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2026-09-18 - 07:58
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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 Fri Sep 18, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
226049912164,50cyclictest28230-21apt-key21:04:022
225839911125,9cyclictest0-21swapper/019:54:010
22583991103,32cyclictest17138-21latency_hist22:34:030
22583991103,32cyclictest17138-21latency_hist22:34:030
22583991084,27cyclictest13263-21/usr/sbin/munin00:14:180
22583991084,27cyclictest13263-21/usr/sbin/munin00:14:180
225839910827,11cyclictest0-21swapper/020:59:010
571321060,7sleep10-21swapper/119:55:081
22583991063,31cyclictest7039-21/usr/sbin/munin00:04:250
22583991062,34cyclictest18319-21unixbench_multi22:34:380
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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