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2022-01-23 - 10:14

Intel(R) Atom(TM) CPU E3845 @ 1.91GHz, Linux 4.19.37-rt19 (Profile)

Latency plot of system in rack #d, 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 -Up99 -i200 -h400 --smi -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 rackdslot2.osadl.org (updated Sun Jan 23, 2022 00:46:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
386821640,6sleep22007699cyclictest22:45:382
12699110886,9phc2sys0-21swapper/319:08:543
20074998570,9cyclictest9-21ksoftirqd/023:50:160
63092780,2sleep20-21swapper/220:50:192
194742746,18sleep10-21swapper/119:07:071
219232710,2sleep20-21swapper/219:10:182
189872701,55sleep20-21swapper/219:05:392
111152680,2sleep20-21swapper/220:15:302
326872650,3sleep1231rcuc/119:25:031
20077996112,3cyclictest121rcu_preempt23:00:083
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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