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2026-04-11 - 16:34

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #2

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 rack1slot2s.osadl.org (updated Sat Apr 11, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450350,0irq/25-eth10-21swapper/306:55:073
2042923430,0sleep00-21swapper/006:55:400
2049823324,0sleep10-21swapper/106:56:291
2041823324,0sleep20-21swapper/206:55:342
2076599130,0cyclictest0-21swapper/008:59:050
339980,0migration/317316-21sh10:14:393
339970,0migration/332339-21sh11:45:143
339960,0migration/326953-21munin-node11:03:593
339960,0migration/325632-21sh10:20:373
339960,0migration/324519-21sh12:22:373
339960,0migration/31745-21sh10:27:093
339960,0migration/310642-21sh10:33:503
29725060,0irq/27-eth0-tx-21962-21munin-node07:24:050
207659960,0cyclictest0-21swapper/009:48:360
207659960,0cyclictest0-21swapper/007:09:120
149960,0migration/0933-21sh11:06:130
149960,0migration/02878-21switchtime07:54:100
149960,0migration/027686-21fschecks_time10:24:000
149960,0migration/024561-21sh12:22:450
149960,0migration/019315-21kthreadcore08:09:050
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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