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2026-11-10 - 23:09

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 Tue Nov 10, 2026 00:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2485082272263,6sleep60-21swapper/619:00:316
2487182271223,17sleep70-21swapper/719:03:167
2486362270218,17sleep40-21swapper/419:02:084
2486942265221,18sleep20-21swapper/219:02:552
2487022264216,17sleep10-21swapper/119:03:011
2486252261215,37sleep50-21swapper/519:02:015
2487142259216,33sleep30-21swapper/319:03:123
2487012255203,18sleep00-21swapper/019:03:010
249059993532,2cyclictest1390-21snmpd21:21:316
249054992727,0cyclictest0-21swapper/523:49:135
249050992721,5cyclictest528-21systemd-journal20:55:044
24905099270,25cyclictest0-21swapper/423:18:134
24905099270,25cyclictest0-21swapper/423:18:134
24905099270,25cyclictest0-21swapper/419:09:174
249059992617,5cyclictest0-21swapper/619:31:046
24905999260,24cyclictest0-21swapper/620:15:026
24905499260,24cyclictest0-21swapper/521:47:435
24905499260,22cyclictest0-21swapper/520:23:185
249050992622,3cyclictest1390-21snmpd19:20:174
24905099260,22cyclictest0-21swapper/420:24:504
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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