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2026-04-03 - 10:15

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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 rack2slot7s.osadl.org (updated Fri Apr 03, 2026 00:43:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3322409997930,38cyclictest3454967-21rm23:07:490
3322410996452,7cyclictest0-21swapper/122:40:341
3322410996052,5cyclictest3528514-21systemd-run00:40:021
3322410995648,4cyclictest0-21swapper/120:00:011
3322411995340,9cyclictest3512469-21sh00:20:012
332240999521,10cyclictest3404295-21ssh22:05:320
3322411995136,5cyclictest0-21swapper/223:15:352
332241199512,38cyclictest3392087-21ssh21:50:332
332241199502,42cyclictest3424690-21ssh22:30:342
3322411994939,6cyclictest421-21dbus-daemon23:40:012
332240999492,10cyclictest3493516-21ssh23:55:310
332240999492,10cyclictest3493516-21ssh23:55:310
3322411994735,7cyclictest1421253-21cups-browsed21:28:142
332241199464,9cyclictest171rcu_preempt22:40:302
3322411994633,8cyclictest420-21avahi-daemon21:55:132
3322410994639,5cyclictest1054-21mta-sts-daemon20:50:221
3322409994638,4cyclictest3379685-21missed_timers21:35:260
3322409994635,7cyclictest1054-21mta-sts-daemon22:50:210
3322411994536,5cyclictest3403127-21systemd-run22:05:012
3322411994536,5cyclictest3403127-21systemd-run22:05:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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