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2026-08-21 - 03:15

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 Thu Aug 20, 2026 12:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
291962339313,23sleep20-21swapper/207:05:132
306052320305,5sleep30-21swapper/307:09:553
304062314308,4sleep10-21swapper/107:07:201
303842314306,5sleep00-21swapper/007:07:020
30880993000,299cyclictest22258-21kworker/u16:0+efi_rts_wq12:33:401
30881992980,297cyclictest8544-21kworker/u16:2+efi_rts_wq10:15:122
30881992980,297cyclictest23641-21kworker/u16:0+efi_rts_wq08:30:132
30881992970,296cyclictest23641-21kworker/u16:0+efi_rts_wq07:10:112
30880992970,296cyclictest8544-21kworker/u16:2+efi_rts_wq10:25:131
30880992960,295cyclictest8544-21kworker/u16:2+efi_rts_wq09:30:131
30880992960,295cyclictest23641-21kworker/u16:0+efi_rts_wq10:35:151
30880992950,294cyclictest22258-21kworker/u16:0+efi_rts_wq12:05:131
30881992930,292cyclictest22732-21kworker/u16:3+efi_rts_wq11:10:122
30879992930,292cyclictest23641-21kworker/u16:0+efi_rts_wq10:20:130
30879992930,292cyclictest23641-21kworker/u16:0+efi_rts_wq10:20:120
30880992920,291cyclictest23641-21kworker/u16:0+efi_rts_wq08:50:151
30881992910,290cyclictest19331-21kworker/u16:2+efi_rts_wq11:45:132
30882992890,288cyclictest8544-21kworker/u16:2+efi_rts_wq10:05:133
30880992890,288cyclictest8544-21kworker/u16:2+efi_rts_wq08:40:141
30879992890,288cyclictest23641-21kworker/u16:0+efi_rts_wq08:50:150
30881992870,286cyclictest19331-21kworker/u16:2+efi_rts_wq12:35:142
30880992870,286cyclictest8544-21kworker/u16:2+efi_rts_wq08:12:481
30880992870,286cyclictest23641-21kworker/u16:0+efi_rts_wq08:15:121
30880992850,284cyclictest8544-21kworker/u16:2+efi_rts_wq09:45:111
30880992850,284cyclictest8544-21kworker/u16:2+efi_rts_wq08:00:131
30882992840,283cyclictest23641-21kworker/u16:0+efi_rts_wq10:13:123
30880992840,283cyclictest23641-21kworker/u16:0+efi_rts_wq07:20:111
30880992830,282cyclictest8544-21kworker/u16:2+efi_rts_wq07:50:091
30880992830,282cyclictest19331-21kworker/u16:2+efi_rts_wq12:35:131
30879992830,282cyclictest22258-21kworker/u16:0+efi_rts_wq11:58:330
30879992810,280cyclictest8544-21kworker/u16:2+efi_rts_wq09:35:130
30880992800,279cyclictest19331-21kworker/u16:2+efi_rts_wq11:50:121
30879992790,278cyclictest31476-21kworker/u16:1+efi_rts_wq11:18:260
30880992770,276cyclictest8544-21kworker/u16:2+efi_rts_wq07:17:411
30880992770,276cyclictest12063-21kworker/u16:3+efi_rts_wq11:40:121
30880992750,274cyclictest8544-21kworker/u16:2+efi_rts_wq07:30:111
30880992740,273cyclictest23641-21kworker/u16:0+efi_rts_wq09:13:011
30879992740,273cyclictest22258-21kworker/u16:0+efi_rts_wq12:00:110
30881992730,272cyclictest8544-21kworker/u16:2+efi_rts_wq08:25:122
30880992730,272cyclictest8544-21kworker/u16:2+efi_rts_wq07:25:131
30880992730,271cyclictest31476-21kworker/u16:1+efi_rts_wq11:05:131
30879992720,271cyclictest8544-21kworker/u16:2+efi_rts_wq08:42:550
30880992710,270cyclictest23641-21kworker/u16:0+efi_rts_wq10:03:111
30880992710,270cyclictest23641-21kworker/u16:0+efi_rts_wq09:40:131
30880992710,270cyclictest23641-21kworker/u16:0+efi_rts_wq08:05:141
30879992710,270cyclictest8544-21kworker/u16:2+efi_rts_wq08:45:110
30880992690,268cyclictest23641-21kworker/u16:0+efi_rts_wq10:30:131
30880992690,268cyclictest22258-21kworker/u16:0+efi_rts_wq12:10:111
30880992680,267cyclictest23641-21kworker/u16:0+efi_rts_wq08:37:541
30880992670,266cyclictest31476-21kworker/u16:1+efi_rts_wq11:00:121
30880992670,266cyclictest23641-21kworker/u16:0+efi_rts_wq08:30:131
30881992650,264cyclictest8544-21kworker/u16:2+efi_rts_wq09:15:112
30881992650,264cyclictest8544-21kworker/u16:2+efi_rts_wq07:40:122
30880992640,263cyclictest8544-21kworker/u16:2+efi_rts_wq07:40:121
30879992640,263cyclictest31476-21kworker/u16:1+efi_rts_wq11:05:120
30880992630,260cyclictest23641-21kworker/u16:0+efi_rts_wq09:05:121
30880992610,260cyclictest22732-21kworker/u16:3+efi_rts_wq10:45:131
30881992590,258cyclictest22732-21kworker/u16:3+efi_rts_wq10:53:202
30882992580,257cyclictest8544-21kworker/u16:2+efi_rts_wq07:25:133
30880992580,257cyclictest2192-21kworker/u16:0+efi_rts_wq11:25:151
30880992550,254cyclictest31476-21kworker/u16:1+efi_rts_wq11:35:131
30880992550,252cyclictest8544-21kworker/u16:2+efi_rts_wq08:55:131
30879992550,254cyclictest8544-21kworker/u16:2+efi_rts_wq07:50:110
30879992550,254cyclictest2192-21kworker/u16:0+efi_rts_wq11:25:140
30879992540,253cyclictest8544-21kworker/u16:2+efi_rts_wq09:50:130
30882992530,252cyclictest8544-21kworker/u16:2+efi_rts_wq07:30:123
30879992530,252cyclictest31476-21kworker/u16:1+efi_rts_wq11:35:120
30879992520,251cyclictest8544-21kworker/u16:2+efi_rts_wq07:42:450
30879992520,251cyclictest23641-21kworker/u16:0+efi_rts_wq07:10:110
30879992480,247cyclictest19331-21kworker/u16:2+efi_rts_wq12:13:360
30880992460,245cyclictest23641-21kworker/u16:0+efi_rts_wq10:40:121
30879992460,245cyclictest22732-21kworker/u16:3+efi_rts_wq10:55:110
30880992450,242cyclictest8544-21kworker/u16:2+efi_rts_wq07:55:121
30879992450,244cyclictest23641-21kworker/u16:0+efi_rts_wq08:05:140
30880992430,242cyclictest23641-21kworker/u16:0+efi_rts_wq08:22:501
30882992420,241cyclictest22732-21kworker/u16:3+efi_rts_wq10:55:123
30879992420,241cyclictest23641-21kworker/u16:0+efi_rts_wq09:55:120
30881992410,240cyclictest19331-21kworker/u16:2+efi_rts_wq12:30:122
30880992410,240cyclictest8544-21kworker/u16:2+efi_rts_wq08:27:511
30880992410,240cyclictest23641-21kworker/u16:0+efi_rts_wq07:45:111
30880992380,237cyclictest8544-21kworker/u16:2+efi_rts_wq09:35:141
30882992371,235cyclictest8544-21kworker/u16:2+efi_rts_wq10:43:183
30880992370,236cyclictest22258-21kworker/u16:0+efi_rts_wq12:00:111
30882992350,233cyclictest31476-21kworker/u16:1+efi_rts_wq11:15:133
30880992330,232cyclictest8544-21kworker/u16:2+efi_rts_wq10:18:121
30880992330,232cyclictest22258-21kworker/u16:0+efi_rts_wq12:25:121
30881992320,231cyclictest31476-21kworker/u16:1+efi_rts_wq11:43:302
30880992320,231cyclictest19331-21kworker/u16:2+efi_rts_wq12:15:091
30879992310,230cyclictest23641-21kworker/u16:0+efi_rts_wq08:15:120
30879992290,228cyclictest8544-21kworker/u16:2+efi_rts_wq09:10:130
30880992280,227cyclictest8544-21kworker/u16:2+efi_rts_wq09:25:121
30879992280,227cyclictest31476-21kworker/u16:1+efi_rts_wq11:20:110
30879992280,227cyclictest22258-21kworker/u16:0+efi_rts_wq12:20:130
30882992250,224cyclictest23641-21kworker/u16:0+efi_rts_wq08:35:143
30879992220,221cyclictest22258-21kworker/u16:0+efi_rts_wq12:08:340
30880992210,220cyclictest23641-21kworker/u16:0+efi_rts_wq10:10:131
30879992210,220cyclictest19331-21kworker/u16:2+efi_rts_wq11:48:310
30881992200,218cyclictest23641-21kworker/u16:0+efi_rts_wq08:20:112
30881992190,218cyclictest8544-21kworker/u16:2+efi_rts_wq07:15:012
30879992190,216cyclictest31476-21kworker/u16:1+efi_rts_wq11:00:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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