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2026-04-19 - 13:28
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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 Sun Apr 19, 2026 00:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3007805991024,79cyclictest3071207-21apt21:05:124
3007805991024,79cyclictest3071207-21apt21:05:114
3007805999313,40cyclictest3143833-21ntpq23:15:174
300780599846,78cyclictest3155524-21chrt23:35:434
3007805997614,40cyclictest3010861-21/usr/sbin/munin19:15:184
3007805997214,39cyclictest3057733-21telnet20:40:124
3007805997113,39cyclictest0-21swapper/422:57:424
3007805997112,39cyclictest3151942-21wc23:30:184
3007805997031,39cyclictest0-21swapper/422:44:474
3007805996911,39cyclictest3178972-21cut00:20:144
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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