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2025-11-22 - 23:58

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 here to display the system's profile data or here to proceed to next system.
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 rack0slot4s.osadl.org (updated Sat Nov 22, 2025 00:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
83013626138,1sleep50-21swapper/519:07:2111
830819995618,25cyclictest477804-21WRRende~ckend#100:28:1411
83031625652,3sleep100-21swapper/1019:09:352
424698560,55rtkit-daemon0-21swapper/1319:08:375
830842994834,12cyclictest477802-21WRScene~ilder#119:29:544
830842994632,12cyclictest477802-21WRScene~ilder#120:21:254
830842994544,1cyclictest994586-21kworker/u32:5+flush-259:022:34:554
830842994542,3cyclictest850968-21kworker/u32:0+events_unbound20:14:254
830830994519,26cyclictest0-21swapper/922:38:2415
830842994431,12cyclictest477704-21thunderbird19:34:134
830842994431,11cyclictest1580591-21chrome23:31:134
83081999449,25cyclictest477804-21WRRende~ckend#123:55:1711
83081999449,25cyclictest477704-21thunderbird20:04:4011
83013324441,1sleep20-21swapper/219:07:198
830842994342,1cyclictest944316-21kworker/u32:2+events_unbound21:31:124
830842994331,10cyclictest477802-21WRScene~ilder#100:17:484
830842994241,1cyclictest935986-21kworker/u32:3+events_unbound21:15:334
830842994241,1cyclictest477802-21WRScene~ilder#120:59:464
830842994233,9cyclictest477704-21thunderbird19:46:524
830842994131,1cyclictest477802-21WRScene~ilder#121:46:214
830842994129,1cyclictest477802-21WRScene~ilder#100:25:464
830842994129,12cyclictest477802-21WRScene~ilder#120:00:594
83084299408,30cyclictest477704-21thunderbird00:00:384
830842994029,9cyclictest477804-21WRRende~ckend#121:13:474
830842994029,9cyclictest477802-21WRScene~ilder#100:32:284
830842994029,11cyclictest477802-21WRScene~ilder#122:00:524
830826994038,2cyclictest824642-21kworker/u32:1+flush-259:019:30:2014
83024624038,1sleep120-21swapper/1219:08:494
83084299398,29cyclictest477704-21thunderbird00:06:084
830814993938,1cyclictest955993-21kworker/u32:1+events_unbound22:00:1910
83009823937,1sleep110-21swapper/1119:06:553
83084299383,0cyclictest211rcu_preempt21:00:194
82687723836,1sleep140-21swapper/1419:05:076
83084299377,30cyclictest477704-21thunderbird23:01:114
83084299377,30cyclictest477704-21thunderbird21:20:204
83084299377,1cyclictest477704-21thunderbird20:26:504
830842993737,0cyclictest0-21swapper/1221:50:204
830826993735,2cyclictest1056247-21kworker/u32:1+flush-259:023:42:1314
830826993735,2cyclictest1056247-21kworker/u32:1+flush-259:023:42:1214
83084299366,30cyclictest477704-21thunderbird20:53:434
83084299366,30cyclictest477704-21thunderbird20:53:424
830842993635,1cyclictest477704-21thunderbird21:37:074
830842993633,3cyclictest0-21swapper/1220:08:024
830842993632,4cyclictest922187-21kworker/u32:0+events_unbound21:09:524
83016723634,1sleep150-21swapper/1519:07:487
830842993530,3cyclictest477307-21Softwar~cThread22:06:204
83025523533,1sleep10-21swapper/119:08:541
83016123532,2sleep90-21swapper/919:07:4115
83014023531,2sleep80-21swapper/819:07:2414
83084299345,1cyclictest477704-21thunderbird21:57:084
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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