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2022-07-01 - 01:27

x86 Intel Atom E3950 @1600 MHz, Linux 5.6.19-rt12 (Profile)

Latency plot of system in rack #9, slot #2
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 10 highest latencies:
System rack9slot2 (updated Thu Jun 30, 2022 12:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
123332255176,25sleep30-21swapper/33
123702253177,43sleep00-21swapper/00
123712251187,34sleep10-21swapper/11
124522230194,24sleep20-21swapper/22
119802580,1sleep30-21swapper/33
141472550,2sleep20-21swapper/22
12784995213,10cyclictest30983-21idleruntime-cro2
12784993913,10cyclictest20526-21wc2
29532380,2sleep20-21swapper/22
1278499386,9cyclictest0-21swapper/22
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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