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2026-08-19 - 09:13

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 Wed Aug 19, 2026 00:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
257622317310,5sleep30-21swapper/319:07:393
259342316308,5sleep20-21swapper/219:09:502
257072315308,4sleep10-21swapper/119:06:561
256242314308,4sleep00-21swapper/019:05:510
26327993060,303cyclictest19604-21kworker/u16:1+efi_rts_wq23:55:131
26326993020,300cyclictest20759-21kworker/u16:0+efi_rts_wq22:50:140
26332992990,297cyclictest20759-21kworker/u16:0+efi_rts_wq22:45:123
26329992970,296cyclictest21783-21kworker/u16:3+efi_rts_wq21:54:522
26327992940,293cyclictest19604-21kworker/u16:1+efi_rts_wq00:15:151
26327992930,292cyclictest21783-21kworker/u16:3+efi_rts_wq20:05:181
26332992920,291cyclictest17609-21kworker/u16:1+efi_rts_wq19:25:113
26329992920,291cyclictest21783-21kworker/u16:3+efi_rts_wq22:55:122
26329992920,291cyclictest21783-21kworker/u16:3+efi_rts_wq20:00:132
26329992920,291cyclictest17609-21kworker/u16:1+efi_rts_wq20:55:142
26332992910,290cyclictest17609-21kworker/u16:1+efi_rts_wq22:20:153
26327992910,290cyclictest20759-21kworker/u16:0+efi_rts_wq23:15:121
26327992910,289cyclictest20759-21kworker/u16:0+efi_rts_wq22:50:151
26332992900,289cyclictest21783-21kworker/u16:3+efi_rts_wq19:14:223
26327992890,288cyclictest21783-21kworker/u16:3+efi_rts_wq22:14:561
26326992890,288cyclictest21783-21kworker/u16:3+efi_rts_wq21:05:130
26332992880,287cyclictest20759-21kworker/u16:0+efi_rts_wq23:20:123
26332992880,286cyclictest17609-21kworker/u16:1+efi_rts_wq22:35:143
26332992870,286cyclictest20759-21kworker/u16:0+efi_rts_wq23:40:133
26327992870,286cyclictest17609-21kworker/u16:1+efi_rts_wq22:35:131
26327992860,285cyclictest17609-21kworker/u16:1+efi_rts_wq21:35:141
26332992830,282cyclictest21783-21kworker/u16:3+efi_rts_wq21:05:123
26332992830,282cyclictest20759-21kworker/u16:0+efi_rts_wq23:30:153
26326992820,281cyclictest21783-21kworker/u16:3+efi_rts_wq22:55:120
26326992800,279cyclictest20759-21kworker/u16:0+efi_rts_wq23:40:100
26332992780,277cyclictest17609-21kworker/u16:1+efi_rts_wq19:40:153
26327992780,277cyclictest19604-21kworker/u16:1+efi_rts_wq00:25:141
26329992770,276cyclictest20759-21kworker/u16:0+efi_rts_wq23:00:162
26326992760,275cyclictest17609-21kworker/u16:1+efi_rts_wq20:14:340
26332992750,274cyclictest19604-21kworker/u16:1+efi_rts_wq23:55:123
26329992750,272cyclictest17609-21kworker/u16:1+efi_rts_wq20:45:122
26326992750,274cyclictest17609-21kworker/u16:1+efi_rts_wq21:45:150
26329992740,272cyclictest4142-21kworker/u16:2+efi_rts_wq23:35:122
26327992740,273cyclictest21783-21kworker/u16:3+efi_rts_wq21:20:171
26327992740,273cyclictest19604-21kworker/u16:1+efi_rts_wq00:10:141
26326992740,273cyclictest17609-21kworker/u16:1+efi_rts_wq22:09:540
26327992730,272cyclictest21783-21kworker/u16:3+efi_rts_wq21:50:131
26326992730,272cyclictest17292-21kworker/u16:3+efi_rts_wq23:50:120
26332992710,270cyclictest17609-21kworker/u16:1+efi_rts_wq20:45:123
26332992700,269cyclictest21783-21kworker/u16:3+efi_rts_wq20:15:153
26327992690,268cyclictest28397-21kworker/u16:1+efi_rts_wq23:05:041
26327992680,267cyclictest21783-21kworker/u16:3+efi_rts_wq22:00:151
26327992680,267cyclictest17609-21kworker/u16:1+efi_rts_wq19:55:141
26327992650,264cyclictest17609-21kworker/u16:1+efi_rts_wq20:55:131
26327992650,264cyclictest17609-21kworker/u16:1+efi_rts_wq19:50:131
26332992630,262cyclictest21783-21kworker/u16:3+efi_rts_wq22:30:143
26327992630,262cyclictest17609-21kworker/u16:1+efi_rts_wq21:55:141
26327992630,262cyclictest17609-21kworker/u16:1+efi_rts_wq19:34:251
26329992620,261cyclictest19604-21kworker/u16:1+efi_rts_wq00:35:202
26327992620,260cyclictest17609-21kworker/u16:1+efi_rts_wq21:45:141
26327992610,260cyclictest17609-21kworker/u16:1+efi_rts_wq19:15:131
26332992590,258cyclictest21783-21kworker/u16:3+efi_rts_wq20:30:133
26329992570,254cyclictest21939-21kworker/u16:2+efi_rts_wq00:20:112
26327992560,255cyclictest21783-21kworker/u16:3+efi_rts_wq22:40:131
26326992560,255cyclictest21939-21kworker/u16:2+efi_rts_wq00:30:190
26326992560,255cyclictest21783-21kworker/u16:3+efi_rts_wq21:40:110
26332992540,253cyclictest17609-21kworker/u16:1+efi_rts_wq20:25:143
26327992540,253cyclictest21783-21kworker/u16:3+efi_rts_wq22:15:131
26327992530,252cyclictest17292-21kworker/u16:3+efi_rts_wq23:50:121
26326992520,251cyclictest17609-21kworker/u16:1+efi_rts_wq20:25:130
26329992480,247cyclictest17609-21kworker/u16:1+efi_rts_wq19:59:302
26327992460,245cyclictest20759-21kworker/u16:0+efi_rts_wq23:25:111
26327992460,245cyclictest17609-21kworker/u16:1+efi_rts_wq19:20:131
26329992440,243cyclictest21939-21kworker/u16:2+efi_rts_wq00:00:142
26329992440,243cyclictest20759-21kworker/u16:0+efi_rts_wq23:15:122
26326992430,242cyclictest21783-21kworker/u16:3+efi_rts_wq19:15:000
26332992420,239cyclictest17609-21kworker/u16:1+efi_rts_wq20:10:143
26327992420,241cyclictest17609-21kworker/u16:1+efi_rts_wq20:10:151
26332992410,240cyclictest19604-21kworker/u16:1+efi_rts_wq00:25:183
26326992400,239cyclictest21783-21kworker/u16:3+efi_rts_wq21:00:140
26332992380,237cyclictest17609-21kworker/u16:1+efi_rts_wq19:20:143
26329992380,237cyclictest21783-21kworker/u16:3+efi_rts_wq20:20:122
26327992380,237cyclictest21783-21kworker/u16:3+efi_rts_wq21:30:141
26332992370,236cyclictest28397-21kworker/u16:1+efi_rts_wq23:10:063
26332992370,236cyclictest19604-21kworker/u16:1+efi_rts_wq00:05:143
26332992370,235cyclictest17609-21kworker/u16:1+efi_rts_wq22:05:133
26327992370,236cyclictest21939-21kworker/u16:2+efi_rts_wq00:05:171
26332992350,234cyclictest17609-21kworker/u16:1+efi_rts_wq22:25:133
26326992350,234cyclictest20759-21kworker/u16:0+efi_rts_wq23:20:100
26332992340,233cyclictest17609-21kworker/u16:1+efi_rts_wq21:29:473
26332992330,232cyclictest21783-21kworker/u16:3+efi_rts_wq21:00:133
26329992330,232cyclictest20759-21kworker/u16:0+efi_rts_wq22:45:132
26326992330,232cyclictest21783-21kworker/u16:3+efi_rts_wq22:40:120
26329992320,231cyclictest4142-21kworker/u16:2+efi_rts_wq23:45:142
26326992320,231cyclictest19604-21kworker/u16:1+efi_rts_wq00:15:150
26326992320,229cyclictest21783-21kworker/u16:3+efi_rts_wq21:50:130
26326992310,230cyclictest21783-21kworker/u16:3+efi_rts_wq20:05:170
26332992290,228cyclictest17609-21kworker/u16:1+efi_rts_wq22:10:143
26326992290,228cyclictest21783-21kworker/u16:3+efi_rts_wq21:20:160
26332992270,226cyclictest17609-21kworker/u16:1+efi_rts_wq19:55:153
26326992270,226cyclictest17609-21kworker/u16:1+efi_rts_wq19:39:260
26332992250,224cyclictest21783-21kworker/u16:3+efi_rts_wq20:35:143
26326992250,224cyclictest17609-21kworker/u16:1+efi_rts_wq20:49:390
26327992240,223cyclictest17609-21kworker/u16:1+efi_rts_wq20:29:361
26326992210,220cyclictest21783-21kworker/u16:3+efi_rts_wq19:10:140
26326992190,218cyclictest17609-21kworker/u16:1+efi_rts_wq21:10:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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