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2026-08-27 - 12:10

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 Thu Aug 27, 2026 00:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
149392318305,4sleep20-21swapper/219:07:482
149972317309,5sleep30-21swapper/319:08:353
148492316303,10sleep00-21swapper/019:06:380
147782313307,4sleep10-21swapper/119:05:431
15375993040,301cyclictest3265-21kworker/u16:0+efi_rts_wq21:30:131
15375993020,301cyclictest3265-21kworker/u16:0+efi_rts_wq21:05:131
15376993010,300cyclictest15450-21kworker/u16:3+efi_rts_wq22:15:122
15376992990,298cyclictest1158-21kworker/u16:3+efi_rts_wq00:15:122
15374992990,298cyclictest17534-21kworker/u16:2+efi_rts_wq21:59:400
15375992980,297cyclictest17534-21kworker/u16:2+efi_rts_wq22:45:091
15374992980,296cyclictest1158-21kworker/u16:3+efi_rts_wq23:55:120
15376992960,295cyclictest3265-21kworker/u16:0+efi_rts_wq21:45:112
15377992940,293cyclictest3265-21kworker/u16:0+efi_rts_wq20:40:113
15375992920,291cyclictest3265-21kworker/u16:0+efi_rts_wq19:30:151
15375992920,291cyclictest16114-21kworker/u16:1+efi_rts_wq23:10:121
15376992900,287cyclictest17534-21kworker/u16:2+efi_rts_wq22:55:122
15374992900,289cyclictest17534-21kworker/u16:2+efi_rts_wq22:40:110
15377992890,288cyclictest25838-21kworker/u16:1+efi_rts_wq21:10:103
15376992890,288cyclictest25838-21kworker/u16:1+efi_rts_wq19:40:132
15376992890,288cyclictest13482-21kworker/u16:0+efi_rts_wq23:20:132
15375992890,288cyclictest3265-21kworker/u16:0+efi_rts_wq20:30:131
15375992890,288cyclictest25838-21kworker/u16:1+efi_rts_wq21:15:121
15374992890,288cyclictest16114-21kworker/u16:1+efi_rts_wq23:05:120
15377992870,286cyclictest1158-21kworker/u16:3+efi_rts_wq23:55:133
15377992860,285cyclictest17534-21kworker/u16:2+efi_rts_wq22:14:433
15375992860,285cyclictest1158-21kworker/u16:3+efi_rts_wq23:50:141
15377992840,282cyclictest25838-21kworker/u16:1+efi_rts_wq21:25:143
15377992830,282cyclictest15450-21kworker/u16:3+efi_rts_wq22:15:133
15375992820,281cyclictest15450-21kworker/u16:3+efi_rts_wq21:55:121
15376992810,280cyclictest3265-21kworker/u16:0+efi_rts_wq19:50:132
15375992810,280cyclictest3265-21kworker/u16:0+efi_rts_wq20:45:111
15374992810,280cyclictest17534-21kworker/u16:2+efi_rts_wq22:05:110
15374992810,280cyclictest1158-21kworker/u16:3+efi_rts_wq00:05:160
15375992800,279cyclictest1158-21kworker/u16:3+efi_rts_wq23:40:001
15376992780,277cyclictest3265-21kworker/u16:0+efi_rts_wq19:30:152
15376992780,276cyclictest3265-21kworker/u16:0+efi_rts_wq19:15:012
15377992770,276cyclictest16114-21kworker/u16:1+efi_rts_wq00:10:123
15375992770,276cyclictest13482-21kworker/u16:0+efi_rts_wq22:54:521
15376992750,274cyclictest3265-21kworker/u16:0+efi_rts_wq21:20:142
15375992750,274cyclictest16114-21kworker/u16:1+efi_rts_wq23:45:121
15374992750,274cyclictest3265-21kworker/u16:0+efi_rts_wq19:15:110
15374992740,273cyclictest3265-21kworker/u16:0+efi_rts_wq20:10:130
15376992720,271cyclictest25838-21kworker/u16:1+efi_rts_wq21:10:112
15376992720,271cyclictest15450-21kworker/u16:3+efi_rts_wq22:10:132
15377992710,270cyclictest3265-21kworker/u16:0+efi_rts_wq19:19:083
15377992710,270cyclictest13482-21kworker/u16:0+efi_rts_wq23:20:123
15376992680,267cyclictest1158-21kworker/u16:3+efi_rts_wq00:25:132
15375992680,267cyclictest25838-21kworker/u16:1+efi_rts_wq20:50:131
15375992660,265cyclictest25838-21kworker/u16:1+efi_rts_wq21:35:101
15375992660,265cyclictest13482-21kworker/u16:0+efi_rts_wq23:25:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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