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2026-07-26 - 23:11

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #6

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 rack0slot6s.osadl.org (updated Sun Jul 26, 2026 00:45:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7195792270263,4sleep30-21swapper/319:06:5913
7197342249230,12sleep150-21swapper/1519:09:127
7197312244225,12sleep120-21swapper/1219:09:094
7196092243236,4sleep100-21swapper/1019:07:262
7195882243236,4sleep110-21swapper/1119:07:073
7195652241222,12sleep140-21swapper/1419:06:506
7197352240221,12sleep160-21swapper/1619:09:128
7194912240220,12sleep130-21swapper/1319:05:495
7195952237229,5sleep180-21swapper/1819:07:1410
7195862235228,4sleep90-21swapper/919:07:0519
7196422233213,12sleep190-21swapper/1919:07:5511
7195842233213,13sleep80-21swapper/819:07:0418
7165562232212,12sleep70-21swapper/719:05:0217
7197452231211,13sleep50-21swapper/519:09:2215
7195992229211,11sleep10-21swapper/119:07:171
7197742227209,11sleep40-21swapper/419:09:4114
7198002226208,11sleep20-21swapper/219:09:5912
7196452224204,12sleep00-21swapper/019:07:560
7195052224204,13sleep60-21swapper/619:06:0216
7197612223204,12sleep170-21swapper/1719:09:349
72018399350,35cyclictest0-21swapper/919:41:5919
72018399350,0cyclictest0-21swapper/920:59:5919
72018199350,0cyclictest0-21swapper/821:36:5918
72020899340,33cyclictest0-21swapper/1719:56:599
72018399340,34cyclictest0-21swapper/922:29:5919
72018399340,34cyclictest0-21swapper/922:29:5919
72018399340,0cyclictest1061ktimers/921:15:5919
72016299340,33cyclictest0-21swapper/320:44:5913
720208993333,0cyclictest0-21swapper/1723:41:599
720208993333,0cyclictest0-21swapper/1723:30:599
720208993333,0cyclictest0-21swapper/1723:23:599
720208993333,0cyclictest0-21swapper/1721:58:599
72020899330,33cyclictest0-21swapper/1722:15:599
72020899330,33cyclictest0-21swapper/1722:15:599
72020899330,33cyclictest0-21swapper/1721:29:599
72020899330,33cyclictest0-21swapper/1721:01:599
72020899330,33cyclictest0-21swapper/1720:45:599
72020899330,33cyclictest0-21swapper/1719:41:599
72020899330,0cyclictest0-21swapper/1723:50:599
72020899330,0cyclictest0-21swapper/1719:27:599
720199993331,1cyclictest0-21swapper/1420:34:596
72019799330,33cyclictest0-21swapper/1321:51:595
72019799330,33cyclictest0-21swapper/1320:12:595
720190993331,1cyclictest6513-21qemu-system-x8622:35:593
720183993333,0cyclictest0-21swapper/923:33:5919
720183993333,0cyclictest0-21swapper/919:32:5919
720183993333,0cyclictest0-21swapper/919:26:5919
72018399330,33cyclictest0-21swapper/920:33:0519
72018399330,0cyclictest0-21swapper/921:06:5919
72018399330,0cyclictest0-21swapper/919:57:5919
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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