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2024-04-23 - 23:09
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rack9slot2.osadl.org (updated Tue Apr 23, 2024 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
212892303241,51sleep20-21swapper/22
195812272236,23sleep10-21swapper/11
211272267182,48sleep30-21swapper/33
212652233195,25sleep00-21swapper/00
2145899170165,3cyclictest27293-21diskstats0
2146699153149,2cyclictest0-21swapper/22
92921500,3sleep12146399cyclictest1
2102621400,4sleep32146999cyclictest3
21463999995,2cyclictest26285-21apt-get1
247852460,2sleep10-21swapper/11
15292430,1sleep01530-21expr0
15292430,1sleep01530-21expr0
2146699351,30cyclictest14205-21memory2
21466993415,16cyclictest20012-21munin-run2
21466993414,17cyclictest32104-21ntp_kernel_pll_2
21466993313,17cyclictest11275-21ps2
2146699322,27cyclictest21539-21latency_hist2
2146699319,4cyclictest10041-21cut2
21463993120,8cyclictest10950-21cat1
2146699301,3cyclictest21122-1kworker/2:1H2
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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