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2026-03-25 - 15:14
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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 rackfslot7.osadl.org (updated Wed Mar 25, 2026 00:46:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1882453999618,59cyclictest1989359-21latency_hist22:25:012
188245399802,59cyclictest2042592-21runrttasks00:00:122
1882453997636,39cyclictest796-21gdbus21:15:012
1882457997412,19cyclictest0-21swapper/420:45:154
1882453997137,34cyclictest0-21swapper/223:40:472
1882453996123,38cyclictest2051107-21if_eno300:15:172
1882453996123,19cyclictest1931814-21wc20:40:012
1882455996041,1cyclictest511ktimers/322:20:153
188245399602,39cyclictest2040481-21ntpq23:55:212
1882453995919,39cyclictest1923797-21/usr/sbin/munin20:25:172
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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