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2026-07-19 - 09:47
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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 rackdslot4.osadl.org (updated Sun Jul 19, 2026 00:45:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
61452225163,51sleep00-21swapper/019:07:300
138591206171,23phc2sys0-21swapper/319:07:003
61712203170,22sleep10-21swapper/119:07:511
60622201168,22sleep20-21swapper/219:06:322
3255821390,6sleep2662999cyclictest00:20:212
6629996630,3cyclictest33-21ksoftirqd/220:15:142
138491630,1ptp4l401ktimersoftd/322:40:533
662899610,23cyclictest32237-21cut20:00:191
662799615,16cyclictest15078-21grep20:30:190
662799615,16cyclictest15078-21grep20:30:190
662899600,23cyclictest31054-21vmstat21:00:281
662899600,23cyclictest31054-21vmstat21:00:281
662799605,16cyclictest32217-21sed20:00:190
138491600,1ptp4l27234-21fschecks_count20:55:153
662899590,24cyclictest23312-21/usr/sbin/munin19:40:271
662799594,17cyclictest27185-21sed20:55:140
6629995823,4cyclictest33-21ksoftirqd/222:55:002
662899588,18cyclictest17848-21sed20:35:221
662899580,23cyclictest223-21systemd-journal21:52:521
662799584,15cyclictest16711-21df_abs22:45:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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