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2026-01-07 - 19:41
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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 Wed Jan 07, 2026 12:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7799911952,16cyclictest10488-21ssh11:50:140
7799911952,16cyclictest10488-21ssh11:50:140
47721096,15sleep00-21swapper/007:07:460
7799910710,45cyclictest20501-21apt-get08:09:510
2718221040,7sleep027171-21ssh09:40:000
2718221040,7sleep027171-21ssh09:40:000
7799910279,17cyclictest7601-21kworker/u19:0+flush-179:008:24:520
35542950,7sleep30-21swapper/311:39:523
779999463,11cyclictest181rcu_preempt09:24:490
779999256,14cyclictest181rcu_preempt10:44:500
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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