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2026-04-28 - 05:46
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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 Tue Apr 28, 2026 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20293991214,8cyclictest0-21swapper/000:07:350
20293991182,28cyclictest18839-21sh23:27:560
18826211612,77sleep018877-21sort18:57:380
18826211612,77sleep018877-21sort18:57:380
20293991153,73cyclictest0-21swapper/022:30:550
20293991153,73cyclictest0-21swapper/022:30:550
20293991153,29cyclictest6019-21/usr/sbin/munin23:07:420
20293991152,43cyclictest3206-21apt-get19:47:290
20293991143,29cyclictest5125-21runrttasks22:13:020
20293991142,23cyclictest27873-21ssh22:49:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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