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2025-12-07 - 05:39

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 Sun Dec 07, 2025 00:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
109792319312,5sleep30-21swapper/319:09:553
107472319304,5sleep00-21swapper/019:06:560
109602316308,5sleep10-21swapper/119:09:411
106722315308,5sleep20-21swapper/219:05:582
11252993010,299cyclictest7087-21kworker/u16:3+efi_rts_wq19:50:132
11250992990,298cyclictest7087-21kworker/u16:3+efi_rts_wq23:05:490
11252992980,297cyclictest28568-21kworker/u16:2+efi_rts_wq20:30:232
11252992960,292cyclictest7087-21kworker/u16:3+efi_rts_wq20:50:152
11250992960,294cyclictest8361-21kworker/u16:0+efi_rts_wq00:20:140
11250992960,294cyclictest28568-21kworker/u16:2+efi_rts_wq20:05:130
11253992940,293cyclictest7087-21kworker/u16:3+efi_rts_wq23:25:123
11252992930,292cyclictest7087-21kworker/u16:3+efi_rts_wq21:20:132
11253992920,290cyclictest7087-21kworker/u16:3+efi_rts_wq22:55:133
11250992920,291cyclictest7087-21kworker/u16:3+efi_rts_wq22:40:140
11253992910,289cyclictest8361-21kworker/u16:0+efi_rts_wq00:30:153
11251992910,290cyclictest7087-21kworker/u16:3+efi_rts_wq20:55:261
11251992910,290cyclictest7087-21kworker/u16:3+efi_rts_wq19:20:131
11251992900,289cyclictest6043-21kworker/u16:2+efi_rts_wq00:00:141
11251992900,289cyclictest28568-21kworker/u16:2+efi_rts_wq22:25:431
11252992870,284cyclictest7087-21kworker/u16:3+efi_rts_wq22:10:172
11250992870,285cyclictest28568-21kworker/u16:2+efi_rts_wq21:25:130
11252992860,285cyclictest7087-21kworker/u16:3+efi_rts_wq19:45:152
11250992860,285cyclictest28568-21kworker/u16:2+efi_rts_wq20:35:130
11251992850,284cyclictest28568-21kworker/u16:2+efi_rts_wq21:35:121
11253992840,282cyclictest6043-21kworker/u16:2+efi_rts_wq00:10:143
11251992840,283cyclictest28568-21kworker/u16:2+efi_rts_wq20:00:151
11253992830,282cyclictest28568-21kworker/u16:2+efi_rts_wq19:15:023
11252992830,281cyclictest6043-21kworker/u16:2+efi_rts_wq00:25:152
11250992830,281cyclictest7087-21kworker/u16:3+efi_rts_wq21:05:140
11251992820,281cyclictest7087-21kworker/u16:3+efi_rts_wq19:35:131
11252992770,276cyclictest8361-21kworker/u16:0+efi_rts_wq00:00:572
11251992770,276cyclictest6043-21kworker/u16:2+efi_rts_wq23:55:121
11253992750,274cyclictest8361-21kworker/u16:0+efi_rts_wq00:15:153
11252992750,274cyclictest7087-21kworker/u16:3+efi_rts_wq19:40:132
11252992750,273cyclictest7087-21kworker/u16:3+efi_rts_wq22:00:152
11251992750,274cyclictest8361-21kworker/u16:0+efi_rts_wq00:35:121
11250992750,274cyclictest25207-21kworker/u16:1+efi_rts_wq23:50:140
11252992740,273cyclictest28568-21kworker/u16:2+efi_rts_wq21:35:122
11253992730,272cyclictest28568-21kworker/u16:2+efi_rts_wq21:55:113
11252992720,271cyclictest7087-21kworker/u16:3+efi_rts_wq22:40:452
11252992710,270cyclictest7087-21kworker/u16:3+efi_rts_wq21:05:142
11253992690,268cyclictest7087-21kworker/u16:3+efi_rts_wq20:55:143
11250992690,268cyclictest7087-21kworker/u16:3+efi_rts_wq23:35:140
11253992680,267cyclictest28568-21kworker/u16:2+efi_rts_wq21:20:303
11252992670,266cyclictest7087-21kworker/u16:3+efi_rts_wq21:50:152
11253992660,265cyclictest7087-21kworker/u16:3+efi_rts_wq21:00:153
11253992650,264cyclictest28568-21kworker/u16:2+efi_rts_wq21:15:143
11253992650,264cyclictest28568-21kworker/u16:2+efi_rts_wq21:15:133
11252992650,264cyclictest28568-21kworker/u16:2+efi_rts_wq21:45:122
11250992640,263cyclictest8361-21kworker/u16:0+efi_rts_wq00:15:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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