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2025-12-25 - 20:07

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 20 highest latencies:
System rack0slot3s.osadl.org (updated Thu Dec 25, 2025 00:44:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5325102263216,37sleep30-21swapper/319:05:423
5325312258216,33sleep60-21swapper/619:06:026
5327732256215,31sleep40-21swapper/419:08:574
5326382254220,25sleep10-21swapper/119:07:261
5320442250225,16sleep20-21swapper/219:05:262
5325162247220,18sleep00-21swapper/019:05:480
5325682246219,18sleep70-21swapper/719:06:367
5325122245219,17sleep50-21swapper/519:05:445
533132993521,1cyclictest1380-21snmpd23:50:532
533137993433,1cyclictest0-21swapper/300:15:533
53312399338,24cyclictest0-21swapper/023:10:210
533123993315,17cyclictest538226-21ntpq19:15:210
533123993228,2cyclictest0-21swapper/019:47:160
533141993028,1cyclictest392288-21kworker/4:2+events19:35:224
533123993024,4cyclictest614461-21df21:35:120
533123993013,2cyclictest0-21swapper/019:35:130
533123992924,4cyclictest527-21systemd-journal23:46:120
533123992923,4cyclictest527-21systemd-journal19:50:480
533132992826,1cyclictest383980-21kworker/2:0-events22:30:392
53312399283,23cyclictest527-21systemd-journal19:28:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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