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2026-03-29 - 17:58

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 20 highest latencies:
System rack0slot6s.osadl.org (updated Sun Mar 29, 2026 00:46:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2093442253236,14sleep40-21swapper/419:07:4514
2093792244237,4sleep90-21swapper/919:08:1119
2093752243238,3sleep50-21swapper/519:08:0615
2092362235215,12sleep70-21swapper/719:06:2817
2094442234213,13sleep180-21swapper/1819:09:0010
2092322233214,12sleep30-21swapper/319:06:2413
2092642232187,13sleep100-21swapper/1019:06:522
2091582232213,12sleep140-21swapper/1419:05:346
2091902231210,13sleep190-21swapper/1919:06:0011
2091762231210,13sleep80-21swapper/819:05:4818
2094362229208,13sleep120-21swapper/1219:08:534
2091552227207,12sleep110-21swapper/1119:05:313
2094472226204,13sleep00-21swapper/019:09:020
2092352225206,12sleep60-21swapper/619:06:2716
2095302224205,12sleep170-21swapper/1719:09:599
2092442223203,12sleep150-21swapper/1519:06:367
2091842223204,12sleep130-21swapper/1319:05:535
2092812220200,12sleep10-21swapper/119:07:031
2093862217196,13sleep160-21swapper/1619:08:178
2093422216197,12sleep20-21swapper/219:07:4312
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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