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2026-05-05 - 03:42

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 Tue May 05, 2026 00:43:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
254752318310,5sleep30-21swapper/319:07:423
254792316303,4sleep20-21swapper/219:07:462
254232315307,5sleep00-21swapper/019:07:030
253782314308,4sleep10-21swapper/119:06:291
25940993040,301cyclictest9223-21kworker/u16:1+efi_rts_wq22:05:121
25940993040,301cyclictest9223-21kworker/u16:1+efi_rts_wq22:05:121
25938993010,300cyclictest9223-21kworker/u16:1+efi_rts_wq20:30:200
25945993000,299cyclictest2134-21kworker/u16:4+efi_rts_wq19:30:122
25938992990,298cyclictest2134-21kworker/u16:4+efi_rts_wq19:50:140
25938992990,298cyclictest19063-21kworker/u16:3+efi_rts_wq23:56:020
25938992990,298cyclictest11064-21kworker/u16:2+efi_rts_wq23:51:000
25940992980,297cyclictest9223-21kworker/u16:1+efi_rts_wq21:10:281
25938992980,297cyclictest14857-21kworker/u16:0+efi_rts_wq21:40:120
25947992960,294cyclictest17947-21kworker/u16:1+efi_rts_wq22:40:103
25938992960,295cyclictest14857-21kworker/u16:0+efi_rts_wq20:35:120
25947992940,293cyclictest2134-21kworker/u16:4+efi_rts_wq19:40:103
25945992940,293cyclictest15411-21kworker/u16:2+efi_rts_wq19:20:062
25940992930,292cyclictest2134-21kworker/u16:4+efi_rts_wq19:50:131
25940992930,292cyclictest11064-21kworker/u16:2+efi_rts_wq00:35:121
25940992920,291cyclictest9223-21kworker/u16:1+efi_rts_wq20:30:121
25938992920,291cyclictest14857-21kworker/u16:0+efi_rts_wq20:40:120
25945992910,290cyclictest17947-21kworker/u16:1+efi_rts_wq22:50:142
25947992900,289cyclictest19063-21kworker/u16:3+efi_rts_wq00:10:123
25947992880,287cyclictest14857-21kworker/u16:0+efi_rts_wq22:15:123
25938992880,287cyclictest14857-21kworker/u16:0+efi_rts_wq22:20:440
25945992870,286cyclictest2771-21kworker/u16:3+efi_rts_wq22:35:102
25938992870,286cyclictest17947-21kworker/u16:1+efi_rts_wq22:50:500
25947992860,285cyclictest1045-21kworker/u16:3+efi_rts_wq19:35:103
25947992850,284cyclictest9762-21kworker/u16:0+efi_rts_wq23:35:123
25945992850,284cyclictest11064-21kworker/u16:2+efi_rts_wq00:35:132
25938992840,283cyclictest9223-21kworker/u16:1+efi_rts_wq20:50:240
25938992820,281cyclictest9223-21kworker/u16:1+efi_rts_wq20:45:120
25938992820,280cyclictest11064-21kworker/u16:2+efi_rts_wq22:45:120
25940992800,279cyclictest9223-21kworker/u16:1+efi_rts_wq21:30:121
25938992800,279cyclictest14857-21kworker/u16:0+efi_rts_wq21:05:160
25938992800,277cyclictest9223-21kworker/u16:1+efi_rts_wq21:20:120
25945992790,278cyclictest15411-21kworker/u16:2+efi_rts_wq19:15:142
25938992780,275cyclictest17947-21kworker/u16:1+efi_rts_wq23:10:120
25945992770,276cyclictest9223-21kworker/u16:1+efi_rts_wq21:35:122
25945992770,276cyclictest14857-21kworker/u16:0+efi_rts_wq22:30:112
25947992760,275cyclictest28074-21kworker/u16:3+efi_rts_wq23:30:133
25945992760,273cyclictest28074-21kworker/u16:3+efi_rts_wq23:30:142
25938992760,274cyclictest11064-21kworker/u16:2+efi_rts_wq22:55:490
25947992750,274cyclictest9223-21kworker/u16:1+efi_rts_wq21:55:123
25945992750,274cyclictest14857-21kworker/u16:0+efi_rts_wq21:25:322
25945992750,274cyclictest11064-21kworker/u16:2+efi_rts_wq23:00:142
25938992750,274cyclictest11064-21kworker/u16:2+efi_rts_wq23:40:580
25938992740,273cyclictest14857-21kworker/u16:0+efi_rts_wq20:00:140
25940992730,272cyclictest14857-21kworker/u16:0+efi_rts_wq20:10:131
25940992730,272cyclictest11064-21kworker/u16:2+efi_rts_wq23:50:121
25947992710,270cyclictest2771-21kworker/u16:3+efi_rts_wq22:10:133
25947992710,270cyclictest2771-21kworker/u16:3+efi_rts_wq22:10:123
25945992710,270cyclictest11064-21kworker/u16:2+efi_rts_wq22:55:132
25940992710,270cyclictest9223-21kworker/u16:1+efi_rts_wq20:45:121
25938992710,270cyclictest19063-21kworker/u16:3+efi_rts_wq00:15:140
25940992700,269cyclictest11064-21kworker/u16:2+efi_rts_wq23:55:111
25938992690,267cyclictest9223-21kworker/u16:1+efi_rts_wq20:25:190
25945992680,267cyclictest15411-21kworker/u16:2+efi_rts_wq19:10:132
25938992680,267cyclictest9762-21kworker/u16:0+efi_rts_wq23:35:570
25938992680,267cyclictest9223-21kworker/u16:1+efi_rts_wq21:30:320
25947992660,265cyclictest14857-21kworker/u16:0+efi_rts_wq22:00:133
25945992660,263cyclictest2134-21kworker/u16:4+efi_rts_wq19:35:132
25940992660,265cyclictest2771-21kworker/u16:3+efi_rts_wq22:10:411
25940992660,265cyclictest2771-21kworker/u16:3+efi_rts_wq22:10:411
25938992660,265cyclictest19063-21kworker/u16:3+efi_rts_wq00:00:130
25947992650,264cyclictest14857-21kworker/u16:0+efi_rts_wq20:20:123
25945992650,264cyclictest14857-21kworker/u16:0+efi_rts_wq20:40:232
25945992650,262cyclictest15411-21kworker/u16:2+efi_rts_wq19:25:132
25940992650,264cyclictest14857-21kworker/u16:0+efi_rts_wq20:35:121
25945992640,263cyclictest14857-21kworker/u16:0+efi_rts_wq20:00:132
25940992640,263cyclictest9223-21kworker/u16:1+efi_rts_wq20:05:151
25940992640,263cyclictest19063-21kworker/u16:3+efi_rts_wq00:01:021
25940992640,262cyclictest11064-21kworker/u16:2+efi_rts_wq22:45:121
25945992620,261cyclictest11064-21kworker/u16:2+efi_rts_wq23:25:142
25938992620,261cyclictest14857-21kworker/u16:0+efi_rts_wq20:55:260
25947992610,260cyclictest9223-21kworker/u16:1+efi_rts_wq20:25:123
25947992610,259cyclictest11064-21kworker/u16:2+efi_rts_wq23:15:123
25947992600,259cyclictest14857-21kworker/u16:0+efi_rts_wq22:30:113
25938992600,259cyclictest9223-21kworker/u16:1+efi_rts_wq21:00:260
25947992580,257cyclictest11064-21kworker/u16:2+efi_rts_wq23:25:143
25945992580,257cyclictest9223-21kworker/u16:1+efi_rts_wq21:10:122
25947992570,256cyclictest28886-21kworker/u16:0+efi_rts_wq19:20:133
25945992550,254cyclictest9223-21kworker/u16:1+efi_rts_wq21:30:122
25945992550,254cyclictest14857-21kworker/u16:0+efi_rts_wq21:40:352
25947992530,252cyclictest28074-21kworker/u16:3+efi_rts_wq23:05:153
25945992530,252cyclictest11064-21kworker/u16:2+efi_rts_wq00:05:172
25940992520,251cyclictest19063-21kworker/u16:3+efi_rts_wq00:30:121
25947992500,249cyclictest9223-21kworker/u16:1+efi_rts_wq20:15:133
25940992490,248cyclictest2771-21kworker/u16:3+efi_rts_wq22:25:441
25938992480,247cyclictest11064-21kworker/u16:2+efi_rts_wq00:20:090
25945992470,246cyclictest11064-21kworker/u16:2+efi_rts_wq23:15:122
25940992440,243cyclictest17947-21kworker/u16:1+efi_rts_wq22:40:111
25940992410,240cyclictest14375-21kworker/u16:1+efi_rts_wq23:45:121
25945992390,238cyclictest14857-21kworker/u16:0+efi_rts_wq21:50:122
25945992390,238cyclictest14857-21kworker/u16:0+efi_rts_wq20:20:192
25938992390,238cyclictest2771-21kworker/u16:3+efi_rts_wq22:35:110
25940992360,235cyclictest1045-21kworker/u16:3+efi_rts_wq19:45:121
25938992340,233cyclictest9223-21kworker/u16:1+efi_rts_wq21:15:130
25945992320,231cyclictest9223-21kworker/u16:1+efi_rts_wq20:50:142
25940992310,230cyclictest28074-21kworker/u16:3+efi_rts_wq23:15:541
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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