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2025-09-18 - 18:36

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 Sep 18, 2025 12:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
221032318305,4sleep20-21swapper/207:06:362
223362315307,5sleep10-21swapper/107:09:361
221242314306,5sleep30-21swapper/307:06:533
220962314306,5sleep00-21swapper/007:06:300
22635992970,296cyclictest31823-21kworker/u16:1+efi_rts_wq12:15:121
22636992960,295cyclictest20619-21kworker/u16:3+efi_rts_wq09:35:152
22634992960,295cyclictest20619-21kworker/u16:3+efi_rts_wq07:20:130
22637992930,292cyclictest20619-21kworker/u16:3+efi_rts_wq09:15:173
22636992930,292cyclictest3101-21kworker/u16:1+efi_rts_wq09:05:152
22635992930,292cyclictest11185-21kworker/u16:0+efi_rts_wq10:55:161
22637992920,291cyclictest3101-21kworker/u16:1+efi_rts_wq08:55:143
22634992920,291cyclictest20619-21kworker/u16:3+efi_rts_wq09:50:120
22637992910,290cyclictest11185-21kworker/u16:0+efi_rts_wq10:35:143
22634992910,290cyclictest3101-21kworker/u16:1+efi_rts_wq09:30:150
22635992900,289cyclictest3101-21kworker/u16:1+efi_rts_wq09:05:151
22635992900,289cyclictest20619-21kworker/u16:3+efi_rts_wq08:53:001
22636992860,285cyclictest31823-21kworker/u16:1+efi_rts_wq11:55:142
22636992860,285cyclictest3101-21kworker/u16:1+efi_rts_wq09:10:122
22635992860,285cyclictest31823-21kworker/u16:1+efi_rts_wq12:30:131
22636992840,283cyclictest29250-21kworker/u16:0+efi_rts_wq07:40:122
22635992830,282cyclictest29250-21kworker/u16:0+efi_rts_wq07:35:131
22635992830,282cyclictest13673-21kworker/u16:2+efi_rts_wq11:20:141
22634992830,282cyclictest3101-21kworker/u16:1+efi_rts_wq08:50:130
22634992830,282cyclictest11185-21kworker/u16:0+efi_rts_wq11:00:120
22636992800,278cyclictest20619-21kworker/u16:3+efi_rts_wq10:20:162
22635992800,277cyclictest31823-21kworker/u16:1+efi_rts_wq11:35:111
22635992790,278cyclictest29250-21kworker/u16:0+efi_rts_wq07:30:111
22634992790,278cyclictest31823-21kworker/u16:1+efi_rts_wq11:50:140
22637992770,276cyclictest18781-21kworker/u16:3+efi_rts_wq10:53:223
22637992760,275cyclictest11185-21kworker/u16:0+efi_rts_wq10:40:133
22635992750,274cyclictest29250-21kworker/u16:0+efi_rts_wq07:50:141
22634992750,274cyclictest20619-21kworker/u16:3+efi_rts_wq07:12:420
22637992740,273cyclictest3101-21kworker/u16:1+efi_rts_wq10:25:133
22635992740,273cyclictest20619-21kworker/u16:3+efi_rts_wq07:25:171
22636992710,270cyclictest11185-21kworker/u16:0+efi_rts_wq11:00:122
22635992710,270cyclictest20619-21kworker/u16:3+efi_rts_wq08:30:111
22636992700,269cyclictest29250-21kworker/u16:0+efi_rts_wq07:50:142
22636992670,266cyclictest3101-21kworker/u16:1+efi_rts_wq08:40:132
22636992670,264cyclictest18781-21kworker/u16:3+efi_rts_wq12:10:122
22634992670,266cyclictest20619-21kworker/u16:3+efi_rts_wq08:25:110
22634992670,265cyclictest13673-21kworker/u16:2+efi_rts_wq11:10:140
22637992660,264cyclictest3101-21kworker/u16:1+efi_rts_wq08:45:143
22636992660,265cyclictest3101-21kworker/u16:1+efi_rts_wq09:40:142
22635992640,263cyclictest20619-21kworker/u16:3+efi_rts_wq08:12:521
22635992640,263cyclictest18781-21kworker/u16:3+efi_rts_wq12:20:171
22635992620,261cyclictest20619-21kworker/u16:3+efi_rts_wq09:20:121
22635992620,261cyclictest20619-21kworker/u16:3+efi_rts_wq09:00:101
22635992610,260cyclictest3101-21kworker/u16:1+efi_rts_wq09:53:111
22634992610,260cyclictest31823-21kworker/u16:1+efi_rts_wq12:25:130
22634992610,260cyclictest11185-21kworker/u16:0+efi_rts_wq10:35:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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