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2026-09-22 - 12:07
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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 rackbslot7.osadl.org (updated Tue Sep 22, 2026 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25531212112,70sleep024596-21/usr/sbin/munin19:04:300
26096991192,27cyclictest22920-21proc_pri21:44:160
26096991192,27cyclictest22920-21proc_pri21:44:160
896921100,10sleep08954-21apt-get23:08:550
260969911052,9cyclictest4595-21kworker/u17:1+rpciod22:44:190
260969911052,9cyclictest4595-21kworker/u17:1+rpciod22:44:190
26096991098,33cyclictest29996-21apt-get23:43:580
260969910810,79cyclictest18693-21sh23:24:450
261139910668,9cyclictest181rcu_preempt22:14:102
2612099963,74cyclictest19361-21chrt00:19:153
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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