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2024-04-20 - 10:51

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 Sat Apr 20, 2024 00:45:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4039000991132,18cyclictest131rcu_preempt19:55:033
403898599862,7cyclictest0-21swapper/000:05:020
403898599821,78cyclictest0-21swapper/023:10:020
4038985997773,2cyclictest0-21swapper/019:35:020
403898599771,72cyclictest0-21swapper/023:25:020
403898599771,72cyclictest0-21swapper/023:25:020
403898599736,26cyclictest4046831-21latency_hist21:40:020
403898599736,26cyclictest4046831-21latency_hist21:40:020
403900099718,12cyclictest131rcu_preempt20:50:023
4038985996310,18cyclictest4045647-21cron21:17:000
4038985996257,3cyclictest0-21swapper/019:45:010
403898599623,4cyclictest131rcu_preempt19:55:020
403898599623,4cyclictest131rcu_preempt19:55:020
4038985996223,10cyclictest12-21ksoftirqd/023:35:010
4038992996113,11cyclictest0-21swapper/221:35:012
4038985996120,36cyclictest4040215-21sshd19:34:520
403898899609,25cyclictest4040977-21kworker/u8:219:55:021
403898899609,25cyclictest4040977-21kworker/u8:219:55:011
4038992995816,9cyclictest30-21ksoftirqd/200:00:012
4038985995815,7cyclictest12-21ksoftirqd/023:15:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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