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2026-04-16 - 11:22

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 Wed Apr 15, 2026 12:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
232062320313,5sleep20-21swapper/207:07:542
232592318311,4sleep30-21swapper/307:08:353
231152316308,5sleep00-21swapper/007:06:440
232052314307,5sleep10-21swapper/107:07:531
23632993130,312cyclictest29602-21kworker/u16:2+efi_rts_wq09:46:490
23633993120,311cyclictest29602-21kworker/u16:2+efi_rts_wq07:45:141
23634993110,310cyclictest29602-21kworker/u16:2+efi_rts_wq08:25:132
23635993100,309cyclictest28216-21kworker/u16:2+efi_rts_wq10:45:143
23635993091,307cyclictest29602-21kworker/u16:2+efi_rts_wq07:40:123
23635993090,308cyclictest29602-21kworker/u16:2+efi_rts_wq09:41:473
23635993090,308cyclictest29602-21kworker/u16:2+efi_rts_wq08:10:123
23633993090,308cyclictest15027-21kworker/u16:3+efi_rts_wq08:30:131
23633993080,307cyclictest1346-21kworker/u16:1+efi_rts_wq12:20:121
23633993080,307cyclictest12459-21kworker/u16:0+efi_rts_wq11:20:121
23633993070,306cyclictest29602-21kworker/u16:2+efi_rts_wq07:40:121
23633993070,306cyclictest1346-21kworker/u16:1+efi_rts_wq12:30:111
23635993060,305cyclictest29602-21kworker/u16:2+efi_rts_wq09:06:413
23635993050,304cyclictest1346-21kworker/u16:1+efi_rts_wq11:00:143
23633993050,304cyclictest29602-21kworker/u16:2+efi_rts_wq07:20:121
23633993050,304cyclictest15027-21kworker/u16:3+efi_rts_wq09:05:131
23632993050,304cyclictest29602-21kworker/u16:2+efi_rts_wq07:50:120
23635993040,303cyclictest15027-21kworker/u16:3+efi_rts_wq10:30:133
23634993030,302cyclictest15027-21kworker/u16:3+efi_rts_wq08:35:122
23635993020,301cyclictest12459-21kworker/u16:0+efi_rts_wq12:35:113
23635993020,300cyclictest1346-21kworker/u16:1+efi_rts_wq11:50:123
23634993020,301cyclictest29602-21kworker/u16:2+efi_rts_wq07:30:112
23633993000,296cyclictest29602-21kworker/u16:2+efi_rts_wq09:10:131
23632993000,299cyclictest29602-21kworker/u16:2+efi_rts_wq08:55:130
23633992990,298cyclictest1346-21kworker/u16:1+efi_rts_wq12:25:131
23632992990,298cyclictest15027-21kworker/u16:3+efi_rts_wq10:00:120
23633992980,297cyclictest31046-21kworker/u16:0+efi_rts_wq10:55:111
23633992980,297cyclictest15027-21kworker/u16:3+efi_rts_wq08:40:131
23634992970,296cyclictest29602-21kworker/u16:2+efi_rts_wq09:30:112
23633992970,296cyclictest20838-21kworker/u16:0+efi_rts_wq10:40:131
23633992970,296cyclictest15027-21kworker/u16:3+efi_rts_wq08:45:111
23632992970,296cyclictest29602-21kworker/u16:2+efi_rts_wq09:35:120
23635992960,295cyclictest29602-21kworker/u16:2+efi_rts_wq09:00:123
23635992960,295cyclictest15027-21kworker/u16:3+efi_rts_wq08:00:133
23635992960,295cyclictest12459-21kworker/u16:0+efi_rts_wq12:07:153
23632992940,293cyclictest15027-21kworker/u16:3+efi_rts_wq10:35:130
23634992930,292cyclictest15027-21kworker/u16:3+efi_rts_wq07:35:122
23632992930,292cyclictest15027-21kworker/u16:3+efi_rts_wq07:15:120
23635992920,291cyclictest15027-21kworker/u16:3+efi_rts_wq09:45:123
23635992880,287cyclictest29602-21kworker/u16:2+efi_rts_wq07:51:293
23633992880,287cyclictest12459-21kworker/u16:0+efi_rts_wq12:35:121
23634992870,286cyclictest29602-21kworker/u16:2+efi_rts_wq09:55:132
23634992860,285cyclictest12459-21kworker/u16:0+efi_rts_wq12:27:182
23634992830,282cyclictest12459-21kworker/u16:0+efi_rts_wq12:15:112
23633992830,282cyclictest29602-21kworker/u16:2+efi_rts_wq10:30:131
23634992810,280cyclictest28216-21kworker/u16:2+efi_rts_wq10:52:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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