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2025-03-25 - 22:15

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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Data to construct the above plot have been generated using the RT test utility cyclictest.

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 Tue Mar 25, 2025 12:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3147963999085,3cyclictest0-21swapper/009:15:020
3147969997125,40cyclictest306-21in:imuxsock08:40:012
3147971996820,42cyclictest281-21systemd-logind11:45:003
3147969996821,42cyclictest272-21dbus-daemon11:00:002
3147969996720,42cyclictest3163985-21cron12:20:002
3147969996720,42cyclictest3163985-21cron12:20:002
314796399652,15cyclictest3150494-21munin-run08:00:010
3147971996421,7cyclictest3160779-21sed11:15:023
3147963996413,45cyclictest16850irq/134-800000007:19:510
314797199631,15cyclictest3155403-21sshd09:30:503
314796399633,16cyclictest3150221-21cron07:55:000
314796399632,14cyclictest3157509-21munin-run10:15:000
314796399632,12cyclictest3163750-21munin-run12:15:010
3147971996227,31cyclictest272-21dbus-daemon08:45:013
314797199622,16cyclictest3157257-21munin-run10:10:013
3147971996221,35cyclictest3148418-21cat07:20:003
314797199621,19cyclictest3154108-21sshd09:08:503
314796999629,46cyclictest0-21swapper/207:19:592
3147969996216,9cyclictest235-21systemd-journal10:30:002
314796399622,15cyclictest3155970-21munin-run09:45:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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