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2025-05-05 - 00:25

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 Sun May 04, 2025 12:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3911637998177,2cyclictest0-21swapper/012:35:020
3911637998177,2cyclictest0-21swapper/012:35:020
3911637996913,17cyclictest3921340-21munin-run10:20:000
391165199652,16cyclictest3923917-21munin-run11:10:013
391165199652,15cyclictest3919815-21munin-run09:50:023
391165199652,15cyclictest3919815-21munin-run09:50:013
391165199634,13cyclictest3922621-21modprobe10:45:013
391165199634,13cyclictest3922621-21modprobe10:45:013
3911651996316,42cyclictest3913367-21sshd07:41:343
391165199626,11cyclictest272-21dbus-daemon11:00:013
391165199622,7cyclictest3922092-21cron10:35:003
391165199622,15cyclictest3925198-21munin-run11:35:023
391165199622,14cyclictest3927242-21munin-run12:15:013
3911651996214,43cyclictest3927596-21cat12:20:013
391164399628,33cyclictest382-21ntpd10:50:022
3911637996215,13cyclictest3921897-21cat10:30:020
391165199612,54cyclictest3917989-21cron09:14:593
391165199612,14cyclictest3923624-21sshd11:01:343
391165199611,15cyclictest363-21snmpd12:39:473
391165199611,15cyclictest363-21snmpd12:39:473
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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