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2025-08-28 - 04:58

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

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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Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 10 highest latencies:
System rackeslot4s.osadl.org (updated Wed Aug 27, 2025 12:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3390852994339,2cyclictest3395703-21fwupd07:11:390
3390859993532,2cyclictest3463541-21kworker/u8:3+events_unbound08:30:222
3390859993532,2cyclictest3385904-21kworker/u8:4+events_unbound07:25:172
3390863993428,4cyclictest3437722-21latency_hist07:55:003
3390859993431,2cyclictest3681734-21kworker/u8:5+events_unbound12:00:172
3390859993430,3cyclictest3499789-21kworker/u8:2+events_unbound09:10:172
3390859993330,2cyclictest3531189-21kworker/u8:0+events_unbound09:45:202
3390859993330,2cyclictest3505121-21kworker/u8:4+events_unbound09:40:162
3390859993229,2cyclictest3562302-21kworker/u8:1+flush-259:010:05:262
3390859993028,1cyclictest3395703-21fwupd07:11:382
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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