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2021-10-24 - 02:31

Intel(R) Atom(TM) Processor E3950 @ 1.60GHz, Linux 4.19.182-rt74 (Profile)

Latency plot of system in rack #d, slot #7
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 -n -p90 -i200 -h400 -a0-2 -t3 -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 20 highest latencies:
System rackdslot7.osadl.org (updated Wed Mar 24, 2021 00:45:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15568622234178,48sleep20-21swapper/219:08:562
15569302223174,41sleep00-21swapper/019:09:460
15565922222184,31sleep30-21swapper/319:05:313
15568512218179,31sleep10-21swapper/119:08:461
159848221850,2sleep30-21swapper/320:00:023
181813421730,4sleep0155720990cyclictest00:25:140
181813421730,4sleep0155720990cyclictest00:25:140
173382521700,3sleep30-21swapper/322:45:043
156229321610,3sleep30-21swapper/319:15:053
156229321610,3sleep30-21swapper/319:15:053
17154022950,4sleep01715391-21irqstats22:20:130
16892442890,2sleep10-21swapper/121:50:051
16892442890,2sleep10-21swapper/121:50:041
17497182710,4sleep233-21ksoftirqd/223:04:552
17497182710,4sleep233-21ksoftirqd/223:04:552
16270642690,4sleep01627066-21gltestperf20:35:010
1557209906458,4cyclictest1778893-21grep23:40:030
1557209906458,4cyclictest1778893-21grep23:40:020
1557234906357,3cyclictest1760634-21grep23:15:122
17648242610,1sleep20-21swapper/223:20:132
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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