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2026-08-20 - 20:52
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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
Compare latency of primary with shadow system
Characteristics of the 10 highest latencies:
System rackfslot7.osadl.org (updated Thu Aug 20, 2026 12:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1259043998748,38cyclictest1371776-21sed10:35:011
1259043997638,19cyclictest1377217-21/usr/sbin/munin10:45:011
1259043997536,38cyclictest1291529-21sendmail-mta08:07:501
1259043997416,39cyclictest1382258-21chrt10:54:471
1259043997416,39cyclictest1324734-21munin-run09:10:001
1259043997234,19cyclictest1367299-21ntpq10:25:181
1259043997111,22cyclictest1926-21sendmail-mta08:57:491
1259043997032,19cyclictest1339859-21memory09:35:191
1259044996950,19cyclictest0-21swapper/209:10:162
1259043996810,19cyclictest0-21swapper/111:06:271
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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