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2026-05-12 - 18:24

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 Tue May 12, 2026 12:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
324472318303,5sleep10-21swapper/107:07:441
323482316310,4sleep20-21swapper/207:06:282
323822315309,4sleep30-21swapper/307:06:533
323312313305,5sleep00-21swapper/007:06:150
547992990,298cyclictest23721-21kworker/u16:2+efi_rts_wq11:48:382
543992990,298cyclictest30380-21kworker/u16:2+efi_rts_wq07:47:540
545992970,296cyclictest26031-21kworker/u16:0+efi_rts_wq12:30:121
547992960,295cyclictest30380-21kworker/u16:2+efi_rts_wq07:15:122
543992960,295cyclictest23721-21kworker/u16:2+efi_rts_wq12:20:120
547992940,293cyclictest23721-21kworker/u16:2+efi_rts_wq12:05:132
547992930,292cyclictest15954-21kworker/u16:0+efi_rts_wq07:45:152
545992930,292cyclictest20089-21kworker/u16:1+efi_rts_wq09:10:141
543992930,292cyclictest24587-21kworker/u16:2+efi_rts_wq10:45:120
549992920,291cyclictest30380-21kworker/u16:2+efi_rts_wq08:20:113
549992920,291cyclictest23059-21kworker/u16:3+efi_rts_wq09:35:133
547992920,291cyclictest30470-21kworker/u16:3+efi_rts_wq08:25:132
545992920,291cyclictest30380-21kworker/u16:2+efi_rts_wq07:50:141
545992900,289cyclictest30380-21kworker/u16:2+efi_rts_wq08:15:141
543992900,289cyclictest26031-21kworker/u16:0+efi_rts_wq12:00:130
543992900,289cyclictest10895-21kworker/u16:3+efi_rts_wq12:35:120
543992890,288cyclictest25171-21kworker/u16:4+efi_rts_wq11:20:130
547992870,286cyclictest25171-21kworker/u16:4+efi_rts_wq10:43:282
545992870,286cyclictest2593-21kworker/u16:2+efi_rts_wq09:43:171
543992870,286cyclictest31543-21kworker/u16:0+efi_rts_wq10:25:110
549992860,285cyclictest2593-21kworker/u16:2+efi_rts_wq09:40:113
543992860,285cyclictest12126-21kworker/u16:0+efi_rts_wq09:25:130
543992860,282cyclictest23721-21kworker/u16:2+efi_rts_wq11:50:130
547992850,284cyclictest27394-21kworker/u16:1+efi_rts_wq10:35:142
549992820,281cyclictest31923-21kworker/u16:0+efi_rts_wq11:00:143
547992820,281cyclictest20089-21kworker/u16:1+efi_rts_wq08:48:062
545992820,281cyclictest28142-21kworker/u16:3+efi_rts_wq07:20:141
549992800,279cyclictest27394-21kworker/u16:1+efi_rts_wq10:00:133
545992780,277cyclictest27394-21kworker/u16:1+efi_rts_wq09:58:201
545992780,277cyclictest2593-21kworker/u16:2+efi_rts_wq08:35:121
545992780,277cyclictest13449-21kworker/u16:2+efi_rts_wq11:35:141
549992770,276cyclictest7788-21kworker/u16:3+efi_rts_wq10:05:143
545992770,276cyclictest30380-21kworker/u16:2+efi_rts_wq07:35:141
545992760,275cyclictest7788-21kworker/u16:3+efi_rts_wq10:33:261
545992740,273cyclictest2593-21kworker/u16:2+efi_rts_wq08:45:121
543992720,270cyclictest31923-21kworker/u16:0+efi_rts_wq11:30:130
545992710,270cyclictest31923-21kworker/u16:0+efi_rts_wq11:23:351
543992710,270cyclictest18854-21kworker/u16:1+efi_rts_wq11:45:130
543992690,268cyclictest30380-21kworker/u16:2+efi_rts_wq07:25:150
547992650,264cyclictest31923-21kworker/u16:0+efi_rts_wq11:05:142
547992650,264cyclictest15954-21kworker/u16:0+efi_rts_wq08:05:132
549992640,263cyclictest12126-21kworker/u16:0+efi_rts_wq09:03:093
545992640,263cyclictest31923-21kworker/u16:0+efi_rts_wq11:25:131
547992630,262cyclictest25171-21kworker/u16:4+efi_rts_wq11:20:132
547992630,262cyclictest21429-21kworker/u16:3+efi_rts_wq11:40:132
547992620,261cyclictest26031-21kworker/u16:0+efi_rts_wq11:58:402
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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