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2026-08-24 - 04:49

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 Aug 24, 2026 00:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23475762266238,18sleep10-21swapper/118:55:311
23475102258215,33sleep40-21swapper/418:54:344
23452732252212,31sleep60-21swapper/618:50:586
23476092247237,7sleep00-21swapper/018:55:550
23476052247222,17sleep50-21swapper/518:55:515
23473632244216,18sleep30-21swapper/318:52:363
23475592243219,16sleep20-21swapper/218:55:142
23473132241215,17sleep70-21swapper/718:51:587
25029662690,0sleep30-21swapper/323:47:433
23536602320,0sleep30-21swapper/319:01:473
2347939993228,2cyclictest0-21swapper/600:08:116
2347934993130,1cyclictest0-21swapper/521:22:135
2347939992928,1cyclictest0-21swapper/620:14:126
2347939992922,5cyclictest528-21systemd-journal00:25:106
234791699290,22cyclictest0-21swapper/123:26:241
2347939992821,5cyclictest528-21systemd-journal23:54:046
2347939992821,5cyclictest528-21systemd-journal00:38:276
2347921992725,1cyclictest1390-21snmpd23:32:232
234791699260,24cyclictest0-21swapper/120:52:091
234791699260,24cyclictest0-21swapper/119:51:101
234791699260,24cyclictest0-21swapper/119:51:091
234791699260,22cyclictest0-21swapper/122:47:391
2347939992521,3cyclictest1390-21snmpd21:16:486
234793999250,25cyclictest528-21systemd-journal20:45:576
234793999250,23cyclictest2498573-21irqstats23:37:346
234793999250,1cyclictest0-21swapper/623:06:186
2347934992521,3cyclictest1390-21snmpd21:17:165
2347934992521,3cyclictest1390-21snmpd21:06:265
2347930992524,1cyclictest0-21swapper/400:23:064
2347930992521,3cyclictest1390-21snmpd23:00:504
2347911992521,3cyclictest1390-21snmpd22:35:120
2347911992521,3cyclictest1390-21snmpd00:23:250
2347943992421,2cyclictest1390-21snmpd21:33:187
2347939992420,3cyclictest1390-21snmpd23:59:576
2347939992420,2cyclictest2374968-21ntpq19:43:216
2347939992419,3cyclictest2386180-21processes20:04:156
2347939992418,4cyclictest0-21swapper/620:24:136
234793999240,24cyclictest528-21systemd-journal20:25:116
234793999240,22cyclictest0-21swapper/623:27:476
234793999240,22cyclictest0-21swapper/600:08:526
2347934992421,2cyclictest1390-21snmpd19:34:345
234793499240,2cyclictest0-21swapper/520:08:085
2347925992420,3cyclictest1390-21snmpd20:37:193
2347925992420,3cyclictest1390-21snmpd19:10:073
2347921992421,3cyclictest1390-21snmpd23:51:062
2347921992421,2cyclictest1390-21snmpd21:01:522
2347921992421,2cyclictest1390-21snmpd19:39:102
2347921992420,3cyclictest1390-21snmpd22:21:332
2347921992420,3cyclictest1390-21snmpd21:08:472
2347916992421,3cyclictest2399417-21cat20:30:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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