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2026-03-27 - 15:03

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 Fri Mar 27, 2026 00:46:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
34047922385379,4sleep10-21swapper/119:08:421
34013572372353,12sleep140-21swapper/1419:05:096
34045142369331,12sleep60-21swapper/619:05:4912
34048522364326,30sleep50-21swapper/519:09:3411
34045852363322,13sleep20-21swapper/219:06:358
34045232361320,13sleep110-21swapper/1119:05:553
34045882357319,12sleep40-21swapper/419:06:3710
34048042356337,13sleep130-21swapper/1319:08:535
34045412354334,13sleep80-21swapper/819:06:0814
34045042354334,13sleep150-21swapper/1519:05:437
34045592353334,12sleep30-21swapper/319:06:199
34046542352333,13sleep70-21swapper/719:07:1213
34045682350330,13sleep90-21swapper/919:06:2615
34045212350330,13sleep100-21swapper/1019:05:542
34046692342322,14sleep00-21swapper/019:07:200
34013552342323,13sleep120-21swapper/1219:05:084
3405376993635,1cyclictest3532547-21kworker/u32:2+events_unbound22:00:175
3405376993635,1cyclictest3532547-21kworker/u32:2+events_unbound22:00:175
3405366993634,2cyclictest3374241-21kworker/u32:3+events_unbound19:45:162
3405352993529,6cyclictest1774-21snmpd23:19:3913
3405382993433,1cyclictest3570227-21kworker/u32:5+flush-259:022:25:197
3405382993333,0cyclictest0-21swapper/1522:16:127
340537899338,25cyclictest0-21swapper/1421:52:576
340535799330,30cyclictest0-21swapper/823:55:1714
340534199330,30cyclictest0-21swapper/323:43:379
340534199330,30cyclictest0-21swapper/321:12:089
3405382993232,0cyclictest0-21swapper/1522:51:037
3405382993232,0cyclictest0-21swapper/1500:10:557
340537899328,11cyclictest0-21swapper/1423:31:486
340537899328,11cyclictest0-21swapper/1423:20:496
340537899328,11cyclictest0-21swapper/1421:30:596
340537899328,11cyclictest0-21swapper/1419:19:116
340537899320,29cyclictest0-21swapper/1400:35:156
3405366993228,1cyclictest3670027-21kworker/10:0+events23:40:152
340538299311,30cyclictest3630687-21kworker/15:1-events23:14:317
340537899317,11cyclictest0-21swapper/1420:47:036
340537899310,30cyclictest0-21swapper/1421:11:116
340537299310,30cyclictest0-21swapper/1219:14:594
3405366993130,1cyclictest3741326-21kworker/10:0+events00:30:572
3405366993130,1cyclictest3610763-21kworker/10:1+events22:51:032
3405366993130,1cyclictest3528366-21kworker/10:0+events21:31:182
3405366993130,1cyclictest3415197-21kworker/u32:4+events_unbound19:20:112
3405366993129,2cyclictest3751555-21kworker/10:2+events00:39:052
3405366993129,2cyclictest3670027-21kworker/10:0+events23:45:582
3405362993130,1cyclictest1774-21snmpd22:19:4615
340536299310,30cyclictest0-21swapper/921:30:1415
340536299310,30cyclictest0-21swapper/900:28:1715
3405357993129,1cyclictest1774-21snmpd21:42:0014
340535799310,30cyclictest0-21swapper/822:28:0914
340535799310,30cyclictest0-21swapper/822:24:5814
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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