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2025-05-09 - 10:14

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

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 10 highest latencies:
System rackeslot4s.osadl.org (updated Fri May 09, 2025 00:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1259640994526,14cyclictest1312716-21latency_hist20:00:012
1259633993630,4cyclictest1265105-21/usr/sbin/munin19:15:150
1259644993327,4cyclictest3000860-21systemd-journal21:25:003
1259644993226,4cyclictest1480421-21latency_hist22:40:013
1259644992925,3cyclictest1338771-21kworker/u8:1+flush-259:021:50:003
1259644992715,10cyclictest1338771-21kworker/u8:1+flush-259:020:55:003
1259644992715,10cyclictest1338771-21kworker/u8:1+flush-259:020:55:003
1259637992721,4cyclictest3000860-21systemd-journal19:27:011
1259633992723,3cyclictest1338771-21kworker/u8:1+events_unbound21:35:050
1259633992722,3cyclictest1-21systemd22:31:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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