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2026-04-09 - 10:57
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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 Thu Apr 09, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23263211312,73sleep223292-21/usr/sbin/munin18:59:022
24463991123,92cyclictest3532-21apt-get22:03:551
23523210612,65sleep123536-21/usr/sbin/munin18:59:131
1765821040,7sleep131572-21diskmemload23:19:091
2998621030,8sleep20-21swapper/222:46:322
24463991033,31cyclictest14803-21sh22:21:421
24471991029,80cyclictest19858-21apt-get23:23:522
244639910249,35cyclictest24450-21cyclictest21:44:111
24471991014,85cyclictest12884-21taskset22:18:582
2446399993,81cyclictest12216-21apt-get20:03:491
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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