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2021-06-20 - 03:53

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

Latency plot of system in rack #d, slot #3
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 rackdslot3.osadl.org (updated Sun Jun 20, 2021 00:46:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1108621670,7sleep10-21swapper/119:05:261
128291151129,10phc2sys0-21swapper/319:08:233
12362999687,4cyclictest41-21ksoftirqd/323:50:133
12362999687,4cyclictest41-21ksoftirqd/323:50:123
12362999081,5cyclictest41-21ksoftirqd/322:45:133
12362998982,4cyclictest41-21ksoftirqd/323:20:133
12362998980,5cyclictest41-21ksoftirqd/319:55:133
1164428867,10sleep00-21swapper/019:05:460
56698870,14rtkit-daemon0-21swapper/219:06:072
12362998677,5cyclictest41-21ksoftirqd/320:20:123
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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