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2026-05-31 - 00:21

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 Sat May 30, 2026 12:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19442318311,5sleep30-21swapper/307:05:263
20612317303,5sleep00-21swapper/007:06:550
21782315308,5sleep20-21swapper/207:08:252
19422314307,4sleep10-21swapper/107:05:241
2566993010,300cyclictest7559-21kworker/u16:2+efi_rts_wq11:25:112
2564992990,298cyclictest30805-21kworker/u16:1+efi_rts_wq09:20:140
2564992980,297cyclictest17080-21kworker/u16:0+efi_rts_wq11:33:210
2566992970,296cyclictest12301-21kworker/u16:5+efi_rts_wq12:10:122
2565992970,296cyclictest30805-21kworker/u16:1+efi_rts_wq07:47:401
2567992960,295cyclictest28319-21kworker/u16:0+efi_rts_wq10:25:123
2565992960,295cyclictest3565-21kworker/u16:3+efi_rts_wq10:40:121
2565992950,294cyclictest12301-21kworker/u16:5+efi_rts_wq11:13:181
2565992940,293cyclictest28319-21kworker/u16:0+efi_rts_wq09:12:561
2564992940,293cyclictest17080-21kworker/u16:0+efi_rts_wq12:38:340
2565992930,292cyclictest28319-21kworker/u16:0+efi_rts_wq11:00:121
2565992930,292cyclictest28319-21kworker/u16:0+efi_rts_wq11:00:121
2564992930,292cyclictest17080-21kworker/u16:0+efi_rts_wq12:33:330
2564992920,291cyclictest28319-21kworker/u16:0+efi_rts_wq09:17:570
2567992910,290cyclictest3565-21kworker/u16:3+efi_rts_wq09:45:133
2567992910,290cyclictest28319-21kworker/u16:0+efi_rts_wq11:08:163
2565992910,290cyclictest17080-21kworker/u16:0+efi_rts_wq12:20:131
2565992900,289cyclictest30805-21kworker/u16:1+efi_rts_wq07:25:131
2565992890,288cyclictest30805-21kworker/u16:1+efi_rts_wq07:40:111
2565992890,288cyclictest28319-21kworker/u16:0+efi_rts_wq08:25:121
2565992890,288cyclictest17080-21kworker/u16:0+efi_rts_wq11:50:141
2564992890,288cyclictest1063-21kworker/u16:1+efi_rts_wq12:00:110
2567992880,287cyclictest30805-21kworker/u16:1+efi_rts_wq09:40:123
2565992860,285cyclictest17080-21kworker/u16:0+efi_rts_wq11:30:131
2564992860,285cyclictest30805-21kworker/u16:1+efi_rts_wq07:25:130
2564992850,284cyclictest28319-21kworker/u16:0+efi_rts_wq08:05:150
2567992840,283cyclictest30805-21kworker/u16:1+efi_rts_wq07:15:133
2567992840,283cyclictest12301-21kworker/u16:5+efi_rts_wq12:05:123
2566992830,282cyclictest3565-21kworker/u16:3+efi_rts_wq10:40:122
2565992830,282cyclictest3565-21kworker/u16:3+efi_rts_wq09:55:131
2565992820,281cyclictest28319-21kworker/u16:0+efi_rts_wq07:15:131
2566992810,280cyclictest30805-21kworker/u16:1+efi_rts_wq08:10:132
2565992810,280cyclictest30805-21kworker/u16:1+efi_rts_wq08:40:121
2567992790,278cyclictest30805-21kworker/u16:1+efi_rts_wq07:10:143
2567992760,275cyclictest30805-21kworker/u16:1+efi_rts_wq08:42:503
2567992760,275cyclictest28319-21kworker/u16:0+efi_rts_wq08:17:463
2565992760,275cyclictest28319-21kworker/u16:0+efi_rts_wq08:35:121
2564992760,275cyclictest28319-21kworker/u16:0+efi_rts_wq08:20:120
2565992740,273cyclictest12301-21kworker/u16:5+efi_rts_wq12:35:121
2566992730,272cyclictest17080-21kworker/u16:0+efi_rts_wq11:30:122
2565992730,272cyclictest30805-21kworker/u16:1+efi_rts_wq09:05:131
2565992730,272cyclictest28319-21kworker/u16:0+efi_rts_wq07:22:361
2564992730,272cyclictest28319-21kworker/u16:0+efi_rts_wq10:45:120
2567992720,270cyclictest28319-21kworker/u16:0+efi_rts_wq09:30:133
2565992700,269cyclictest30805-21kworker/u16:1+efi_rts_wq08:45:141
2565992700,269cyclictest12301-21kworker/u16:5+efi_rts_wq11:45:101
2567992690,267cyclictest28319-21kworker/u16:0+efi_rts_wq11:15:123
2564992690,268cyclictest30805-21kworker/u16:1+efi_rts_wq07:52:410
2564992690,268cyclictest17080-21kworker/u16:0+efi_rts_wq12:23:310
2564992680,266cyclictest30805-21kworker/u16:1+efi_rts_wq08:00:130
2566992670,266cyclictest28319-21kworker/u16:0+efi_rts_wq11:15:122
2566992660,265cyclictest28319-21kworker/u16:0+efi_rts_wq07:30:122
2564992660,265cyclictest28319-21kworker/u16:0+efi_rts_wq08:15:120
2566992630,262cyclictest3565-21kworker/u16:3+efi_rts_wq10:10:132
2567992620,261cyclictest28319-21kworker/u16:0+efi_rts_wq10:33:113
2566992620,261cyclictest3565-21kworker/u16:3+efi_rts_wq10:30:102
2566992620,261cyclictest12301-21kworker/u16:5+efi_rts_wq11:45:112
2564992620,261cyclictest3565-21kworker/u16:3+efi_rts_wq10:50:130
2566992610,258cyclictest30805-21kworker/u16:1+efi_rts_wq09:15:142
2566992600,259cyclictest30805-21kworker/u16:1+efi_rts_wq08:05:142
2567992580,257cyclictest28319-21kworker/u16:0+efi_rts_wq10:00:113
2566992560,255cyclictest12301-21kworker/u16:5+efi_rts_wq12:30:122
2564992560,255cyclictest30805-21kworker/u16:1+efi_rts_wq09:00:110
2564992550,254cyclictest28319-21kworker/u16:0+efi_rts_wq09:27:580
2564992530,252cyclictest12301-21kworker/u16:5+efi_rts_wq11:48:240
2567992520,251cyclictest7559-21kworker/u16:2+efi_rts_wq11:20:123
2565992500,249cyclictest30805-21kworker/u16:1+efi_rts_wq09:25:121
2564992500,248cyclictest28319-21kworker/u16:0+efi_rts_wq11:15:130
2567992490,248cyclictest30805-21kworker/u16:1+efi_rts_wq08:30:123
2566992490,248cyclictest28319-21kworker/u16:0+efi_rts_wq10:45:122
2564992490,248cyclictest30805-21kworker/u16:1+efi_rts_wq08:35:130
2564992490,248cyclictest28319-21kworker/u16:0+efi_rts_wq10:35:140
2567992470,246cyclictest30805-21kworker/u16:1+efi_rts_wq09:22:583
2567992470,245cyclictest28319-21kworker/u16:0+efi_rts_wq10:55:143
2565992470,246cyclictest12301-21kworker/u16:5+efi_rts_wq12:15:121
2564992460,245cyclictest28319-21kworker/u16:0+efi_rts_wq08:55:120
2567992450,244cyclictest30805-21kworker/u16:1+efi_rts_wq07:20:133
2567992450,244cyclictest28319-21kworker/u16:0+efi_rts_wq09:38:003
2566992450,244cyclictest17080-21kworker/u16:0+efi_rts_wq11:43:232
2567992430,242cyclictest3565-21kworker/u16:3+efi_rts_wq10:20:153
2567992430,242cyclictest30805-21kworker/u16:1+efi_rts_wq07:35:123
2566992410,240cyclictest28319-21kworker/u16:0+efi_rts_wq10:55:142
2567992400,239cyclictest28319-21kworker/u16:0+efi_rts_wq09:02:543
2564992380,237cyclictest28319-21kworker/u16:0+efi_rts_wq10:25:120
2567992370,236cyclictest30805-21kworker/u16:1+efi_rts_wq07:45:123
2567992360,235cyclictest28319-21kworker/u16:0+efi_rts_wq10:35:143
2565992350,234cyclictest28319-21kworker/u16:0+efi_rts_wq10:00:121
2567992320,231cyclictest12301-21kworker/u16:5+efi_rts_wq11:55:113
2565992320,231cyclictest30805-21kworker/u16:1+efi_rts_wq09:15:141
2566992260,225cyclictest19365-21kworker/u16:3+efi_rts_wq11:35:132
2564992260,225cyclictest3565-21kworker/u16:3+efi_rts_wq10:20:150
2564992250,224cyclictest3565-21kworker/u16:3+efi_rts_wq10:15:140
2564992240,223cyclictest3565-21kworker/u16:3+efi_rts_wq11:05:140
2566992210,220cyclictest30805-21kworker/u16:1+efi_rts_wq07:42:402
2567992200,219cyclictest17080-21kworker/u16:0+efi_rts_wq12:25:133
2564992200,219cyclictest7559-21kworker/u16:2+efi_rts_wq11:25:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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