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2026-05-14 - 01:55
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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 Wed May 13, 2026 12:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31390994711,18cyclictest21913-21ntp_states09:05:132
31390993110,6cyclictest28-21ksoftirqd/207:45:192
31395993029,1cyclictest24825-21sendmail-msp12:40:023
3139099300,29cyclictest307-21systemd-journal11:25:012
3139099300,29cyclictest24571-21seq11:30:132
3138699300,29cyclictest17997-21apt-get07:50:131
3138699300,1cyclictest307-21systemd-journal11:15:011
3139599290,28cyclictest28127-21munin-run10:30:003
3139599290,28cyclictest12576-21apt-get11:05:113
3139599290,28cyclictest0-21swapper/310:20:113
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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