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2026-04-24 - 15:55
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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 rackeslot6.osadl.org (updated Fri Apr 24, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
228327599113100,10cyclictest2370778-21latency_hist11:40:011
22832719910893,11cyclictest1213033-21systemd-journal09:20:000
22832759910293,6cyclictest2329954-21latency_hist09:35:021
2283271999688,5cyclictest2284776-21latency_hist07:15:000
2283271999583,9cyclictest2389059-21apt-get12:33:000
2283271999280,9cyclictest2340006-21/usr/sbin/munin10:05:220
2283271999265,13cyclictest2346395-21latency_hist10:25:010
2283275998976,10cyclictest2341895-21diskstats10:10:141
2283275998879,7cyclictest2325177-21latency_hist09:20:011
2283275998877,8cyclictest2347980-21latency_hist10:30:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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