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2026-06-18 - 08:53

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 Thu Jun 18, 2026 00:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
35115232275266,6sleep40-21swapper/419:07:534
35116642273252,18sleep50-21swapper/519:09:475
35115292263254,6sleep10-21swapper/119:07:571
35115212257213,35sleep20-21swapper/219:07:502
35114112256214,32sleep70-21swapper/719:06:197
35113742243218,16sleep30-21swapper/319:05:513
35115002241217,16sleep00-21swapper/019:07:320
35114012241218,15sleep60-21swapper/619:06:106
351196999350,1cyclictest0-21swapper/320:35:203
3511969993129,1cyclictest2874572-21kworker/3:2-events19:37:333
3511966993026,2cyclictest3647764-21cstates23:15:112
3511960992827,1cyclictest0-21swapper/120:17:101
351198799270,25cyclictest0-21swapper/621:28:526
351197699270,26cyclictest0-21swapper/422:30:584
351196999270,25cyclictest0-21swapper/320:59:123
351199199260,22cyclictest0-21swapper/723:40:537
351199199260,22cyclictest0-21swapper/700:39:077
3511982992625,1cyclictest0-21swapper/520:17:095
3511976992622,3cyclictest1390-21snmpd23:52:424
3511976992622,3cyclictest1390-21snmpd21:43:344
351197699260,25cyclictest0-21swapper/400:38:224
351196999260,22cyclictest0-21swapper/322:44:333
351196999260,1cyclictest0-21swapper/322:30:593
351196699260,24cyclictest0-21swapper/222:00:292
3511960992621,4cyclictest3618273-21cat22:20:161
3511957992622,3cyclictest1390-21snmpd21:33:490
3511991992521,3cyclictest1390-21snmpd22:27:037
351199199250,25cyclictest0-21swapper/700:21:247
3511987992521,3cyclictest1390-21snmpd19:55:376
3511987992521,3cyclictest1390-21snmpd00:08:486
3511976992522,2cyclictest1390-21snmpd21:12:454
3511976992521,3cyclictest1390-21snmpd23:31:314
3511976992521,3cyclictest1390-21snmpd23:31:314
351197699250,24cyclictest3682417-21updatedb00:16:334
3511969992522,2cyclictest1390-21snmpd21:28:283
3511969992521,3cyclictest1390-21snmpd19:24:153
3511969992520,3cyclictest0-21swapper/321:19:573
351196999250,1cyclictest0-21swapper/322:45:543
3511966992521,3cyclictest1390-21snmpd21:56:202
3511966992521,3cyclictest1390-21snmpd21:34:492
3511966992521,3cyclictest1390-21snmpd20:22:472
351196699251,22cyclictest1390-21snmpd19:42:152
3511960992521,3cyclictest1390-21snmpd20:38:371
3511957992521,3cyclictest1390-21snmpd22:33:150
3511991992420,3cyclictest3574282-21awk21:00:157
3511991992417,5cyclictest0-21swapper/700:25:157
351199199240,23cyclictest3680935-21df00:15:127
351199199240,22cyclictest0-21swapper/722:58:467
351199199240,22cyclictest0-21swapper/719:48:307
351199199240,22cyclictest0-21swapper/719:34:007
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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