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2026-01-11 - 08:42
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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 Sun Jan 11, 2026 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
974721318,103sleep019676-21snmpd19:08:430
9010212518,44sleep19016-21ntp_states19:05:011
9962991193,77cyclictest23375-40mandb23:59:261
9962991183,83cyclictest13760-21apt-get22:49:391
9962991123,75cyclictest26388-21apt-get00:04:371
9962991089,76cyclictest32021-21apt-get20:14:501
8642210810,66sleep28653-21/usr/sbin/munin19:04:502
99629910257,38cyclictest28636-21sh22:19:571
99579910159,13cyclictest181rcu_preempt22:31:370
2308621010,6sleep20-21swapper/223:04:432
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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