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2026-05-21 - 12:19
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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 Thu May 21, 2026 00:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1479121358,93sleep114881-21unixbench_singl18:56:281
1479121358,93sleep114881-21unixbench_singl18:56:281
153919910889,13cyclictest20973-21latency_hist19:15:472
153859910511,79cyclictest15876-21apt-get22:36:030
15391999662,30cyclictest15372-21cyclictest22:10:232
15391999662,30cyclictest15372-21cyclictest22:10:232
15391999551,35cyclictest0-21swapper/221:51:192
15391999452,35cyclictest2374-21systemd-journal19:04:372
15389999458,30cyclictest1-21systemd21:50:461
1538999942,42cyclictest22262-21sh23:40:561
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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