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2026-01-10 - 05:51

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 Sat Jan 10, 2026 00:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
202962328306,19sleep00-21swapper/019:08:000
201432323312,9sleep10-21swapper/119:06:011
201802317310,5sleep30-21swapper/319:06:313
186042316309,5sleep20-21swapper/219:05:022
20721993130,312cyclictest25756-21kworker/u16:2+efi_rts_wq23:25:122
20719993130,312cyclictest15616-21kworker/u16:3+efi_rts_wq23:30:130
20722993120,311cyclictest20392-21kworker/u16:0+efi_rts_wq21:10:123
20722993120,311cyclictest20392-21kworker/u16:0+efi_rts_wq21:10:123
20722993090,308cyclictest18123-21kworker/u16:0+efi_rts_wq22:50:133
20720993090,307cyclictest25756-21kworker/u16:2+efi_rts_wq23:55:111
20722993080,307cyclictest7279-21kworker/u16:1+efi_rts_wq00:35:113
20722993080,306cyclictest25756-21kworker/u16:2+efi_rts_wq23:51:163
20720993070,306cyclictest20392-21kworker/u16:0+efi_rts_wq19:29:161
20722993060,305cyclictest20392-21kworker/u16:0+efi_rts_wq21:00:133
20722993060,305cyclictest15616-21kworker/u16:3+efi_rts_wq23:35:113
20721993060,305cyclictest22543-21kworker/u16:1+efi_rts_wq22:20:112
20721993060,305cyclictest20392-21kworker/u16:0+efi_rts_wq19:34:182
20721993050,304cyclictest7279-21kworker/u16:1+efi_rts_wq00:16:192
20722993030,302cyclictest18850-21kworker/u16:3+efi_rts_wq00:30:123
20720993020,301cyclictest18850-21kworker/u16:3+efi_rts_wq00:06:171
20722993010,300cyclictest22543-21kworker/u16:1+efi_rts_wq20:20:113
20722993000,299cyclictest22543-21kworker/u16:1+efi_rts_wq21:50:123
20719993000,299cyclictest22543-21kworker/u16:1+efi_rts_wq19:45:120
20722992990,298cyclictest18850-21kworker/u16:3+efi_rts_wq00:01:163
20720992990,298cyclictest25756-21kworker/u16:2+efi_rts_wq23:30:021
20720992990,296cyclictest25756-21kworker/u16:2+efi_rts_wq23:15:141
20719992970,296cyclictest22543-21kworker/u16:1+efi_rts_wq20:20:110
20720992960,295cyclictest23189-21kworker/u16:1+efi_rts_wq23:00:131
20720992960,295cyclictest22543-21kworker/u16:1+efi_rts_wq20:15:121
20719992960,295cyclictest22543-21kworker/u16:1+efi_rts_wq20:30:140
20721992950,294cyclictest20392-21kworker/u16:0+efi_rts_wq21:15:122
20720992950,294cyclictest22543-21kworker/u16:1+efi_rts_wq21:14:351
20720992950,294cyclictest22543-21kworker/u16:1+efi_rts_wq21:14:351
20720992950,294cyclictest22543-21kworker/u16:1+efi_rts_wq21:05:121
20721992940,293cyclictest7279-21kworker/u16:1+efi_rts_wq23:40:042
20720992930,292cyclictest15616-21kworker/u16:3+efi_rts_wq23:20:011
20720992920,291cyclictest20392-21kworker/u16:0+efi_rts_wq21:04:331
20722992910,290cyclictest22543-21kworker/u16:1+efi_rts_wq22:05:123
20719992910,290cyclictest20392-21kworker/u16:0+efi_rts_wq20:39:290
20722992890,288cyclictest20392-21kworker/u16:0+efi_rts_wq19:54:213
20721992890,288cyclictest20392-21kworker/u16:0+efi_rts_wq19:40:112
20721992880,287cyclictest25756-21kworker/u16:2+efi_rts_wq23:05:122
20720992880,287cyclictest7279-21kworker/u16:1+efi_rts_wq00:15:121
20722992870,286cyclictest20392-21kworker/u16:0+efi_rts_wq21:30:133
20719992870,286cyclictest20392-21kworker/u16:0+efi_rts_wq19:50:120
20722992850,284cyclictest15616-21kworker/u16:3+efi_rts_wq23:30:133
20721992830,282cyclictest22543-21kworker/u16:1+efi_rts_wq22:15:112
20722992820,281cyclictest22543-21kworker/u16:1+efi_rts_wq20:44:303
20720992820,281cyclictest22543-21kworker/u16:1+efi_rts_wq22:19:481
20721992810,280cyclictest20392-21kworker/u16:0+efi_rts_wq21:55:112
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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