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2026-06-27 - 17:57

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 Sat Jun 27, 2026 00:46:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
43534099828,36cyclictest0-21swapper/522:12:5615
4831192770,1sleep8478983-21vf#0:020:02:2418
4831192770,1sleep8478983-21vf#0:020:02:2318
43487327443,8sleep190-21swapper/1919:09:5111
43484827267,2sleep70-21swapper/719:09:3817
4885472630,0sleep40-21swapper/420:10:0114
5062092610,2sleep14154-21ksoftirqd/1420:30:136
435332996056,1cyclictest201rcu_preempt19:23:3112
435334995856,2cyclictest478984-21vf#0:020:12:2513
17291570,44low-memory-moni0-21swapper/1819:09:1610
435375995653,3cyclictest0-21swapper/1721:19:139
435332995543,12cyclictest701318-21ntpq00:15:1712
435324995451,2cyclictest0-21swapper/021:19:130
43486525437,11sleep150-21swapper/1519:09:467
435369995352,1cyclictest496262-40tracker-miner-f20:19:587
435328995352,0cyclictest0-21swapper/119:34:541
43532499520,24cyclictest478918-21av:h264:df1420:10:310
17291520,41low-memory-moni0-21swapper/019:09:580
435332995126,0cyclictest0-21swapper/200:24:0812
435332995115,35cyclictest530414-40tracker-miner-f20:58:4712
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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