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2025-11-17 - 15:22

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 Mon Nov 17, 2025 00:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
213802321311,8sleep30-21swapper/319:07:543
213932319312,4sleep10-21swapper/119:08:031
212032318303,5sleep00-21swapper/019:05:380
211902317309,5sleep20-21swapper/219:05:282
21811993040,302cyclictest18490-21kworker/u16:2+efi_rts_wq23:55:143
21810993010,299cyclictest25400-21kworker/u16:2+efi_rts_wq20:45:132
21811992990,298cyclictest8927-21kworker/u16:1+efi_rts_wq23:35:133
21809992990,298cyclictest6560-21kworker/u16:0+efi_rts_wq19:55:141
21810992970,296cyclictest28657-21kworker/u16:1+efi_rts_wq22:29:562
21811992960,295cyclictest11945-21kworker/u16:2+efi_rts_wq20:24:313
21808992960,295cyclictest17015-21kworker/u16:1+efi_rts_wq22:49:590
21811992950,294cyclictest1442-21kworker/u16:3+efi_rts_wq21:35:163
21808992940,293cyclictest28657-21kworker/u16:1+efi_rts_wq22:00:150
21811992930,292cyclictest6560-21kworker/u16:0+efi_rts_wq20:05:163
21811992910,290cyclictest2474-21kworker/u16:0+efi_rts_wq19:30:153
21809992910,290cyclictest911-21kworker/u16:0+efi_rts_wq00:35:161
21809992910,290cyclictest21828-21kworker/u16:1+efi_rts_wq19:10:171
21811992900,289cyclictest19121-21kworker/u16:3+efi_rts_wq19:44:233
21809992900,289cyclictest32625-21kworker/u16:1+efi_rts_wq19:35:141
21808992900,289cyclictest2021-21kworker/u16:2+efi_rts_wq23:25:140
21810992890,287cyclictest17015-21kworker/u16:1+efi_rts_wq23:05:032
21809992890,288cyclictest2474-21kworker/u16:2+efi_rts_wq23:10:041
21808992890,288cyclictest28657-21kworker/u16:1+efi_rts_wq22:30:160
21810992870,286cyclictest11945-21kworker/u16:2+efi_rts_wq20:25:142
21810992870,285cyclictest28657-21kworker/u16:1+efi_rts_wq22:30:162
21810992850,284cyclictest9187-21kworker/u16:0+efi_rts_wq22:55:002
21810992850,284cyclictest24864-21kworker/u16:3+efi_rts_wq00:10:162
21810992840,283cyclictest19102-21kworker/u16:3+efi_rts_wq20:30:142
21809992840,283cyclictest911-21kworker/u16:0+efi_rts_wq00:30:171
21808992840,283cyclictest26986-21kworker/u16:1+efi_rts_wq00:20:160
21809992810,280cyclictest4029-21kworker/u16:2+efi_rts_wq21:15:171
21809992810,280cyclictest27524-21kworker/u16:0+efi_rts_wq20:40:161
21809992810,280cyclictest2474-21kworker/u16:2+efi_rts_wq22:25:131
21808992800,279cyclictest2474-21kworker/u16:2+efi_rts_wq23:10:160
21811992780,277cyclictest11679-21kworker/u16:1+efi_rts_wq21:20:173
21808992780,277cyclictest2474-21kworker/u16:2+efi_rts_wq22:20:120
21809992760,275cyclictest26986-21kworker/u16:1+efi_rts_wq00:15:151
21811992740,273cyclictest27524-21kworker/u16:0+efi_rts_wq20:50:143
21810992740,272cyclictest26405-21kworker/u16:0+efi_rts_wq23:40:122
21809992740,273cyclictest2474-21kworker/u16:2+efi_rts_wq22:40:131
21808992740,272cyclictest26405-21kworker/u16:0+efi_rts_wq23:05:170
21809992720,271cyclictest4029-21kworker/u16:2+efi_rts_wq21:04:381
21810992710,270cyclictest4405-21kworker/u16:1+efi_rts_wq19:45:142
21810992700,269cyclictest24326-21kworker/u16:0+efi_rts_wq21:50:132
21809992700,269cyclictest2474-21kworker/u16:0+efi_rts_wq19:15:131
21811992690,268cyclictest2474-21kworker/u16:2+efi_rts_wq23:00:013
21810992690,268cyclictest19121-21kworker/u16:3+efi_rts_wq19:20:132
21809992690,268cyclictest1442-21kworker/u16:3+efi_rts_wq21:05:151
21811992680,267cyclictest26405-21kworker/u16:0+efi_rts_wq00:06:213
21809992670,266cyclictest2474-21kworker/u16:0+efi_rts_wq19:25:121
21810992650,264cyclictest26405-21kworker/u16:0+efi_rts_wq00:01:192
21811992640,263cyclictest2474-21kworker/u16:2+efi_rts_wq22:14:533
21811992630,262cyclictest27524-21kworker/u16:0+efi_rts_wq20:49:353
21810992630,262cyclictest911-21kworker/u16:0+efi_rts_wq00:30:162
21810992630,262cyclictest19121-21kworker/u16:3+efi_rts_wq19:40:172
21809992620,261cyclictest25400-21kworker/u16:2+efi_rts_wq20:35:151
21809992610,260cyclictest8670-21kworker/u16:1+efi_rts_wq20:00:171
21809992610,260cyclictest17015-21kworker/u16:1+efi_rts_wq22:55:161
21811992600,259cyclictest1442-21kworker/u16:3+efi_rts_wq21:45:153
21811992600,259cyclictest1442-21kworker/u16:3+efi_rts_wq21:40:153
21810992600,258cyclictest28657-21kworker/u16:1+efi_rts_wq22:35:152
21809992590,258cyclictest26986-21kworker/u16:1+efi_rts_wq00:25:141
21809992590,258cyclictest26405-21kworker/u16:0+efi_rts_wq23:30:161
21809992590,258cyclictest26405-21kworker/u16:0+efi_rts_wq23:30:151
21811992580,257cyclictest19121-21kworker/u16:3+efi_rts_wq19:25:123
21811992560,255cyclictest6560-21kworker/u16:0+efi_rts_wq20:04:263
21809992560,255cyclictest6560-21kworker/u16:0+efi_rts_wq19:54:251
21810992550,254cyclictest2474-21kworker/u16:2+efi_rts_wq23:00:132
21808992550,253cyclictest26405-21kworker/u16:0+efi_rts_wq00:00:130
21811992530,252cyclictest2299-21kworker/u16:2+efi_rts_wq19:39:213
21809992530,252cyclictest2474-21kworker/u16:2+efi_rts_wq22:50:141
21811992520,251cyclictest26405-21kworker/u16:0+efi_rts_wq23:30:163
21811992520,251cyclictest26405-21kworker/u16:0+efi_rts_wq23:30:153
21811992520,251cyclictest26405-21kworker/u16:0+efi_rts_wq00:00:143
21809992520,249cyclictest31070-21kworker/u16:0+efi_rts_wq22:05:161
21808992520,251cyclictest2474-21kworker/u16:2+efi_rts_wq22:15:130
21809992500,249cyclictest21214-21kworker/u16:1+efi_rts_wq20:29:311
21810992480,247cyclictest21828-21kworker/u16:1+efi_rts_wq19:14:182
21811992470,246cyclictest31723-21kworker/u16:1+efi_rts_wq20:55:123
21809992470,246cyclictest19121-21kworker/u16:3+efi_rts_wq19:40:171
21810992460,244cyclictest2474-21kworker/u16:0+efi_rts_wq19:15:132
21808992460,245cyclictest26562-21kworker/u16:2+efi_rts_wq21:55:180
21809992440,243cyclictest2474-21kworker/u16:2+efi_rts_wq22:45:131
21809992440,243cyclictest1442-21kworker/u16:3+efi_rts_wq21:35:171
21808992430,242cyclictest1442-21kworker/u16:3+efi_rts_wq21:25:150
21811992420,241cyclictest26405-21kworker/u16:0+efi_rts_wq23:51:183
21810992420,241cyclictest28657-21kworker/u16:1+efi_rts_wq22:10:142
21809992420,241cyclictest16954-21kworker/u16:1+efi_rts_wq20:14:291
21809992410,240cyclictest20105-21kworker/u16:2+efi_rts_wq21:45:151
21810992360,235cyclictest14574-21kworker/u16:3+efi_rts_wq20:10:152
21809992360,235cyclictest28657-21kworker/u16:1+efi_rts_wq22:10:131
21811992340,233cyclictest1442-21kworker/u16:3+efi_rts_wq21:25:143
21808992340,233cyclictest26405-21kworker/u16:0+efi_rts_wq23:15:150
21808992340,233cyclictest16954-21kworker/u16:1+efi_rts_wq20:15:150
21811992330,232cyclictest16954-21kworker/u16:1+efi_rts_wq20:15:143
21811992320,231cyclictest4029-21kworker/u16:2+efi_rts_wq21:10:163
21811992320,231cyclictest28657-21kworker/u16:1+efi_rts_wq21:59:513
21809992320,229cyclictest2474-21kworker/u16:2+efi_rts_wq22:15:131
21808992320,231cyclictest26986-21kworker/u16:1+efi_rts_wq00:25:140
21811992310,230cyclictest26405-21kworker/u16:0+efi_rts_wq23:40:093
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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