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2024-11-22 - 05:38

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 50 highest latencies:
System rackcslot3s.osadl.org (updated Fri Nov 22, 2024 00:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
219542318303,5sleep20-21swapper/219:09:362
219102317310,5sleep30-21swapper/319:09:053
217782314307,5sleep00-21swapper/019:07:220
216902312304,5sleep10-21swapper/119:06:151
22368992970,295cyclictest32227-21kworker/u16:1+efi_rts_wq22:35:130
22372992960,293cyclictest32227-21kworker/u16:1+efi_rts_wq23:10:112
22368992940,293cyclictest21617-21kworker/u16:0+efi_rts_wq22:50:150
22368992930,292cyclictest32227-21kworker/u16:1+efi_rts_wq21:15:130
22368992920,291cyclictest22024-21kworker/u16:2+efi_rts_wq20:10:130
22376992890,288cyclictest21617-21kworker/u16:0+efi_rts_wq00:15:133
22370992890,287cyclictest21617-21kworker/u16:0+efi_rts_wq22:55:111
22376992880,287cyclictest32227-21kworker/u16:1+efi_rts_wq22:15:123
22376992870,286cyclictest32227-21kworker/u16:1+efi_rts_wq23:44:563
22372992870,286cyclictest32227-21kworker/u16:1+efi_rts_wq21:29:402
22372992870,286cyclictest21617-21kworker/u16:0+efi_rts_wq22:50:162
22368992860,285cyclictest32227-21kworker/u16:1+efi_rts_wq00:25:130
22376992840,283cyclictest21617-21kworker/u16:0+efi_rts_wq00:24:593
22372992840,283cyclictest32227-21kworker/u16:1+efi_rts_wq20:35:112
22376992830,282cyclictest32227-21kworker/u16:1+efi_rts_wq20:25:113
22372992830,282cyclictest22024-21kworker/u16:2+efi_rts_wq19:35:112
22370992830,282cyclictest32227-21kworker/u16:1+efi_rts_wq20:35:111
22368992830,282cyclictest21617-21kworker/u16:0+efi_rts_wq21:50:140
22372992810,280cyclictest22024-21kworker/u16:2+efi_rts_wq20:05:112
22368992810,280cyclictest32227-21kworker/u16:1+efi_rts_wq22:30:160
22368992810,280cyclictest21617-21kworker/u16:0+efi_rts_wq21:04:370
22372992800,279cyclictest32227-21kworker/u16:1+efi_rts_wq21:59:442
22368992790,278cyclictest32227-21kworker/u16:1+efi_rts_wq00:20:140
22376992780,277cyclictest32227-21kworker/u16:1+efi_rts_wq20:15:143
22376992780,277cyclictest21617-21kworker/u16:0+efi_rts_wq00:10:183
22376992770,276cyclictest21617-21kworker/u16:0+efi_rts_wq23:30:183
22376992750,274cyclictest21617-21kworker/u16:0+efi_rts_wq00:04:573
22370992750,274cyclictest32227-21kworker/u16:1+efi_rts_wq21:19:381
22368992750,272cyclictest21617-21kworker/u16:0+efi_rts_wq00:30:170
22370992740,273cyclictest21617-21kworker/u16:0+efi_rts_wq21:54:451
22376992730,272cyclictest32227-21kworker/u16:1+efi_rts_wq21:25:133
22370992720,271cyclictest32227-21kworker/u16:1+efi_rts_wq21:20:131
22370992720,271cyclictest21617-21kworker/u16:0+efi_rts_wq20:40:131
22368992720,271cyclictest32227-21kworker/u16:1+efi_rts_wq22:19:470
22372992710,270cyclictest32227-21kworker/u16:1+efi_rts_wq00:35:132
22372992710,270cyclictest21617-21kworker/u16:0+efi_rts_wq23:05:132
22370992700,269cyclictest21617-21kworker/u16:0+efi_rts_wq21:40:131
22368992680,267cyclictest32227-21kworker/u16:1+efi_rts_wq23:15:130
22368992680,267cyclictest32227-21kworker/u16:1+efi_rts_wq22:09:460
22376992670,266cyclictest21617-21kworker/u16:0+efi_rts_wq21:00:133
22372992650,264cyclictest21617-21kworker/u16:0+efi_rts_wq23:00:122
22370992640,263cyclictest21617-21kworker/u16:0+efi_rts_wq00:05:141
22368992640,263cyclictest21617-21kworker/u16:0+efi_rts_wq22:55:100
22368992630,262cyclictest32227-21kworker/u16:1+efi_rts_wq19:29:230
22368992630,262cyclictest21617-21kworker/u16:0+efi_rts_wq22:45:130
22376992620,260cyclictest32227-21kworker/u16:1+efi_rts_wq22:35:123
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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