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2022-01-23 - 10:21

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

Latency plot of system in rack #d, slot #4
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 rackdslot4.osadl.org (updated Sun Jan 23, 2022 00:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
717324110,4sleep10-21swapper/119:05:051
1856521710,8sleep01069799cyclictest22:35:250
1856521710,8sleep01069799cyclictest22:35:250
251121700,8sleep21069999cyclictest22:55:272
3186521600,7sleep21069999cyclictest20:55:022
106999910086,9cyclictest33-21ksoftirqd/220:15:152
10699998468,8cyclictest33-21ksoftirqd/223:45:192
10699997965,8cyclictest33-21ksoftirqd/223:35:122
120791788,57phc2sys0-21swapper/319:08:113
10699997663,7cyclictest33-21ksoftirqd/220:35:172
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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