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2026-07-19 - 03:36

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 Sun Jul 19, 2026 00:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
231042318303,5sleep10-21swapper/119:08:531
230582318311,5sleep20-21swapper/219:08:182
229702315308,4sleep30-21swapper/319:07:103
228792314308,4sleep00-21swapper/019:06:000
23454993070,304cyclictest24197-21kworker/u16:0+efi_rts_wq22:30:130
23455993030,300cyclictest24197-21kworker/u16:0+efi_rts_wq20:15:111
23455993000,299cyclictest8022-21kworker/u16:2+efi_rts_wq19:25:161
23455993000,299cyclictest8022-21kworker/u16:2+efi_rts_wq19:10:221
23457992980,297cyclictest24197-21kworker/u16:0+efi_rts_wq21:20:123
23457992970,296cyclictest24197-21kworker/u16:0+efi_rts_wq21:00:133
23456992960,295cyclictest24197-21kworker/u16:0+efi_rts_wq20:30:122
23455992960,295cyclictest24197-21kworker/u16:0+efi_rts_wq21:10:141
23454992960,295cyclictest8022-21kworker/u16:2+efi_rts_wq21:50:130
23456992950,294cyclictest2069-21kworker/u16:2+efi_rts_wq23:36:222
23457992940,293cyclictest21985-21kworker/u16:0+efi_rts_wq00:00:133
23455992940,293cyclictest24197-21kworker/u16:0+efi_rts_wq19:50:131
23454992940,293cyclictest24197-21kworker/u16:0+efi_rts_wq21:30:130
23457992930,292cyclictest24197-21kworker/u16:0+efi_rts_wq21:35:133
23457992930,292cyclictest24197-21kworker/u16:0+efi_rts_wq19:20:123
23455992930,292cyclictest2069-21kworker/u16:2+efi_rts_wq23:45:131
23455992930,292cyclictest2069-21kworker/u16:2+efi_rts_wq23:35:151
23456992920,291cyclictest8022-21kworker/u16:2+efi_rts_wq19:10:122
23455992900,289cyclictest8022-21kworker/u16:2+efi_rts_wq20:10:141
23456992880,285cyclictest2069-21kworker/u16:2+efi_rts_wq00:15:122
23454992880,285cyclictest8022-21kworker/u16:2+efi_rts_wq22:05:120
23456992870,286cyclictest16064-21kworker/u16:3+efi_rts_wq23:00:132
23454992870,286cyclictest16064-21kworker/u16:3+efi_rts_wq23:20:150
23454992860,285cyclictest8022-21kworker/u16:2+efi_rts_wq19:35:120
23454992850,283cyclictest8022-21kworker/u16:2+efi_rts_wq22:40:120
23454992830,282cyclictest24197-21kworker/u16:0+efi_rts_wq20:50:140
23457992820,281cyclictest21985-21kworker/u16:0+efi_rts_wq00:25:143
23455992820,281cyclictest24197-21kworker/u16:0+efi_rts_wq22:15:111
23457992810,279cyclictest16064-21kworker/u16:3+efi_rts_wq22:55:143
23456992800,277cyclictest8022-21kworker/u16:2+efi_rts_wq22:45:142
23455992790,278cyclictest16064-21kworker/u16:3+efi_rts_wq23:50:151
23455992770,276cyclictest24197-21kworker/u16:0+efi_rts_wq21:45:161
23456992750,274cyclictest2069-21kworker/u16:2+efi_rts_wq00:20:132
23457992740,273cyclictest24197-21kworker/u16:0+efi_rts_wq19:15:233
23455992740,273cyclictest8022-21kworker/u16:2+efi_rts_wq21:15:161
23455992740,273cyclictest8022-21kworker/u16:2+efi_rts_wq21:15:151
23455992740,273cyclictest24197-21kworker/u16:0+efi_rts_wq20:40:131
23454992740,272cyclictest8022-21kworker/u16:2+efi_rts_wq22:50:140
23455992730,272cyclictest8022-21kworker/u16:2+efi_rts_wq21:50:121
23457992710,270cyclictest24197-21kworker/u16:0+efi_rts_wq22:25:133
23456992710,270cyclictest8022-21kworker/u16:2+efi_rts_wq21:40:102
23455992710,270cyclictest24197-21kworker/u16:0+efi_rts_wq20:35:131
23454992710,270cyclictest8022-21kworker/u16:2+efi_rts_wq22:10:120
23454992710,270cyclictest8022-21kworker/u16:2+efi_rts_wq21:05:130
23454992710,270cyclictest8022-21kworker/u16:2+efi_rts_wq20:25:390
23457992700,269cyclictest24197-21kworker/u16:0+efi_rts_wq22:35:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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