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2025-04-21 - 10:51
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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 rackeslot5.osadl.org (updated Mon Apr 21, 2025 00:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
895099300,2cyclictest2922-21idleruntime-cro21:15:003
895099290,28cyclictest30108-21apt-get19:55:143
895099290,1cyclictest0-21swapper/320:05:143
8945992927,1cyclictest16788-21munin-run21:50:002
894599290,28cyclictest31036-21apt-get23:50:152
894599290,28cyclictest0-21swapper/223:35:122
894299290,28cyclictest16666-21apt-get20:35:151
894299290,28cyclictest0-21swapper/120:00:131
8940992927,1cyclictest0-21swapper/023:10:000
894099290,28cyclictest0-21swapper/021:34:590
894099290,1cyclictest17520-21cron23:15:000
894099290,1cyclictest15876-21cron19:25:000
895099280,27cyclictest0-21swapper/300:00:133
895099280,0cyclictest0-21swapper/321:40:133
8945992828,0cyclictest0-21swapper/219:35:172
8945992828,0cyclictest0-21swapper/219:35:172
8945992827,1cyclictest11448-21apt-get21:35:152
8945992827,0cyclictest29329-21apt-get22:20:132
894599280,28cyclictest0-21swapper/223:40:122
8942992828,0cyclictest0-21swapper/123:10:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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