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2026-05-22 - 02:40

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 Fri May 22, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2061232264237,18sleep70-21swapper/719:06:287
2060782262215,15sleep10-21swapper/119:05:501
2061912261217,35sleep00-21swapper/019:07:180
2062642258213,15sleep60-21swapper/619:07:566
2063952257212,36sleep20-21swapper/219:09:292
2061652247202,16sleep50-21swapper/519:06:595
2040672245222,15sleep30-21swapper/319:05:123
2040592244219,17sleep40-21swapper/419:05:054
206727993734,2cyclictest2707-21kworker/4:2+events20:49:594
206722993733,3cyclictest376111-21cat00:15:153
20673199350,34cyclictest0-21swapper/519:40:115
206736992827,1cyclictest0-21swapper/623:45:156
206722992827,1cyclictest0-21swapper/320:20:143
206713992827,1cyclictest0-21swapper/123:45:151
20673199270,25cyclictest0-21swapper/520:37:385
20671399270,25cyclictest0-21swapper/100:24:351
206709992712,2cyclictest0-21swapper/000:32:580
206743992622,3cyclictest1391-21snmpd19:38:367
20674399260,22cyclictest0-21swapper/720:45:147
206727992624,1cyclictest2707-21kworker/4:2+events00:27:334
20672799260,22cyclictest0-21swapper/422:20:444
206722992625,1cyclictest0-21swapper/321:25:153
20672299260,24cyclictest0-21swapper/322:02:283
20672299260,22cyclictest0-21swapper/319:51:423
206718992624,1cyclictest224141-21/usr/sbin/munin19:40:112
206713992622,3cyclictest1391-21snmpd00:12:021
20671399260,22cyclictest0-21swapper/122:49:501
206743992521,3cyclictest312986-21cat22:20:157
206743992521,3cyclictest1391-21snmpd00:14:207
206743992521,3cyclictest1151-21lldpd19:26:477
206743992516,5cyclictest0-21swapper/719:12:407
206736992518,5cyclictest0-21swapper/622:00:586
20673699250,23cyclictest0-21swapper/600:20:596
206731992521,3cyclictest1391-21snmpd23:27:095
206731992518,5cyclictest0-21swapper/520:24:525
20673199250,1cyclictest0-21swapper/523:01:065
20673199250,1cyclictest0-21swapper/520:02:375
206727992522,2cyclictest2707-21kworker/4:2+events20:20:194
206722992521,3cyclictest1391-21snmpd23:04:003
206722992521,3cyclictest1391-21snmpd20:10:373
206722992518,5cyclictest0-21swapper/319:27:153
20672299250,1cyclictest0-21swapper/322:21:503
20672299250,0cyclictest0-21swapper/322:05:583
206718992521,3cyclictest1391-21snmpd23:33:412
206718992521,3cyclictest1391-21snmpd20:56:262
206718992518,3cyclictest0-21swapper/219:36:572
206713992518,5cyclictest0-21swapper/120:50:141
206709992521,3cyclictest1391-21snmpd22:46:320
206709992521,3cyclictest1391-21snmpd22:16:430
206709992521,3cyclictest1391-21snmpd20:01:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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