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2026-08-25 - 13:33

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 100 highest latencies:
System rackcslot3s.osadl.org (updated Tue Aug 25, 2026 00:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
303302323309,4sleep20-21swapper/219:06:132
306012316308,5sleep30-21swapper/319:09:423
303122314306,5sleep10-21swapper/119:06:011
303062313306,5sleep00-21swapper/019:05:560
30891992990,298cyclictest30497-21kworker/u16:1+efi_rts_wq20:30:141
30893992980,297cyclictest30497-21kworker/u16:1+efi_rts_wq22:00:223
30891992980,297cyclictest30497-21kworker/u16:1+efi_rts_wq20:50:131
30891992970,296cyclictest30497-21kworker/u16:1+efi_rts_wq21:55:221
30890992970,296cyclictest30497-21kworker/u16:1+efi_rts_wq20:45:130
30893992960,295cyclictest30497-21kworker/u16:1+efi_rts_wq20:35:053
30890992950,294cyclictest27562-21kworker/u16:3+efi_rts_wq00:10:140
30891992930,292cyclictest2490-21kworker/u16:2+efi_rts_wq00:00:101
30890992920,291cyclictest10578-21kworker/u16:4+efi_rts_wq19:10:120
30893992900,288cyclictest2490-21kworker/u16:2+efi_rts_wq23:10:133
30892992900,289cyclictest30497-21kworker/u16:1+efi_rts_wq21:00:132
30891992900,289cyclictest19204-21kworker/u16:0+efi_rts_wq00:05:471
30893992890,288cyclictest27562-21kworker/u16:3+efi_rts_wq00:10:143
30890992890,288cyclictest10578-21kworker/u16:4+efi_rts_wq19:29:520
30892992880,287cyclictest20172-21kworker/u16:0+efi_rts_wq20:20:132
30891992880,287cyclictest19204-21kworker/u16:0+efi_rts_wq23:55:101
30893992870,286cyclictest30497-21kworker/u16:1+efi_rts_wq22:55:133
30891992860,285cyclictest20172-21kworker/u16:0+efi_rts_wq20:15:151
30890992860,283cyclictest20172-21kworker/u16:0+efi_rts_wq21:10:120
30893992850,284cyclictest27562-21kworker/u16:3+efi_rts_wq00:20:083
30891992840,283cyclictest27562-21kworker/u16:3+efi_rts_wq00:35:111
30890992840,283cyclictest32362-21kworker/u16:0+efi_rts_wq23:00:140
30893992830,282cyclictest30497-21kworker/u16:1+efi_rts_wq21:15:153
30893992820,281cyclictest20172-21kworker/u16:0+efi_rts_wq21:50:113
30892992820,280cyclictest22158-21kworker/u16:3+efi_rts_wq22:40:122
30893992800,278cyclictest30497-21kworker/u16:1+efi_rts_wq20:25:133
30892992800,279cyclictest20172-21kworker/u16:0+efi_rts_wq22:10:112
30891992800,279cyclictest10578-21kworker/u16:4+efi_rts_wq19:25:181
30893992790,277cyclictest19204-21kworker/u16:0+efi_rts_wq23:55:093
30892992790,278cyclictest30497-21kworker/u16:1+efi_rts_wq20:30:142
30892992780,277cyclictest24712-21kworker/u16:2+efi_rts_wq22:45:322
30890992780,277cyclictest19204-21kworker/u16:0+efi_rts_wq23:55:080
30893992770,276cyclictest20172-21kworker/u16:0+efi_rts_wq21:20:133
30893992760,275cyclictest9909-21kworker/u16:1+efi_rts_wq23:35:403
30893992750,274cyclictest22158-21kworker/u16:3+efi_rts_wq22:40:123
30893992750,274cyclictest11579-21kworker/u16:2+efi_rts_wq19:50:123
30892992750,274cyclictest20172-21kworker/u16:0+efi_rts_wq21:05:122
30893992740,273cyclictest20172-21kworker/u16:0+efi_rts_wq20:55:123
30892992740,273cyclictest32362-21kworker/u16:0+efi_rts_wq23:00:132
30892992740,273cyclictest30497-21kworker/u16:1+efi_rts_wq21:30:142
30890992730,272cyclictest19204-21kworker/u16:0+efi_rts_wq00:05:150
30891992720,271cyclictest20172-21kworker/u16:0+efi_rts_wq20:05:141
30890992720,270cyclictest30497-21kworker/u16:1+efi_rts_wq22:35:290
30890992720,269cyclictest10578-21kworker/u16:4+efi_rts_wq19:15:020
30893992700,269cyclictest32586-21kworker/u16:1+efi_rts_wq00:25:143
30893992700,269cyclictest30497-21kworker/u16:1+efi_rts_wq21:35:123
30893992690,268cyclictest5028-21kworker/u16:3+efi_rts_wq23:20:383
30891992670,266cyclictest2490-21kworker/u16:2+efi_rts_wq23:15:151
30893992650,264cyclictest32586-21kworker/u16:1+efi_rts_wq00:30:133
30893992650,264cyclictest10578-21kworker/u16:4+efi_rts_wq19:30:113
30890992640,263cyclictest9909-21kworker/u16:1+efi_rts_wq23:30:120
30893992620,261cyclictest30497-21kworker/u16:1+efi_rts_wq20:10:133
30891992610,260cyclictest30497-21kworker/u16:1+efi_rts_wq22:55:141
30891992610,259cyclictest24712-21kworker/u16:2+efi_rts_wq22:45:131
30893992580,255cyclictest30497-21kworker/u16:1+efi_rts_wq21:55:133
30890992570,256cyclictest22158-21kworker/u16:3+efi_rts_wq22:40:120
30890992550,254cyclictest20172-21kworker/u16:0+efi_rts_wq21:50:110
30892992540,252cyclictest30497-21kworker/u16:1+efi_rts_wq23:05:142
30891992530,252cyclictest30497-21kworker/u16:1+efi_rts_wq19:55:151
30892992520,251cyclictest30497-21kworker/u16:1+efi_rts_wq19:19:512
30890992520,251cyclictest2490-21kworker/u16:2+efi_rts_wq23:25:120
30890992500,249cyclictest20172-21kworker/u16:0+efi_rts_wq21:15:140
30892992470,244cyclictest30497-21kworker/u16:1+efi_rts_wq21:35:122
30891992470,246cyclictest10578-21kworker/u16:4+efi_rts_wq19:45:141
30890992460,245cyclictest30497-21kworker/u16:1+efi_rts_wq21:25:110
30890992450,244cyclictest30497-21kworker/u16:1+efi_rts_wq22:30:130
30890992450,244cyclictest30497-21kworker/u16:1+efi_rts_wq19:35:130
30890992430,242cyclictest27562-21kworker/u16:3+efi_rts_wq00:15:480
30893992420,241cyclictest20172-21kworker/u16:0+efi_rts_wq22:10:243
30893992390,238cyclictest30497-21kworker/u16:1+efi_rts_wq23:05:133
30893992380,236cyclictest20172-21kworker/u16:0+efi_rts_wq22:05:143
30893992370,236cyclictest20172-21kworker/u16:0+efi_rts_wq21:00:113
30891992370,236cyclictest32586-21kworker/u16:1+efi_rts_wq00:25:501
30891992370,236cyclictest2490-21kworker/u16:2+efi_rts_wq23:35:241
30891992340,233cyclictest30497-21kworker/u16:1+efi_rts_wq19:15:141
30890992330,232cyclictest30497-21kworker/u16:1+efi_rts_wq22:20:260
30890992330,232cyclictest30497-21kworker/u16:1+efi_rts_wq22:20:260
30890992280,227cyclictest2490-21kworker/u16:2+efi_rts_wq23:20:120
30891992270,226cyclictest30497-21kworker/u16:1+efi_rts_wq21:45:171
30892992260,225cyclictest20172-21kworker/u16:0+efi_rts_wq20:15:142
30893992250,224cyclictest20172-21kworker/u16:0+efi_rts_wq22:15:133
30891992250,224cyclictest20172-21kworker/u16:0+efi_rts_wq22:05:151
30893992240,223cyclictest20172-21kworker/u16:0+efi_rts_wq22:35:113
30890992240,223cyclictest20172-21kworker/u16:0+efi_rts_wq22:15:130
30892992190,218cyclictest19204-21kworker/u16:0+efi_rts_wq23:50:432
30893992180,217cyclictest24712-21kworker/u16:2+efi_rts_wq22:45:133
30891992180,217cyclictest20172-21kworker/u16:0+efi_rts_wq22:35:121
30890992130,212cyclictest20172-21kworker/u16:0+efi_rts_wq21:20:140
30893992120,211cyclictest30497-21kworker/u16:1+efi_rts_wq21:25:163
30893992120,211cyclictest27562-21kworker/u16:3+efi_rts_wq00:35:513
30891992050,204cyclictest22158-21kworker/u16:3+efi_rts_wq22:40:301
30893992040,203cyclictest30497-21kworker/u16:1+efi_rts_wq22:30:133
30893992030,202cyclictest30497-21kworker/u16:1+efi_rts_wq19:55:143
30892992030,202cyclictest30497-21kworker/u16:1+efi_rts_wq20:50:132
30891992030,202cyclictest20172-21kworker/u16:0+efi_rts_wq20:55:111
30893992010,200cyclictest30497-21kworker/u16:1+efi_rts_wq19:44:553
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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