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2026-05-06 - 13:37

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 50 highest latencies:
System rackcslot3s.osadl.org (updated Wed May 06, 2026 00:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
254302321306,5sleep00-21swapper/019:10:000
253372317309,5sleep30-21swapper/319:08:513
235972317303,5sleep10-21swapper/119:05:121
252272314307,5sleep20-21swapper/219:07:262
25695993000,298cyclictest14419-21kworker/u16:2+efi_rts_wq22:30:132
25695992990,298cyclictest31545-21kworker/u16:0+efi_rts_wq22:35:152
25693992990,297cyclictest31545-21kworker/u16:0+efi_rts_wq22:40:120
25696992980,297cyclictest31545-21kworker/u16:0+efi_rts_wq22:10:133
25696992980,297cyclictest14419-21kworker/u16:2+efi_rts_wq20:45:133
25696992950,294cyclictest31545-21kworker/u16:0+efi_rts_wq22:15:133
25696992950,294cyclictest24717-21kworker/u16:1+efi_rts_wq23:10:113
25695992950,294cyclictest31545-21kworker/u16:0+efi_rts_wq22:45:142
25694992950,294cyclictest14419-21kworker/u16:2+efi_rts_wq22:15:121
25696992920,291cyclictest14419-21kworker/u16:2+efi_rts_wq21:35:143
25693992920,290cyclictest31545-21kworker/u16:0+efi_rts_wq22:45:180
25695992910,290cyclictest14419-21kworker/u16:2+efi_rts_wq21:30:122
25696992900,289cyclictest24717-21kworker/u16:1+efi_rts_wq23:05:143
25694992900,289cyclictest19177-21kworker/u16:1+efi_rts_wq19:40:111
25693992900,289cyclictest14419-21kworker/u16:2+efi_rts_wq20:40:140
25693992900,289cyclictest13668-21kworker/u16:0+efi_rts_wq00:35:130
25693992890,288cyclictest19177-21kworker/u16:1+efi_rts_wq19:55:130
25696992860,285cyclictest19177-21kworker/u16:1+efi_rts_wq19:35:133
25695992850,284cyclictest14419-21kworker/u16:2+efi_rts_wq22:00:132
25695992840,283cyclictest15961-21kworker/u16:2+efi_rts_wq00:20:142
25694992840,283cyclictest24717-21kworker/u16:1+efi_rts_wq23:15:241
25693992830,282cyclictest14419-21kworker/u16:2+efi_rts_wq21:10:120
25696992820,281cyclictest7216-21kworker/u16:2+efi_rts_wq23:30:113
25694992820,281cyclictest31545-21kworker/u16:0+efi_rts_wq20:54:591
25694992810,280cyclictest14419-21kworker/u16:2+efi_rts_wq19:34:431
25694992810,280cyclictest13668-21kworker/u16:0+efi_rts_wq00:30:121
25694992810,279cyclictest15961-21kworker/u16:2+efi_rts_wq23:50:121
25696992800,279cyclictest31545-21kworker/u16:0+efi_rts_wq21:10:013
25696992800,278cyclictest19177-21kworker/u16:1+efi_rts_wq19:15:013
25694992770,275cyclictest7216-21kworker/u16:2+efi_rts_wq23:30:111
25694992750,274cyclictest14419-21kworker/u16:2+efi_rts_wq22:50:131
25693992750,274cyclictest14419-21kworker/u16:2+efi_rts_wq21:35:050
25694992740,273cyclictest19177-21kworker/u16:1+efi_rts_wq19:15:011
25696992730,271cyclictest31545-21kworker/u16:0+efi_rts_wq22:40:123
25696992710,270cyclictest15961-21kworker/u16:2+efi_rts_wq00:10:123
25695992710,270cyclictest14419-21kworker/u16:2+efi_rts_wq20:50:132
25694992710,270cyclictest24717-21kworker/u16:1+efi_rts_wq23:05:151
25696992700,267cyclictest13668-21kworker/u16:0+efi_rts_wq00:00:323
25695992690,268cyclictest19177-21kworker/u16:1+efi_rts_wq19:35:132
25694992690,268cyclictest15961-21kworker/u16:2+efi_rts_wq00:15:351
25693992680,267cyclictest15961-21kworker/u16:2+efi_rts_wq23:55:320
25693992670,266cyclictest31545-21kworker/u16:0+efi_rts_wq23:15:130
25694992660,265cyclictest14419-21kworker/u16:2+efi_rts_wq22:10:111
25694992660,265cyclictest14419-21kworker/u16:2+efi_rts_wq20:25:121
25694992660,265cyclictest14419-21kworker/u16:2+efi_rts_wq20:00:131
25694992640,263cyclictest13668-21kworker/u16:0+efi_rts_wq00:25:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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