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2026-06-28 - 19:21
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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 20 highest latencies:
System rack3slot6.osadl.org (updated Sun Jun 28, 2026 12:45:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
8730210858,40sleep10-21swapper/107:06:471
245842930,20sleep126-21ksoftirqd/112:25:361
284702880,9sleep126-21ksoftirqd/109:35:001
9218997728,44cyclictest22084-21latency_hist07:45:011
78542770,12sleep17859-21unixbench_singl10:05:361
921499755,59cyclictest3235-21apt-get09:55:140
9214997538,26cyclictest14-21ksoftirqd/012:20:130
747427527,36sleep00-21swapper/007:05:120
9218997330,8cyclictest26-21ksoftirqd/112:17:181
9218997328,9cyclictest26-21ksoftirqd/107:55:171
9218997328,9cyclictest26-21ksoftirqd/107:55:171
9218997327,40cyclictest18310-21latency_hist12:10:011
9218997030,35cyclictest9643-21/usr/sbin/munin07:10:211
9218996932,32cyclictest11333-21latency07:15:071
9218996932,32cyclictest11333-21latency07:15:071
9218996926,38cyclictest29030-21sh08:09:561
9214996935,28cyclictest14-21ksoftirqd/008:52:240
9218996824,39cyclictest5355-21awk10:00:221
9214996835,24cyclictest31608-21apt-get11:15:120
9214996830,24cyclictest0-21swapper/010:50:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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