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2026-03-14 - 14:22

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackeslot3s.osadl.org (updated Sat Mar 14, 2026 00:45:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
239420199901,4cyclictest150-21pr/ttyS219:45:030
2394201998629,40cyclictest2463204-21ssh23:30:060
2394201998629,40cyclictest2463204-21ssh23:30:060
2394201998529,51cyclictest2406611-21ssh21:23:440
2394201998529,51cyclictest2406611-21ssh21:23:430
239420199842,5cyclictest2451778-21munin-run23:05:010
239420199832,75cyclictest2431611-21ssh22:20:010
239420199812,42cyclictest2422736-21ssh22:00:000
2394201998018,33cyclictest2439262-21ssh22:36:420
239420199801,74cyclictest48-21kcompactd022:05:140
239420199801,49cyclictest2494089-21rm00:39:320
239420199782,46cyclictest2424944-21munin-run22:05:010
239420199782,46cyclictest2424944-21munin-run22:05:010
2394201997822,51cyclictest2484907-21ssh00:19:050
239420199751,4cyclictest2448326-21sshd22:57:020
2394201997420,44cyclictest16850irq/134-800000022:26:070
239420199731,7cyclictest2489884-21cut00:30:000
2394207997228,39cyclictest2450382-21sh23:01:351
239420199711,6cyclictest2427481-21ssh22:10:150
2394207997011,56cyclictest2400376-21diskmemload21:40:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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