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2026-04-19 - 03:19
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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 Apr 19, 2026 00:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
157721620,17sleep30-21swapper/318:58:403
22619912243,18cyclictest18971-21sendmail19:52:540
22619912048,11cyclictest0-21swapper/020:28:170
22619911652,13cyclictest12582-21latency_hist19:32:570
22619911651,59cyclictest14223-21timerwakeupswit22:03:290
2261991143,32cyclictest29091-21ssh23:23:270
22729911034,37cyclictest0-21swapper/100:08:081
22729911034,37cyclictest0-21swapper/100:08:081
2261991103,42cyclictest23727-21processes00:09:010
2261991103,42cyclictest23727-21processes00:09:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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