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2026-06-25 - 23:16

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 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 Jun 25, 2026 12:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
82012320305,5sleep30-21swapper/307:06:373
81672317310,4sleep10-21swapper/107:06:101
81232317305,10sleep20-21swapper/207:05:352
81932315307,5sleep00-21swapper/007:06:300
8731993020,299cyclictest13026-21kworker/u16:1+efi_rts_wq12:05:122
8731993000,299cyclictest18879-21kworker/u16:1+efi_rts_wq07:25:122
8732992990,298cyclictest5185-21kworker/u16:0+efi_rts_wq11:05:113
8731992990,298cyclictest18155-21kworker/u16:3+efi_rts_wq11:15:122
8729992980,297cyclictest26206-21kworker/u16:2+efi_rts_wq07:12:340
8732992960,295cyclictest26206-21kworker/u16:2+efi_rts_wq07:15:013
8732992960,295cyclictest18879-21kworker/u16:1+efi_rts_wq08:20:123
8729992960,295cyclictest18879-21kworker/u16:1+efi_rts_wq08:40:130
8732992940,293cyclictest31895-21kworker/u16:3+efi_rts_wq12:13:323
8729992940,293cyclictest10822-21kworker/u16:3+efi_rts_wq09:48:030
8730992930,292cyclictest30077-21kworker/u16:0+efi_rts_wq08:42:501
8729992910,290cyclictest23153-21kworker/u16:2+efi_rts_wq09:20:120
8732992900,289cyclictest30077-21kworker/u16:0+efi_rts_wq08:12:453
8730992900,289cyclictest18879-21kworker/u16:1+efi_rts_wq07:10:141
8730992890,287cyclictest20297-21kworker/u16:4+efi_rts_wq11:30:131
8731992870,286cyclictest10822-21kworker/u16:3+efi_rts_wq10:10:122
8729992870,286cyclictest10822-21kworker/u16:3+efi_rts_wq09:17:570
8732992860,285cyclictest26206-21kworker/u16:2+efi_rts_wq07:50:123
8730992850,284cyclictest18879-21kworker/u16:1+efi_rts_wq08:25:131
8732992820,281cyclictest13026-21kworker/u16:1+efi_rts_wq11:35:123
8730992820,281cyclictest30077-21kworker/u16:0+efi_rts_wq08:02:431
8729992810,280cyclictest10822-21kworker/u16:3+efi_rts_wq09:10:120
8732992800,279cyclictest26206-21kworker/u16:2+efi_rts_wq07:30:123
8731992800,279cyclictest31895-21kworker/u16:3+efi_rts_wq11:58:282
8729992800,279cyclictest10822-21kworker/u16:3+efi_rts_wq10:18:100
8731992780,277cyclictest27203-21kworker/u16:2+efi_rts_wq11:40:122
8731992780,277cyclictest18879-21kworker/u16:1+efi_rts_wq08:30:122
8730992780,277cyclictest9426-21kworker/u16:0+efi_rts_wq10:15:121
8729992780,277cyclictest26206-21kworker/u16:2+efi_rts_wq07:45:110
8729992760,275cyclictest18879-21kworker/u16:1+efi_rts_wq07:37:390
8729992740,273cyclictest26206-21kworker/u16:2+efi_rts_wq07:52:410
8732992730,272cyclictest32516-21kworker/u16:2+efi_rts_wq11:00:123
8730992720,271cyclictest10822-21kworker/u16:3+efi_rts_wq10:45:131
8729992710,270cyclictest9426-21kworker/u16:0+efi_rts_wq09:50:120
8729992690,268cyclictest30077-21kworker/u16:0+efi_rts_wq08:05:120
8731992680,267cyclictest9426-21kworker/u16:0+efi_rts_wq10:33:132
8731992680,267cyclictest27203-21kworker/u16:2+efi_rts_wq11:50:132
8730992680,267cyclictest30077-21kworker/u16:0+efi_rts_wq08:10:131
8729992680,265cyclictest18879-21kworker/u16:1+efi_rts_wq07:25:120
8729992670,266cyclictest10822-21kworker/u16:3+efi_rts_wq09:25:140
8732992650,264cyclictest23153-21kworker/u16:2+efi_rts_wq09:00:123
8731992650,264cyclictest23153-21kworker/u16:2+efi_rts_wq09:05:132
8729992640,263cyclictest10822-21kworker/u16:3+efi_rts_wq09:35:120
8730992630,262cyclictest10822-21kworker/u16:3+efi_rts_wq10:05:111
8729992630,262cyclictest27203-21kworker/u16:2+efi_rts_wq11:45:110
8732992620,261cyclictest9426-21kworker/u16:0+efi_rts_wq09:58:073
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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