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2026-04-28 - 07:16
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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 20 highest latencies:
System rack3slot6.osadl.org (updated Tue Apr 28, 2026 00:45:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
560991096,82cyclictest0-21swapper/019:55:220
560991096,82cyclictest0-21swapper/019:55:220
560991047,75cyclictest0-21swapper/021:05:120
56099916,66cyclictest0-21swapper/022:15:140
56099916,65cyclictest0-21swapper/022:00:240
565999028,23cyclictest457-21dbus-daemon00:40:001
565999028,23cyclictest457-21dbus-daemon00:40:001
560999020,36cyclictest11796-21aten2.4_r3power21:10:170
278202880,5chrt0-21swapper/020:20:560
56599877,21cyclictest18736-21apt-get21:30:141
56599863,19cyclictest7303-21ls00:00:021
565998525,19cyclictest243-21systemd-journal23:36:421
560998520,48cyclictest9787-21latency_hist21:05:010
56599847,19cyclictest7434-21apt-get00:00:141
565998436,42cyclictest0-21swapper/120:43:031
565998420,20cyclictest25741-21seq20:15:451
56599837,21cyclictest17545-21apt-get19:55:241
56599837,21cyclictest17545-21apt-get19:55:241
565998327,17cyclictest29382-21turbostat22:00:001
565998325,17cyclictest14714-21sort19:45:361
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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