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2026-08-01 - 11:01
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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 10 highest latencies:
System rackeslot5.osadl.org (updated Sat Aug 01, 2026 00:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2548999310,30cyclictest19322-21idleruntime-cro20:05:010
25490993028,1cyclictest7320-21sendmail-msp19:40:011
2549299290,1cyclictest0-21swapper/319:10:123
2549199290,28cyclictest5819-21apt-get20:45:122
2549199290,28cyclictest0-21swapper/200:25:132
2549099290,28cyclictest4603-21munin-run23:00:011
2549099290,28cyclictest0-21swapper/120:45:121
2549099290,28cyclictest0-21swapper/120:35:121
2548999290,28cyclictest23538-21apt-get23:40:110
2548999290,28cyclictest0-21swapper/019:35:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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