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2025-08-21 - 21:31

OSADL QA Farm on Real-time of Mainline Linux

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

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.

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 r0s0s.osadl.org (updated Thu Aug 21, 2025 12:46:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
33800012303294,6sleep40-21swapper/407:09:254
33799882294278,10sleep60-21swapper/607:09:196
33800492293274,12sleep70-21swapper/707:10:007
33797462289256,25sleep20-21swapper/207:06:332
33797452289256,25sleep10-21swapper/107:06:321
33799872288269,12sleep50-21swapper/507:09:185
33799392286267,12sleep30-21swapper/307:08:433
33780212285265,13sleep00-21swapper/007:05:030
3380523994138,2cyclictest3395265-21kworker/u16:2+events_unbound08:45:012
3380521993630,5cyclictest3146991-21cups-browsed09:35:250
3380526993530,5cyclictest833-21snmpd08:04:085
3380523993533,2cyclictest3482759-21kworker/u16:0+flush-8:011:25:012
3380521993530,4cyclictest833-21snmpd11:00:550
3380527993432,2cyclictest3407157-21kworker/u16:1+events_unbound08:04:566
3380526993429,5cyclictest833-21snmpd08:46:545
3380521993428,5cyclictest833-21snmpd12:05:330
338052199340,34cyclictest0-21swapper/009:40:290
3380528993330,2cyclictest833-21snmpd12:04:577
3380528993330,2cyclictest833-21snmpd11:23:147
338052899330,30cyclictest0-21swapper/710:18:487
3380526993330,3cyclictest833-21snmpd08:05:145
3380525993330,2cyclictest833-21snmpd09:10:284
338052599330,31cyclictest0-21swapper/409:05:014
338052599330,30cyclictest0-21swapper/411:49:114
338052599330,30cyclictest0-21swapper/409:51:054
3380522993330,2cyclictest833-21snmpd11:34:171
3380522993330,2cyclictest833-21snmpd08:03:171
3380522993330,2cyclictest833-21snmpd07:50:471
3380522993329,3cyclictest833-21snmpd12:12:241
3380521993330,2cyclictest833-21snmpd11:06:430
3380521993330,2cyclictest833-21snmpd09:07:280
3380521993330,2cyclictest833-21snmpd08:52:000
3380521993327,6cyclictest833-21snmpd10:13:540
338052199330,30cyclictest0-21swapper/012:24:400
338052199330,30cyclictest0-21swapper/010:31:540
338052899320,31cyclictest0-21swapper/711:46:357
338052899320,31cyclictest0-21swapper/709:59:087
338052899320,31cyclictest0-21swapper/709:50:057
338052899320,30cyclictest0-21swapper/712:34:557
338052899320,30cyclictest0-21swapper/710:36:337
338052899320,30cyclictest0-21swapper/707:38:197
3380527993231,1cyclictest3431562-21kworker/u16:2+events_unbound09:45:006
3380527993230,2cyclictest833-21snmpd10:31:156
3380527993230,2cyclictest833-21snmpd09:00:496
3380526993230,2cyclictest833-21snmpd11:40:145
3380526993229,2cyclictest833-21snmpd07:27:435
3380526993229,2cyclictest3415715-21cat08:20:155
3380525993230,2cyclictest833-21snmpd10:18:214
3380525993230,1cyclictest833-21snmpd12:26:224
3380525993230,1cyclictest833-21snmpd12:24:524
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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