u16:3+efi_rts_wq10:13:093
29627992950,293cyclictest4320-21kworker/u16:2+efi_rts_wq11:10:133
29626992950,294cyclictest20967-21kworker/u16:4+efi_rts_wq12:05:112
29625992950,294cyclictest20967-21kworker/u16:4+efi_rts_wq12:25:121
29624992940,293cyclictest20967-21kworker/u16:4+efi_rts_wq08:17:460
29627992930,292cyclictest31979-21kworker/u16:3+efi_rts_wq10:08:073
29627992930,292cyclictest31979-21kworker/u16:3+efi_rts_wq07:30:133
29627992910,290cyclictest20967-21kworker/u16:4+efi_rts_wq11:30:123
29626992900,289cyclictest31979-21kworker/u16:3+efi_rts_wq08:50:132
29626992900,289cyclictest21313-21kworker/u16:0+efi_rts_wq12:00:132
29625992890,288cyclictest20967-21kworker/u16:4+efi_rts_wq12:30:141
29626992880,287cyclictest31979-21kworker/u16:3+efi_rts_wq10:15:122
29625992840,283cyclictest31979-21kworker/u16:3+efi_rts_wq08:45:131
29625992830,282cyclictest31979-21kworker/u16:3+efi_rts_wq09:40:131
29625992830,282cyclictest31979-21kworker/u16:3+efi_rts_wq07:25:131
29627992820,281cyclictest20967-21kworker/u16:4+efi_rts_wq09:10:133
29625992820,281cyclictest31979-21kworker/u16:3+efi_rts_wq10:18:091
29625992820,281cyclictest31979-21kworker/u16:3+efi_rts_wq08:15:131
29625992820,281cyclictest20967-21kworker/u16:4+efi_rts_wq10:35:151
29626992810,280cyclictest4320-21kworker/u16:2+efi_rts_wq11:20:132
29626992810,280cyclictest31979-21kworker/u16:3+efi_rts_wq09:30:132
29627992790,278cyclictest31979-21kworker/u16:3+efi_rts_wq08:15:143
29626992780,277cyclictest31979-21kworker/u16:3+efi_rts_wq09:25:122
29625992780,277cyclictest20967-21kworker/u16:4+efi_rts_wq11:00:101
29627992770,276cyclictest31979-21kworker/u16:3+efi_rts_wq08:30:123
29627992770,276cyclictest21313-21kworker/u16:0+efi_rts_wq11:55:133
29625992760,274cyclictest26002-21kworker/u16:0+efi_rts_wq10:45:131
29624992760,275cyclictest20967-21kworker/u16:4+efi_rts_wq10:03:070
29624992740,273cyclictest21313-21kworker/u16:0+efi_rts_wq11:20:140
29625992720,271cyclictest31979-21kworker/u16:3+efi_rts_wq09:35:141
29626992710,270cyclictest31979-21kworker/u16:3+efi_rts_wq09:05:132
29625992710,269cyclictest20967-21kworker/u16:4+efi_rts_wq11:30:121
29627992690,268cyclictest20967-21kworker/u16:4+efi_rts_wq12:20:113
29624992690,268cyclictest31979-21kworker/u16:3+efi_rts_wq09:05:130
29625992680,267cyclictest20967-21kworker/u16:4+efi_rts_wq11:35:121
29626992660,265cyclictest20967-21kworker/u16:4+efi_rts_wq10:00:122
29625992660,265cyclictest20967-21kworker/u16:4+efi_rts_wq11:40:141
29624992660,265cyclictest4320-21kworker/u16:2+efi_rts_wq11:13:180
29627992640,263cyclictest20967-21kworker/u16:4+efi_rts_wq09:53:053
29625992640,263cyclictest31979-21kworker/u16:3+efi_rts_wq08:40:141
29626992630,262cyclictest31979-21kworker/u16:3+efi_rts_wq08:10:122
29624992620,260cyclictest31979-21kworker/u16:3+efi_rts_wq09:25:120
29627992610,259cyclictest31979-21kworker/u16:3+efi_rts_wq07:50:123
29626992610,260cyclictest20967-21kworker/u16:4+efi_rts_wq09:02:552
29625992610,260cyclictest31979-21kworker/u16:3+efi_rts_wq09:33:011
29627992600,259cyclictest31979-21kworker/u16:3+efi_rts_wq10:20:133
29624992600,258cyclictest20967-21kworker/u16:4+efi_rts_wq11:15:130
29626992590,258cyclictest31979-21kworker/u16:3+efi_rts_wq10:20:132
29625992570,256cyclictest31979-21kworker/u16:3+efi_rts_wq08:52:541
29627992560,255cyclictest21313-21kworker/u16:0+efi_rts_wq12:15:143
29626992560,255cyclictest20967-21kworker/u16:4+efi_rts_wq10:55:122
29625992560,255cyclictest31979-21kworker/u16:3+efi_rts_wq10:10:141
29624992560,255cyclictest20967-21kworker/u16:4+efi_rts_wq08:27:480
29625992540,253cyclictest31979-21kworker/u16:3+efi_rts_wq07:20:131
29624992530,252cyclictest12105-21kworker/u16:0+efi_rts_wq07:35:130
29627992500,249cyclictest20967-21kworker/u16:4+efi_rts_wq10:00:123
29625992470,246cyclictest20967-21kworker/u16:4+efi_rts_wq08:02:451
29625992460,245cyclictest20967-21kworker/u16:4+efi_rts_wq08:12:461
29626992450,244cyclictest4320-21kworker/u16:2+efi_rts_wq10:50:122
29626992450,244cyclictest20967-21kworker/u16:4+efi_rts_wq10:40:122
29626992450,244cyclictest20967-21kworker/u16:4+efi_rts_wq08:05:142
29625992440,243cyclictest12105-21kworker/u16:0+efi_rts_wq07:10:121
29627992420,241cyclictest12105-21kworker/u16:0+efi_rts_wq07:15:013
29625992410,240cyclictest20967-21kworker/u16:4+efi_rts_wq10:40:121
29624992410,239cyclictest20967-21kworker/u16:4+efi_rts_wq11:40:140
29625992320,231cyclictest31979-21kworker/u16:3+efi_rts_wq09:45:151
29624992310,230cyclictest20967-21kworker/u16:4+efi_rts_wq08:55:120
29624992290,228cyclictest31979-21kworker/u16:3+efi_rts_wq07:45:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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