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2025-11-21 - 10:01

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 100 highest latencies:
System rackcslot3s.osadl.org (updated Fri Nov 21, 2025 00:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
116062317309,5sleep30-21swapper/319:06:143
119032316302,5sleep00-21swapper/019:10:000
117242316302,5sleep10-21swapper/119:07:451
117722314307,5sleep20-21swapper/219:08:222
12168993030,302cyclictest23660-21kworker/u16:2+efi_rts_wq23:30:122
12167993010,300cyclictest16847-21kworker/u16:1+efi_rts_wq19:34:591
12169992990,298cyclictest10577-21kworker/u16:3+efi_rts_wq21:50:143
12167992990,298cyclictest16847-21kworker/u16:1+efi_rts_wq21:45:141
12166992990,297cyclictest19723-21kworker/u16:4+efi_rts_wq23:20:160
12168992980,297cyclictest10577-21kworker/u16:3+efi_rts_wq22:10:272
12167992980,297cyclictest16847-21kworker/u16:1+efi_rts_wq20:00:151
12167992970,295cyclictest14076-21kworker/u16:3+efi_rts_wq23:05:391
12166992970,296cyclictest10577-21kworker/u16:3+efi_rts_wq19:29:580
12169992960,295cyclictest3819-21kworker/u16:1+efi_rts_wq00:20:133
12169992960,295cyclictest3819-21kworker/u16:1+efi_rts_wq00:15:153
12167992960,295cyclictest32372-21kworker/u16:2+efi_rts_wq22:50:141
12167992960,295cyclictest10577-21kworker/u16:3+efi_rts_wq21:50:131
12169992940,292cyclictest10577-21kworker/u16:3+efi_rts_wq19:55:143
12168992940,293cyclictest19723-21kworker/u16:4+efi_rts_wq23:55:152
12167992940,293cyclictest10577-21kworker/u16:3+efi_rts_wq19:40:001
12166992940,293cyclictest16847-21kworker/u16:1+efi_rts_wq21:35:130
12166992930,291cyclictest32372-21kworker/u16:2+efi_rts_wq22:55:150
12168992920,290cyclictest10577-21kworker/u16:3+efi_rts_wq19:35:142
12167992920,291cyclictest19723-21kworker/u16:4+efi_rts_wq00:25:131
12166992920,291cyclictest16847-21kworker/u16:1+efi_rts_wq21:55:250
12167992910,290cyclictest10577-21kworker/u16:3+efi_rts_wq19:45:121
12166992910,290cyclictest16847-21kworker/u16:1+efi_rts_wq22:20:150
12166992900,289cyclictest29715-21kworker/u16:0+efi_rts_wq23:05:160
12168992890,288cyclictest16847-21kworker/u16:1+efi_rts_wq20:00:132
12168992890,288cyclictest10577-21kworker/u16:3+efi_rts_wq20:45:162
12167992890,288cyclictest29715-21kworker/u16:0+efi_rts_wq22:30:131
12166992890,286cyclictest10577-21kworker/u16:3+efi_rts_wq20:15:150
12168992880,287cyclictest16847-21kworker/u16:1+efi_rts_wq20:10:162
12169992870,286cyclictest16847-21kworker/u16:1+efi_rts_wq22:05:273
12167992870,286cyclictest19723-21kworker/u16:4+efi_rts_wq00:00:141
12166992870,286cyclictest23660-21kworker/u16:2+efi_rts_wq23:45:440
12169992860,285cyclictest19723-21kworker/u16:4+efi_rts_wq00:35:143
12167992860,285cyclictest16847-21kworker/u16:1+efi_rts_wq20:35:101
12169992830,282cyclictest3819-21kworker/u16:1+efi_rts_wq00:30:533
12168992820,281cyclictest16847-21kworker/u16:1+efi_rts_wq19:24:572
12167992820,281cyclictest16847-21kworker/u16:1+efi_rts_wq21:55:151
12167992820,281cyclictest10577-21kworker/u16:3+efi_rts_wq20:05:131
12169992810,280cyclictest16847-21kworker/u16:1+efi_rts_wq19:40:093
12166992790,278cyclictest10577-21kworker/u16:3+efi_rts_wq19:19:570
12169992760,275cyclictest10577-21kworker/u16:3+efi_rts_wq20:05:133
12169992750,274cyclictest10577-21kworker/u16:3+efi_rts_wq20:55:193
12167992740,273cyclictest3819-21kworker/u16:1+efi_rts_wq00:05:121
12166992740,273cyclictest16847-21kworker/u16:1+efi_rts_wq21:10:130
12169992720,271cyclictest23660-21kworker/u16:2+efi_rts_wq23:35:163
12169992720,271cyclictest16847-21kworker/u16:1+efi_rts_wq21:40:133
12169992720,271cyclictest16847-21kworker/u16:1+efi_rts_wq21:40:133
12168992720,271cyclictest10577-21kworker/u16:3+efi_rts_wq21:25:192
12168992700,269cyclictest10577-21kworker/u16:3+efi_rts_wq20:30:192
12166992700,269cyclictest3819-21kworker/u16:1+efi_rts_wq00:15:500
12167992690,268cyclictest19723-21kworker/u16:4+efi_rts_wq00:10:511
12166992680,267cyclictest23660-21kworker/u16:2+efi_rts_wq23:35:160
12168992670,266cyclictest16847-21kworker/u16:1+efi_rts_wq21:45:242
12169992660,265cyclictest10577-21kworker/u16:3+efi_rts_wq19:15:143
12166992660,265cyclictest10577-21kworker/u16:3+efi_rts_wq21:15:120
12169992640,262cyclictest10577-21kworker/u16:3+efi_rts_wq22:15:293
12167992640,263cyclictest19723-21kworker/u16:4+efi_rts_wq00:35:131
12166992640,263cyclictest16847-21kworker/u16:1+efi_rts_wq20:05:040
12166992620,261cyclictest16847-21kworker/u16:1+efi_rts_wq19:40:100
12166992610,260cyclictest19723-21kworker/u16:4+efi_rts_wq00:00:140
12168992600,259cyclictest10577-21kworker/u16:3+efi_rts_wq19:14:552
12169992590,257cyclictest10577-21kworker/u16:3+efi_rts_wq22:00:133
12167992580,255cyclictest10577-21kworker/u16:3+efi_rts_wq21:00:141
12166992580,256cyclictest32372-21kworker/u16:2+efi_rts_wq22:40:140
12168992570,256cyclictest14076-21kworker/u16:3+efi_rts_wq23:00:372
12167992570,256cyclictest16847-21kworker/u16:1+efi_rts_wq21:30:161
12166992570,256cyclictest16847-21kworker/u16:1+efi_rts_wq19:20:120
12167992550,254cyclictest32372-21kworker/u16:2+efi_rts_wq22:45:141
12169992530,251cyclictest19723-21kworker/u16:4+efi_rts_wq23:55:143
12167992520,251cyclictest10577-21kworker/u16:3+efi_rts_wq19:25:131
12166992470,246cyclictest16847-21kworker/u16:1+efi_rts_wq21:05:120
12169992430,242cyclictest32372-21kworker/u16:2+efi_rts_wq22:45:133
12169992420,241cyclictest10577-21kworker/u16:3+efi_rts_wq20:30:183
12167992420,241cyclictest16847-21kworker/u16:1+efi_rts_wq20:25:141
12168992410,240cyclictest16847-21kworker/u16:1+efi_rts_wq21:40:132
12168992410,240cyclictest16847-21kworker/u16:1+efi_rts_wq21:40:132
12169992400,238cyclictest23660-21kworker/u16:2+efi_rts_wq23:30:123
12169992380,237cyclictest10577-21kworker/u16:3+efi_rts_wq20:40:103
12168992380,237cyclictest3819-21kworker/u16:1+efi_rts_wq00:20:142
12168992380,237cyclictest16847-21kworker/u16:1+efi_rts_wq22:05:132
12169992370,236cyclictest29715-21kworker/u16:0+efi_rts_wq23:15:123
12166992370,236cyclictest14076-21kworker/u16:3+efi_rts_wq23:00:130
12168992340,233cyclictest32372-21kworker/u16:2+efi_rts_wq22:30:312
12167992340,233cyclictest10577-21kworker/u16:3+efi_rts_wq20:45:161
12166992340,233cyclictest19723-21kworker/u16:4+efi_rts_wq00:10:150
12169992330,232cyclictest19723-21kworker/u16:4+efi_rts_wq23:20:153
12166992330,232cyclictest10577-21kworker/u16:3+efi_rts_wq22:25:150
12169992310,230cyclictest16847-21kworker/u16:1+efi_rts_wq19:50:113
12168992300,228cyclictest16847-21kworker/u16:1+efi_rts_wq20:25:142
12166992300,229cyclictest29715-21kworker/u16:0+efi_rts_wq22:35:330
12168992270,226cyclictest3819-21kworker/u16:1+efi_rts_wq00:15:152
12167992250,224cyclictest23660-21kworker/u16:2+efi_rts_wq23:45:121
12166992250,224cyclictest10577-21kworker/u16:3+efi_rts_wq21:00:150
12169992170,216cyclictest19723-21kworker/u16:4+efi_rts_wq00:00:133
12168992170,216cyclictest29715-21kworker/u16:0+efi_rts_wq23:15:402
12168992140,213cyclictest19723-21kworker/u16:4+efi_rts_wq23:50:462
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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