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2026-04-02 - 03:24
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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 rackeslot6.osadl.org (updated Wed Apr 01, 2026 12:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1692332999484,7cyclictest1724278-21kworker/u8:2+flush-179:009:10:001
1692332998980,7cyclictest1764402-21apt-get10:55:011
1692330998777,7cyclictest1735702-21latency_hist09:25:020
1692332998476,6cyclictest1695365-21latency_hist07:20:001
1692330998271,7cyclictest266-21systemd-journal08:10:180
1692330998270,10cyclictest1787452-21apt-get12:05:120
1692332998170,8cyclictest266-21systemd-journal12:25:001
1692330998175,4cyclictest1730957-21kworker/u8:3+flush-179:009:20:000
1692330998126,51cyclictest1-21systemd12:24:590
1692332998068,9cyclictest1767846-21apt-get11:05:031
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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