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2026-04-06 - 18:33

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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 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 rack0slot3s.osadl.org (updated Mon Apr 06, 2026 00:44:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31513212260210,17sleep20-21swapper/219:08:212
31512252260212,17sleep30-21swapper/319:07:023
31513862258215,33sleep70-21swapper/719:09:157
31512222257209,17sleep00-21swapper/019:06:590
31513802256211,36sleep10-21swapper/119:09:091
31513062256247,6sleep50-21swapper/519:08:085
31512872254228,17sleep40-21swapper/419:07:514
31512892244218,17sleep60-21swapper/619:07:536
3151744993718,17cyclictest2283934-21kworker/4:2+mm_percpu_wq21:00:274
315175299350,34cyclictest0-21swapper/620:30:166
3151744993530,3cyclictest0-21swapper/423:45:264
315174499300,28cyclictest2283934-21kworker/4:2+mm_percpu_wq23:05:154
3151744992922,5cyclictest3159556-21ntpq19:20:194
3151728992928,1cyclictest0-21swapper/119:40:141
315175299280,26cyclictest0-21swapper/623:10:146
3151744992824,2cyclictest0-21swapper/422:41:534
3151744992824,2cyclictest0-21swapper/419:28:294
3151744992822,4cyclictest581ktimers/420:20:214
3151744992822,4cyclictest581ktimers/420:20:214
315174499280,24cyclictest0-21swapper/422:25:154
315175799270,26cyclictest2743-21gnome-shell20:02:597
3151744992725,2cyclictest0-21swapper/421:15:234
3151744992723,2cyclictest0-21swapper/423:52:284
3151744992723,2cyclictest0-21swapper/423:20:124
3151744992723,2cyclictest0-21swapper/422:58:214
3151744992723,2cyclictest0-21swapper/422:18:464
3151744992723,2cyclictest0-21swapper/420:33:014
3151744992723,2cyclictest0-21swapper/420:18:574
3151744992722,3cyclictest59-21ksoftirqd/421:10:054
3151744992722,3cyclictest2283934-21kworker/4:2-events20:55:134
3151744992721,4cyclictest3177399-21/usr/sbin/munin19:55:114
3151744992721,4cyclictest3166434-21/usr/sbin/munin19:35:174
315174499271,25cyclictest0-21swapper/423:10:134
315174499270,25cyclictest2283934-21kworker/4:2+mm_percpu_wq22:35:134
315174499270,22cyclictest2283934-21kworker/4:2+mm_percpu_wq20:35:214
3151757992625,1cyclictest0-21swapper/719:40:147
315174499267,17cyclictest0-21swapper/421:35:134
3151744992623,1cyclictest0-21swapper/422:13:254
3151744992622,4cyclictest571rcuc/422:24:294
3151744992622,3cyclictest3331454-21cstates00:35:134
3151744992622,3cyclictest1391-21snmpd21:26:174
3151744992622,3cyclictest1391-21snmpd19:54:204
3151744992622,3cyclictest1391-21snmpd00:20:074
3151744992622,2cyclictest2283934-21kworker/4:2-events23:25:174
3151744992622,2cyclictest0-21swapper/423:18:344
3151744992622,2cyclictest0-21swapper/423:04:294
3151744992622,2cyclictest0-21swapper/422:04:594
3151744992622,2cyclictest0-21swapper/421:50:134
3151744992622,2cyclictest0-21swapper/420:40:034
3151744992622,2cyclictest0-21swapper/419:15:134
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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