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2025-07-13 - 11:51

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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 rackeslot5s.osadl.org (updated Sun Jul 13, 2025 00:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
428399250,24cyclictest13951-21perf20:35:002
4277992522,2cyclictest9009-21cron19:20:000
4283992421,2cyclictest25823-21latency_hist00:20:002
428399240,23cyclictest30748-21ls21:10:012
427899240,23cyclictest0-21swapper/120:15:461
4277992420,3cyclictest0-21swapper/000:00:460
4283992321,1cyclictest26852-21turbostat23:15:002
4278992322,0cyclictest22381-21apt-get23:05:451
427899230,22cyclictest25935-21cron21:00:011
427899230,22cyclictest23699-21/usr/sbin/munin00:15:471
427899230,22cyclictest16871-21dump-pmu-power22:55:001
4277992321,1cyclictest30766-21awk21:10:000
4277992321,1cyclictest17061-21cron19:35:000
4277992319,4cyclictest0-21swapper/019:20:020
427799230,2cyclictest19507-21sendmail-msp19:40:000
427799230,23cyclictest0-21swapper/022:30:460
427799230,22cyclictest21885-21cron19:45:000
4288992222,0cyclictest0-21swapper/319:15:473
4288992221,1cyclictest0-21swapper/320:30:473
4288992220,1cyclictest32024-21sh22:20:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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