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2026-09-20 - 08:24

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 Sun Sep 20, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
752029265,16sleep10-21swapper/119:09:551
724328976,9sleep00-21swapper/019:06:220
719028976,9sleep20-21swapper/219:05:382
749728371,8sleep30-21swapper/319:09:373
761899270,27cyclictest0-21swapper/221:21:332
7616992423,1cyclictest0-21swapper/122:43:591
761899230,2cyclictest0-21swapper/222:40:142
761899230,23cyclictest0-21swapper/223:13:352
761699230,19cyclictest0-21swapper/122:15:141
761899220,22cyclictest0-21swapper/222:35:532
7621992114,2cyclictest39-21ksoftirqd/300:38:163
7616992121,0cyclictest0-21swapper/121:51:221
256842210,1sleep20-21swapper/222:22:292
7611992019,1cyclictest0-21swapper/000:07:160
761899191,18cyclictest0-21swapper/221:10:172
761199190,0cyclictest0-21swapper/023:05:450
7618991816,1cyclictest32-21ksoftirqd/221:35:172
761899180,17cyclictest0-21swapper/200:10:012
761899180,16cyclictest0-21swapper/221:42:172
7616991816,1cyclictest9892-21latency_hist23:50:001
762199170,0cyclictest0-21swapper/322:34:193
761899170,17cyclictest0-21swapper/223:09:342
761899170,15cyclictest0-21swapper/222:00:182
7616991715,1cyclictest0-21swapper/121:47:061
7616991714,2cyclictest25184-21sed20:50:251
761199170,7cyclictest0-21swapper/023:25:140
43242170,0sleep00-21swapper/022:29:360
7621991613,2cyclictest13682-21ls19:20:193
7616991614,1cyclictest4028-21grep00:05:171
7616991614,1cyclictest0-21swapper/123:05:061
7616991611,5cyclictest0-21swapper/122:37:231
761699160,16cyclictest0-21swapper/121:26:111
7611991611,3cyclictest13-21ksoftirqd/022:51:150
7621991514,1cyclictest0-21swapper/322:20:383
761899151,1cyclictest141rcu_preempt21:17:122
761899150,2cyclictest0-21swapper/223:23:482
761899150,15cyclictest0-21swapper/223:38:012
761899150,14cyclictest0-21swapper/222:13:042
761699159,5cyclictest13331-21head19:20:171
761699150,15cyclictest0-21swapper/121:44:431
761199155,3cyclictest0-21swapper/021:20:160
7611991515,0cyclictest0-21swapper/022:41:390
761199150,1cyclictest141rcu_preempt21:17:260
762199143,6cyclictest15429-21sh23:14:593
762199142,11cyclictest0-21swapper/322:00:243
7621991413,1cyclictest0-21swapper/323:54:533
7621991411,2cyclictest17000-21cut20:35:173
762199140,14cyclictest0-21swapper/321:27:243
762199140,14cyclictest0-21swapper/300:29:273
761899149,3cyclictest9756-21idleruntime-cro21:34:592
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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