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2026-03-13 - 03:52
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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
Characteristics of the 20 highest latencies:
System rackcslot4.osadl.org (updated Fri Mar 13, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17139302269208,46sleep00-21swapper/019:07:490
17139222264192,27sleep10-21swapper/119:07:451
179699540,3rtkit-daemon0-21swapper/123:24:020
17779982530,3sleep10-21swapper/121:30:011
179699520,4rtkit-daemon1795-21rtkit-daemon23:49:090
179699500,4rtkit-daemon1795-21rtkit-daemon21:37:410
1714240995014,8cyclictest1-21systemd22:25:011
1714240995013,10cyclictest1843959-21grep23:00:201
1714240995011,11cyclictest1730484-21grep19:45:221
1714240994912,12cyclictest1790089-21grep21:45:221
1714240994911,11cyclictest1727362-21sh19:40:001
179699480,4rtkit-daemon1795-21rtkit-daemon20:49:150
1714240994820,22cyclictest1718727-21python319:20:021
1714240994813,13cyclictest1846543-21apt-get23:05:281
1714240994811,9cyclictest1-21systemd21:45:011
1714240994811,9cyclictest1-21systemd21:40:011
1714240994713,12cyclictest1820765-21apt-get22:30:061
1714240994712,14cyclictest1768191-21ntpq21:15:191
1714240994712,11cyclictest1899756-21latency_hist00:20:021
1714240994711,11cyclictest1759052-21sh21:00:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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