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2026-08-02 - 21:56

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 Aug 02, 2026 00:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25385382267232,28sleep20-21swapper/218:48:032
25385572258217,32sleep30-21swapper/318:48:213
25384412258213,17sleep00-21swapper/018:46:440
25384812255231,16sleep60-21swapper/618:47:176
25384422244218,16sleep10-21swapper/118:46:451
25383492243217,16sleep40-21swapper/418:45:324
25385942242218,16sleep70-21swapper/718:48:527
25372252242219,15sleep50-21swapper/518:44:515
2538970993331,1cyclictest1390-21snmpd21:23:475
2538951993331,1cyclictest0-21swapper/121:23:471
2538956993028,1cyclictest1737050-21kworker/2:0+events19:53:512
2538956993027,2cyclictest1737050-21kworker/2:0+events23:28:272
253895699300,29cyclictest1907017-21gnome-shell22:28:132
253897899290,25cyclictest0-21swapper/720:44:047
2538965992726,1cyclictest0-21swapper/400:13:294
2538965992726,1cyclictest0-21swapper/400:13:294
2538956992725,1cyclictest1737050-21kworker/2:0+events21:44:452
2538978992621,4cyclictest1390-21snmpd23:26:227
253897399260,24cyclictest0-21swapper/619:42:576
2538961992625,1cyclictest0-21swapper/321:23:483
2538961992622,3cyclictest1390-21snmpd23:11:123
2538956992622,3cyclictest1390-21snmpd00:38:172
2538951992622,3cyclictest1390-21snmpd23:06:421
2538943992621,5cyclictest1390-21snmpd22:07:100
253894399260,24cyclictest0-21swapper/020:04:430
2538978992521,3cyclictest1390-21snmpd20:21:267
253897899250,25cyclictest0-21swapper/721:00:407
253897899250,23cyclictest0-21swapper/719:56:047
253897899250,22cyclictest0-21swapper/719:45:057
2538970992522,2cyclictest1907017-21gnome-shell23:12:455
2538965992521,3cyclictest1390-21snmpd23:16:364
2538965992521,3cyclictest1390-21snmpd19:35:484
2538951992521,3cyclictest2711626-21cat00:18:461
2538943992518,5cyclictest0-21swapper/022:00:570
253894399250,24cyclictest0-21swapper/020:09:250
2538978992420,3cyclictest1390-21snmpd19:10:117
2538978992418,4cyclictest0-21swapper/722:06:457
2538978992417,5cyclictest0-21swapper/719:04:407
253897899240,24cyclictest0-21swapper/700:19:337
253897899240,22cyclictest0-21swapper/723:52:437
2538973992422,1cyclictest1390-21snmpd19:13:096
253897399240,2cyclictest0-21swapper/619:23:526
253897399240,23cyclictest0-21swapper/618:55:456
253897399240,23cyclictest0-21swapper/618:55:456
253897399240,22cyclictest0-21swapper/623:46:586
253897399240,22cyclictest0-21swapper/622:26:026
253897399240,22cyclictest0-21swapper/619:59:576
2538970992422,1cyclictest1390-21snmpd22:04:165
2538970992420,3cyclictest1390-21snmpd19:52:565
2538965992421,2cyclictest1390-21snmpd23:40:594
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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