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2025-07-01 - 07:50

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 50 highest latencies:
System rackcslot3s.osadl.org (updated Mon Jun 30, 2025 12:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
143282319311,5sleep30-21swapper/307:09:233
142992316309,5sleep10-21swapper/107:09:011
140932316303,4sleep20-21swapper/207:06:222
140642316310,4sleep00-21swapper/007:06:000
14642992970,296cyclictest24958-21kworker/u16:3+efi_rts_wq09:10:173
14639992950,294cyclictest25194-21kworker/u16:0+efi_rts_wq08:10:120
14641992931,291cyclictest16388-21kworker/u16:1+efi_rts_wq09:20:192
14641992930,291cyclictest30851-21kworker/u16:2+efi_rts_wq10:35:162
14639992930,292cyclictest24432-21kworker/u16:2+efi_rts_wq11:30:140
14639992930,292cyclictest15286-21kworker/u16:2+efi_rts_wq10:13:190
14640992920,291cyclictest11754-21kworker/u16:0+efi_rts_wq10:55:141
14642992910,290cyclictest1072-21kworker/u16:1+efi_rts_wq11:58:353
14640992900,289cyclictest16388-21kworker/u16:1+efi_rts_wq10:00:191
14641992890,288cyclictest24432-21kworker/u16:2+efi_rts_wq12:28:392
14641992880,287cyclictest25194-21kworker/u16:0+efi_rts_wq08:22:572
14641992880,287cyclictest19746-21kworker/u16:1+efi_rts_wq08:05:162
14639992880,287cyclictest1072-21kworker/u16:1+efi_rts_wq12:30:160
14641992870,286cyclictest25194-21kworker/u16:0+efi_rts_wq08:15:152
14639992870,286cyclictest28218-21kworker/u16:0+efi_rts_wq10:20:170
14640992860,285cyclictest26637-21kworker/u16:2+efi_rts_wq07:20:121
14641992850,284cyclictest11754-21kworker/u16:0+efi_rts_wq10:55:142
14640992850,284cyclictest16388-21kworker/u16:1+efi_rts_wq09:38:121
14639992850,283cyclictest27083-21kworker/u16:0+efi_rts_wq11:20:160
14642992840,283cyclictest1072-21kworker/u16:1+efi_rts_wq12:33:393
14639992840,283cyclictest19746-21kworker/u16:1+efi_rts_wq07:27:480
14642992820,281cyclictest30851-21kworker/u16:2+efi_rts_wq10:33:233
14639992810,280cyclictest24958-21kworker/u16:3+efi_rts_wq09:03:050
14642992800,278cyclictest23969-21kworker/u16:3+efi_rts_wq11:00:163
14639992790,278cyclictest19746-21kworker/u16:1+efi_rts_wq07:40:140
14640992780,277cyclictest1072-21kworker/u16:1+efi_rts_wq12:25:141
14639992780,277cyclictest16388-21kworker/u16:1+efi_rts_wq09:30:200
14640992770,276cyclictest25194-21kworker/u16:0+efi_rts_wq07:50:161
14640992770,276cyclictest23969-21kworker/u16:3+efi_rts_wq10:45:161
14639992750,273cyclictest30851-21kworker/u16:2+efi_rts_wq10:50:160
14641992740,273cyclictest28218-21kworker/u16:0+efi_rts_wq10:30:172
14640992740,273cyclictest24432-21kworker/u16:2+efi_rts_wq12:05:181
14642992730,272cyclictest30851-21kworker/u16:2+efi_rts_wq10:38:243
14641992730,272cyclictest1072-21kworker/u16:1+efi_rts_wq11:50:172
14642992720,271cyclictest26637-21kworker/u16:2+efi_rts_wq07:10:123
14642992720,271cyclictest16388-21kworker/u16:1+efi_rts_wq10:10:183
14642992720,271cyclictest16388-21kworker/u16:1+efi_rts_wq09:58:163
14639992700,269cyclictest16388-21kworker/u16:1+efi_rts_wq09:45:170
14642992690,268cyclictest24432-21kworker/u16:2+efi_rts_wq11:40:133
14641992660,265cyclictest16388-21kworker/u16:1+efi_rts_wq08:55:192
14640992650,264cyclictest23969-21kworker/u16:3+efi_rts_wq11:00:151
14642992640,263cyclictest25194-21kworker/u16:0+efi_rts_wq08:10:123
14640992640,263cyclictest1072-21kworker/u16:1+efi_rts_wq12:00:141
14642992620,261cyclictest1072-21kworker/u16:1+efi_rts_wq12:15:143
14640992620,261cyclictest25194-21kworker/u16:0+efi_rts_wq08:45:151
14639992620,261cyclictest24958-21kworker/u16:3+efi_rts_wq09:05:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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