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2026-04-26 - 20:41

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 Sun Apr 26, 2026 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20856352263216,18sleep70-21swapper/719:09:457
20854992263220,33sleep00-21swapper/019:07:530
20853882263213,17sleep40-21swapper/419:06:354
20853442261252,6sleep20-21swapper/219:06:092
20855652258217,32sleep60-21swapper/619:08:486
20853062254212,33sleep50-21swapper/519:05:495
20856312248224,16sleep30-21swapper/319:09:403
20855782244218,17sleep10-21swapper/119:08:581
2085937993433,1cyclictest1700307-21kworker/0:2+events23:20:190
2085954993231,1cyclictest0-21swapper/300:30:553
208595499300,3cyclictest2743-21gnome-shell22:00:583
208595499300,3cyclictest2743-21gnome-shell22:00:583
208597299270,25cyclictest0-21swapper/721:32:337
208595999270,25cyclictest0-21swapper/400:07:154
2085972992622,3cyclictest1391-21snmpd23:30:267
208597299260,22cyclictest0-21swapper/720:11:477
2085963992622,3cyclictest2261033-21cat00:25:145
2085959992619,5cyclictest523-21systemd-journal22:58:154
2085959992617,5cyclictest0-21swapper/420:14:394
208595999260,24cyclictest523-21systemd-journal21:21:314
2085954992622,3cyclictest1391-21snmpd20:55:193
208595499260,22cyclictest0-21swapper/323:50:543
208595499260,22cyclictest0-21swapper/321:30:563
208595499260,22cyclictest0-21swapper/321:15:173
208595499260,22cyclictest0-21swapper/320:42:583
208595499260,22cyclictest0-21swapper/300:12:163
2085950992622,3cyclictest1391-21snmpd22:43:072
2085937992622,3cyclictest1391-21snmpd20:23:000
2085972992521,3cyclictest1391-21snmpd19:45:237
208597299251,23cyclictest2058165-21kworker/7:2+events00:10:167
208597299250,24cyclictest0-21swapper/721:01:597
208597299250,1cyclictest0-21swapper/720:27:137
2085968992521,3cyclictest1391-21snmpd00:13:306
2085963992521,3cyclictest1391-21snmpd22:14:065
2085963992521,3cyclictest1391-21snmpd19:13:535
2085954992521,3cyclictest1391-21snmpd22:26:343
2085954992521,3cyclictest1391-21snmpd20:06:113
2085954992521,3cyclictest1391-21snmpd20:03:383
2085944992521,3cyclictest1391-21snmpd23:32:351
2085944992521,3cyclictest1391-21snmpd20:30:001
208594499250,24cyclictest0-21swapper/120:35:181
2085937992521,3cyclictest1700307-21kworker/0:2+events22:50:250
2085937992518,5cyclictest0-21swapper/020:56:380
2085937992518,5cyclictest0-21swapper/020:48:390
2085937992518,3cyclictest0-21swapper/023:48:360
2085937992518,3cyclictest0-21swapper/019:24:550
208593799250,23cyclictest0-21swapper/019:40:100
208593799250,15cyclictest0-21swapper/022:36:580
208593799250,15cyclictest0-21swapper/000:30:590
2085972992422,1cyclictest1391-21snmpd19:16:077
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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