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2022-05-23 - 03:34

x86 Intel Atom E3950 @1600 MHz, Linux 5.6.19-rt12 (Profile)

Latency plot of system in rack #9, 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 -Sp99 -i200 -h400 -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 rack9slot2 (updated Fri May 20, 2022 00:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
235472233195,25sleep30-21swapper/33
235362232196,24sleep20-21swapper/22
234502228191,25sleep10-21swapper/11
233682228190,24sleep00-21swapper/00
83792580,4sleep0639-21snmpd0
188202570,1sleep00-21swapper/00
47002430,1sleep00-21swapper/00
2386899420,21cyclictest12939-21munin-run3
2386899388,16cyclictest14132chrt3
2386899380,23cyclictest16312-21sed3
2386899374,19cyclictest1295-21/usr/sbin/munin3
2386899371,21cyclictest16701-21seq3
2386899370,22cyclictest11196-21date3
2386899341,19cyclictest18108-21sendmail3
2386899331,17cyclictest0-21swapper/33
23855993314,4cyclictest24703-21seq0
23868993114,15cyclictest21588-21sed3
23868993114,14cyclictest933-21cat3
23868993114,14cyclictest2611-21cat3
23868992913,13cyclictest7635-21cat3
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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