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2026-05-17 - 10:45

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 Sun May 17, 2026 00:43:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13092331304,25sleep20-21swapper/219:08:202
11192317304,4sleep10-21swapper/119:05:551
14392316303,4sleep00-21swapper/019:09:570
12162314307,5sleep30-21swapper/319:07:093
1780993000,299cyclictest24251-21kworker/u16:3+efi_rts_wq23:15:152
1774992990,298cyclictest24251-21kworker/u16:3+efi_rts_wq22:20:131
1774992990,298cyclictest24251-21kworker/u16:3+efi_rts_wq22:20:121
1767992990,298cyclictest24251-21kworker/u16:3+efi_rts_wq21:35:120
1780992960,295cyclictest17553-21kworker/u16:2+efi_rts_wq20:15:122
1774992960,295cyclictest24251-21kworker/u16:3+efi_rts_wq00:30:141
1767992960,295cyclictest17553-21kworker/u16:2+efi_rts_wq22:15:120
1767992960,295cyclictest17553-21kworker/u16:2+efi_rts_wq20:05:130
1774992950,294cyclictest24251-21kworker/u16:3+efi_rts_wq23:25:121
1774992950,294cyclictest24251-21kworker/u16:3+efi_rts_wq23:10:371
1786992940,293cyclictest24251-21kworker/u16:3+efi_rts_wq22:20:133
1786992940,293cyclictest24251-21kworker/u16:3+efi_rts_wq22:20:123
1780992940,292cyclictest30757-21kworker/u16:1+efi_rts_wq22:50:132
1774992940,293cyclictest24251-21kworker/u16:3+efi_rts_wq20:20:041
1774992940,293cyclictest17553-21kworker/u16:2+efi_rts_wq19:40:121
1774992930,292cyclictest24251-21kworker/u16:3+efi_rts_wq19:29:541
1767992930,292cyclictest24251-21kworker/u16:3+efi_rts_wq19:25:130
1767992930,292cyclictest17553-21kworker/u16:2+efi_rts_wq22:45:110
1767992920,291cyclictest24251-21kworker/u16:3+efi_rts_wq22:25:150
1767992920,291cyclictest17553-21kworker/u16:2+efi_rts_wq21:45:120
1767992920,290cyclictest17553-21kworker/u16:2+efi_rts_wq20:50:120
1774992910,290cyclictest17553-21kworker/u16:2+efi_rts_wq22:35:131
1767992910,290cyclictest15996-21kworker/u16:1+efi_rts_wq00:20:500
1774992900,289cyclictest15996-21kworker/u16:1+efi_rts_wq00:20:121
1780992890,288cyclictest15996-21kworker/u16:1+efi_rts_wq00:30:522
1767992890,288cyclictest15996-21kworker/u16:1+efi_rts_wq00:15:130
1774992870,286cyclictest17553-21kworker/u16:2+efi_rts_wq21:20:131
1786992860,285cyclictest24251-21kworker/u16:3+efi_rts_wq21:50:103
1767992850,284cyclictest15996-21kworker/u16:1+efi_rts_wq23:55:450
1774992830,281cyclictest24251-21kworker/u16:3+efi_rts_wq23:05:111
1786992820,280cyclictest24251-21kworker/u16:3+efi_rts_wq23:25:133
1774992820,281cyclictest24251-21kworker/u16:3+efi_rts_wq22:30:111
1786992810,280cyclictest24251-21kworker/u16:3+efi_rts_wq22:35:313
1780992810,280cyclictest24251-21kworker/u16:3+efi_rts_wq22:40:312
1786992800,277cyclictest24251-21kworker/u16:3+efi_rts_wq00:35:123
1780992800,279cyclictest17553-21kworker/u16:2+efi_rts_wq20:00:122
1774992800,278cyclictest24251-21kworker/u16:3+efi_rts_wq19:10:131
1767992780,277cyclictest24251-21kworker/u16:3+efi_rts_wq19:54:580
1774992770,276cyclictest24251-21kworker/u16:3+efi_rts_wq19:20:121
1774992760,275cyclictest17553-21kworker/u16:2+efi_rts_wq20:05:131
1780992750,274cyclictest15996-21kworker/u16:1+efi_rts_wq23:50:122
1774992750,274cyclictest24251-21kworker/u16:3+efi_rts_wq22:10:131
1767992740,273cyclictest15996-21kworker/u16:1+efi_rts_wq00:05:120
1780992730,272cyclictest17553-21kworker/u16:2+efi_rts_wq21:25:132
1786992720,271cyclictest17553-21kworker/u16:2+efi_rts_wq21:25:133
1767992720,271cyclictest17553-21kworker/u16:2+efi_rts_wq20:05:010
1774992710,270cyclictest17553-21kworker/u16:2+efi_rts_wq20:10:101
1767992710,270cyclictest24251-21kworker/u16:3+efi_rts_wq19:15:000
1786992700,269cyclictest24251-21kworker/u16:3+efi_rts_wq23:10:123
1786992700,269cyclictest17553-21kworker/u16:2+efi_rts_wq20:30:133
1780992700,269cyclictest24251-21kworker/u16:3+efi_rts_wq22:55:142
1774992700,269cyclictest24251-21kworker/u16:3+efi_rts_wq00:10:131
1780992690,268cyclictest24251-21kworker/u16:3+efi_rts_wq21:30:132
1780992690,268cyclictest17553-21kworker/u16:2+efi_rts_wq19:55:132
1774992690,268cyclictest24251-21kworker/u16:3+efi_rts_wq21:40:131
1786992670,266cyclictest24251-21kworker/u16:3+efi_rts_wq23:00:353
1774992670,266cyclictest24251-21kworker/u16:3+efi_rts_wq23:35:121
1786992630,262cyclictest17553-21kworker/u16:2+efi_rts_wq23:05:123
1774992620,261cyclictest17553-21kworker/u16:2+efi_rts_wq22:50:331
1774992610,260cyclictest17553-21kworker/u16:2+efi_rts_wq20:55:131
1786992600,259cyclictest17553-21kworker/u16:2+efi_rts_wq20:35:123
1767992600,259cyclictest17553-21kworker/u16:2+efi_rts_wq23:00:140
1786992580,257cyclictest24251-21kworker/u16:3+efi_rts_wq21:30:163
1780992570,256cyclictest17553-21kworker/u16:2+efi_rts_wq22:00:232
1774992570,256cyclictest24251-21kworker/u16:3+efi_rts_wq21:00:121
1767992570,256cyclictest24251-21kworker/u16:3+efi_rts_wq22:05:120
1774992560,255cyclictest24251-21kworker/u16:3+efi_rts_wq20:30:141
1767992560,255cyclictest24251-21kworker/u16:3+efi_rts_wq23:15:370
1780992550,254cyclictest15996-21kworker/u16:1+efi_rts_wq00:00:102
1786992540,253cyclictest17553-21kworker/u16:2+efi_rts_wq21:05:143
1786992530,251cyclictest17553-21kworker/u16:2+efi_rts_wq23:20:383
1767992530,252cyclictest24251-21kworker/u16:3+efi_rts_wq00:25:150
1786992520,250cyclictest17553-21kworker/u16:2+efi_rts_wq22:30:293
1767992520,251cyclictest15996-21kworker/u16:1+efi_rts_wq23:30:140
1786992510,248cyclictest17553-21kworker/u16:2+efi_rts_wq19:15:143
1767992510,250cyclictest24251-21kworker/u16:3+efi_rts_wq21:40:140
1767992490,248cyclictest17553-21kworker/u16:2+efi_rts_wq20:40:130
1774992470,246cyclictest24251-21kworker/u16:3+efi_rts_wq21:35:121
1774992470,246cyclictest24251-21kworker/u16:3+efi_rts_wq20:25:121
1767992460,245cyclictest24251-21kworker/u16:3+efi_rts_wq21:50:110
1786992450,244cyclictest17553-21kworker/u16:2+efi_rts_wq21:10:133
1786992440,243cyclictest17553-21kworker/u16:2+efi_rts_wq22:05:233
1786992440,243cyclictest17553-21kworker/u16:2+efi_rts_wq21:15:143
1786992440,243cyclictest17553-21kworker/u16:2+efi_rts_wq19:59:593
1774992420,241cyclictest15996-21kworker/u16:1+efi_rts_wq00:25:501
1780992400,239cyclictest24251-21kworker/u16:3+efi_rts_wq20:35:062
1774992380,237cyclictest24251-21kworker/u16:3+efi_rts_wq21:30:131
1767992380,237cyclictest17553-21kworker/u16:2+efi_rts_wq21:05:130
1786992360,235cyclictest17553-21kworker/u16:2+efi_rts_wq20:45:093
1786992360,235cyclictest17553-21kworker/u16:2+efi_rts_wq20:10:103
1774992360,235cyclictest17553-21kworker/u16:2+efi_rts_wq22:25:281
1780992340,233cyclictest17553-21kworker/u16:2+efi_rts_wq22:45:122
1774992340,233cyclictest24251-21kworker/u16:3+efi_rts_wq22:55:141
1767992340,233cyclictest15996-21kworker/u16:1+efi_rts_wq23:35:410
1767992320,231cyclictest24251-21kworker/u16:3+efi_rts_wq00:10:120
1767992320,230cyclictest30757-21kworker/u16:1+efi_rts_wq22:50:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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