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2026-09-02 - 13:39

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 Sep 02, 2026 00:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
134402322312,8sleep30-21swapper/319:08:243
132792318304,5sleep20-21swapper/219:06:192
133612316304,10sleep10-21swapper/119:07:231
132032315303,9sleep00-21swapper/019:05:220
13833993000,299cyclictest12528-21kworker/u16:1+efi_rts_wq20:14:272
13834992980,297cyclictest24442-21kworker/u16:0+efi_rts_wq00:25:113
13834992980,297cyclictest21578-21kworker/u16:0+efi_rts_wq19:20:133
13832992960,295cyclictest24442-21kworker/u16:0+efi_rts_wq00:30:121
13834992950,293cyclictest24442-21kworker/u16:0+efi_rts_wq23:20:003
13833992950,294cyclictest12528-21kworker/u16:1+efi_rts_wq21:20:122
13833992940,293cyclictest17756-21kworker/u16:3+efi_rts_wq23:30:022
13834992930,292cyclictest12528-21kworker/u16:1+efi_rts_wq21:40:123
13832992930,292cyclictest17756-21kworker/u16:3+efi_rts_wq23:45:121
13834992920,291cyclictest21578-21kworker/u16:0+efi_rts_wq20:05:123
13834992920,291cyclictest12528-21kworker/u16:1+efi_rts_wq20:10:143
13833992920,291cyclictest21578-21kworker/u16:0+efi_rts_wq19:55:162
13834992910,290cyclictest8564-21kworker/u16:2+efi_rts_wq22:50:133
13829992910,290cyclictest24442-21kworker/u16:0+efi_rts_wq00:10:140
13829992900,289cyclictest12528-21kworker/u16:1+efi_rts_wq21:24:420
13832992890,288cyclictest12528-21kworker/u16:1+efi_rts_wq19:40:111
13834992880,287cyclictest12528-21kworker/u16:1+efi_rts_wq21:45:153
13833992880,287cyclictest17756-21kworker/u16:3+efi_rts_wq00:30:142
13832992880,287cyclictest17756-21kworker/u16:3+efi_rts_wq22:55:121
13829992880,287cyclictest21578-21kworker/u16:0+efi_rts_wq20:35:120
13829992880,287cyclictest21578-21kworker/u16:0+efi_rts_wq20:30:140
13834992860,285cyclictest8564-21kworker/u16:2+efi_rts_wq23:15:013
13834992860,285cyclictest1934-21kworker/u16:0+efi_rts_wq22:40:133
13832992860,285cyclictest21578-21kworker/u16:0+efi_rts_wq19:39:221
13833992850,284cyclictest12528-21kworker/u16:1+efi_rts_wq21:30:122
13832992840,283cyclictest17756-21kworker/u16:3+efi_rts_wq22:15:131
13829992840,283cyclictest12528-21kworker/u16:1+efi_rts_wq22:25:130
13832992830,281cyclictest12528-21kworker/u16:1+efi_rts_wq20:25:141
13829992830,282cyclictest21578-21kworker/u16:0+efi_rts_wq20:55:140
13829992820,281cyclictest17756-21kworker/u16:3+efi_rts_wq22:05:120
13834992810,280cyclictest12528-21kworker/u16:1+efi_rts_wq20:40:133
13829992800,279cyclictest12528-21kworker/u16:1+efi_rts_wq22:30:130
13829992800,279cyclictest12528-21kworker/u16:1+efi_rts_wq21:30:130
13829992800,278cyclictest17756-21kworker/u16:3+efi_rts_wq22:55:130
13832992790,278cyclictest21578-21kworker/u16:0+efi_rts_wq21:25:111
13829992780,277cyclictest12528-21kworker/u16:1+efi_rts_wq20:00:130
13829992770,276cyclictest12528-21kworker/u16:1+efi_rts_wq20:49:350
13834992750,274cyclictest21578-21kworker/u16:0+efi_rts_wq19:35:133
13834992740,273cyclictest21578-21kworker/u16:0+efi_rts_wq20:50:123
13834992740,273cyclictest12528-21kworker/u16:1+efi_rts_wq22:34:533
13832992730,272cyclictest21578-21kworker/u16:0+efi_rts_wq20:15:141
13832992730,272cyclictest21578-21kworker/u16:0+efi_rts_wq20:15:131
13832992730,272cyclictest12528-21kworker/u16:1+efi_rts_wq22:00:141
13829992730,272cyclictest24442-21kworker/u16:0+efi_rts_wq23:40:130
13834992720,271cyclictest21578-21kworker/u16:0+efi_rts_wq20:59:383
13834992720,271cyclictest12528-21kworker/u16:1+efi_rts_wq22:25:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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