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2026-06-11 - 07:50

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 rack7slot7s.osadl.org (updated Thu Jun 11, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2636929750,40sleep20-21swapper/219:06:362
2646429669,9sleep30-21swapper/319:07:503
2630029279,9sleep00-21swapper/019:05:410
2649728564,6sleep10-21swapper/119:08:151
50172630,2sleep15013-21ssh23:35:171
2672299270,26cyclictest0-21swapper/223:22:572
2672599250,1cyclictest0-21swapper/321:00:123
2672099250,24cyclictest0-21swapper/121:00:121
26716992418,2cyclictest225-21systemd-journal00:07:220
2672299230,23cyclictest0-21swapper/200:01:002
2672099231,4cyclictest141rcu_preempt21:15:411
2672599221,21cyclictest19519-21diskmemload23:26:383
2672099221,1cyclictest141rcu_preempt23:19:481
26716992212,6cyclictest29594-21apache223:53:010
26716992120,1cyclictest0-21swapper/000:02:580
26725992017,3cyclictest39-21ksoftirqd/322:29:333
2672299200,2cyclictest0-21swapper/223:45:252
2671699200,19cyclictest0-21swapper/023:05:320
2671699200,0cyclictest0-21swapper/022:12:210
2672299190,1cyclictest0-21swapper/221:16:242
2672099190,17cyclictest0-21swapper/100:05:071
2672599182,1cyclictest19519-21diskmemload23:33:373
26725991816,1cyclictest0-21swapper/323:43:403
26725991816,1cyclictest0-21swapper/323:22:033
26722991818,0cyclictest0-21swapper/221:13:152
26722991817,1cyclictest0-21swapper/223:15:512
2672299180,18cyclictest0-21swapper/221:33:452
26720991812,5cyclictest10476-21kworker/1:221:55:141
2672599171,2cyclictest27410-21ssh00:27:083
2672299179,7cyclictest0-21swapper/223:55:202
26722991717,0cyclictest0-21swapper/221:24:412
2672299170,17cyclictest0-21swapper/221:51:402
2672099170,10cyclictest0-21swapper/122:53:031
2672599164,6cyclictest1742-21apt-get19:25:123
2672299160,16cyclictest0-21swapper/200:16:212
2672099163,12cyclictest30706-21mailstats23:50:211
26720991613,3cyclictest0-21swapper/122:15:571
2672099161,14cyclictest11816-21ssh21:24:441
2671699164,2cyclictest225-21systemd-journal23:32:380
26716991614,1cyclictest0-21swapper/022:15:180
2671699160,15cyclictest0-21swapper/022:40:120
2672599156,1cyclictest0-21swapper/322:23:333
2672599151,9cyclictest0-21swapper/323:15:153
2672599151,3cyclictest0-21swapper/320:45:133
2672299154,5cyclictest225-21systemd-journal21:05:002
26722991515,0cyclictest0-21swapper/200:12:072
26722991510,5cyclictest26520-21apache200:27:282
26720991514,1cyclictest0-21swapper/100:23:561
2672099150,15cyclictest0-21swapper/100:01:301
26716991512,2cyclictest30512-21cron20:25:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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