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2026-08-18 - 20:32

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 100 highest latencies:
System rackcslot3s.osadl.org (updated Tue Aug 18, 2026 12:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
260522331304,24sleep20-21swapper/207:07:492
260632316309,5sleep30-21swapper/307:07:583
259442316308,5sleep00-21swapper/007:06:270
260762314307,5sleep10-21swapper/107:08:081
26486993030,300cyclictest17898-21kworker/u16:2+efi_rts_wq11:02:430
26487993000,299cyclictest12237-21kworker/u16:1+efi_rts_wq10:00:131
26489992990,298cyclictest22257-21kworker/u16:3+efi_rts_wq12:35:133
26487992990,298cyclictest4976-21kworker/u16:0+efi_rts_wq09:25:141
26487992990,298cyclictest17898-21kworker/u16:2+efi_rts_wq11:20:131
26487992970,296cyclictest12237-21kworker/u16:1+efi_rts_wq07:35:131
26489992950,294cyclictest17898-21kworker/u16:2+efi_rts_wq11:50:133
26486992940,293cyclictest4976-21kworker/u16:0+efi_rts_wq08:25:150
26489992920,291cyclictest4976-21kworker/u16:0+efi_rts_wq08:25:153
26487992920,291cyclictest4976-21kworker/u16:0+efi_rts_wq09:47:291
26487992920,291cyclictest22257-21kworker/u16:3+efi_rts_wq12:15:131
26487992920,291cyclictest22257-21kworker/u16:3+efi_rts_wq12:15:131
26487992910,290cyclictest12237-21kworker/u16:1+efi_rts_wq10:22:361
26487992910,290cyclictest12237-21kworker/u16:1+efi_rts_wq08:35:111
26486992910,290cyclictest12237-21kworker/u16:1+efi_rts_wq10:20:130
26486992900,288cyclictest17898-21kworker/u16:2+efi_rts_wq10:55:140
26488992890,288cyclictest3335-21kworker/u16:0+efi_rts_wq11:55:132
26486992890,288cyclictest4976-21kworker/u16:0+efi_rts_wq10:07:330
26486992890,288cyclictest12237-21kworker/u16:1+efi_rts_wq09:42:280
26488992880,287cyclictest15411-21kworker/u16:3+efi_rts_wq10:35:142
26487992880,287cyclictest22257-21kworker/u16:3+efi_rts_wq12:38:021
26489992870,286cyclictest17898-21kworker/u16:2+efi_rts_wq11:20:133
26486992870,286cyclictest12237-21kworker/u16:1+efi_rts_wq08:22:120
26487992860,285cyclictest12237-21kworker/u16:1+efi_rts_wq08:30:131
26486992860,285cyclictest12237-21kworker/u16:1+efi_rts_wq08:07:100
26487992850,284cyclictest17898-21kworker/u16:2+efi_rts_wq11:00:131
26486992850,284cyclictest4976-21kworker/u16:0+efi_rts_wq07:40:120
26488992840,283cyclictest12237-21kworker/u16:1+efi_rts_wq07:55:142
26489992830,282cyclictest12237-21kworker/u16:1+efi_rts_wq08:55:143
26486992830,282cyclictest4976-21kworker/u16:0+efi_rts_wq09:35:130
26486992820,281cyclictest4976-21kworker/u16:0+efi_rts_wq08:02:090
26486992820,281cyclictest17898-21kworker/u16:2+efi_rts_wq11:45:120
26486992820,280cyclictest4976-21kworker/u16:0+efi_rts_wq09:45:130
26489992810,280cyclictest22257-21kworker/u16:3+efi_rts_wq12:20:133
26486992810,280cyclictest4976-21kworker/u16:0+efi_rts_wq07:50:120
26489992800,279cyclictest4976-21kworker/u16:0+efi_rts_wq09:27:253
26487992800,279cyclictest12237-21kworker/u16:1+efi_rts_wq09:05:141
26486992800,279cyclictest4976-21kworker/u16:0+efi_rts_wq10:25:140
26488992790,278cyclictest12237-21kworker/u16:1+efi_rts_wq09:30:132
26487992790,278cyclictest4976-21kworker/u16:0+efi_rts_wq07:20:121
26486992780,277cyclictest4976-21kworker/u16:0+efi_rts_wq08:12:110
26486992770,276cyclictest17898-21kworker/u16:2+efi_rts_wq11:15:130
26486992760,275cyclictest15411-21kworker/u16:3+efi_rts_wq10:35:140
26489992750,274cyclictest4976-21kworker/u16:0+efi_rts_wq10:30:133
26487992750,274cyclictest4976-21kworker/u16:0+efi_rts_wq09:35:131
26489992740,273cyclictest4976-21kworker/u16:0+efi_rts_wq07:30:133
26489992740,271cyclictest12237-21kworker/u16:1+efi_rts_wq09:50:113
26487992740,273cyclictest3335-21kworker/u16:0+efi_rts_wq11:52:541
26486992740,273cyclictest12237-21kworker/u16:1+efi_rts_wq09:32:260
26489992720,271cyclictest4976-21kworker/u16:0+efi_rts_wq08:00:133
26488992720,271cyclictest17898-21kworker/u16:2+efi_rts_wq11:25:132
26488992710,269cyclictest22257-21kworker/u16:3+efi_rts_wq12:00:132
26487992700,269cyclictest4976-21kworker/u16:0+efi_rts_wq10:15:101
26487992690,268cyclictest4976-21kworker/u16:0+efi_rts_wq09:55:141
26487992690,268cyclictest4976-21kworker/u16:0+efi_rts_wq08:50:121
26487992690,268cyclictest12237-21kworker/u16:1+efi_rts_wq09:40:121
26487992690,268cyclictest12237-21kworker/u16:1+efi_rts_wq07:25:131
26489992680,267cyclictest3335-21kworker/u16:0+efi_rts_wq12:12:573
26487992680,266cyclictest12237-21kworker/u16:1+efi_rts_wq10:40:141
26489992670,266cyclictest12237-21kworker/u16:1+efi_rts_wq09:40:133
26486992670,266cyclictest12237-21kworker/u16:1+efi_rts_wq10:50:130
26489992660,265cyclictest4976-21kworker/u16:0+efi_rts_wq07:50:123
26487992650,264cyclictest4976-21kworker/u16:0+efi_rts_wq09:00:121
26486992650,264cyclictest12237-21kworker/u16:1+efi_rts_wq08:45:130
26489992630,260cyclictest17898-21kworker/u16:2+efi_rts_wq10:55:143
26487992600,259cyclictest12237-21kworker/u16:1+efi_rts_wq07:10:131
26489992590,258cyclictest17898-21kworker/u16:2+efi_rts_wq11:25:133
26488992590,258cyclictest12237-21kworker/u16:1+efi_rts_wq09:22:242
26486992590,258cyclictest12237-21kworker/u16:1+efi_rts_wq10:02:320
26489992580,257cyclictest12237-21kworker/u16:1+efi_rts_wq07:35:133
26486992580,257cyclictest4976-21kworker/u16:0+efi_rts_wq09:00:120
26486992580,257cyclictest12237-21kworker/u16:1+efi_rts_wq11:05:120
26489992560,255cyclictest12237-21kworker/u16:1+efi_rts_wq08:15:123
26488992550,254cyclictest12237-21kworker/u16:1+efi_rts_wq10:20:132
26488992540,252cyclictest17898-21kworker/u16:2+efi_rts_wq11:20:132
26487992530,252cyclictest17898-21kworker/u16:2+efi_rts_wq11:47:531
26488992510,250cyclictest3335-21kworker/u16:0+efi_rts_wq12:10:132
26488992480,247cyclictest22257-21kworker/u16:3+efi_rts_wq12:35:122
26489992440,243cyclictest4976-21kworker/u16:0+efi_rts_wq09:10:133
26487992430,242cyclictest12237-21kworker/u16:1+efi_rts_wq08:55:141
26489992400,239cyclictest4976-21kworker/u16:0+efi_rts_wq09:45:133
26489992390,238cyclictest3335-21kworker/u16:0+efi_rts_wq11:30:133
26488992370,234cyclictest17898-21kworker/u16:2+efi_rts_wq12:25:122
26486992370,236cyclictest12237-21kworker/u16:1+efi_rts_wq07:17:010
26487992350,234cyclictest17898-21kworker/u16:2+efi_rts_wq11:32:501
26486992350,234cyclictest17898-21kworker/u16:2+efi_rts_wq12:28:000
26488992340,233cyclictest3335-21kworker/u16:0+efi_rts_wq11:35:132
26489992300,229cyclictest12237-21kworker/u16:1+efi_rts_wq10:10:143
26488992290,228cyclictest12237-21kworker/u16:1+efi_rts_wq10:50:122
26487992270,226cyclictest4976-21kworker/u16:0+efi_rts_wq08:00:131
26488992230,222cyclictest12237-21kworker/u16:1+efi_rts_wq10:00:132
26487992220,221cyclictest12237-21kworker/u16:1+efi_rts_wq08:05:131
26488992210,220cyclictest12237-21kworker/u16:1+efi_rts_wq08:30:132
26486992200,219cyclictest12237-21kworker/u16:1+efi_rts_wq09:05:130
26488992190,218cyclictest17898-21kworker/u16:2+efi_rts_wq12:33:012
26486992190,218cyclictest4976-21kworker/u16:0+efi_rts_wq08:52:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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