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2021-09-28 - 09:53

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 20 highest latencies:
System rackdslot2.osadl.org (updated Tue Sep 28, 2021 00:46:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1268911750,6ptp4l401ktimersoftd/319:07:193
1690921700,3sleep33028799cyclictest20:50:303
1690921700,3sleep33028799cyclictest20:50:303
2644221450,2sleep00-21swapper/000:25:070
555981230,97rtkit-daemon1314-21mactelnetd19:08:281
54352930,2sleep30-21swapper/321:20:013
20452910,2sleep30-21swapper/322:35:043
2993528362,10sleep00-21swapper/019:09:340
296952803,20sleep20-21swapper/219:06:292
126891670,2ptp4l28578-21ptp4l23:05:293
85402640,2sleep10-21swapper/120:40:271
55598610,26rtkit-daemon920-21sensors19:10:281
119682590,3sleep10-21swapper/120:45:181
40592580,2sleep30-21swapper/319:55:213
278162580,2sleep20-21swapper/220:25:162
185962550,2sleep20-21swapper/223:35:102
30287995029,18cyclictest41-21ksoftirqd/319:12:293
3028799483,10cyclictest11137-21apt-get20:45:123
30286994814,29cyclictest11074-21needreboot21:25:122
30287994725,19cyclictest41-21ksoftirqd/322:48:213
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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