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2026-05-21 - 23:12
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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 Thu May 21, 2026 12:46:11)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2317814999173,18cyclictest0-21swapper/312:16:293
231781499790,40cyclictest2386677-21/usr/sbin/munin09:15:213
2317814997517,39cyclictest2374683-21grep08:50:233
2317814997474,0cyclictest2357591-21ntpq08:20:173
2317814997436,19cyclictest2352411-21mailstats08:10:213
2317814997214,39cyclictest2494959-21ntp_states12:30:223
2317814997214,39cyclictest2325910-21munin-run07:24:593
2317814997113,39cyclictest2343630-21irqstats07:55:183
2317814997031,19cyclictest2416885-21cpu10:10:113
2317814996950,18cyclictest0-21swapper/307:35:103
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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