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2026-09-19 - 22:55

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 Sep 19, 2026 12:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
183632321306,5sleep20-21swapper/207:08:482
182162317310,5sleep30-21swapper/307:06:563
183572315307,5sleep10-21swapper/107:08:431
183042314306,5sleep00-21swapper/007:08:010
18835993090,308cyclictest9183-21kworker/u16:2+efi_rts_wq09:55:140
18838993070,305cyclictest498-21kworker/u16:2+efi_rts_wq11:35:142
18837993070,306cyclictest19921-21kworker/u16:1+efi_rts_wq08:20:151
18837993040,303cyclictest1015-21kworker/u16:3+efi_rts_wq09:50:121
18840993030,302cyclictest9183-21kworker/u16:2+efi_rts_wq10:35:143
18835993030,301cyclictest9846-21kworker/u16:1+efi_rts_wq12:10:130
18840993020,300cyclictest9846-21kworker/u16:1+efi_rts_wq11:58:113
18835993020,301cyclictest19921-21kworker/u16:1+efi_rts_wq07:30:120
18840993010,300cyclictest19921-21kworker/u16:1+efi_rts_wq07:22:213
18838993010,300cyclictest9183-21kworker/u16:2+efi_rts_wq08:55:142
18840993000,299cyclictest9183-21kworker/u16:2+efi_rts_wq08:00:123
18838992990,297cyclictest1015-21kworker/u16:3+efi_rts_wq11:15:132
18840992980,297cyclictest498-21kworker/u16:2+efi_rts_wq11:30:163
18840992980,296cyclictest9183-21kworker/u16:2+efi_rts_wq09:20:143
18840992970,296cyclictest1015-21kworker/u16:3+efi_rts_wq09:15:153
18838992970,296cyclictest12220-21kworker/u16:3+efi_rts_wq12:05:122
18837992960,295cyclictest1015-21kworker/u16:3+efi_rts_wq11:15:131
18838992950,294cyclictest9183-21kworker/u16:2+efi_rts_wq09:32:442
18835992950,294cyclictest19921-21kworker/u16:1+efi_rts_wq07:35:130
18840992940,293cyclictest1015-21kworker/u16:3+efi_rts_wq10:58:003
18840992940,292cyclictest12220-21kworker/u16:3+efi_rts_wq12:00:163
18838992940,293cyclictest9183-21kworker/u16:2+efi_rts_wq07:25:132
18838992940,293cyclictest19921-21kworker/u16:1+efi_rts_wq08:50:122
18838992930,292cyclictest9183-21kworker/u16:2+efi_rts_wq07:10:132
18838992920,291cyclictest498-21kworker/u16:2+efi_rts_wq11:33:072
18838992920,291cyclictest26400-21kworker/u16:0+efi_rts_wq11:13:042
18840992910,290cyclictest9183-21kworker/u16:2+efi_rts_wq08:40:153
18837992910,290cyclictest1015-21kworker/u16:3+efi_rts_wq11:10:141
18835992910,290cyclictest1015-21kworker/u16:3+efi_rts_wq11:23:050
18838992900,289cyclictest12220-21kworker/u16:3+efi_rts_wq12:35:142
18835992900,289cyclictest12220-21kworker/u16:3+efi_rts_wq11:53:100
18838992890,288cyclictest9183-21kworker/u16:2+efi_rts_wq07:45:142
18840992880,287cyclictest9183-21kworker/u16:2+efi_rts_wq08:15:133
18840992870,286cyclictest9183-21kworker/u16:2+efi_rts_wq08:07:293
18840992860,285cyclictest9183-21kworker/u16:2+efi_rts_wq07:50:153
18840992860,285cyclictest9183-21kworker/u16:2+efi_rts_wq07:50:143
18838992850,283cyclictest498-21kworker/u16:2+efi_rts_wq11:40:132
18835992850,284cyclictest12220-21kworker/u16:3+efi_rts_wq12:15:130
18837992840,283cyclictest19921-21kworker/u16:1+efi_rts_wq08:10:131
18835992810,280cyclictest26400-21kworker/u16:0+efi_rts_wq11:25:150
18835992810,280cyclictest1015-21kworker/u16:3+efi_rts_wq09:17:400
18837992800,279cyclictest19921-21kworker/u16:1+efi_rts_wq07:42:241
18835992800,278cyclictest12220-21kworker/u16:3+efi_rts_wq12:00:150
18840992780,277cyclictest9183-21kworker/u16:2+efi_rts_wq09:10:123
18840992770,276cyclictest9183-21kworker/u16:2+efi_rts_wq07:17:193
18838992760,275cyclictest9183-21kworker/u16:2+efi_rts_wq11:00:132
18837992760,275cyclictest9183-21kworker/u16:2+efi_rts_wq07:15:011
18837992760,275cyclictest26400-21kworker/u16:0+efi_rts_wq11:25:141
18837992760,275cyclictest1015-21kworker/u16:3+efi_rts_wq09:07:381
18837992750,274cyclictest498-21kworker/u16:2+efi_rts_wq11:40:121
18835992750,274cyclictest9183-21kworker/u16:2+efi_rts_wq09:35:130
18840992730,272cyclictest9183-21kworker/u16:2+efi_rts_wq07:45:143
18838992730,272cyclictest9183-21kworker/u16:2+efi_rts_wq10:40:162
18835992730,272cyclictest9846-21kworker/u16:1+efi_rts_wq12:28:170
18835992730,272cyclictest19921-21kworker/u16:1+efi_rts_wq08:30:130
18835992720,271cyclictest1015-21kworker/u16:3+efi_rts_wq10:27:540
18837992710,269cyclictest1015-21kworker/u16:3+efi_rts_wq10:45:131
18835992710,270cyclictest1015-21kworker/u16:3+efi_rts_wq09:05:130
18840992700,269cyclictest9183-21kworker/u16:2+efi_rts_wq10:20:133
18835992690,268cyclictest9183-21kworker/u16:2+efi_rts_wq08:35:130
18835992690,268cyclictest1015-21kworker/u16:3+efi_rts_wq10:05:120
18840992680,267cyclictest9183-21kworker/u16:2+efi_rts_wq07:55:143
18835992680,267cyclictest9183-21kworker/u16:2+efi_rts_wq10:35:140
18835992670,266cyclictest12220-21kworker/u16:3+efi_rts_wq12:38:180
18837992660,265cyclictest9183-21kworker/u16:2+efi_rts_wq08:25:121
18835992660,265cyclictest9183-21kworker/u16:2+efi_rts_wq09:22:420
18835992660,265cyclictest9183-21kworker/u16:2+efi_rts_wq08:42:360
18835992660,265cyclictest1015-21kworker/u16:3+efi_rts_wq09:40:130
18840992650,264cyclictest9846-21kworker/u16:1+efi_rts_wq12:20:133
18838992630,262cyclictest12220-21kworker/u16:3+efi_rts_wq11:55:142
18838992610,260cyclictest1015-21kworker/u16:3+efi_rts_wq09:00:122
18838992610,259cyclictest1015-21kworker/u16:3+efi_rts_wq10:15:142
18835992610,259cyclictest9183-21kworker/u16:2+efi_rts_wq07:40:130
18835992600,259cyclictest9183-21kworker/u16:2+efi_rts_wq09:10:130
18837992580,257cyclictest9846-21kworker/u16:1+efi_rts_wq12:13:131
18835992570,256cyclictest1015-21kworker/u16:3+efi_rts_wq09:25:120
18840992550,254cyclictest9846-21kworker/u16:1+efi_rts_wq11:45:123
18837992550,254cyclictest12220-21kworker/u16:3+efi_rts_wq12:05:121
18840992540,253cyclictest1015-21kworker/u16:3+efi_rts_wq10:47:573
18835992540,253cyclictest1015-21kworker/u16:3+efi_rts_wq10:00:140
18838992530,252cyclictest1015-21kworker/u16:3+efi_rts_wq09:52:482
18840992520,251cyclictest9183-21kworker/u16:2+efi_rts_wq08:25:133
18838992520,251cyclictest12220-21kworker/u16:3+efi_rts_wq12:30:122
18837992520,251cyclictest1015-21kworker/u16:3+efi_rts_wq10:17:521
18840992470,246cyclictest12220-21kworker/u16:3+efi_rts_wq12:18:143
18835992470,246cyclictest9183-21kworker/u16:2+efi_rts_wq09:47:460
18838992450,244cyclictest9183-21kworker/u16:2+efi_rts_wq10:52:592
18840992440,243cyclictest9183-21kworker/u16:2+efi_rts_wq08:37:343
18838992440,243cyclictest9183-21kworker/u16:2+efi_rts_wq09:45:122
18840992400,239cyclictest12220-21kworker/u16:3+efi_rts_wq12:25:133
18837992400,239cyclictest9183-21kworker/u16:2+efi_rts_wq10:55:141
18835992400,239cyclictest12220-21kworker/u16:3+efi_rts_wq11:55:150
18838992390,238cyclictest19921-21kworker/u16:1+efi_rts_wq07:20:132
18835992390,238cyclictest9846-21kworker/u16:1+efi_rts_wq12:20:120
18840992360,235cyclictest9183-21kworker/u16:2+efi_rts_wq09:30:143
18838992360,235cyclictest12220-21kworker/u16:3+efi_rts_wq12:25:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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