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2026-03-08 - 01:56

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 Fri Mar 06, 2026 12:43:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
160972334309,23sleep00-21swapper/007:08:570
158832318311,4sleep30-21swapper/307:06:143
158762317310,5sleep10-21swapper/107:06:091
16556993140,313cyclictest9052-21kworker/u16:3+efi_rts_wq09:25:133
16548993140,313cyclictest10415-21kworker/u16:2+efi_rts_wq11:53:000
159392314306,5sleep20-21swapper/207:06:572
16556993130,312cyclictest24869-21kworker/u16:4+efi_rts_wq10:27:423
16552993130,312cyclictest9052-21kworker/u16:3+efi_rts_wq08:45:141
16552993120,311cyclictest13506-21kworker/u16:1+efi_rts_wq11:40:111
16548993110,310cyclictest13506-21kworker/u16:1+efi_rts_wq07:25:120
16554993100,309cyclictest13506-21kworker/u16:1+efi_rts_wq10:42:452
16552993101,308cyclictest29404-21kworker/u16:3+efi_rts_wq11:12:521
16552993090,308cyclictest26589-21kworker/u16:2+efi_rts_wq10:55:131
16548993070,306cyclictest13506-21kworker/u16:1+efi_rts_wq09:17:280
16552993060,305cyclictest13506-21kworker/u16:1+efi_rts_wq08:40:121
16548993060,305cyclictest9052-21kworker/u16:3+efi_rts_wq07:30:130
16552993040,303cyclictest24869-21kworker/u16:4+efi_rts_wq10:40:111
16548993040,303cyclictest13506-21kworker/u16:1+efi_rts_wq09:45:120
16556993030,302cyclictest13506-21kworker/u16:1+efi_rts_wq07:15:123
16556993020,300cyclictest13506-21kworker/u16:1+efi_rts_wq12:35:123
16552993020,301cyclictest24869-21kworker/u16:4+efi_rts_wq10:25:131
16548993020,301cyclictest9052-21kworker/u16:3+efi_rts_wq09:35:110
16548993010,300cyclictest13506-21kworker/u16:1+efi_rts_wq12:20:130
16554992990,298cyclictest24869-21kworker/u16:4+efi_rts_wq10:35:142
16554992990,295cyclictest9052-21kworker/u16:3+efi_rts_wq09:25:132
16554992980,297cyclictest13506-21kworker/u16:1+efi_rts_wq10:20:132
16552992980,297cyclictest24869-21kworker/u16:4+efi_rts_wq09:55:111
16548992980,297cyclictest13506-21kworker/u16:1+efi_rts_wq10:30:130
16556992960,295cyclictest13506-21kworker/u16:1+efi_rts_wq09:20:123
16554992960,295cyclictest10415-21kworker/u16:2+efi_rts_wq11:42:572
16556992940,293cyclictest13506-21kworker/u16:1+efi_rts_wq09:10:133
16554992940,293cyclictest13506-21kworker/u16:1+efi_rts_wq07:15:132
16552992940,293cyclictest10415-21kworker/u16:2+efi_rts_wq12:25:131
16554992930,292cyclictest10415-21kworker/u16:2+efi_rts_wq12:13:042
16554992920,291cyclictest32175-21kworker/u16:2+efi_rts_wq11:10:122
16552992920,291cyclictest13506-21kworker/u16:1+efi_rts_wq11:45:121
16554992900,289cyclictest13506-21kworker/u16:1+efi_rts_wq09:20:122
16552992890,288cyclictest9052-21kworker/u16:3+efi_rts_wq09:05:131
16556992860,285cyclictest13506-21kworker/u16:1+efi_rts_wq10:02:393
16554992860,285cyclictest13506-21kworker/u16:1+efi_rts_wq07:45:142
16556992850,284cyclictest13506-21kworker/u16:1+efi_rts_wq10:05:123
16554992850,284cyclictest13506-21kworker/u16:1+efi_rts_wq11:00:132
16548992850,284cyclictest13506-21kworker/u16:1+efi_rts_wq08:10:130
16548992840,283cyclictest9052-21kworker/u16:3+efi_rts_wq08:50:110
16556992830,282cyclictest13506-21kworker/u16:1+efi_rts_wq10:22:423
16552992830,282cyclictest9052-21kworker/u16:3+efi_rts_wq07:40:111
16556992820,281cyclictest9052-21kworker/u16:3+efi_rts_wq08:20:123
16556992810,280cyclictest13506-21kworker/u16:1+efi_rts_wq11:00:133
16552992810,280cyclictest13506-21kworker/u16:1+efi_rts_wq12:30:131
16548992800,279cyclictest13506-21kworker/u16:1+efi_rts_wq07:35:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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