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2022-01-23 - 10:07

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

Latency plot of system in rack #d, slot #1
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 rackdslot1.osadl.org (updated Sun Jan 23, 2022 00:46:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1930121740,3sleep21359599cyclictest21:15:122
550981220,94rtkit-daemon11728-21apache219:09:491
1330428767,9sleep20-21swapper/219:09:582
13596998274,4cyclictest41-21ksoftirqd/323:50:153
130942792,64sleep30-21swapper/319:07:113
13596997867,6cyclictest41-21ksoftirqd/319:55:143
79922770,7sleep21359599cyclictest23:40:102
13593997769,4cyclictest9-21ksoftirqd/020:50:140
13596997664,7cyclictest41-21ksoftirqd/300:10:153
13596997566,5cyclictest41-21ksoftirqd/322:30:143
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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