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2026-05-20 - 06:54
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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 May 20, 2026 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
581421127,16sleep00-21swapper/018:57:240
62319910452,22cyclictest6216-21cyclictest21:29:221
62369910258,13cyclictest181rcu_preempt00:26:092
62319910120,39cyclictest31-21ksoftirqd/122:26:171
62269910014,56cyclictest14153-21ssh22:49:330
6236999766,8cyclictest181rcu_preempt22:43:352
6236999663,9cyclictest181rcu_preempt19:55:512
6231999559,11cyclictest181rcu_preempt22:50:161
6231999460,8cyclictest181rcu_preempt19:01:241
6236999361,12cyclictest181rcu_preempt23:01:552
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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